CN102023268A - Device and method for measuring quench propagation velocity of superconducting coil - Google Patents
Device and method for measuring quench propagation velocity of superconducting coil Download PDFInfo
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- CN102023268A CN102023268A CN2010105401382A CN201010540138A CN102023268A CN 102023268 A CN102023268 A CN 102023268A CN 2010105401382 A CN2010105401382 A CN 2010105401382A CN 201010540138 A CN201010540138 A CN 201010540138A CN 102023268 A CN102023268 A CN 102023268A
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Abstract
The invention provides a device for measuring quench propagation velocity of a superconducting coil, which is characterized in that a certain background field is achieved through a back surface field superconducting magnet (4); two low-temperature work environments are provided through a refrigerator (2) and low-temperature liquid; the superconducting coil (5) to be measured is arranged in a low-temperature container (8); and the superconducting coil (5) to be measured comprises a sparse winding part (15) of the superconducting coil to be measured and a compact winding part (16) of the superconducting coil to be measured which are respectively used for measuring the quench propagation velocity of the superconducting coil (5) to be measured in a wire direction and the quench propagation velocity of the superconducting coil (5) to be measured in a radial direction. By using the device, the measurement of the quench propagation velocity of the superconducting coil in a two-dimensional direction is realized, and the measurement is precise.
Description
Technical field
The present invention relates to a kind of device and measuring method thereof that is used for MEASUREMENT IN SUPERCONDUCTOR quench propagation speed, particularly a kind of device and measuring method thereof that is used to measure superconducting coil quench propagation speed.
Background technology
The continuous development of superconductor and cryogenic technique makes superconducting magnet in electric power, medical science, industrial treatment, Science Explorations and application of military field more and more widely, the demand of the every modernization construction of China is just constantly satisfied in highfield superconducting magnet science and technology development and application, has improved the performance and the precision of various equipments greatly.
Superconducting magnet takes multiple stabilization method to improve the stability of magnet operation in the process of design and manufacturing usually.But, because the influence of factors such as flux jumping, coil vibration, guidewire movement, epoxy impregnation burst apart, heat is disturbed, electric power output voltage ripple is arranged, may cause the local temperature rising of superconductor and the normal state zone occur, the quench phenomenon promptly takes place.After the local quench of superconductor, the normal state zone may be shunk and be returned to superconducting state gradually, also may continue to enlarge and cause quench propagation, and this is closely related with triggering energy, condition of work and cooler environment.Electric current during the superconducting magnet operation is very big, if the superconducting magnet quench will be followed a series of problems such as superpotential and heating take place, may cause the puncture of magnet insulating material, serious local temperature rise then can cause wire insulation and coil connectors to be melted, thereby causes the magnet irregular operating even burn.Therefore, the electrical property of quench (normal region) propagation and thermal behavior are major issues must considering during superconducting magnet is used.The quench propagation characteristic comprises that mainly quench propagation speed and minimum quench can wait, and is the very important parameter of judging superconductor stability, and the accurate test of quench propagation characteristic provides the important parameters foundation for the design and the quench protection control of superconducting magnet.
In general, the quench propagation speed of high-temperature superconductor is the cm/s magnitude, than slow two to three magnitudes of cryogenic superconductor.This mainly is because high temperature superconducting materia has high thermal capacity and a higher critical temperature, and the stability of high-temperature superconductor is better than cryogenic superconductor to a certain extent.But then, too slow if propagate the normal region, then superconductor is local can form focus, and its heat only spreads in very little scope, if quench protection is dealt with improperly, magnet does not cause permanent breaking-up because of heat has snap-out release to burn.Therefore, no matter during the employ superconductor, be necessary to measure the quench propagation speed of superconductor, i.e. the velocity of propagation of the Joule heat of local normal region (band) material along the line.Have only quench behavior that enough understandings are arranged, grasp the quench propagation characteristic of superconductor, could establish solid guarantee, improve the stability and the security of superconducting magnet operation for superconducting magnet stability Design and quench detection and protection to used superconductor.
The stability of highfield superconducting magnet operation is important, the indispensable engineering objective that the superconductive science instrument uses, and the quench propagation speed of superconductor is one of key factor of decision superconducting magnet stability.Therefore, need accurately measure the quench propagation speed and the minimum quench that obtain superconductor by the fc-specific test FC device can size.The apparatus and method of present disclosed measurement quench propagation speed mostly are greatly measures one section superconducting line (band) material sample, and just measures along the one dimension quench propagation speed on the lead direction.And superconducting line (band) material all will turn to superconducting coil formation superconducting magnet in the practical application, and quench propagation is also propagated to direction along the footpath (horizontal stroke) of line (band) material except along the lead direction of superconducting line (band) material is propagated.Therefore have only the actual superconducting coil of simulation to carry out the measurement of the quench propagation speed on the two-dimensional directional even on the three-dimensional, more the quench propagation characteristic of Accurate Analysis superconducting magnet after the match at the back of the body.
Summary of the invention
The objective of the invention is to overcome existing measurement mechanism mostly is the short sample of measuring null field next section superconducting line or band, can only measures along the shortcoming of the one dimension quench propagation speed on the lead direction, a kind of measurement mechanism of quench propagation speed is provided, this device has the refrigeration machine refrigeration, can measure the quench propagation speed of superconducting coil on two-dimensional directional under background magnetic field.This device not only can satisfy measures the quench propagation velocity magnitude of various superconducting coils under background magnetic field, and can realize that directly conduction cooling and cryogenic liquid soak two kinds of low-temperature working environment of cooling, and the quench propagation velocity survey is more accurate.
The device that the present invention measures superconducting coil quench propagation speed comprises Dewar type container, refrigeration machine, back of the body field superconducting magnet, tested superconducting coil, low-temperature (low temperature) vessel, heater strip, current feed, measuring lead wire, conduction cooling band, woven hose, muffler and epoxy pull bar.
A back of the body superconducting magnet is installed in the Dewar type container of the present invention, a back of the body superconducting magnet is a high-temperature superconducting magnet, by refrigeration machine one-level cold head refrigeration, a back of the body superconducting magnet can be used as the cold screen of low-temperature (low temperature) vessel to a back of the body superconducting magnet, has reduced the making and the installation of the cold screen of measurement mechanism by the conduction cooling band.Refrigeration machine is installed in the center, upper surface of Dewar type container, a back of the body superconducting magnet top is connected with the upper surface of Dewar type container by the epoxy pull bar, produce required background magnetic field for a back of the body superconducting magnet power supply by the current feed of a back of the body superconducting magnet, magnetic field intensity can reach 1-5T.
Low-temperature (low temperature) vessel of the present invention is connected the lower end of refrigeration machine secondary cold head, and tested superconducting coil is installed in low-temperature (low temperature) vessel inside.If in vacuum environment, can make by the refrigeration machine refrigeration to reach needed low temperature in the low-temperature (low temperature) vessel when tested superconducting coil is worked.If tested superconducting coil is immersed in the cryogenic liquid environment when working, can import cryogenic liquid to low-temperature (low temperature) vessel by woven hose.If tested superconducting coil is high temperature superconductor coil then imports liquid nitrogen to low-temperature (low temperature) vessel, if tested superconducting coil is the low-temperature superconducting coil then imports liquid helium to low-temperature (low temperature) vessel that liquid vapour is discharged by muffler.Woven hose and muffler are connected with the low-temperature (low temperature) vessel upper cover plate in low-temperature (low temperature) vessel upper end symmetric arrangement.Also be connected to tested superconducting coil current lead-in wire and tested superconducting coil measuring lead wire on the upper cover plate of low-temperature (low temperature) vessel.
The tested superconducting coil of the present invention comprises that tested superconducting coil is thin close around part around part and tested superconducting coil, dredges on part and the close lead between part of tested superconducting coil at tested superconducting coil and twines heater strip.Heater strip is a manganese-copper filament, and resistance is 10-50 ohm.Heater strip is powered by pulse current source.Tested superconducting coil connects a pair of tested superconducting coil current lead-in wire, by DC power supply.Dredge at tested superconducting coil and on the lead of part, to be welded with a pair of dredging around part measuring lead wire one and a pair of dredging around part measuring lead wire two; Tested superconducting coil close around the part lead on be welded with a pair of close around part measuring lead wire one and a pair of close around part measuring lead wire two.Dredge around part measuring lead wire one and to dredge around part measuring lead wire two be L along the spacing of lead direction
1, every pair of two lead-in wires dredging around the part measuring lead wire are L along the distance on the lead direction
2Close around part measuring lead wire one and close be S around part measuring lead wire two along the spacing on the lead direction.Every pair of two lead-in wires dredging around the part measuring lead wire are d along the distance on the lead direction.The diameter of wire of tested superconducting coil or width are d.Measure along the quench propagation speed on the conductor length direction around the part measuring lead wire by two couple of tested superconducting coil is thin, measure along lead quench propagation speed in the radial direction around the part measuring lead wire by two couple of tested superconducting coil is close.
The present invention be more accurate measurement along lead quench propagation speed in the radial direction, tested superconducting coil diameter is greater than the 40-60 of the diameter of wire of tested superconducting coil doubly.The peripheral parcel of tested superconducting coil low temperature epoxy glue is to keep the insulation effect of superconducting coil, and the thickness of low temperature epoxy glue is 5-10mm.
Two couple of the tested superconducting coil of the present invention dredges around the part measuring lead wire and closely is connected the multi-channel data acquisition instrument around the part measuring lead wire with two pairs, by the multi-channel data acquisition instrument voltage swing in every pair of per moment of measuring lead wire of measurement.Adjacent with the heater strip a pair of time of dredging the 0.5 times of maximum voltage that produces around the part measuring lead wire is designated as t1 with another to the difference of dredging around time of 0.5 times of maximum voltage of part measuring lead wire generation.The time of adjacent with the heater strip a pair of close 0.5 times of maximum voltage that produces around the part measuring lead wire is designated as t2 with another difference to the time of close 0.5 times of maximum voltage around the generation of part measuring lead wire.
Measuring method sequence of steps of the present invention is:
1. the background magnetic field of forming a certain size at first for the energising of background superconducting magnet is given tested superconducting coil energising under background magnetic field, and size of current equals the critical electric current value of 0.8-0.95 times of superconducting line (band) material;
2. to the heater strip energising, after producing certain heat, trigger tested superconducting coil quench;
3. carry out voltage measurement by the multi-channel data acquisition instrument, note and dredge, two mistimings note t1 around part measuring lead wire one and the time of dredging the 0.5 times of maximum voltage that produces respectively around part measuring lead wire two.Note the time of two pairs of close 0.5 times of maximum voltages that produces respectively around the part measuring lead wire in addition, two mistimings are designated as t2;
4. be (L1+L2)/t1 by dredging, be (2d+S)/t2 around part measuring lead wire one and close measuring along the quench propagation speed of lead tested superconducting coil (5) in the radial direction around part measuring lead wire two by close around part measuring lead wire one and thin measuring along the quench propagation speed of the tested superconducting coil on the lead direction around part measuring lead wire two.
This measurement mechanism has the refrigeration machine refrigeration, can realize a certain size background magnetic field, can realize that also vacuum low-temperature environment and cryogenic liquid soak environment and measure high temperature superconductor coil or low-temperature superconducting coil down.Can not only measure the quench propagation speed on the lead direction, also can measure the quench propagation speed of lead radial direction, measure comparatively accurate.
Description of drawings
Fig. 1 measurement mechanism synoptic diagram is among the figure: 1 Dewar type container, 2 refrigeration machines, 3 epoxy pull bars, 4 back of the body superconducting magnet, 5 tested superconducting coils, 6 conduction cooling bands, 7 back ofs the body superconducting magnet current feed, 8 low-temperature (low temperature) vessels, 9 low temperature epoxy glues, 10 heater strips, 11 woven hoses, 12 mufflers, 13 tested superconducting coil current lead-in wires, 14 tested superconducting coil measuring lead wire;
The tested superconducting coil synoptic diagram of Fig. 2, among the figure: 15 tested superconducting coils are dredged around part, 16 tested superconducting coils are close around part, 17 dredge around part measuring lead wire one, 18 is thin close close around part measuring lead wire two around part measuring lead wire one, 20 around part measuring lead wire two, 19,21 tested superconducting coil power supplys, 22 multi-channel data acquisition instrument.
Embodiment
Further specify the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the upper cover plate of Dewar type container 1 is installed refrigeration machine 2, and a back of the body superconducting magnet 4 is connected with upper cover plate by epoxy pull bar 3, and a back of the body superconducting magnet 4 is connected with the one-level cold head of refrigeration machine 2 by conduction cooling band 6.Low-temperature (low temperature) vessel 8 is connected with cold-producing medium 2 lower ends, and tested superconducting coil 5 is installed in the low-temperature (low temperature) vessel 8, and the appearance of tested superconducting coil 5 scribbles low temperature epoxy glue 9, and thickness is 5-10mm.If in vacuum environment, can make by refrigeration machine 2 refrigeration to reach needed low temperature in the low-temperature (low temperature) vessel 8 when tested superconducting coil 5 is worked.If tested superconducting coil 5 is immersed in the cryogenic liquid environment when working, can be by woven hose 11 to low-temperature (low temperature) vessel input cryogenic liquid.If tested superconducting coil 5 is high temperature superconductor coil then imports liquid nitrogen to low-temperature (low temperature) vessel, if tested superconducting coil 5 is the low-temperature superconducting coil then imports liquid helium to low-temperature (low temperature) vessel that liquid vapour is discharged by muffler 12.Woven hose 11 and muffler 12 are connected with low-temperature (low temperature) vessel 8 upper cover plates in low-temperature (low temperature) vessel 8 upper end symmetric arrangement.Be connected to tested superconducting coil current lead-in wire 13 and tested superconducting coil measuring lead wire 14 on the upper cover plate of low-temperature (low temperature) vessel.After Dewar type container 1 vacuumizes, open refrigeration machine 2, when reaching required working temperature environment, required background magnetic field is provided for 4 energisings of a back of the body superconducting magnet by a back of the body superconducting magnet current feed 7, and then pass through tested superconducting coil current lead-in wire 13 and give tested superconducting coil 5 energisings, promote blood circulation towards electric current for heater strip 10 by pulse current source, after producing certain heat and triggering tested superconducting coil 5 quench, utilize a back of the body data that superconducting coil measuring lead wire 14 is transmitted back can measure the quench propagation speed of the tested superconducting coil 5 under the background magnetic field of 1-5T size.
As shown in Figure 2, tested superconducting coil 5 comprises that tested superconducting coil is thin close around part 16 around part 15 and tested superconducting coil, dredges at tested superconducting coil and twine heater strip 10 on part 15 and the close lead between part 16 of tested superconducting coil.Heater strip 10 is a manganese-copper filament, and resistance is 10-50 ohm.Heater strip 10 is powered by pulse current source.Tested superconducting coil 5 connects tested superconducting coil current lead-in wire 13, by tested superconducting coil power supply 21 power supplies.The spacing of dredging around the lead upper edge of part 15 lead direction at tested superconducting coil is L
1Weld two pairs and dredge around the part measuring lead wire, be respectively and dredge around part measuring lead wire 1 and thin around part measuring lead wire 2 18, every pair is dredged around the part measuring lead wire is L along the distance on the lead direction
2Close close along welding on the adjacent two circle leads of being close at tested superconducting coil around the part measuring lead wire around part 16, close around totally two pairs of part measuring lead wire, be respectively close around part measuring lead wire 1 and close close around 2 20, two pairs of part measuring lead wire be S around the part measuring lead wire along the distance on the lead direction.The diameter of wire of tested superconducting coil 5 or width are d.Measure along the quench propagation speed on the conductor length direction around the part measuring lead wire by two couple of tested superconducting coil 5 is thin, measure along lead quench propagation speed in the radial direction around the part measuring lead wire by two couple of tested superconducting coil 5 is close.
Since along the quench propagation speed on the lead direction much larger than along lead quench propagation speed in the radial direction, therefore be more accurate measurement along lead quench propagation speed in the radial direction, tested superconducting coil 5 diameters are greater than 40-60 times of the diameter of wire of tested superconducting coil 5.
Dredge around part measuring lead wire 1 and thin around part measuring lead wire 2 18, closely all be connected around part measuring lead wire 2 20 with close with multi-channel data acquisition instrument 22 around part measuring lead wire 1, multi-channel data acquisition instrument 22 can be the data collecting card of keithley2182 voltage table or NI company, measures the voltage swing in every pair of per moment of measuring lead wire by multi-channel data acquisition instrument 22.Adjacent with the heater strip 10 a pair of time of dredging the 0.5 times of maximum voltage that produces around part measuring lead wire 2 18 is designated as t1 with another to the difference of dredging around time of 0.5 times of maximum voltage of part measuring lead wire one 17 generations.The time of adjacent with the heater strip 10 a pair of close 0.5 times of maximum voltage that produces around part measuring lead wire 1 is designated as t2 with another difference to the time of close 0.5 times of maximum voltage around 2 20 generations of part measuring lead wire.Quench propagation speed along the tested superconducting coil 5 on the lead direction is (L so
1+ L
2)/t1 is (2d+S)/t2 along the quench propagation speed of lead tested superconducting coil 5 in the radial direction.
Measuring method of the present invention is at first to give tested superconducting coil 5 energisings under background magnetic field, and size of current equals the critical electric current value of 0.8～0.95 times of superconducting line (band) material.Promote blood circulation towards electric current for heater strip 10, after producing certain heat, trigger tested superconducting coil 5 quench, carry out voltage measurement by multi-channel data acquisition instrument 22, note and dredge, with two mistimings note t1 around part measuring lead wire 1 and the time of dredging the 0.5 times of maximum voltage that produces respectively around part measuring lead wire 2 18.Note close time in addition, two mistimings are designated as t2 around part measuring lead wire 1 and the close 0.5 times of maximum voltage that produces respectively around part measuring lead wire 2 20.The quench propagation speed along the tested superconducting coil on the lead direction that measures so is (L
1+ L
2)/t1 is (2d+S)/t2 along the quench propagation speed of lead tested superconducting coil in the radial direction.
Claims (8)
1. a device of measuring superconducting coil quench propagation speed is characterized in that described device comprises Dewar type container (1), refrigeration machine (2), epoxy pull bar (3), a back of the body superconducting magnet (4), tested superconducting coil (5), conduction cooling band (6), low-temperature (low temperature) vessel (8), woven hose (11) and muffler (12); A back of the body superconducting magnet (4) is installed in Dewar type container (1), a back of the body superconducting magnet (4) is by the one-level cold head conduction refrigeration of conduction cooling band (6) by refrigeration machine (2), refrigeration machine (2) is installed in the center, upper surface of Dewar type container (1), and back of the body superconducting magnet (a 4) top is connected with the upper surface of Dewar type container (1) by epoxy pull bar (3); Low-temperature (low temperature) vessel (8) is connected the lower end of refrigeration machine (2) secondary cold head; Tested superconducting coil (5) is installed in low-temperature (low temperature) vessel (8) inside; Woven hose (11) and muffler (12) are connected with low-temperature (low temperature) vessel (8) upper cover plate in low-temperature (low temperature) vessel (8) upper end symmetric arrangement.Be connected to tested superconducting coil current lead-in wire (13) and tested superconducting coil measuring lead wire (14) on the upper cover plate of low-temperature (low temperature) vessel (8).
2. according to the device of the described measurement superconducting coil of claim 1 quench propagation speed, it is characterized in that described tested superconducting coil (5) comprises that tested superconducting coil is thin close around part (16) around part (15) and tested superconducting coil, dredges around part (15) and tested superconducting coil close around partly twining heater strip (10) on the lead between (16) at tested superconducting coil.
3. according to the device of the described measurement superconducting coil of claim 2 quench propagation speed, it is characterized in that described heater strip (10) is a manganese-copper filament, the resistance of heater strip (10) is 10-50 ohm.
4. according to the device of the described measurement superconducting coil of claim 1 quench propagation speed, it is 5-10mm low temperature epoxy glue (9) that the appearance that it is characterized in that described tested superconducting coil (5) scribbles thickness.
5. according to the device of the described measurement superconducting coil of claim 1 quench propagation speed, it is characterized in that the diameter of described tested superconducting coil (5) is greater than 40-60 times of the diameter of wire of tested superconducting coil (5).
6. according to the device of the described measurement superconducting coil of claim 1 quench propagation speed, it is characterized in that, when tested superconducting coil (5) is worked, be in the vacuum environment, directly freeze, make in the low-temperature (low temperature) vessel (8) to reach needed low temperature by refrigeration machine (2) secondary cold head; When tested superconducting coil (5) is worked, be immersed in the cryogenic liquid environment, in low-temperature (low temperature) vessel (8), import cryogenic liquid by woven hose (11); If tested superconducting coil (5) is a then input liquid nitrogen in low-temperature (low temperature) vessel (8) of high temperature superconductor coil, if tested superconducting coil (5) is the low-temperature superconducting coil then imports liquid helium that in low-temperature (low temperature) vessel (8) liquid vapour is discharged by muffler (12).
7. according to the device of the described measurement superconducting coil of claim 1 quench propagation speed, it is characterized in that, dredge at tested superconducting coil and on the lead of part (15), be welded with a pair of dredging around part measuring lead wire one (17) and a pair of dredging around part measuring lead wire two (18); Tested superconducting coil close around the part (16) lead on be welded with a pair of close around part measuring lead wire one (19) and a pair of close around part measuring lead wire two (20); Dredge around part measuring lead wire one (17) and thin be L around part measuring lead wire two (18) along the spacing of lead direction
1, every pair of two lead-in wires dredging around the part measuring lead wire are L along the distance on the lead direction
2Close around part measuring lead wire one (19) and close be S around part measuring lead wire two (20) along the spacing on the lead direction; Every pair of two lead-in wires dredging around the part measuring lead wire are d along the distance on the lead direction; The diameter of wire of tested superconducting coil or width are d.
8. according to the method for the described measurement superconducting coil of claim 1 quench propagation speed, it is characterized in that the sequence of steps of measuring method is:
1. at first give tested superconducting coil (5) energising under background magnetic field, size of current equals the critical electric current value of 0.8～0.95 times of superconducting wire or band;
Promote blood circulation towards electric current 2. for heater strip (10), after producing certain heat, trigger tested superconducting coil (5) quench;
3. carry out voltage measurement by multi-channel data acquisition instrument (22), note and dredge, two mistimings are remembered t1 around part measuring lead wire one (17) and time of dredging the 0.5 times of maximum voltage that produces respectively around part measuring lead wire two (18); Note close time in addition, two mistimings are designated as t2 around part measuring lead wire one (19) and the close 0.5 times of maximum voltage that produces respectively around part measuring lead wire two (20);
4. be (L by dredging around part measuring lead wire one (17) and thin measuring along the quench propagation speed of the tested superconducting coil (5) on the lead direction around part measuring lead wire two (18)
1+ L
2)/t1 is (2d+S)/t2 by close around part measuring lead wire one (19) and close measuring along the quench propagation speed of lead tested superconducting coil (5) in the radial direction around part measuring lead wire two (20).
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|---|---|---|---|
| CN2010105401382A CN102023268B (en) | 2010-11-10 | 2010-11-10 | Device and method for measuring quench propagation velocity of superconducting coil |
| PCT/CN2011/000346 WO2012062024A1 (en) | 2010-11-10 | 2011-03-03 | Device and method for measuring quenching propagation speed of superconducting coil |
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| CN2010105401382A CN102023268B (en) | 2010-11-10 | 2010-11-10 | Device and method for measuring quench propagation velocity of superconducting coil |
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| CN102435965A (en) * | 2011-10-26 | 2012-05-02 | 兰州大学 | Multi-field coupling testing system of high temperature superconducting material |
| CN102435965B (en) * | 2011-10-26 | 2015-04-22 | 兰州大学 | Multi-field coupling testing system of high temperature superconducting material |
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| CN103366917A (en) * | 2013-06-28 | 2013-10-23 | 清华大学 | Refrigerating device and high-temperature superconducting magnet refrigerating device |
| CN103366917B (en) * | 2013-06-28 | 2016-04-27 | 清华大学 | Refrigerating plant and high-temperature superconducting magnet refrigerating plant |
| CN105510746A (en) * | 2015-12-28 | 2016-04-20 | 云南电网有限责任公司电力科学研究院 | High-temperature superconducting strip performance test device and use method |
| CN105510746B (en) * | 2015-12-28 | 2018-07-31 | 云南电网有限责任公司电力科学研究院 | A kind of high-temperature superconductor band performance testing device and application method |
| CN108374074A (en) * | 2018-05-18 | 2018-08-07 | 燕山大学 | A kind of high-temperature superconductor induction heating apparatus for large-scale shell ring heat treatment |
| CN109827838A (en) * | 2019-01-29 | 2019-05-31 | 兰州大学 | A kind of Multifunctional superconducting material mechanics experiment loading device |
| CN113064108A (en) * | 2021-03-15 | 2021-07-02 | 西安交通大学 | Device for measuring quenching and recovery characteristics of superconducting tape under forced convection cooling |
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| Publication number | Publication date |
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| WO2012062024A1 (en) | 2012-05-18 |
| CN102023268B (en) | 2013-12-04 |
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