2S-p01

技術進歩賞受賞記念講演་⸆⏝䝍䞁䝟䜽㉁䛾㉸㟁ᑟ㧗໙㓄☢Ẽศ㞳⿦⨨䛾㛤Ⓨ㻌㻰㼑㼢㼑㼘㼛㼜㼙㼑㼚㼠㻌㼛㼒㻌㻹㼑㼐㼕㼏㼍㼘㻌㻼㼞㼛㼠㼑㼕㼚㻌㻿㼏㼞㼑㼑㼚㼕㼚㼓㻌㻿㼥㼟㼠㼑㼙㻌㼡㼟㼕㼚㼓㻌㻴㼕㼓㼔㻌㻳㼞㼍㼐㼕㼑㼚㼠㻌㻹㼍㼓㼚㼑㼠㼕㼏㻌㻿㼑㼜㼍㼞㼍㼠㼕㼛㼚㻌㻌 㼎㼥㻌㻯㼞㼥㼛㼏㼛㼛㼘㼑㼞㻙㼏㼛㼛㼘㼑㼐㻌㻸㼀㻿㻌㻹㼍㼓㼚㼑㼠㻌㻌᳜⏣㻌 ᾈྐ䠄㜰኱䠅䠗㻌 ᯳ᕝ㻌 ୍ᘯ䠄஑኱䠅䠗㻌 ୖᒸ㻌 Ὀᬕ䠄䝁䞊䝹䝗䝔䝑䜽䠅䠗㻌 ᡃጔ㻌 Ὧ䠄᪩኱䠅䠗㻌ῡ㔝㻌 ಟ୍㑻䠈ྂ℩㻌 ඘✑䠄⏘⥲◊䠅䠗㻌 㣤ሯ㻌 ೔ᑜ䠈୰ᮧ㻌 ⚽୍䠄䝛䝑䝒䠅㻌㼁㻱㻰㻭㻌㻴㼕㼞㼛㼟㼔㼕㻌㻔㻻㼟㼍㼗㼍㻌㼁㼚㼕㼢㻚㻕㻧㻌㻷㻭㻶㻵㻷㻭㼃㻭㻌㻷㼍㼦㼡㼔㼕㼞㼛㻌㻔㻷㼥㼡㼟㼔㼡㻌㼁㼚㼕㼢㻚㻕㻧㻌㻷㻭㻹㻵㻻㻷㻭㻌㼅㼍㼟㼡㼔㼍㼞㼡㻌㻔㻯㼛㼘㼐㼀㼑㼏㼔㻕㻧㻌 㻌㻭㻳㻭㼀㻿㼁㻹㻭㻌㻷㼛㼔㻌㻔㼃㼍㼟㼑㼐㼍㻌㼁㼚㼕㼢㻚㻕㻧㻌㻲㼁㻯㻴㻵㻺㻻㻌㻿㼔㼡㼕㼏㼔㼕㼞㼛㻘㻌㻲㼁㻾㼁㻿㻱㻌㻹㼕㼠㼟㼡㼔㼛㻌㻔㻭㻵㻿㼀㻕㻧㻌㻌 㻵㻵㼀㻿㼁㻷㻭㻌㼀㼛㼙㼛㼔㼕㼞㼛㻘㻌㻺㻭㻷㻭㻹㼁㻾㻭㻌㻿㼔㼡㼕㼏㼔㼕㻌㻔㻺㻱㼀㻿㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼔㼑㼡㼐㼍㻬㼞㼏㼚㼜㻚㼛㼟㼍㼗㼍㻙㼡㻚㼍㼏㻚㼖㼜㻌㻌㻝䠊䛿䛨䜑䛻㻌䝫䝇䝖䝀䝜䝮᫬௦䛻䜐䛡䛯་⸆䞉๰⸆䛻䛚䛔䛶䠈㧗㏿䞉㧗ຠ⋡䞉㧗⢭ᗘ䛾ᢠయ䜔ศᏊ⣽⬊䞉䝍䞁䝟䜽㉁䛾ศ㞳⢭〇ᢏ⾡䛾䝙䞊䝈䛜ᙉ䛟䛺䛳䛶䛝䛶䛚䜚䠈᪂䛧䛔ศ㞳⢭〇ᢏ⾡䛾☜❧䛜ᮃ䜎䜜䜛[1,2]䚹≉䛻䠈䝠䝖ච␿ᶵ⬟䜢౑䛖ᢠయ་⸆䛿㧗䛔ຠ⬟䛜ᮇᚅ䛷䛝䜛ୖ䠈๪స⏝䜒ẚ㍑ⓗᑡ䛺䛔䛯䜑䠈௒ᚋ䛾་⸆䛾୺ὶ䛻䛺䜛䛸䛥䜜䠈ᡃ䛜ᅜ䛾〇⸆఍♫ྛ♫䛿㛤Ⓨ䞉ᐇ⏝໬䛷ඛ⾜䛧䛶䛔䜛Ḣ⡿ໃ䜈䛾ᑐᛂ䜢ᛴ䛔䛷䛔䜛䚹䛣䛾ᢠయ་⸆䜔䝽䜽䝏䞁䛾㛤Ⓨ䞉ᐇ⏝໬䛻Ḟ䛛䛫䛺䛔ᢏ⾡䛜་⸆⏝䝍䞁䝟䜽㉁䠄䝰䝜䜽䝻䞊䝘䝹ᢠయ䜔ච␿䜾䝻䝤䝸䞁䛺䛹䠅䛾኱㔞䞉㧗㏿䞉㐃⥆䛾ศ㞳⢭〇ᢏ⾡䛷䛒䜛䚹䛭䛣䛷䠈ᡃ䚻䛿䠈┠ⓗ≀㉁䜢ᅛᐃ໬䛧䛯☢ᛶ䝘䝜䝡䞊䝈䜢ศ㞳⢭〇⃰⦰䛷䛝䜛䠈ᑠᆺ㉸㟁ᑟ䝬 䜾 䝛 䝑 䝖 䜢 ⏝ 䛔 䛯 㧗 ໙ 㓄 ☢ Ẽ ศ 㞳 ⿦ ⨨ 䠄 HGMS: High
Gradient Magnetic Separation䠅䜢ᥦ᱌䛧䛶䛔䜛[3]䚹
ᮏㅮ₇䛷䛿䠈1) 㧗㏿ບ☢ᾘ☢䝬䜾䝛䝑䝖ཬ䜃㟁Ẽᅇ㊰䛾㛤Ⓨ䠈2) ㉸㟁ᑟ䝬䜾䝛䝑䝖෭༷⿦⨨䛾㛤Ⓨ䠈3) 㧗໙㓄☢Ẽศ㞳⏝䝣䜱䝹䝍䞊䛾௙ᵝ䛾Ỵᐃ䞉ヨస䠈4) ௨ୖ䜢⤌䜏ྜ䜟䛫䛶㧗☢ሙ☢Ẽศ㞳⿦⨨䜢ືస䛥䛫䛶⿦⨨䛸䛧䛶䛾ᛶ⬟䜢☜ㄆ䛧䛯⤖ᯝ䛻䛴䛔䛶ሗ࿌䛩䜛[4]䚹㻞䠊㧗໙㓄☢Ẽศ㞳⿦⨨⏝෭෾ᶵఏᑟ෭༷㉸㟁ᑟ䝬䜾䝛䝑䝖䛾㛤Ⓨ㻌 ᑠᆺ㧗ᛶ⬟෭༷ࢩࢫࢸ࣒タィ௒ᅇ䛿䠈ᕷ㈍䛾ᑠᆺ෭෾ᶵ䠄RDK205D@50 Hz, SHI䠅1 ྎ䜢౑⏝䛩䜛䛣䛸䛧䛯䚹䛣䛾෭෾ᶵ䛾෭෾⬟ຊ䛷䠈⿦⨨ᑠᆺ໬䛾䛯䜑䛻㔜せ䛺⇕ᦆኻ䜢᭱ᑠ䛻䛩䜛㟁ὶ䝸䞊䝗䛾᭱㐺タィ[5]䜢᳨ウ䛧䛯䚹㟁ὶ䝸䞊䝗䛿䜽䝷䜲䜸䝇䝍䝑䝖ෆ䛷䠈䜽䝷䜲䜸䝇䝍䝑䝖እᵴ䛾㟁ὶᑟධ➃Ꮚ䠄300 K䠅䛛䜙➨୍䝇䝔䞊䝆䠄⇕䝅䞊䝹䝗䠖 ᗘ 55 K䠅䜎䛷䛾㛫䠄㖡䝸䞊䝗䠅䛸䠈⇕䝅䞊䝹䝗䠄55 K䠅䛛䜙➨஧䝇䝔䞊䝆䠄㉸㟁ᑟ䝬䜾䝛䝑䝖➃Ꮚ䛚䜘䜃෭༷ᯈ䠖 ᗘ⣙
4 K䠅䜎䛷䛾㒊ศ䠄㧗 ㉸㟁ᑟ䝸䞊䝗䠅䛾஧ẁ㝵䛻ศ䛛䜜䛶䛔䜛䚹タィࡢ⤖ᯝ㸪ᚄ 3 mm㸪㛗ࡉ 450 mm ࡢ㖡〇ࡢ㟁ὶ࣮ࣜࢻࢆ᥇⏝ࡋࡓࠋࡲࡓ㸪⇕౵ධࢆ᭱ᑠ࡟ࡍࡿࡓࡵ࡟㉸㟁ᑟ䝬䜾䝛䝑䝖࡜⇕ࢩ࣮ࣝࢻ㛫ࡢᨭᣢᶵᵓ࡜⇕ࢩ࣮ࣝࢻ࡜እᵴ㛫ࡢᨭᣢᶵᵓࢆタィ࣭〇సࡋࡓࠋ ࣐ࢢࢿࢵࢺタィḟ䛻䠈㧗໙㓄☢Ẽศ㞳䝅䝇䝔䝮⏝䛾㉸㟁ᑟ䝬䜾䝛䝑䝖䜢タィ䛧䛯[6]䚹☢ᛶ䝣䜱䝹䝍䞊䜢㓄⨨䛩䜛䛯䜑䛻䠈30 mm ᚄ䛾ᐊ䝪䜰䜢☜ಖ䛧䠈୰ᚰ☢ሙ䜢 3 T 䛸䛧䛯䚹䝬䜾䝛䝑䝖ᕳ⥺⏝䛾⥺ᮦ䛸䛧䛶䠈 NbTi ⥺ᮦ䜢‽ഛ䛧䛯䚹⥺ᚄ 0.642 mm 䛷䠈㖡䛾ẕᮦ୰䛻 636 ᮏ䛾 NbTi 䝣䜱䝷䝯䞁䝖䛜㓄⨨䛥䜜䛯䠈㖡ẚ 1.3䠈䝒䜲䝇䝖䝢䝑䝏 70 mm 䛾⥺ᮦ䛷䛒䜛䚹⮫⏺㟁ὶ䛿䠈 ᗘ 4.2 K䠈
6, 7, 8 T 䛾☢ሙ୰䛷䛭䜜䛮䜜 279, 217, 146 A 䛷䛒䜛䚹タィ䛧䛯㉸㟁ᑟ䝬䜾䝛䝑䝖䛾ㅖඖ䜢 Table 1 䛻♧䛩䚹 ᾘ☢ᅇ㊰☢ᛶ⣽⥺䛛䜙䛺䜛䝣䜱䝹䝍䞊䜢⏝䛔䛶㧗໙㓄☢Ẽศ㞳䛻䜘䜚ᤕᤊ䛧䛯☢Ẽ䝡䞊䝈䜢ຠ⋡ⓗ䛻ᅇ཰䛩䜛䛯䜑䛻䛿䠈☢ᛶ䝣䜱䝹䝍䞊䛾ᾘ☢䛜ᚲせ䛷䛒䜛䛸⪃䛘䜙䜜䜛䚹䛭䛣䛷䠈Fig. 1 䛻♧䛩䜘䛖䛺㉸㟁ᑟ䝬䜾䝛䝑䝖䜢฼⏝䛧䛯 RLC ᾘ☢ไᚚᅇ㊰䜢⏝䛔䛶䠈䝣䜱䝹䝍䞊䛾ᾘ☢᪉ἲ䜢⪃᱌䛧䛯[7]䚹

Table 1.

Specifications of the superconducting magnet.
DesignFabrication

Inner diameter, 2a1

60.0 mm60.0 mm

Outer diameter, 2a299.9 mm

98.5 mm

Height, 2b82.0 mm

82.2 mm

Number of turns, N

4546

4311

Self-inductance, L

0.886 H

0.787 H

Current, I

60.0 A

63.1 A

Magnetic field at center, B0

3.0 T

3.0 T

Fig. 1. Electric circuit for excitation of the LTS magnet anddegaussing of the magnetic filter.

 㧗㏿ບ☢࣭ᾘ☢ࡢࡓࡵࡢ 㟁ὶᑐ⟇㧗㏿ບᾘ☢᫬䛻Ⓨ⏕䛩䜛⇕䜢㏿䜔䛛䛻෭༷䛩䜛䛯䜑ఏ⇕ᵓ㐀䛸㧗㏿ບᾘ☢᫬䛾 㟁ὶ㜵Ṇᵓ㐀䛜ᚲせ䛸䛺䜛䚹䛭䛣䛷䠈㉸㟁ᑟ䝬䜾䝛䝑䝖䛾෭༷䛷᭱䜒㔜せ䛺䠈㉸㟁ᑟ䝬䜾䝛䝑䝖䛾ᕳ䛝ᯟ䛸෭෾ᶵ䝁䞊䝹䝗䝦䝑䝗䛸䛾㛫䛾ఏ⇕ᯈ䛿䠈ᕳᯟ䛸୍యᆺ䛾䜰䝹䝭๐䜚ฟ䛧䛸䛧䛶᥋ゐ᢬ᢠ䜢䛺䛟䛧䛯䚹䜎䛯䠈 㟁ὶ㜵Ṇᵓ㐀䛸䛧䛶䠈䝬䜾䝛䝑䝖䛾ᕳᯟ䜢 2 ศ๭䛧䠄Fig. 2(a)ཧ↷䠅䠈⇕䝅䞊䝹䝗䜒䝣䝷䞁䝆㒊䠈෇⟄㒊䜢୰ᚰ䜎䛷 2 ศ๭䛻䛧䛯䚹 ⇕཰ᨭ
Table 2 䛻䠈ᨭᣢᶵᵓ䛚䜘䜃᩿⇕┿✵䠈㟁ὶᑟධ䝸䞊䝗䠈㟁ὶ䠈஺ὶᦆኻ䛻䜘䜛⇕㈇Ⲵ䛾ィ⟬⤖ᯝ䜢♧䛩䚹➨୍䝇䝔䞊䝆䠄⇕䝅䞊䝹䝗㒊䠅䛾౵ධ⇕䛿 63 A ㏻㟁᫬䛷 5.6 W䠈➨஧䝇䝔䞊䝆䠄㉸㟁ᑟ䝬䜾䝛䝑䝖㒊䠅䛾౵ධ⇕䛿 150 ⛊ບ☢䛷 0.068W䠈60 ⛊ບ☢䛷 0.31 W䠈63 A ㏻㟁᫬䛷 6.1 mW 䛜ぢ㎸䜎䜜䠈⇕㈇Ⲵ䛿෭෾⬟ຊ䛾⠊ᅖෆ䛷䛒䜛䛣䛸䛜ศ䛛䜛䚹
Fig. 2(b)(c)䛻䝇䝸䝑䝖ධ䜚ఏ⇕ᯈ䛚䜘䜃䝪䝡䞁䛻ᕳ䛔䛯䝁䜲䝹䛸㉸㟁ᑟ㧗໙㓄☢Ẽศ㞳⿦⨨䜢䛭䜜䛮䜜♧䛩䚹⿦⨨䛾䝃䜲䝈䛿䠈ᖜ 517 mm × ዟ⾜ 617 mm × 㧗䛥 1000 mm 䛷䛒䜛䚹☢ᛶࣇ࢕ࣝࢱ࣮ࡢ᳨ウ☢Ẽ䝡䞊䝈䜢ຠ⋡ⓗ䛻ศ㞳䞉ᅇ཰䛩䜛䛯䜑䛻䛿䠈┠ワ䜎䜚䛧䛺䛔㧗ᅇ཰⋡䛾䝣䜱䝹䝍䞊䛾◊✲㛤Ⓨ䜒㔜せㄢ㢟䛷䛒䜛䚹௒ᅇ䠈☢ᛶ⣽⥺䝣䜱䝹䝍䞊࿘ᅖ䛾☢Ẽຊゎᯒ䜢⾜䛳䛯⤖ᯝ䠈䝯䝑䝅䝳䛾㛤ཱྀ㒊䛻䜒༑ศ䛻☢Ẽຊ䛜ศᕸ䛩䜛䠈ᚄ 30 Pm 䛾350 Mesh 䛾ᖹ⧊䜢 200 ᯛ㔜䛽䛯䜒䛾䜢᥇⏝䛧䛯䚹☢Ẽศ㞳ᐇ㦂☢Ẽ䝡䞊䝈䛿䠈ከᦶᕝ⢭ᶵ〇䛾 FG beads® 䛷䠈ᚄ⣙ 50nm 䛾☢Ẽ䝡䞊䝈 3 ಶ⛬ᗘ䜢䝫䝸䝬䞊䛷⿕そ䛧䛯እᚄ⣙ 200nm 䛾䜒䛾䜢౑⏝䛧䛯䚹䛣䛾☢Ẽ䝡䞊䝈䜢⣧Ỉ䛻ᠱ⃮䛧䛯ᾮయ䛷☢Ẽศ㞳䞉ᅇ཰ᐇ㦂䜢⾜䛳䛯䚹̿̿

第92回

2015年度秋季低温工学・超電導学会

2S-p01

技術進歩賞受賞記念講演
Table 2.

Calculated heat load.
1st Stage (55 K)

2nd Stage (4.1 K)

Support0.02 W

5 mW

Vacuum insulation

0.21 W

0.14 mW

Power leads(Heat leak + Joule heat)

5.4 W(current: 63 A)

1.0 mW

Eddy current loss
in bobbin and flange-

2.0 mW(Ramp up time: 150 s)
6.0 mW(Ramp up time: 60 s)

AC loss in LTS winding-0.06 W(Ramp up time: 150 s)
0.3 W(Ramp up time: 60 s)

Total heat load

5.6 W
(current: 63 A)

0.068 W
(Ramp up time: 150 s)
0.31 W(Ramp up time: 60 s)
6.1 mW(current: 63 A)

Cooling capacity~ 6.5 W

~ 0.45 W(a)㻌

(a) (b)
(c)
(d)
(e)㻌
Fig. 3 Result of solutions in each process: (a) undiluted solution, (b)recovered solution under a magnetic field of 3 T, (c) recovered
solution after flushing under a magnetic field of 3 T, (d) recovered
solution after flushing in a zero magnetic field and (e) recovered
solution after demagnetization of the filter and flushing.㻌

(c)㻌

Fig. 4. Ratios of trapping and recovery of nanobeads: (a)non-trapped beads of 84%, (b) trapped beads of 16%, (c)non-trapped beads of 2.2%, (d) trapped beads of 97.8%, (e) recovery
beads of 0.1% applying 3 T, (f) recovery beads of 8.5% in 0 T, (g)recovery beads of 55.4% after applying AC 1 T for the 1st
demagnetization of the filter, (h) recovery beads of 19.8% afterapplying AC 1 T for the 2nd demagnetization of the filter, (i)recovery beads of 10.0% after applying AC 1 T for the 3rd
demagnetization of the filter and (j) non-recovery beads of 5.9%.㻌

(b)㻌

Fig. 2. (a) 3D design of the fabricated LTS magnet. Photograph of(b) the fabricated LTS magnet and (c) the prototype HGMS system.

 ᐇ㦂ᡭ㡰(1) 䝞䝑䝣䜯䞊ᾮ䛻䝡䞊䝈䜢ᠱ⃮䛧䠈200 mL 䛾ศᯒヨᩱ䜢స〇䛩䜛䚹(2) ☢ሙ䜢༳ຍ䛫䛪䛻䠈ศᯒヨᩱ䜢☢Ẽศ㞳⿦⨨䛾䝣䜱䝹
䝍䞊䜢㏻䛧䛶ὶ䛧䛶ᅇ཰䛧䠈䛣䛾ᅇ཰ᾮ䜢ẚ㍑ඖ䛾ཎᾮ䛸つᐃ䛧䠈䛣䛾ᅇ཰ᾮ䜢ẚ㍑ඖ䛾ཎᾮ䛸つᐃ䛧䠈ศගගᗘィ
䠄V-630, JASCO Corporation䠅䛷⃰ᗘ䜢 ᐃ䛩䜛䚹(3) ㉸㟁ᑟ䝬䜾䝛䝑䝖䜢 3 T 䛻ບ☢䛧䠈䛣䛾≧ែ䛷䠈ඛ⛬䛾ᅇ཰ᾮ䜢☢Ẽศ㞳⿦⨨䛾䝣䜱䝹䝍䞊䜢㏻䛧䛶ὶ䛧䛶ᅇ཰䛧䠈ศ㞳ᚋ䛾ᅇ཰ᾮ䛾⃰ᗘ䜢 ᐃ䛩䜛䚹(4) ㉸㟁ᑟ䝬䜾䝛䝑䝖䜢 3 T 䛻ບ☢䛧䛯≧ែ䛷䠈䝞䝑䝣䜯䞊ᾮ䛷䝣䜱䝹䝍䞊䜢Ὑί䛧䠈ᅇ཰ᾮ䛾⃰ᗘ䜢 ᐃ䛩䜛䚹(5) ㉸㟁ᑟ䝬䜾䝛䝑䝖䜢 0 T 䛻ῶ☢䛧䠈䛣䛾≧ែ䛷䠈䝞䝑䝣䜯䞊ᾮ䛷䝣䜱䝹䝍䞊䜢Ὑί䛧䠈ᅇ཰ᾮ䛾⃰ᗘ䜢 ᐃ䛩䜛䚹(6) ㉸㟁ᑟ䝬䜾䝛䝑䝖䜢 1 T 䛻ບ☢䛧䠈䛣䛾≧ែ䛛䜙ᾘ☢ᅇ㊰䜢సື䛥䛫䛶䝣䜱䝹䝍䞊䜢ᾘ☢䛧䠈䛣䛾≧ែ䛷䠈䝞䝑䝣䜯䞊ᾮ䜢ὶ䛧䛶䝣䜱䝹䝍䞊䜢Ὑί䛧䠈䝡䞊䝈䛾ᅇ཰䜢ᅗ䜛䚹ᅇ཰ᾮ䛾⃰ᗘ䜢 ᐃ䛧䠈䝡䞊䝈䛾ᅇ཰⋡䜢 ᐃ䛩䜛䚹 ᐇ㦂⤖ᯝ
Fig. 3 䛿ᐇ㦂䛾ྛ䝥䝻䝉䝇䛾ᅇ཰ᾮ䛾ᵝᏊ䜢♧䛧䛯෗┿
䛷䛒䜛䚹Fig. 4 䛿୍㐃䛾☢Ẽศ㞳䞉ᅇ཰ᐇ㦂䛾⤖ᯝ䜢䜎䛸䜑䛯䜒䛾䛷䛒䜛䚹3 T 䛾☢ሙ䜢༳ຍ䛧䛯≧ែ䛷䠈ᠱ⃮ᾮ䜢䝣䜱䝹䝍
䞊䛻㏻䛩䛸㧗໙㓄☢Ẽศ㞳䛻䜘䜚 97.8 %䛾☢ᛶ䝡䞊䝈䛜ᤕᤊ䛥䜜䛯䚹ᅇ཰䝥䝻䝉䝇䛷䛿䠈☢ሙ 3 T ༳ຍ≧ែ䛷Ὑί䛩䜛䛸
0.1 %䠈☢ሙ䜢䝊䝻䛻䛧䛶Ὑί䛩䜛䛸 8.5 %䛾☢Ẽ䝡䞊䝈䛧䛛ᅇ཰䛥䜜䛺䛛䛳䛯䚹䛭䛾ᚋ䠈ᾘ☢ᅇ㊰䜢ືస䛥䛫䠈1 T 䛾஺ὶ☢⏺䜢༳ຍᚋ䠈Ὑί䛩䜛䛸䠈55.4 %䛾☢Ẽ䝡䞊䝈䛜ᅇ཰䛥䜜䛯䚹䛣䜜䛿䠈䝣䜱䝹䝍䞊䛾ᾘ☢䛜☢Ẽ䝡䞊䝈䛾ᅇ཰⋡䛾ᨵၿ䛻ຠᯝ䛜䛒䜛䛣䛸䜢♧䛧䛶䛔䜛䚹2 ᅇ┠䠈3 ᅇ┠䛾ᾘ☢䞉Ὑί䛸ྜ䜟䛫䜛䛸 94 %䛾☢Ẽ䝡䞊䝈䛜ᅇ཰䛥䜜䛯䚹䛺䛚䠈୍㐃䛾ฎ⌮䛻せ䛧䛯᫬㛫䛿 13 ศ䛷䛒䛳䛯䚹ࡲ࡜ࡵ
་⸆⏝䝍䞁䝟䜽㉁䛾ศ㞳⢭〇䜢䠈ప䝁䝇䝖䠈㧗ຠ⋡䛷⾜䛖༟ୖᆺ㉸㟁ᑟ☢Ẽศ㞳⿦⨨䛾㛤Ⓨ䛾䛯䜑䠈㧗㏿ศ㞳ฎ⌮䛻ᚲせ䛺㧗㏿ບ☢䞉ᾘ☢ᑐᛂ䛧䛯㉸㟁ᑟ䝬䜾䝛䝑䝖䛚䜘䜃෭༷䝅䝇䝔䝮䠈㧗໙㓄☢Ẽศ㞳⏝䝣䜱䝹䝍䞊䜢〇స䛧䛯䚹☢Ẽศ㞳䞉ᅇ཰ᐇ㦂䛾⤖ᯝ䠈☢Ẽ䝡䞊䝈䛾ᤕᤊ⋡䠖98 %䠈ᅇ཰⋡䠖94 %䛸䛔䛖⤖ᯝ䜢ᚓ䛶䠈௒ᚋ䛾㔞⏘ᑐᛂ䛾ᐇ⏝ᶵ㛤Ⓨ䛻ྥ䛡䛶኱䛝䛺ᡂᯝ䛜ᚓ䜙䜜䛯䚹㸺ㅰ㎡㸼ᮏ◊✲䛾୍㒊䛿䠈⤒῭⏘ᴗ┬ 㛵ᮾ⤒῭⏘ᴗᒁ ᖹᡂ 23ᖺᗘᡓ␎ⓗᇶ┙ᢏ⾡㧗ᗘ໬ᨭ᥼஦ᴗ䠄୕ḟ⿵ṇ䠅䛾୍⎔䛸䛧䛶ᐇ᪋䛧䛯䜒䛾䛷䛒䜛䚹ཧ⪃ᩥ⊩㻌
1. ༙⏣ ᏹ ௚ ┘ಟ㸪ࠕ☢ᛶࣅ࣮ࢬࡢࣂ࢖࣭࢜⎔ቃᢏ⾡࡬ࡢᛂ⏝ᒎ㛤ࠖ㸪ࢩ࣮࢚࣒ࢩ࣮ฟ∧㸦2006㸧
2. T. Nakagawa, et al., TEION KOGAKU, 45 (2010) 436-443.
3. H. Ueda, et al., IEEE Trans. Appl. Superoncd. 19 (2009)
2157-2161.
4. H. Ueda, et al, TEION KOGAKU, 49 (2014) 25-34.
5. M. Furuse, et al., Cryogenics, 49 (2009) 263–266.
6. Y. Iwasa, Case Studies in Superconducting Magnets, 2nd ed., NewYork: Springer Science+Business Media (2009) 274.
7. H. Ueda, et al., IEEE Trans. Appl. Supercond., 20 (2010) 949-952.

̿̿第92回

2015年度秋季低温工学・超電導学会