CN204217195U - Laser plasma resonance body X source - Google Patents
Laser plasma resonance body X source Download PDFInfo
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- CN204217195U CN204217195U CN201420757254.3U CN201420757254U CN204217195U CN 204217195 U CN204217195 U CN 204217195U CN 201420757254 U CN201420757254 U CN 201420757254U CN 204217195 U CN204217195 U CN 204217195U
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- capillary
- accelerator
- torsional pendulum
- pendulum apparatus
- laser
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Abstract
The utility model discloses a kind of laser plasma resonance body X source, comprise support, accelerator capillary, Torsional pendulum apparatus capillary, gas, electrion system, laser, seed electrons bundle, accelerator capillary and Torsional pendulum apparatus capillary are connected in support, the through hole central shaft of accelerator capillary and Torsional pendulum apparatus capillary is parallel to each other but does not overlap, in accelerator capillary and Torsional pendulum apparatus capillary, gas is filled with in advance by inflation duct, electrion system is just being passed through, negative electrode is carried in the two ends of accelerator capillary and Torsional pendulum apparatus capillary, plasma channel is produced by electric discharge ionized gas, guided in the plasma channel of the laser pulse that laser exports in succession in accelerator capillary and Torsional pendulum apparatus capillary and produced cavity, the seed electrons bundle of following laser pulse enters into accelerated in cavity and resonance generation X-ray.The utility model has the advantages that structure is simple, easy to operate and X-ray radiation efficiency is high.
Description
Technical field
The utility model relates to laser coronal region to accelerate and synchrotron radiation light source domain, particularly relates to a kind of laser plasma resonance body X source.
Background technology
Due to the quasi-electroneutrality medium that plasma inherently ionizes, compared with the solid dielectric of conventional radio frequency accelerator, can carry the accelerating field of large several order of magnitude, be 10 as worked as plasma electron density
18cm
-3time, this electric field is about 1GV/cm, and increases along with the increase of electron density.Therefore, ultra-intense ultra-short laser pulse and plasma wave interaction can be utilized to build, and a new generation is compact, the miniaturized electronic accelerator of cost relative moderate, and achieves the high-quality electron beam that energy can reach several GeV in an experiment.One of important application of this type of electron beam produces X source by synchrotron radiation.
Except accelerator, producing X-ray also needs undulator or Torsional pendulum apparatus, makes electronics have swaying in the original direction of propagation of Vertical electron bundle.Tradition magnetic undulator is all very large on volume and weight, is not inconsistent with miniaturization; The cavity produced in laser coronal region accelerates can use as the plasma Torsional pendulum apparatus of electronic simultaneously, but electronics amplitude is general less, and cycle of oscillation significantly increases along with the increase of electron energy or the reduction of plasma density, be difficult to use in more high-power electron beam, and radiant light subnumber efficiency is lower.
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art, provides a kind of laser plasma resonance body X source.This utility model has that structure is simple, clear principle, the feature that easy to operate and X-ray radiation efficiency is high.
Technical solution of the present utility model is as follows:
A kind of laser plasma resonance body X source, comprise support, accelerator capillary, Torsional pendulum apparatus capillary, gas, electrion system, laser and seed electrons bundle, accelerator capillary and Torsional pendulum apparatus capillary are arranged in support, the central shaft of the cylindric through hole of accelerator capillary and Torsional pendulum apparatus capillary is parallel to each other but does not overlap, No. 1 inflation duct transversely arranged in support is communicated with the air-filled pore in Torsional pendulum apparatus capillary with accelerator capillary respectively with No. 2 inflation ducts, and the two ends of support are respectively arranged with negative electrode and positive electrode.Electrion system is by high voltage source, discharge resistance, current-limiting resistance, electric capacity, earthing device and inductance composition, gas is filled with respectively by No. 1 inflation duct and No. 2 inflation ducts in accelerator capillary and Torsional pendulum apparatus capillary, electrion system is carried in the two ends of accelerator capillary and Torsional pendulum apparatus capillary by negative electrode and positive electrode, plasma channel is produced by electric discharge ionized gas, guided in the plasma channel of the laser pulse that laser exports in succession in accelerator capillary and Torsional pendulum apparatus capillary and produced cavity, the seed electrons bundle of following laser pulse enter into inherent 2 sections, the accelerator capillary of cavity accelerated after, X-ray is produced in the 3 sections of resonance oscillations of Torsional pendulum apparatus capillary.
Optimize further for realizing the utility model, further step is: described accelerator capillary and Torsional pendulum apparatus capillary are made up of pottery or ruby or polythene material, the shape of accelerator capillary and Torsional pendulum apparatus capillary is cylinder or cuboid, described accelerator capillary is identical with the pore size of Torsional pendulum apparatus capillary, aperture size is 50 μm-500 μm, and the spacing between the through hole central shaft of accelerator capillary and Torsional pendulum apparatus capillary is the beamwidth of 0.1-1 times of laser pulse; Described support is made up of acrylic glass, and the shape of support is hollow cylindrical; The output voltage of described electrion system is 0.3kV-5kV; Described laser is CPA laser system, and the pulsewidth of the laser pulse of output is 10fs-200fs, and corresponding beamwidth is 10 μm-100 μm, and normalization vector potential amplitude size is 1-10; Gas in described accelerator capillary and Torsional pendulum apparatus capillary is hydrogen or helium; The electricity of described seed electrons bundle is 0.1pC-1000pC, and energy is 1MeV-100MeV.
Principle of the present utility model is as follows:
Ultrashort, super strong laser pulse can arrange the structure that electronics leaves ion of only having powerful connections in the plasma, i.e. cavity.Cavity is followed laser pulse and is travelled forward, and the electrostatic field formed due to separation of charge in cavity points to cavity center from surrounding, and the electrostatic field force along laser propagation direction (longitudinal direction) in cavity can make electronics be accelerated, and namely laser coronal region accelerates.Effectively guide when laser is subject to plasma channel, by the distance of dispersing much larger than vacuum diffraction with the constant propagation of beamwidth.If but initial time intrafascicular axle does not overlap with channel center axle, beam center will be no longer along channel center's axle straight-ahead motion, but change forward relative to channel center's axle swaying; Correspondingly, the cavity formed also will be have swaying to travel forward relative to channel center's axle.Due to the effect of static transverse field power, electronics also can have the swaying motion being similar to spring oscillator in cavity, if electronics is accelerated to close to the light velocity (Relativistic Electron), because this swaying electronics will produce electromagnetic radiation, as X-ray, namely cavity also can as the Torsional pendulum apparatus of synchrotron radiation.But now, the strength factor characterizing Torsional pendulum apparatus characteristic is directly proportional to electronics lateral amplitude of vibration, but usually, the swaying amplitude of intra-vacuolar electron is little, and radiation efficiency is low.If there is lateral periodicity change in oscillation at cavity center, and the transverse direction at cavity center is broken and is determined by plasma channel parameter cycle of oscillation, can be regulated and controled by gas density and discharge voltage; Relatively, the cycle of electronics swaying is relevant with plasma density and velocity of electrons.Therefore, can select suitable parameters, make the swaying cycle of electronics and the transverse direction at cavity center identical for cycle of oscillation of breaking, will be similar to resonant spring oscillator, there is resonance in electronics swaying, enlarges markedly its amplitude; Correspondingly, increase Torsional pendulum apparatus strength factor, the photon energy of radiation and each electronics will significantly increase in the number of photons of each radiation cycle of oscillation, high efficiency can produce X-ray.
The beneficial effects of the utility model are:
1, the size of Torsional pendulum apparatus is at centimetres, significantly reduces size and the weight of Torsional pendulum apparatus.
2, the direct level of Torsional pendulum apparatus is associated on accelerator, does not need to use extra vacuum target chamber and magnetic field regulation and control, is conducive to miniaturized use flexibly.
3, the direct level of Torsional pendulum apparatus is associated on accelerator, and uses same laser pulse, does not need additionally to use laser, has saved the cost on laser.
4, the utility model have that structure is simple, clear principle, the feature that easy to operate, X-ray radiation efficiency is high.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model laser plasma resonance body X source.
In figure: 1, support, 2, accelerator capillary, 3, Torsional pendulum apparatus capillary, 4, gas, 5, electrion system, 6, laser, 7, seed electrons bundle, 101, No. 1 inflation duct, 102, No. 2 inflation ducts, 103, negative electrode, 104, positive electrode, 501, high voltage source, 502, discharge resistance, 503, current-limiting resistance, 504, electric capacity, 505, earthing device, 506, inductance, 601, laser pulse, 602, cavity.
Embodiment
See accompanying drawing 1: a kind of laser plasma resonance body X source, comprise support 1, accelerator capillary 2, Torsional pendulum apparatus capillary 3, gas 4, electrion system 5, laser 6 and seed electrons bundle 7, accelerator capillary 2 and Torsional pendulum apparatus capillary 3 are arranged in support 1, the central shaft of the cylindric through hole of accelerator capillary 2 and Torsional pendulum apparatus capillary 3 is parallel to each other but does not overlap, No. 1 inflation duct 101 transversely arranged in support 1 is communicated with the air-filled pore in Torsional pendulum apparatus capillary 2 with accelerator capillary 2 respectively with No. 2 inflation ducts 102, the two ends of support 1 are respectively arranged with negative electrode 103 and positive electrode 104, negative electrode 103 and positive electrode 104 are preferably made up of copper product, electrion system 5 is by high voltage source 501, discharge resistance 502, current-limiting resistance 503, electric capacity 504, earthing device 505 and inductance 506 form, gas 4 is filled with respectively by No. 1 inflation duct 101 and No. 2 inflation ducts 102 in accelerator capillary 2 and Torsional pendulum apparatus capillary 3, electrion system 5 is carried in the two ends of accelerator capillary 2 and Torsional pendulum apparatus capillary 3 by negative electrode 103 and positive electrode 104, plasma channel is produced by electric discharge ionized gas 4, guided in the plasma channel of the laser pulse 601 that laser 6 exports in succession in accelerator capillary 2 and Torsional pendulum apparatus capillary 3 and produced cavity 602, the seed electrons bundle 7 of following laser pulse 601 enters into accelerated in cavity 602 and produces X-ray.Described accelerator capillary 2 and Torsional pendulum apparatus capillary 3 are made up of pottery or ruby or polythene material, and the shape of accelerator capillary 2 and Torsional pendulum apparatus capillary 3 is cylinder or cuboid.Accelerator capillary 2 is identical with the pore size of Torsional pendulum apparatus capillary 3, and aperture size is 50 μm-500 μm.Spacing between the through hole central shaft of accelerator capillary 2 and Torsional pendulum apparatus capillary 3 is the beamwidth of 0.1-1 times of laser pulse 601.Described support 1 is made up of acrylic glass, and the shape of support 1 is hollow cylindrical.The output voltage of described electrion system 5 is 0.3kV-5kV.Described laser 6 is CPA laser system, and the pulsewidth of the laser pulse 601 of output is 10fs-200fs, and corresponding beamwidth is 10 μm-100 μm, and normalization vector potential amplitude size is 1-10.Gas 4 in described accelerator capillary 2 and Torsional pendulum apparatus capillary 3 is hydrogen or helium.Described seed electrons bundle 7 electricity is 0.1pC-1000pC, and energy is 1MeV-100MeV.
Embodiment: fill with the identical same species 4 of density in the identical accelerator capillary 2 of pore size with Torsional pendulum apparatus capillary 3, discharged by electrion system 5, ionized gas 4 forms identical cylindrically symmetry plasma passage in accelerator capillary 2 with Torsional pendulum apparatus capillary 3, laser pulse 601 is subject to guided propagation in plasma channel, and beamwidth remains unchanged substantially.First laser pulse 601 impinges perpendicularly in the plasma channel in accelerator capillary 2, and along the coaxial propagation of channel center, cavity 602 is also along channel center's axle straight forward movement; Now, seed electrons bundle 7 enters into cavity 602 along channel center, is accelerated, and electron beam swaying is very little, mainly accelerated motion forward, and the efficiency of radiation X-ray is low.After accelerator capillary 2, laser pulse 601 enters into plasma channel in Torsional pendulum apparatus capillary 3 by departing from channel center, and the center of the cavity 602 formed will in horizontal continuous change in oscillation.When swaying cycle and the transverse direction at cavity 602 center of electronics is identical for cycle of oscillation of breaking, will be similar to resonant spring oscillator situation, there is resonance in electronics swaying, enlarges markedly its amplitude; Correspondingly, increase Torsional pendulum apparatus strength factor, the photon energy of radiation and each electronics will significantly increase in the number of photons of each radiation cycle of oscillation, strengthen X-ray radiation efficiency.
In the present embodiment, plasma channel is produced by the gas 4 in electric discharge ionization accelerator capillary 2 and Torsional pendulum apparatus capillary 3, which can be reused in the long duration, when selecting polythene material to make accelerator capillary 2 and Torsional pendulum apparatus capillary 3, by the inwall of electrion ablation capillary, form plasma channel.The utility model has that structure is simple, easy to operate, X-ray radiation efficiency is high, may be used for miniaturized X source.
Claims (7)
1. a laser plasma resonance body X source, it is characterized in that, described laser plasma resonance body X source comprises support (1), accelerator capillary (2), Torsional pendulum apparatus capillary (3), gas (4), electrion system (5), laser (6) and seed electrons bundle (7), accelerator capillary (2) and Torsional pendulum apparatus capillary (3) are arranged in support (1), the central shaft of the cylindric through hole of accelerator capillary (2) and Torsional pendulum apparatus capillary (3) is parallel to each other but does not overlap, No. 1 inflation duct (101) transversely arranged in support (1) is communicated with the air-filled pore in Torsional pendulum apparatus capillary (2) with accelerator capillary (2) respectively with No. 2 inflations duct (102), gas (4) is filled with in accelerator capillary (2) and Torsional pendulum apparatus capillary (3), the two ends of support (1) are respectively arranged with negative electrode (103) and positive electrode (104), electrion system (5) is by high voltage source (501), discharge resistance (502), current-limiting resistance (503), electric capacity (504), earthing device (505) and inductance (506) composition, electrion system (5) is arranged on the two ends of accelerator capillary (2) and Torsional pendulum apparatus capillary (3) by negative electrode (103) and positive electrode (104).
2. laser plasma resonance body X source according to claim 1, it is characterized in that, described accelerator capillary (2) and Torsional pendulum apparatus capillary (3) are made up of pottery or ruby or polythene material, and the shape of accelerator capillary (2) and Torsional pendulum apparatus capillary (3) is cylinder or cuboid.
3. laser plasma resonance body X source according to claim 1, it is characterized in that, described accelerator capillary (2) is identical with the pore size of Torsional pendulum apparatus capillary (3), and the aperture of accelerator capillary (2) and Torsional pendulum apparatus capillary (3) is 50 μm-500 μm.
4. laser plasma resonance body X source according to claim 1, is characterized in that, described support (1) is made up of acrylic glass, and the shape of support (1) is hollow cylindrical.
5. laser plasma resonance body X source according to claim 1, is characterized in that, the output voltage of described electrion system (5) is 0.3kV-5kV.
6. laser plasma resonance body X source according to claim 1, is characterized in that, the gas (4) in described accelerator capillary (2) and Torsional pendulum apparatus capillary (3) is hydrogen or helium.
7. laser plasma resonance body X source according to claim 1, is characterized in that, the electricity of described seed electrons bundle (7) is 0.1pC-1000pC, and energy is 1MeV-100MeV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420757254.3U CN204217195U (en) | 2014-12-07 | 2014-12-07 | Laser plasma resonance body X source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420757254.3U CN204217195U (en) | 2014-12-07 | 2014-12-07 | Laser plasma resonance body X source |
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| CN204217195U true CN204217195U (en) | 2015-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201420757254.3U Withdrawn - After Issue CN204217195U (en) | 2014-12-07 | 2014-12-07 | Laser plasma resonance body X source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104394642A (en) * | 2014-12-07 | 2015-03-04 | 湖南科技大学 | Laser plasma resonance X-ray source |
| CN106163075A (en) * | 2016-07-14 | 2016-11-23 | 中国科学院上海光学精密机械研究所 | A kind of clamping device of Puffer-type discharge capillary |
-
2014
- 2014-12-07 CN CN201420757254.3U patent/CN204217195U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104394642A (en) * | 2014-12-07 | 2015-03-04 | 湖南科技大学 | Laser plasma resonance X-ray source |
| CN104394642B (en) * | 2014-12-07 | 2017-03-08 | 湖南科技大学 | Laser plasma resonance body X source |
| CN106163075A (en) * | 2016-07-14 | 2016-11-23 | 中国科学院上海光学精密机械研究所 | A kind of clamping device of Puffer-type discharge capillary |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150318 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |