CN106646291A - Diamagnetic measuring probe, diamagnetic measuring rod and diamagnetic measuring device - Google Patents
Diamagnetic measuring probe, diamagnetic measuring rod and diamagnetic measuring device Download PDFInfo
- Publication number
- CN106646291A CN106646291A CN201611237402.9A CN201611237402A CN106646291A CN 106646291 A CN106646291 A CN 106646291A CN 201611237402 A CN201611237402 A CN 201611237402A CN 106646291 A CN106646291 A CN 106646291A
- Authority
- CN
- China
- Prior art keywords
- conductive coil
- diamagnetic
- measuring probe
- measurement
- insulating bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005292 diamagnetic effect Effects 0.000 title claims abstract description 103
- 239000000523 sample Substances 0.000 title claims abstract description 86
- 238000005259 measurement Methods 0.000 claims abstract description 68
- 239000002887 superconductor Substances 0.000 claims abstract description 43
- 230000005291 magnetic effect Effects 0.000 claims abstract description 35
- 230000000694 effects Effects 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000000565 sealant Substances 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 10
- 210000003298 dental enamel Anatomy 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 22
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 238000004804 winding Methods 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1238—Measuring superconductive properties
Abstract
The invention provides a diamagnetic measuring probe used for measuring Meissner effect of a superconductor. The diamagnetic measuring probe comprises an insulating rod, a conductive coil and a seal layer. The conductive coil comprises a first conductive coil and a second conductive coil, the second conductive coil is used for providing a magnetic field, and the first conductive coil is close to the second conductive coil and used for monitoring changes of induced electromotive force. The conductive coil is sealed to the insulating rod through the seal layer. The diamagnetic measuring probe is capable of realizing measurement of the Meissner effect of superconductive materials growing on insulating substrates.
Description
Technical field
The present invention relates to superconductor monitoring field, more particularly to a kind of diamagnetic measuring probe, diamagnetic measurement bar and diamagnetic
Measurement apparatus.
Background technology
Meisser effect is whether experimentally to judge a material as the important elements of superconductor.Meisser effect is specified
Superconducting state is a dynamic balance state, unrelated with the approach for how entering superconducting state, the zero-resistance phenomenon and Mai Si of superconducting state
Effect of receiving is two of superconducting state separate, the base attributes for connecting each other again.Simple zero resistance does not ensure that Mai Si
Receive the presence of effect, but zero resistance effect is again the necessary condition of Meisser effect.Therefore, weigh whether a kind of material is superconduction
Body, it is necessary to see whether be provided simultaneously with zero resistance and Meisser effect.
When a magnet and a superconductor in superconducting state close to each other, the magnetic field of magnet can make superconductor surface
In there is supercurrent.The magnetic field that this supercurrent is internally formed in superconductor, the magnetic field of lucky and magnet is equal in magnitude, direction
On the contrary.The two magnetic field cancellations, make the magnetic induction intensity inside superconductor be zero.That is perfect diamganetism.With perfect diamganetism
Object magnetic field cannot pass through, the coil mutual inductance near it can be caused to reduce.This phenomenon is Meisser effect.
Traditional diamagnetic measurement apparatus are to be placed on superconducting sample both sides to measure mutual inductance by two coils.Traditional measurement
Method is only used for measuring the superconducting sample for not depending on substrate.And the film superconductor for growth on an insulating substrate,
Coil cannot be placed in the side of substrate, leads to not measure mutual inductance.
The content of the invention
Based on this, it is necessary to cannot measure growth film superconduction on an insulating substrate for traditional diamagnetic measurement apparatus
The problem of the Meisser effect of body, there is provided a kind of diamagnetic measuring probe, diamagnetic measurement bar and diamagnetic measurement apparatus.
A kind of diamagnetic measuring probe, for the Meisser effect of MEASUREMENT IN SUPERCONDUCTOR, including insulating bar, it is wound on the insulation
The conductive coil of rod, seals the sealant of the conductive coil；
The conductive coil includes the first conductive coil and the second conductive coil, and second conductive coil is to provide magnetic
, first conductive coil is arranged near second conductive coil, to the change for monitoring induced electromotive force.
In one embodiment, first conductive coil and second conductive coil are coaxially disposed.
In one embodiment, with the insulating bar as axle center, insulating bar described in first coils of electrical wire is arranged,
First conductive coil described in second coils of electrical wire is arranged；
The sealant seals first conductive coil and second conductive coil.
In one embodiment, first conductive coil at least 500 circles, first conductive coil is led with described second
The turn ratio of electric coil is 1:1-5:1.
In one embodiment, the insulating bar is ceramic rod, and a diameter of 0.5mm-2mm of the insulating bar is described to lead
Electric coil is enamel covered wire, a diameter of 25-50um of the enamel covered wire.
In one embodiment, the superconductor to be measured is to arrange film superconductor on an insulating substrate, described the
One conductive coil and second conductive coil are arranged on side of the film superconductor away from dielectric substrate.
A kind of diamagnetic measurement bar, it is for the Meisser effect of in site measurement superconductor including any of the above-described described diamagnetic
Measuring probe, connector and support member, one end of the connector is fixedly connected with the insulating bar, the connector it is another
End is fixedly connected with the support member.
In one embodiment, the connector is clamping plate, and the support member is magnetic rod；Will be described by the clamping plate
Diamagnetic measuring probe is fixed on the magnetic rod, and the magnetic rod drives the diamagnetic measuring probe movement to realize survey in situ
Amount.
A kind of diamagnetic measurement apparatus, including any of the above-described described diamagnetic measurement bar and first conductive coil be electrically connected
The power supply unit that the measuring apparatus for connecing are electrically connected with second conductive coil, the measuring apparatus and the power supply unit it
Between communicate to connect, to monitor the phase difference between the measuring apparatus and the power supply unit alternating voltage.
In one embodiment, the power supply unit and the measuring apparatus are integrated in a lock-in amplifier, and described first
Conductive coil is connected with the reference signal of the lock-in amplifier, the input of second conductive coil and the lock-in amplifier
Signal is connected.
Above-mentioned diamagnetic measuring probe, diamagnetic measurement bar and diamagnetic measurement apparatus, for the Meisser effect of MEASUREMENT IN SUPERCONDUCTOR.
The conductive coil of the diamagnetic measuring probe includes the first conductive coil and the second conductive coil.With the insulating bar as axle
The heart, first conductive coil is directly wound on the insulating bar.Second conductive coil is wound on first conductor wire
Circle.First conductive coil and second conductive coil are sealed in the insulating bar by the sealant.Described first leads
The set-up mode of electric coil and second conductive coil enables the diamagnetic measuring probe to realize high-precision in site measurement
Growth film superconductor Meisser effect on an insulating substrate.
Description of the drawings
The structural representation of the diamagnetic measuring probe that Fig. 1 is provided for one embodiment of the invention；
The canoe schematic diagram of conductive coil in the diamagnetic measuring probe that Fig. 2 is provided for one embodiment of the invention；
The structural representation of the diamagnetic measurement bar that Fig. 3 is provided for one embodiment of the invention；
The structural representation of the diamagnetic measurement apparatus that Fig. 4 is provided for one embodiment of the invention；
The Meisser effect test chart of the superconductor sample that Fig. 5 is provided for one embodiment of the invention.
Main element symbol description
Diamagnetic probe 10
Diamagnetic measurement bar 20
Diamagnetic measurement apparatus 30
Insulating bar 110
Conductive coil 200
First conductive coil 210
Second conductive coil 220
Sealant 310
Connector 410
Support member 420
Measuring apparatus 510
Power supply unit 520
Specific embodiment
In order that the goal of the invention of the present invention, technical scheme and technique effect become more apparent, below in conjunction with accompanying drawing pair
The embodiment of the diamagnetic measuring probe, diamagnetic measurement bar and diamagnetic measurement apparatus of the present invention is specifically described.It should be appreciated that this
The described specific embodiment in place is not intended to limit the present invention only to explain the present invention.
Fig. 1-2 is referred to, the present invention provides a kind of diamagnetic measuring probe 10, for the Meisser effect of MEASUREMENT IN SUPERCONDUCTOR.
The diamagnetic measuring probe 10 can measure the Meisser effect that substrate is the thin film superconductor of insulating materials.The diamagnetic measurement
Probe 10 includes insulating bar 110, conductive coil 200 and sealant 310.The conductive coil 200 is wound in the insulating bar
110.The conductive coil 200 is sealed in the insulating bar 110 by the sealant 310.
The insulating bar 110 is that the conductive coil 200 provides central supported.The material of the insulating bar 110 is not limited
System, as long as there is certain mechanical strength, can bear the weight of the conductive coil 200 and can fully seal.At one
In embodiment, the insulating bar 110 can be ceramic rod, and the material of the ceramic rod is corundum.Mainly due to the insulation of corundum
Property is good, there is certain mechanical strength, and air tight in ultrahigh vacuum.The shape of the insulating bar 110 is not intended to limit, as long as can
After ensureing that the conductive coil 200 winds, will not damage.Preferably, the insulating bar 110 can be cylinder.It is described
Insulating bar 110 selects cylinder, it is to avoid the conductive coil 200 unnecessary bending in winding process, it is ensured that described
The service life of conductive coil 200.The diameter of the insulating bar 110 is not intended to limit, different according to specific measurement sample, described
Insulating bar 110 can select different diameters.In one embodiment, a diameter of 0.5mm-2mm of the insulating bar 110.
It is also contemplated that mechanical strength during the diameter of the insulating bar 110 is chosen.The diameter of the insulating bar 110 can be according to test
The size of sample and select.To avoid affecting certainty of measurement, the diameter of the insulating bar 110 is chosen should be with measurement sample
Size is more or less the same.In one embodiment, a diameter of 1mm of the insulating bar 110, is 1mm*1mm for measurement table area
To the test sample of 5mm*5mm.
The conductive coil 200 includes the first conductive coil 210 and the second conductive coil 220.Second conductive coil
220 can be used to be passed through alternating voltage, to provide magnetic field.First conductive coil 210 is used to monitor induced electromotive force change.When
When superconductor to be measured is the thin film superconductor of insulating materials for substrate, first conductive coil 210 and second conductor wire
Circle 220 is arranged at the homonymy of superconductor.First conductive coil 210 is arranged near second conductive coil 220.Described
The relative position of one conductive coil 210 and second conductive coil 220 does not do specific restriction, as long as ensureing described first
Conductive coil 210 can monitor the change of induced electromotive force.First conductive coil 210 and second conductor wire
Circle 220 can be coaxially disposed, it is also possible to be provided separately.After second conductive coil 220 is passed through alternating voltage, described
Two conductive coils 220 will produce the first magnetic field.First magnetic field near superconductor surface when, superconductor surface can produce super
Electrical conduction current, this supercurrent is internally formed the second magnetic field in superconductor.First magnetic field is equal in magnitude with second magnetic field,
It is in opposite direction.The two magnetic fields are cancelled out each other, and make the magnetic induction intensity inside superconductor be zero.Now superconductor is in and resists completely
Magnetic state.Superconductor in complete magnetic state reduces neighbouring coil mutual inductance.Now first conductive coil 210 can
Measure induced electromotive force reduction..
In one embodiment, the conductive coil 200 is the wire with insulating barrier, i.e., in the conductive coil 200
The logical alternating voltage in two ends can just produce magnetic field.The conductive coil 200 includes the first conductive coil 210 and the second conductive coil
220.First conductive coil 210 has the first wire-entering head and the first terminal.It is described with the insulating bar 110 as axle center
First conductive coil 210 is directly wound on the insulating bar 110.During around the home, by the of first conductive coil 210
One wire-entering head is fixed on the first end of the insulating bar 110, and the insulating bar 110 is rotated afterwards so that the conductive coil 200
One encloses and is laid on the insulating bar 110.Then the conductive coil 200 is ridden on ground floor coil good around the home,
And then second layer coil is reversely laid on the ground floor coil for winding before.So repeatedly, can layer by layer by
The conductive coil 200 is wound on the insulating bar 110, forms first conductive coil 210, and reserves the first terminal.
First conductive coil 210 can multilayer around the home, each layer can multiturn around the home.In winding process, lead described in guarantee as far as possible
It is in close contact between electric coil 200, makes the number of turn in unit volume most.The process around the home of second conductive coil 220 with
The process basic simlarity around the home of first conductive coil 210.Second wire-entering head of second conductive coil 220 is fixed on
The first end of first conductive coil 210, rotates afterwards the insulating bar 110 so that the circle of the second conductive coil 220 1
One circle is laid on first conductive coil 210.Second conductive coil 220 can multilayer around the home, each layer can be around
Put multiturn.The layer and layer of the winding mode between layers of second conductive coil 220 and first conductive coil 210
Between winding mode it is consistent.Similarly, second conductive coil 220 is wound on into layer by layer first conductor wire
On circle 210, and reserve the second terminal.After the completion of around the home, from terms of the first end of the insulating bar 110 to the second end, described
The coiling direction of each layer of one conductive coil 210 is identical.From in terms of the first end of the insulating bar 110 to the second end, described
The coiling direction of each layer of one conductive coil 210 is identical.First conductive coil 210 and first conductive coil 210
Coiling direction might not be identical.In one embodiment, the conductive coil 200 passes through coil winding machine coiling.The coiling
Machine can automatically rotate the insulating bar 110, so that the conductive coil 200 1 is enclosed rolling up on the insulating bar 110.
The conductive coil 200 is sealed in the insulating bar 110 by the sealant 310.In one embodiment, the sealant
First conductive coil 210 and second conductive coil 220 are sealed in the insulating bar 110 by 310.The sealant
310 are sealed the conductive coil 200 using fluid sealant.The thickness of the sealant 310 is not intended to limit, as long as ensure that institute
State that diamagnetic measuring probe 10 is air tight under ultrahigh vacuum can to realize in site measurement.In one embodiment, it is described close
The thickness 1-3mm of sealing 310.Specifically, fluid sealant can select import vacuum compound, Torrseal vacuum compounds,
Vacseal vacuum compounds, Agilent vacuum compounds etc., the low temperature resistant vacuum compound of high temperature resistant.The vacuum sealing
Glue, for quick, permanent vacuum leak sealing.
Specifically, the material of the conductive coil 200 is not intended to limit, and the electric conductivity of the conductive coil 200 gets over Gao Yue
It is good.The conductive coil 200 can select silver wire, copper conductor.The conductive coil 200 has insulating barrier, such as enamel-covered wire.Institute
Conductive coil 200 is stated with certain mechanical strength.The diameter of the conductive coil 200 is not intended to limit, and can complete described
One conductive coil 210 and second conductive coil 220 around the home, and being capable of normal works.The conductive coil 200
Diameter can be 25-50um.In one embodiment, the conductive coil 200 be enamel covered wire, the diameter of the enamel covered wire
Scope is 25um.In the present embodiment, choose enamel covered wire and be mainly in view of asking for financial cost as the conductive coil 200
Topic.The diameter of the conductive coil 200 elects 25um as, the mechanical resistance properties during both meeting around the home, and unit is met again
The volume high demand of the number of turn around the home.
No matter in the ideal situation how many circle of the conductive coil 200 can sense Meisser effect.The conduction
The more signal to noise ratios of the number of turn of the number of turns are higher, and certainty of measurement is higher.In test process, as long as ensureing that signal to noise ratio is reached to a certain degree
Meisser effect can be clearly visible.In one embodiment, directly it is wound on first conductor wire of the insulating bar 110
210 at least 500 circles of circle.In actual measurement process, first conductive coil 210 be measuring coil, second conductor wire
Circle 220 is magnet exciting coil.The number of turn of the excitation coil is more, and the alternating magnetic field of generation is bigger.In one embodiment, it is described
First conductive coil 210 is 1 with the turn ratio of second conductive coil 220:1-5:1.For first conductive coil 210
Suitable turn ratio is selected with second conductive coil 220, makes the conductive coil 200 ensure that suitable diameter.Institute
State diamagnetic measuring probe 10 diameter ensure that with measurement sample size match.
In one embodiment, the conductive coil 200 can select the enamel covered wire of a diameter of 25um.The insulating bar
110 diameter can select the ceramic rod of 1mm.The winding of the conductive coil 200 is arranged on one end of the ceramic rod.Described
One conductive coil 210 winds totally 600 circle of the insulating bar 110.Second conductive coil 220 winds first conductive coil
210 totally 200 circles.The final diameter of the diamagnetic measuring probe 10 is 3mm.The sealant 310 selects Torrseal glue by institute
State conductive coil 200 to seal around the insulating bar 110, so as to make the diamagnetic measuring probe 10.The diamagnetic measurement is visited
10 it is small-sized, certainty of measurement is high.
In use, the diamagnetic measuring probe 10 is positioned over into the top of testing sample, and makes described second
The magnetic field that conductive coil 220 is produced can cover testing sample.More preferably, between the diamagnetic measuring probe 10 and testing sample
Every certain angle.Optimally, the diamagnetic measuring probe 10 is vertically arranged with testing sample.I.e. described insulating bar 110 with
Testing sample surface is vertical.The diamagnetic measuring probe is less than to the distance of testing sample can be with 0.5mm.But the diamagnetic measurement
Probe with the testing sample surface not in contact with.
Further, since the environmental factor that the growth and measurement of superconductor are relied on is very harsh, superconductor is once exposed to life
Long environmental externality, superconducting characteristic is likely to disappear.The setting of the sealant 310, enables the diamagnetic measuring probe 10 to hold
By the experiment condition of in site measurement.Because the diameter of the insulating bar 110 can select the ceramic rod of 1mm.The conductive coil
200 enamel covered wires that can select a diameter of 25um.Therefore, the diamagnetic measuring probe 10 can realize the to be measured of super-small
The measurement of sample Meisser effect.
Fig. 3 is referred to, the present invention provides a kind of diamagnetic measurement feeler lever 20, including the diamagnetic measuring probe 10, connector
410 and support member 420.
The connector 410 is used to connect the diamagnetic measuring probe 10 and the support member 420.The connector 410
Can be the fastener or threaded fasteners for being sheathed on the diamagnetic measuring probe 10 and the support member 420.It is appreciated that institute
As long as the concrete form for stating connector 410 is not intended to limit the diamagnetic measuring probe 10 and the support member 420 can be fixed
Connection.
The support member 420 is used to fixing and supporting the diamagnetic measuring probe 10.The support member 420 can will be described
What diamagnetic measuring probe 10 stretched into superconductor prepares cavity.The concrete shape of the support member 420 and concrete length are not intended to limit,
Can be separately configured in specific application process.
In one embodiment, the connector 410 is clamping plate, and the support member 420 is magnetic rod.By the clamping plate
The diamagnetic measuring probe 10 is fixed on into the magnetic rod.The magnetic rod drives the diamagnetic measuring probe 10 to move with reality
Existing in site measurement.The material and specification of the specific clamping plate and the magnetic rod does not do specific restriction, as long as can help
The diamagnetic measuring probe 10 is helped to realize the Meisser effect of in site measurement superconductor material.Realizing in site measurement process
In, the diamagnetic measuring probe 10 is first arranged at the growth of testing sample by the connector 410 and the support member 420
Environment.After superconductor experiment is completed, by the movement of the support member 420, the shifting of the diamagnetic measuring probe 10 is driven
It is dynamic.The diamagnetic measuring probe 10 is set to be located at the test position of testing sample.Described test position is exactly the diamagnetic measuring probe
10 and the position of testing sample Relative vertical.
In one embodiment, the insulating bar 110 reserves certain length, and the conductive coil 200 is wound on into institute
State one end of insulating bar 110.The sealant 310 is set in the periphery of the conductive coil 200, to form the diamagnetic survey
Amount probe 10.The other end for reserving the insulating bar 110 of certain length is fixedly installed on into the clamping plate.With the side of machinery
Method clamps the reserved length of the insulating bar 110 with the fixation diamagnetic measuring probe 10.The clamping plate connects with the magnetic rod
Connect, the second of the first wire-entering head of first conductive coil 210, the first terminal and second conductive coil 220 enters line
Head, the second terminal may be coupled on the corresponding electrode of the magnetic rod.By the corresponding external connection line of the magnetic rod,
First conductive coil 210 and second conductive coil 220 are in communication with the outside.
Fig. 4 is referred to, the present invention provides a kind of diamagnetic measurement apparatus 30.The diamagnetic measurement apparatus 30 include：Described
Diamagnetic measurement bar 20, measuring apparatus 510, power supply unit 520.
The measuring apparatus 510 are electrically connected with first conductive coil 210.The measuring apparatus 510 measure described
The induced electromotive force of one conductive coil 210.In one embodiment, the measuring apparatus 510 are oscillograph or universal meter, to
Measure the induced electromotive force of first conductive coil 210.
The power supply unit 520 is electrically connected with second conductive coil 220.The power supply unit 520 is described second
Conductive coil 220 is powered.In one embodiment, the power supply unit 520 is AC power, to for second conductor wire
Circle 220 provides alternating voltage.The power supply unit 520 can provide the alternating voltage of 1-5V.The setting of alternating voltage can be with root
Selected according to concrete condition.But need it is considered that alternating voltage is too high to produce the test that heat is unfavorable for Meisser effect.
In one embodiment, the frequency of alternating voltage can be 20Hz to 100kHz, and first conductive coil 210 can be received
Mutual induction electromotive force, while and noise can be filtered.
Oscillograph can be connected between the measuring apparatus 510 and the power supply unit 520, set for monitoring the measurement
Standby phase difference between 510 and the alternating voltage of the power supply unit 520.
In the present embodiment, in use, the diamagnetic measuring probe 10 is pushed using the diamagnetic measurement bar 20
In reaction cavity, at test sample, in site measurement is realized.Diamagnetic measuring probe 10, measuring apparatus 510, power supply unit 520 are connected
Connect and finish.Open the power supply unit 520 and provide alternating voltage for second conductive coil 220, measure described first conductive
The induced electromotive force of coil 210.Explanation is needed exist for, in the signal measured by the measuring apparatus 510, is divided into two
Point-solid part signal and imaginary signals.The solid part signal, refer to measure with the synchronous signal of input signal.The void
Portion's signal is that what is measured differ the signal of 90 degree of phase places with input signal.From physical meaning, the solid part signal is represented
Circuit loss, i.e. resistance sizes.And the imaginary signals represent inductance signal, you can to directly obtain mutually from the imaginary signals
Sense size.So in order to the real part and imaginary part of the signal for measuring are separated, the measuring apparatus 510 need to be set with the power supply
Standby 520 are communicated, i.e., two instruments need connection.Can be connected by oscillograph in one embodiment, the oscillograph
The phase difference between input voltage and induced electromotive force can be monitored.
In one embodiment, the diamagnetic measurement apparatus 30 include the diamagnetic measurement bar 20 and lock-in amplifier, institute
State the first conductive coil 210 to be connected with the reference signal of the lock-in amplifier, second conductive coil 220 and the lock phase
The input signal of amplifier is connected.In use, it is similar to the aforementioned embodiment.Will be described using the diamagnetic measurement bar 20
Diamagnetic measuring probe 10 pushes superconductor and prepares in cavity, at test sample.Diamagnetic measuring probe 10 and lock-in amplifier is complete
Into electrical connection.Second conductive coil 220 is connected with the input signal of the lock-in amplifier, for conductive for described second
Coil 220 provides alternating voltage.First conductive coil 210 is connected with the reference signal of the lock-in amplifier, for surveying
Try the induced electromotive force of first conductive coil 210.The feature of the alternating voltage that the lock-in amplifier is provided can with it is upper
That what is stated is identical.Here is omitted.
Refer to Fig. 5, the Meisser effect test chart of superconductor sample.In one embodiment, using the diamagnetic survey
The Meisser effect of the amount MEASUREMENT IN SUPERCONDUCTOR of device 30.In the present embodiment, the setting of the diamagnetic measuring probe 10 is as follows：It is described exhausted
Edge rod 110 adopts the ceramic rod of diameter 1mm.First conductive coil 210 is set around the ceramic rod 600 circle, described the
Two conductive coils 220 are around the circle of the ceramic rod 200.The conductive coil 200 is enamel covered wire that diameter is 25um.It is described close
The thickness of sealing 310 is 1mm.Measured surface area of sample is 3mm*3mm.Specific embodiment is as follows：Using the diamagnetic survey
The diamagnetic measuring probe 10 is placed in gauge rod 20 top of superconductor.The input signal end of the lock-in amplifier is opened, if
Put and 10uA, the alternating current of 10kHz are input into in second conductive coil 220.The alternating voltage for now showing input is 3V.
Keep the electric current of second conductive coil 220 constant, reduce temperature, and sense is measured by first conductive coil 210
Answer electromotive force signal variation with temperature.It should be noted that left side ordinate imaginary signals, that is, measure and input signal
The signal of 90 degree of phase places of difference, represents inductance signal.Right side ordinate is solid part signal, and the solid part signal indication circuit is damaged
Consumption, i.e. resistance sizes.
In test process, the alternating voltage or alternating current that the power supply unit 520 is provided can be according to concrete test need
Ask and voluntarily arrange.As can be seen that near the Kelvin of superconductor transition temperature 90, induced electromotive force is remarkably decreased in Fig. 5.Explanation
The precision of diamagnetic measuring probe 10 provided by the present invention, the diamagnetic measurement bar 20 and the diamagnetic measurement apparatus 30 be enough to visit
Measure the Meisser effect of superconductor.It is appreciated that the diamagnetic measurement apparatus 30 can equally realize in site measurement superconductor
Meisser effect.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but and
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of diamagnetic measuring probe, for the Meisser effect of MEASUREMENT IN SUPERCONDUCTOR, it is characterised in that including insulating bar (110),
The conductive coil (200) of the insulating bar (110) is wound on, the sealant (310) of the conductive coil (200) is sealed；
The conductive coil (200) includes the first conductive coil (210) and the second conductive coil (220), second conductor wire
To provide magnetic field, first conductive coil (210) is arranged circle (220) near second conductive coil (220), to supervise
Survey the change of induced electromotive force.
2. diamagnetic measuring probe as claimed in claim 1, it is characterised in that first conductive coil (210) and described the
Two conductive coils (220) are coaxially disposed.
3. diamagnetic measuring probe as claimed in claim 2, it is characterised in that with the insulating bar (110) as axle center, described the
One conductive coil (210) is arranged around the insulating bar (110), and second conductive coil (220) is conductive around described first
Coil (210) is arranged；
The sealant (310) seals first conductive coil (210) and second conductive coil (220).
4. diamagnetic measuring probe as claimed in claim 1, it is characterised in that first conductive coil (210) at least 500
Circle, first conductive coil (210) is 1 with the turn ratio of second conductive coil (220):1-5:1.
5. diamagnetic measuring probe as claimed in claim 1, it is characterised in that the insulating bar (110) is ceramic rod, it is described absolutely
A diameter of 0.5mm-2mm of edge rod (110), the conductive coil (200) is enamel covered wire, the enamel covered wire it is a diameter of
25-50um。
6. diamagnetic measuring probe as claimed in claim 1, it is characterised in that the superconductor to be measured is to be arranged on dielectric substrate
On film superconductor, first conductive coil (210) and second conductive coil (220) are arranged on film superconduction material
Expect the side away from dielectric substrate.
7. a kind of diamagnetic measurement bar, for the Meisser effect of in site measurement superconductor, it is characterised in that include such as claim
Diamagnetic measuring probe (10), connector (410) and support member (420) described in any one of 1-6, the one of the connector (410)
End is fixedly connected with the insulating bar (110), and the other end of the connector (410) is fixedly connected with the support member (420).
8. diamagnetic measurement bar as claimed in claim 7, it is characterised in that the connector (410) is clamping plate, the support member
(420) it is magnetic rod；The diamagnetic measuring probe (10) is fixed on by the magnetic rod, the magnetic rod band by the clamping plate
Move the diamagnetic measuring probe (10) mobile to realize in site measurement.
9. a kind of diamagnetic measurement apparatus, it is characterised in that including diamagnetic measurement bar (20) as described in claim 7 and institute
State the power supply that the measuring apparatus (510) of the first conductive coil (210) electrical connection are electrically connected with second conductive coil (220)
Equipment (520), communicates to connect between the measuring apparatus (510) and the power supply unit (520), sets to monitor the measurement
Standby phase difference between (510) and the power supply unit (520) alternating voltage.
10. diamagnetic measurement apparatus as claimed in claim 9, it is characterised in that the power supply unit (520) sets with the measurement
Standby (510) are integrated in a lock-in amplifier, the reference signal phase of first conductive coil (210) and the lock-in amplifier
Even, second conductive coil (220) is connected with the input signal of the lock-in amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237402.9A CN106646291A (en) | 2016-12-28 | 2016-12-28 | Diamagnetic measuring probe, diamagnetic measuring rod and diamagnetic measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237402.9A CN106646291A (en) | 2016-12-28 | 2016-12-28 | Diamagnetic measuring probe, diamagnetic measuring rod and diamagnetic measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106646291A true CN106646291A (en) | 2017-05-10 |
Family
ID=58832035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611237402.9A Pending CN106646291A (en) | 2016-12-28 | 2016-12-28 | Diamagnetic measuring probe, diamagnetic measuring rod and diamagnetic measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106646291A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01173879A (en) * | 1987-12-28 | 1989-07-10 | Taiyo Keisoku Kk | Measuring head device for critical temperature measuring machine of superconducting material |
| JP2000275312A (en) * | 1999-03-25 | 2000-10-06 | Daikin Ind Ltd | Squid fluxmeter |
| CN102866431A (en) * | 2012-09-13 | 2013-01-09 | 中国科学院电工研究所 | Low-temperature superconducting device for measuring gravity |
| CN103558641A (en) * | 2013-11-04 | 2014-02-05 | 中国石油天然气集团公司 | Well logging detector |
| CN103885010A (en) * | 2014-04-16 | 2014-06-25 | 中国科学院半导体研究所 | SQUID sealing cavity system for magnetic and electrical property synchronous measurement |
| CN104765009A (en) * | 2015-04-19 | 2015-07-08 | 上海交通大学 | Replaceable double-set coil probe and measuring method thereof |
| CN104820141A (en) * | 2015-03-10 | 2015-08-05 | 北京原力辰超导技术有限公司 | Superconducting tape current transfer capability measuring probe, measuring device and method thereof |
| CN206400083U (en) * | 2016-12-28 | 2017-08-11 | 清华大学 | Diamagnetic measuring probe, diamagnetic measurement bar and diamagnetic measurement apparatus |
-
2016
- 2016-12-28 CN CN201611237402.9A patent/CN106646291A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01173879A (en) * | 1987-12-28 | 1989-07-10 | Taiyo Keisoku Kk | Measuring head device for critical temperature measuring machine of superconducting material |
| JP2000275312A (en) * | 1999-03-25 | 2000-10-06 | Daikin Ind Ltd | Squid fluxmeter |
| CN102866431A (en) * | 2012-09-13 | 2013-01-09 | 中国科学院电工研究所 | Low-temperature superconducting device for measuring gravity |
| CN103558641A (en) * | 2013-11-04 | 2014-02-05 | 中国石油天然气集团公司 | Well logging detector |
| CN103885010A (en) * | 2014-04-16 | 2014-06-25 | 中国科学院半导体研究所 | SQUID sealing cavity system for magnetic and electrical property synchronous measurement |
| CN104820141A (en) * | 2015-03-10 | 2015-08-05 | 北京原力辰超导技术有限公司 | Superconducting tape current transfer capability measuring probe, measuring device and method thereof |
| CN104765009A (en) * | 2015-04-19 | 2015-07-08 | 上海交通大学 | Replaceable double-set coil probe and measuring method thereof |
| CN206400083U (en) * | 2016-12-28 | 2017-08-11 | 清华大学 | Diamagnetic measuring probe, diamagnetic measurement bar and diamagnetic measurement apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101839943B (en) | Resistance measurement device of conduction cooling type superconduction adapter | |
| CN102735964B (en) | High-temperature-superconductivity strip material multi-field characteristic measuring device | |
| CN105301093B (en) | A kind of superconducting coil defective locations detection system | |
| CN109872857B (en) | Low-temperature back field magnet and high-temperature superconducting unit alternating current loss measuring device | |
| CN108152766B (en) | Superconducting tape magnetizing device | |
| CN101387558A (en) | Loop sensor for temperature measurement of cable conductor and method for manufacturing same | |
| CN103336179B (en) | The low-temperature resistance of CICC superconducting joint measures making and the measuring method of system | |
| CN104267155A (en) | Measurement device for strain characteristics of material under extreme conditions | |
| CN107765058A (en) | A kind of current measuring device and method towards three-phase four-wire system balanced load | |
| CN206400083U (en) | Diamagnetic measuring probe, diamagnetic measurement bar and diamagnetic measurement apparatus | |
| CN1963477B (en) | Method and apparatus for non-contact serial measurement of uniformity of n index of superconducting line/ strip steel rolled stock | |
| CN204165919U (en) | Strain measurement equipment under multiple physical field | |
| CN103885010B (en) | For the SQUID annular seal space system of magnetics and electrical properties synchro measure | |
| CN106646291A (en) | Diamagnetic measuring probe, diamagnetic measuring rod and diamagnetic measuring device | |
| CN108982950B (en) | Sensor for testing YBCO film superconducting loop voltage signal and manufacturing method thereof | |
| CN104316772B (en) | For the capacitance measuring device under extreme physical condition | |
| CN106290997A (en) | High frequency measurement bar | |
| CN207440158U (en) | A kind of current measuring device towards three-phase four-wire system balanced load | |
| Ma et al. | Rogowski coil for current measurement in a cryogenic environment | |
| CN110068752A (en) | Dry type hollow shunt reactor low temperature is through-flow simulated testing system and its test method | |
| Wang et al. | Review of research and measurement for application properties of HTS tapes | |
| CN114002570A (en) | Fusion type series resonance inductance-capacitance dual pressure measurement test equipment | |
| CN110220930B (en) | Spin effect microelectronic integrated test bench | |
| CN207851157U (en) | The high voltage dielectric loss test device of comparison current signal is acquired using resitstance voltage divider | |
| CN206832975U (en) | High voltage electric energy on-site calibration device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |