CN212379316U - Low-temperature sample rack with pitching rotation function based on GM refrigerator - Google Patents
Low-temperature sample rack with pitching rotation function based on GM refrigerator Download PDFInfo
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- CN212379316U CN212379316U CN202020211839.0U CN202020211839U CN212379316U CN 212379316 U CN212379316 U CN 212379316U CN 202020211839 U CN202020211839 U CN 202020211839U CN 212379316 U CN212379316 U CN 212379316U
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Abstract
The utility model provides a take low temperature sample frame of every single move rotation function based on GM refrigerator, including refrigerator, sample frame head, its characterized in that: the device also comprises an adapter, a rotating machine, a flexible shaft, an upper section transmission rod, a lower section transmission rod, a gear set, a worm and gear set and a sample table; the sample table is used for placing a sample and driving the sample to move; the adapter is provided with an external interface; the rotating machine is connected with the flexible shaft; the flexible shaft passes through the adapter through the external interface; the flexible shaft is connected with the upper-section transmission rod; the upper section transmission rod is connected with the lower section transmission rod; the lower section transmission rod is connected with the gear set; the gear set is connected with the worm gear set; the worm and gear set is connected with the sample table. The utility model has the advantages that: compact structure, sample platform can realize the every single move rotation under the extremely low temperature condition, and the motion of angle of pitch is smooth and easy in the super large temperature interval, has avoided the rotatory card pause problem that expend with heat and contract with cold and arouse.
Description
Technical Field
The utility model relates to an ultrahigh vacuum and ultra-low temperature field, in particular to take every single move rotation function's low temperature sample frame based on GM refrigerator.
Background
An angle-resolved photoelectron spectrometer system is called ARPES for short, and the photoelectric effect is utilized to research the electronic structure of a solid. The low-temperature sample holder is used as a measuring platform of a sample, is an important component module of an ARPES system, and provides an ultralow-temperature, multi-degree-of-freedom and nonmagnetic measuring environment for the sample. The low-temperature sample rack based on the GM refrigerator has natural advantages, does not need to consume liquid helium, and has low operation cost; the full-motor multi-degree-of-freedom motion can be realized, and the operation is convenient and fast; the device can change temperature rapidly and run stably for a long time, and is an ideal choice for ARPES experimenters.
However, the design difficulty of the low-temperature sample holder based on the GM refrigerator mainly has the following four aspects; 1. the design that the temperature of the sample stage reaches a liquid helium temperature zone (the temperature is less than 4K) is realized; 2. on the premise of meeting the requirements of ultrahigh vacuum and no magnetism, the sample table realizes the pitching rotation driven by a vacuum outer motor; 4. the sample position of the sample frame in the ultra-large temperature zone can not change along with the temperature.
Therefore, the market urgently needs a low-temperature sample rack with pitching rotation based on a GM refrigerator, which can be compatible with an ultrahigh vacuum environment and can provide a low-temperature to liquid helium temperature region, and the pitching rotation is smooth in the change range of the ultra-large temperature region.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model discloses a every single move rotation low temperature sample frame based on GM refrigerator, the technical scheme of the utility model is implemented like this:
the utility model provides a every single move rotation cryogenic sample frame based on GM refrigerator, includes refrigerator, sample frame head, the refrigerator includes one-level cold head and second grade cold head, the second grade cold head is connected one-level cold head, its characterized in that: the device also comprises an adapter, a rotating machine, a flexible shaft, an upper section transmission rod, a lower section transmission rod, a gear set, a worm and gear set and a sample table; the sample table is used for placing a sample; the adapter is provided with an external interface; the rotating machine is connected with the flexible shaft; the flexible shaft passes through the adapter through the external interface; the flexible shaft is connected with the upper-section transmission rod; the upper section transmission rod is connected with the lower section transmission rod; the lower section transmission rod is connected with the gear set; the gear set is connected with the worm gear set; the worm and gear set is connected with the sample table.
Preferably, the heat-conducting extension rod is further included; one end of the heat conduction extension rod is arranged on the second-stage cold head, and the other end of the heat conduction extension rod is connected with the sample stage.
Preferably, the heat-conducting extension rod is connected with the sample table through a braid; the material of the braid is selected from one or more of copper, gold or silver.
Preferably, the upper section transmission rod and the lower section transmission rod are connected through a coupler.
Preferably, a sleeve is further included; the sleeve is connected with the primary cold head; the sleeve wraps the secondary cold head.
Preferably, the device further comprises a hoop support; the hoop support is arranged on the upper section transmission rod; the clamp support is sleeved on the sleeve.
Preferably, a support plate is further included; the supporting plate is fixed on the lower section transmission shaft through a bearing seat; the sample stage comprises a triangular support, a shielding cover door, a shielding baffle and a sample holder; a measuring hole is formed in the shield cover door; the shielding cover door is arranged on the shielding cover, and the shielding baffle is arranged on the shielding cover; the shielding baffle is arranged on the shielding cover; the sample holder and the triangular supports are arranged inside the shielding case; the sample support is connected with the three-leg support.
Preferably, a gold column is arranged on the sample stage.
Preferably, the sample stage is provided with an accessory interface.
By implementing the technical scheme of the utility model, the technical problems that the rotation of multiple degrees of freedom can not be realized on the premise that the sample holder is extremely low in temperature based on a GM refrigerator, the motion of each degree of freedom is independent, the interference is avoided, and the motion of the pitch angle in the change range of an ultra-large temperature zone is smooth in the prior art can be solved; implement the technical scheme of the utility model, can realize based on GM refrigerator can realize that multi freedom is rotatory and each freedom between the motion mutual independence under the very microthermal prerequisite of sample support, not disturbed and the smooth and easy technological effect of motion at the super large warm area variation within range angle of pitch.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an overall structure diagram of a pitching rotation low-temperature sample holder based on a GM refrigerator;
FIG. 2 is a schematic diagram of a transmission structure of a pitching rotation low-temperature sample rack based on a GM refrigerator;
FIG. 3 is a schematic diagram of a sample stage of a pitching rotation low-temperature sample holder based on a GM refrigerator;
fig. 4 is a schematic view of the head of a sample holder of a pitch-rotation cryogenic sample holder based on a GM refrigerator.
In the above drawings, the reference numerals denote:
1-a refrigerator; 2-an adapter; 3-a sample stage; 4-a rotary machine; 5-a flexible shaft; 6-upper section transmission rod; 7-a lower section transmission rod; an 8-gear set; 9-worm gear and worm group; 10-a coupler; 11-clamp support; 12-sample holder; 13-a shield; 14-a shield door; 15-a shielding baffle; 16-gold column.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
For convenience of description, Z is the opposite direction of gravity, X and Y are X, Y directions of a spatial rectangular coordinate system established by taking the Z axis as a standard, and R1 is the included angle between the cold head and the horizontal plane.
In a specific embodiment, as shown in fig. 1 to 4, a pitching rotation low-temperature sample holder based on a GM refrigerator (1) comprises a refrigerator (1) and a sample holder head, wherein the refrigerator comprises a primary cold head and a secondary cold head, the secondary cold head is connected with the primary cold head, and the pitching rotation low-temperature sample holder is characterized in that: the device also comprises an adapter (2), a rotating machine (4), a flexible shaft (5), an upper section transmission rod (6), a lower section transmission rod (7), a gear set (8), a worm and gear set (9) and a sample table (3); the sample table (3) is used for placing a sample; an external interface is arranged on the adapter (2); the rotating machine (4) is connected with the flexible shaft (5); the flexible shaft (5) passes through the adapter (2) through the external interface; the flexible shaft (5) is connected with the upper-section transmission rod (6); the upper section transmission rod (6) is connected with the lower section transmission rod (7); the lower section transmission rod (7) is connected with the gear set (8); the gear set (8) is connected with the worm gear set (9); the worm gear and worm group (9) is connected with the sample table (3).
In this particular embodiment, in a rectangular spatial coordinate system, the adapter (2) serves on the one hand to isolate the vacuum environment from the conventional environment and on the other hand to provide external signals and a machine to move the conductive interface; the rotating machine (4) is used for providing motion power; the flexible shaft (5) is used for connecting the rotating machine (4) and the upper-section transmission rod (6), changing the movement direction and changing the movement direction into the direction suitable for the upper-section transmission rod (6), so that the problems of angle deviation and non-concentricity of the transmission shaft between the conventional environment and the vacuum environment are solved, and stainless steel is generally adopted as a material; external motion is generated by a rotating machine (4), the motion is transmitted into a vacuum environment from a conventional environment by a flexible shaft (5), then an upper section transmission rod (6) is driven to move, the upper section transmission rod (6) drives a lower section transmission rod (7) to move, the rotation amplitude is converted into a range suitable for the motion of the sample table (3) through a gear set (8), finally the gear set (8) drives a worm gear set (9) to move so that the sample table (3) generates motion on a pitch angle, and the directions of X, Y, Z and R1 are realized by the arrangement of an external mobile platform or a sample rack; the transmission rod generally adopts molybdenum or titanium as a material, has good toughness and has small deformation amount in the process of expansion with heat and contraction with cold; the gear set (8) is a straight gear set (8), the driving gear has certain movement allowance in the axial direction, so that the pitch angle transmission module is not influenced by thermal expansion and cold contraction in a temperature changing environment of 4K-350K of the sample rack, and meanwhile, the motion in the directions of X, Y, Z and R1 is not influenced, and the sample rack is independent of the sample rack; through the interaction among the modules, the GM refrigerator (1) can realize multi-degree-of-freedom rotation on the premise that the sample holder (12) is extremely low in temperature, the motion of each degree of freedom is independent, the GM refrigerator is not interfered, and the motion of the pitch angle in the change range of the ultra-large temperature region is smooth.
In a preferred embodiment, the heat conducting extension rod is further included; one end of the heat conduction extension rod is arranged on the second-stage cold head, and the other end of the heat conduction extension rod is connected with the sample table (3).
In this kind of preferred embodiment, the heat conduction extension rod is used for adapting to different experimental demands, is applicable to the experimental demand under the different condition, according to the experimental demand of difference, only need to change corresponding heat conduction extension rod can and need not to revise the cold head again.
In a preferred embodiment, the heat-conducting extension rod is connected with the sample table (3) through a braid; the material of the braid is selected from one or more of copper, gold or silver.
In the preferred embodiment, the braid is formed by twisting a plurality of metal wires and is in a braided shape, and the heat conducting extension rod cannot or cannot directly contact the sample table (3) in space, so that the braid is used for connecting the heat conducting extension rod with the sample table (3), one end of the braid is connected with one end of the heat conducting extension rod, and the other end of the braid is connected with the sample table (3), so that heat is led out; the material of the braid is, on the one hand, a good thermal conductivity and, on the other hand, a good softness, and is therefore copper, gold or silver, among other materials having the above-mentioned properties.
In a preferred embodiment, as shown in fig. 2, the upper transmission rod (6) and the lower transmission rod (7) are connected by a coupling (10).
In the preferred embodiment, a coupling (10) is used to avoid the problem of non-concentric connection between the upper transmission rod (6) and the lower transmission rod (7) during movement, so that the rotation is smooth.
In a preferred embodiment, further comprising a sleeve; the sleeve is connected with the primary cold head; the sleeve wraps the secondary cold head; also comprises a hoop support (11); the hoop support (11) is arranged on the upper section transmission rod (6); the hoop support (11) is sleeved on the sleeve.
In the preferred embodiment, the sleeve is arranged on the primary cold head through the mounting hole arranged on the primary cold head, so that the sleeve provides support for the sample table (3) on one hand, and is used as a cold screen to conduct the cold energy of the primary cold head to all the cold screens on the other hand; the clamp support (11) has two functions, on one hand, provides enough strength support for the transmission rod, facilitates concentric adjustment, and on the other hand, avoids the release between the transmission rod and the sleeve, and reduces the heat conduction between the sleeve and a component with the transmission function.
In a preferred embodiment, further comprises a support plate; the supporting plate is fixed on the lower section transmission shaft through a bearing seat.
In the preferred embodiment, the supporting plate is used for fixing the sample table (3) and other devices, so that intensive management is realized and space is saved.
In a preferred embodiment, the sample stage (3) comprises a triangular support, a shield cover (13), a shield cover door (14), a shield baffle (15) and a sample holder (12); a measuring hole is formed in the shield cover door (14); the shield cover door (14) is installed on the shield cover (13), and the shield baffle (15) is installed on the shield cover (13); the shielding baffle (15) is arranged on the shielding cover (13); the sample holder (12) and the triangular supports are arranged inside the shielding case (13); the sample holder (12) is connected with the tripod support.
In the preferred embodiment, the shielding cover (13), the shielding cover door (14) and the shielding baffle (15) are used for isolating heat radiation, and a gold-plated oxygen-free copper sheet is generally used, and other materials which can play a good heat isolation effect can also be used; a measuring hole arranged on the shield cover door (14) is opposite to the sample position of the sample support (12); when the device is used, a sample is placed on the sample support (12), the shield cover door (14) is opened, the sample support (12) is placed on the three-leg support, then the shield cover door (14) is closed, the sample at the moment is over against the measuring hole, and in the formal experiment process, the range of the sample exposed to heat radiation can be reduced as far as possible.
In a preferred embodiment, as shown in fig. 4, a gold column (16) is arranged on the sample stage (3).
In the preferred embodiment, the gold pillar (16) is made of pure gold, and the gold pillar (16) is used for the Fermi level calibration and is used as a reference sample for the measurement of an actual sample, so that the use is convenient.
In a preferred embodiment, the sample table (3) is provided with an attachment interface.
In the preferred embodiment, an accessory interface is arranged on the sample table (3), the accessory interface can be used for expanding equipment and installing modules such as a sample parking table, a high-temperature heating table and a sample cleavage table.
In a preferred embodiment, as shown in fig. 3, the shield stop (15) is inclined to the shield (13) and the shield door (14).
In the preferred embodiment, the shielding baffle (15) is inclined to the shield (13) and the shield door (14), and the inclined arrangement ensures that the sample holder (12) is always within the protection range of the shielding baffle (15) during the movement of the sample holder (12), thereby isolating the heat radiation.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the present invention, and that any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (10)
1. The utility model provides a take low temperature sample frame of every single move rotation function based on GM refrigerator, includes refrigerator, sample frame head, the refrigerator includes one-level cold head and second grade cold head, the second grade cold head is connected one-level cold head, its characterized in that: the device also comprises an adapter, a rotating machine, a flexible shaft, an upper section transmission rod, a lower section transmission rod, a gear set, a worm and gear set and a sample table;
the sample table is used for placing a sample;
the adapter is provided with an external interface;
the rotating machine is connected with the flexible shaft; the flexible shaft passes through the adapter through the external interface; the flexible shaft is connected with the upper-section transmission rod; the upper section transmission rod is connected with the lower section transmission rod; the lower section transmission rod is connected with the gear set; the upper section transmission rod is connected with the lower section transmission rod through a coupler; the gear set is connected with the worm gear set; the worm and gear set is connected with the sample table.
2. A GM refrigerator based cryo-sample holder with pitch and roll functionality according to claim 1 wherein: the heat conduction extension rod is also included; one end of the heat conduction extension rod is arranged on the second-stage cold head, and the other end of the heat conduction extension rod is connected with the sample stage.
3. A GM refrigerator based cryo-sample holder with pitch and roll functionality according to claim 2 wherein: the heat conduction extension rod is connected with the sample table through a flexible braid.
4. A GM refrigerator based cryo-sample holder with pitch and roll functionality according to claim 1 wherein: also includes a sleeve; the sleeve is connected with the primary cold head; the sleeve wraps the secondary cold head.
5. A GM refrigerator based cryogenic sample holder with pitch and roll functionality according to claim 4, wherein: the device also comprises a hoop support; the hoop support is used for supporting the upper section transmission rod; the clamp support is sleeved on the sleeve.
6. A GM refrigerator based cryo-sample holder with pitch and roll functionality according to claim 3 wherein: the device also comprises a supporting plate; the supporting plate is fixed on the lower section transmission shaft through a bearing seat.
7. A GM refrigerator based cryogenic sample holder with pitch and roll functionality according to any of claims 1 to 6, wherein: the sample stage comprises a triangular support, a shielding cover door, a shielding baffle and a sample holder;
the shielding cover door is provided with a light through hole;
the shielding baffle is arranged on the shielding cover; the shielding baffle is arranged on the shielding cover; the sample holder and the triangular supports are arranged inside the shielding case; the sample support is connected with the triangular support.
8. The GM refrigerator based cryogenic sample holder with pitch and roll functionality as claimed in claim 7, wherein: and a gold column is arranged on the sample table.
9. The GM refrigerator based cryogenic sample holder with pitch and roll functionality as claimed in claim 7, wherein: the sample stage is provided with an accessory interface.
10. The GM refrigerator based cryogenic sample holder with pitch and roll functionality as claimed in claim 7, wherein: the shield baffle is inclined to the shield and the shield door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020211839.0U CN212379316U (en) | 2020-02-26 | 2020-02-26 | Low-temperature sample rack with pitching rotation function based on GM refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020211839.0U CN212379316U (en) | 2020-02-26 | 2020-02-26 | Low-temperature sample rack with pitching rotation function based on GM refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212379316U true CN212379316U (en) | 2021-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020211839.0U Active CN212379316U (en) | 2020-02-26 | 2020-02-26 | Low-temperature sample rack with pitching rotation function based on GM refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212379316U (en) |
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2020
- 2020-02-26 CN CN202020211839.0U patent/CN212379316U/en active Active
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