2B-a01

酸化物バルク (1)9RUWH[FRLO ࢆ⏝࠸ࡓࣃࣝࢫ╔☢ࡢ☢ሙᤕᤊࡢࢩ࣑࣮ࣗࣞࢩࣙࣥ

Simulation of pulsed field magnetization on HTSC bulk using vortex-coil⸨௦༤அ㸪ᑠᒣ ඔ㸪ෆ⸨ᬛஅ ᒾᡭ኱ᕤ 
FUJISHIRO Hiroyuki, OYAMA Mitsuru, NAITO Tomoyuki (Iwate Univ.)(E-mail: fujishiro@iwate-u.ac.jp)ࡣࡌࡵ࡟ ᮏ◊✲ࢢ࣮ࣝࣉࡣࡇࢀࡲ࡛ࠊ㉸ఏᑟࣂࣝࢡ࡬ࡢࣃࣝࢫ╔☢࡟࠾ࡅࡿᤕᤊ☢ሙࡢྥୖࢆ┠ᣦࡋ࡚ࠊ☢᮰ࡢ౵ධ࡟ࡼࡿ
ᒁᡤⓗ࡞ ᗘୖ᪼࡜ᤕᤊ☢ሙࡢ㛵ಀࢆᐇ㦂ⓗ࡟᳨ウࡋ࡚ࡁࡓࠋࡋ࠿ࡋࠊᐇ㦂᳨࡛ウ࡛ࡁࡿ⠊ᅖ࡟ࡣ㝈ࡾࡀ࠶ࡾࠊᤕ
ᤊ☢ሙྥୖࡢࡓࡵࡢ⤫୍ⓗ࡞ᣦ㔪ࡀᚲせ࡜࡞ࡿࠋ๓ᅇࡢᏛ
఍࡛ࠊ㟁☢ሙ- ᗘࡢ㐃ᡂࢩ࣑࣮ࣗࣞࢩࣙࣥࡢᡭἲࢆᵓ⠏ࡋࠊsolenoid-coil ࢆ⏝࠸ࡓᤕᤊ☢ሙྥୖ࡬ࡢ᪉ྥᛶࢆሗ࿌
ࡋࡓ[1,2]ࠋᮾிᾏὒ኱ࡢ࿴Ἠࡽࡢ◊✲ࢢ࣮ࣝࣉࡣࠊ ᕳࡁᆺࢥ࢖ࣝ(vortex-coil)ࢆ⏝࠸ࡓࣃࣝࢫ╔☢ࢆᐇ㦂ⓗ࡟᳨ウࡋࠊsolenoid-coil ࡼࡾࡶప࠸ࣃࣝࢫ☢ሙ࠿ࡽࣂࣝࢡ୰ᚰ
࡟☢ሙࡀᤕᤊࡉࢀࠊ᭱኱ᤕᤊ☢ሙࡀቑ኱ࡍࡿࡇ࡜ࢆ♧ࡋ࡚࠸ࡿࡀ[3]ࠊࡑࡢ࣓࢝ࢽࢬ࣒ࡣ᫂ࡽ࠿࡟ࡉࢀ࡚࠸࡞࠿ࡗࡓࠋ
ᮏ◊✲࡛ࡣ vortex-coil ࢆ⏝࠸ࡓ╔☢⌧㇟ࢆࢩ࣑࣮ࣗࣞࢩ
࡛ࣙࣥゎᯒࡋࠊsolenoid-coil ࡜ࡢ㐪࠸ࢆ㆟ㄽࡍࡿࠋ
ゎᯒ࡜᳨ウ ᅗ㸯࡟ vortex-coil ࡜ solenoid-coil ࡢᐇ㦂㓄⨨ࢆ♧ࡍࠋ
vortex-coil (ID=4 mm, H=35 mm)ࡣࠊഃ㠃࠿ࡽ Ts=40 K࡟ఏᑟ෭༷ࡋࡓ㉸ఏᑟࣂࣝࢡ(I45 mm, t15 mm)ࡢୖୗ࡟
タ⨨ࡍࡿࠋゎᯒ࡛ࡣእᚄࡢ␗࡞ࡿ㸰ࡘࡢ vortex-coilࠊS-coil(OD=30 mm)࡜ L-coil (OD=62 mm)࡟ࡘ࠸᳨࡚ウࡋࡓࠋẚ㍑ࡢࡓࡵࠊsolenoid-coil (ID=82 mmࠊOD=116 mmࠊ
H=50 mm)࡟ࡘ࠸࡚ࡶゎᯒࡋࡓࠋ㟁☢⏺࡜⇕ఏᑟࡢ㐃ᡂ᪉⛬ᘧࡣࠊ኱ᓮࡽࡢゎᯒ[4]ࢆཧ⪃࡟ࠊ(ᰴ)ࣇ࢛ࢺࣥࡢ EDDYTHERMO ࢆ⏝࠸࡚ゎᯒࡋࡓࠋ㉸ఏᑟయࡢ㠀⥺ᙧ࡞ E-J≉ᛶࡣ n ್ࣔࢹࣝࢆ⏝࠸ࠊ⮫⏺㟁ὶᐦᗘ Jc ࡢ☢ሙ౫Ꮡᛶࡣ (1) ᘧ ࡢ ࡼ ࠺ ࡟ Kim ࣔ ࢹ ࣝ ࢆ ⏝ ࠸ ࡚ ⾲ ⌧ ࡋ ࡓ ࠋ
㸦D=4.6x108 A/m2ࠊTc=92 K㸧ࡃ࡞ࡿ࡜ࠊ࠸ࡎࢀࡢࢥ࢖࡛ࣝ╔☢ࡍࡿሙྜ࡛ࡶ☢᮰ࡣࣂࣝࢡ୰ᚰࡲ࡛฿㐩ࡍࡿࡀࠊഃ㠃࠿ࡽࣂࣝࢡࢆఏᑟ෭༷ࡍࡿ
vortex-coil ࡢ᪉ࡀ ᗘୖ᪼ࡀᑠࡉ࠸ࡓࡵ᭱኱ࡢᤕᤊ☢ሙࡣ኱ࡁࡃ࡞ࡿ࡜⪃࠼ࡿࡇ࡜ࡀฟ᮶ࡿࠋཧ⪃ᩥ⊩[1] ⸨௦࡯࠿ࠊ➨ 82 ᅇ 2010 ᖺᗘ᫓Ꮨప

[2] H. Fujishiro et al., Supercond. Sci. Tech. 23 (2010) 105021[3] T. Ida et al., Physica C 412-414 (2004) 638[4] Y. Komi, H. Ohsaki et al., Physica C 469 (2009) 1262

Fig. 1. The experimental setup for the pulsed fieldmagnetization using the vortex-coil and the solenoid coil.
3
z
0

(1)

23

2

bulk

1

Ts=40 Krz

B (r=0) (T)

3
2

2
­
° B0
° §T · ½
J c (T,B) D ®1 ¨ ¸ ¾° B  B0° ©Tc ¹ ¿¯ᕤᏛ࣭㉸㟁ᑟᏛ఍

[3D-a08]㸦ᕝᓮ㸧

D=4.6x108 A/m2 ࡣ Jc (40 K, 0 T)=3.3 x 108 A/m2 ࡟┦ᙜࡍࡿࠋ༳ຍࡍࡿࣃࣝࢫ☢ሙ Bex(t)ࡣࠊ❧ࡕୖࡀࡾ᫬㛫W=0.01 s ࡜ࡋࠊᐇ㦂࡛⏝࠸ࡓࣃࣝࢫἼᙧࢆ㏆ఝࡋࡓࠋ ᅗ㸰࡟༳ຍ☢ሙ Bex ࡜ࣂࣝࢡ୰ᚰ⾲㠃࡛ࡢᤕᤊ☢ሙ
Bz(r=0)ࡢ㛵ಀ࡟ࡘ࠸࡚ࡢࢩ࣑࣮ࣗࣞࢩࣙࣥ⤖ᯝࢆ♧ࡍࠋsolenoid-coil ࡛ࡣࣂࣝࢡ୰ᚰ⾲㠃࡟ 4 T ࠿ࡽ☢ሙࡀᤕᤊࡉࢀࡣࡌࡵࠊ6 T ࡛᭱኱ Bz(r=0)=1.7 T ࡜࡞ࡿࠋࣂࣝࢡࡢ
እᚄࡼࡾࡶࢥ࢖ࣝእᚄࡀᑠࡉ࡞ vortex S-coil ࡛ࡣ 2 T ௜㏆࠿ࡽࣂࣝࢡ୰ᚰ⾲㠃࡟☢ሙࡀᤕᤊࡉࢀࡣࡌࡵࠊBex=9 T
࡛᭱኱ Bz(r=0)=2.6 T ࡢ☢ሙࡀᤕᤊࡉࢀࡿࠋ୍᪉ࠊࣂࣝࢡ
ࡢእᚄࡼࡾࡶࢥ࢖ࣝእᚄࡀ኱ࡁ࠸ vortex L-coil ࡛ࡣࠊḟ➨࡟ solenoid-coil ࡢ᣺ࡿ⯙࠸࡟㏆ࡃ࡞ࡿࠋࡇࢀࡽࡢ⤖ᯝࡣ࿴Ἠࡽࡢᐇ㦂⤖ᯝ[3]ࢆᐃᛶⓗ࡟෌⌧ࡋ࡚࠸ࡿࠋ ᅗ㸱࡟ Bex=4 T ࡟࠾ࡅࡿ vortex S-coil ࡜ solenoid-coil࡛╔☢ࡋࡓᚋࡢᤕᤊࡉࢀࡓ☢᮰⥺ࡢศᕸࢆࡑࢀࡒࢀ♧ࡍࠋ(a)ࡢ vortex S-coil ࡛ࡣࢥ࢖ࣝ࠿ࡽࡢ☢ሙࡣࣂࣝࢡ⾲㠃࠿ࡽ౵ධࡍࡿࡓࡵ⾲㠃࡟ࡢࡳ࡟☢᮰ࡀᤕᤊࡉࢀࠊࣂࣝࢡෆ㒊࡟ࡣ☢᮰ࡣᤕᤊࡉࢀ࡞࠸ࠋࡇࢀࡣỌஂ☢▼ࢆࣂࣝࢡ࡟㏆࡙ࡅ࡚╔☢ࡍࡿ࢖࣓࣮ࢪ࡟ఝ࡚࠸ࡿࠋࡑࢀ࡟ᑐࡋ࡚(b)ࡢ
solenoid-coil ࡛ࡣ☢᮰ࡣࣂࣝࢡ࿘㎶㒊࠿ࡽ㐍ධࡋࠊr=13
mm ௜㏆࡟᭱኱ࡢ☢᮰ࡀᤕᤊࡉࢀࡿࡀࠊࣂࣝࢡ୰ᚰ㒊࡟ࡣ☢᮰ࡀ฿㐩ࡋ࡚࠸࡞࠸ࡇ࡜ࡀศ࠿ࡿࠋ༳ຍ☢ሙ Bex ࡀ኱ࡁ

vortex S-coilvortex L-coilsolenoid coil
0

0

2

4

B

6

ex

(T)

8

10

12

Fig. 2. The simulation of the applied field dependence oftrapped field Bz(r=0) at 40 K at the center of the bulk surface
for vortex-coils (S-coil, L-coil) and the solenoid coil.

zz(a) vortex S-coil

23r(b) solenoid coil23rFig. 3. The cross section of the magnetic flux distribution in
the bulk magnetized using (a) vortex S-coil and (b)solenoid-coil after applying magnetic pulse of Bex=4 T at 40 K.

― 157 ―

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2010年度秋季低温工学・超電導学会

2B-a02

酸化物バルク (1)超伝導バルクのJc分布とパルス着磁特性（Ⅰ）࡯࠯ࡠ⏛႐಄ළ⌕⏛ <(% ߣߩᲧセ࡯
Jc distribution and trapped field distribution by pulsed field magnetization insuperconducting bulk ,— The comparison with trapped field distribution by zero-field cooling —⨹ደᢝ ⾆ᄢ㧘ฎ↰ ᄢ᮸㧘ౝ⮮ ᥓਯ㧘⮮ઍ ඳਯ㧔ጤᚻᄢ㧕
ARAYASHIKI Takahiro, FURUTA Daiki, NAITO Tomoyuki, FUJISHIRO Hiroyuki (Iwate Univ.)
E-mail; fujisiro@iwate-u.au.jpᄢ߈ߊ‫ޔ‬ฝਅ߆ࠄ߽⏛႐߇ଚ౉ߒߡ߅ࠅ‫(ޔ‬a) ߣ (b)ߦ߅

ߪߓ߼ߦ⿥વዉࡃ࡞ࠢ૕ߦ߅ߌࠆࡇࡦᱛ߼ജ F㧔෶ߪ⥃⇇㔚ᵹኒp޿ߡ⏛႐߇ᒝߊ᝝ᝒߐࠇߚㇱಽߦߪ㑐ㅪᕈ߇޽ࠆߎߣ߇

ᐲ Jc 㧕ߩჇടߪ᝝ᝒ⏛႐ߩჇᄢߦ❬߇ࠆ‫⏛ޕ‬႐ਛ಄ළ⌕⏛ಽ߆ࠆ‫ޕ‬Fig. 2 ߪ 60 K ߦ߅ߌࠆ Bulk-B ߦኻߔࠆ (a) PFM ߣ(FCM) ߿࠯ࡠ⏛႐಄ළ⌕⏛(ZFC) ߪ㕒⏛႐ࠍශടߔࠆߩ

(b) ZFC ߩ᝝ᝒ⏛႐ಽᏓࠍ␜ߔ‫ ޕ‬PFM ߢߪ਄ᣇ࡮ฝᣇ߆ࠄ

ߦኻߒ‫(⏛⌕ࠬ࡞ࡄޔ‬PFM) ߪ⍍㑆⊛ߥ⏛႐ࠍශടߔࠆߚ

ߩ⏛႐ߩଚ౉߇ᄢ߈ߊ‫ޔ‬ZFC ߢߪฝ਄࡮ਅᣇߢߩ᝝ᝒ⏛႐߼‫ࡦࡇޔ‬ᱛ߼៊ᄬ߿☼ᕈ៊ᄬߦࠃࠆ⊒ᾲ߇᝝ᝒ⏛႐ಽᏓߦ߇ᄢ߈޿‫ޕ‬Fig. 2 ߢ߽ Fig. 1 ห᭽‫ޔ‬PFM ߣ ZFC ߦ߅ߌࠆ⏛ਈ߃ࠆᓇ㗀ࠍήⷞߔࠆߎߣ߇಴᧪ߥ޿‫ࡦࡇߦߢ߹ࠇߎޕ‬ᱛ႐߇ᒝߊ᝝ᝒߐࠇߚㇱಽߦ㑐ㅪᕈ߇޽ࠆߎߣ߇ࠊ߆ࠆ‫ޕ‬᝝߼ജߩਇဋ৻ᕈߣ᝝ᝒ⏛႐ಽᏓߩ㑐ଥߪቯᕈ⊛ߦߪ⼏⺰ᝒㇱಽߦ⧯ᐓߩ㆑޿߇޽ࠆߩߪ‫߇᧤⏛ޔ‬ᕆỗߥㆇേࠍߔࠆ

ߐࠇߡ޿ࠆ߇‫ޔ‬ቢోߥℂ⸃߹ߢߪ⥋ߞߡ޿ߥ޿‫ ޕ‬PFM ߢ

PFM ߢߪዪᚲ⊛ߦࡇࡦᱛ߼ജߩᒙ޿ㇱಽߦ⏛႐߇᝝ᝒߐ

ߪࡃ࡞ࠢ๟ㄝㇱߩࡇࡦᱛ߼ജߩᒙ޿ㇱಽ߆ࠄ⏛႐߇ଚ౉ࠇࠆߩߦኻߒ‫᧤⏛ޔ‬ㆇേߩ✭߿߆ߥ ZFC ߢߪ⋧ኻ⊛ߦࡇߔࠆߎߣߪ੍ᗐߐࠇࠆ߇‫ࡦࡇߦ⊛⚳ᦨޔ‬ᱛ߼ജߩᒝ޿ㇱಽࡦᱛ߼ജߩᒙ޿ᐢ޿㗔ၞߦ⏛႐߇᝝ᝒߐࠇߡ޿ࠆߣ⠨߃ߦ⏛႐߇᝝ᝒߐࠇࠆߩ߆‫ߪ޿ࠆ޽ޔ‬ᒙ޿ㇱಽߦ᝝ᝒߐࠇࠆ

ࠄࠇ‫߽ߡ޿߅ߦ⏛⌕ࠬ࡞ࡄޔ‬ૐ⏛႐ߢ⏛᧤߇ଚ౉ߒ᝝ᝒߔ

ߩ߆‫ޔ‬᣿ࠄ߆ߦߐࠇߡ޿ߥ޿‫৻ޕ‬ᣇ‫ޔ‬ZFC ߢߪ⏛႐߇ࡃ࡞ࠆㇱಽߪࡇࡦᱛ߼ജ Fc ෶ߪ Jc ߇ᒙ޿ㇱಽߢ޽ࠆߣ⸒߃

ࠢ๟ㄝㇱߩࡇࡦᱛ߼ജߩᒙ޿ㇱಽߦ᝝ᝒߐࠇࠆߣ⠨߃ࠄࠆ‫ޕ‬ᒰᣣߪ‫ࠆߥ⇣ޔ‬ශട⏛႐ߢߩ᝝ᝒ⏛႐ಽᏓ߿‫ࡃߩઁޔ‬ࠇߡ޿ࠆ‫⎇ᧄߢߎߘޕ‬ⓥߢߪ‫ߞⴕࠍ⏛⌕ࠬ࡞ࡄߢ߹ࠇߎޔ‬࡞ࠢߦ߅ߌࠆ⚿ᨐߦߟ޿ߡ߽ႎ๔ߔࠆ‫ޕ‬ߚ⿥વዉࡃ࡞ࠢ૕ߦኻߒߡ ZFC ࠍⴕ޿‫ޔ‬ਔ⠪ߩࡃ࡞ࠢ๟ෳ⠨ᢥ₂
[1] T.Miura, et al. Abstracts of CSJ Conference, Vol. 81 (2009)[1P-p10]ㄝㇱߦ߅ߌࠆ᝝ᝒ⏛႐ಽᏓ߆ࠄࡇࡦᱛ߼ജಽᏓߦߟ޿ߡ
⠨ኤߔࠆ‫ޕ‬ታ㛎ᣇᣇᴺᴺGd ♽⿥વዉࡃ࡞ࠢBulk-A PPĳPPW,67(&‫ޔ‬⵾

Ts=60 K, Bex=1.3 T (PFM)

Ts=60 K, Bex=0.5 T (ZFC)

(a)

(b)

ࠍෘߐᣇะߦ3 ᨎߦࠬ࡜ࠗࠬߒߚࡃ࡞ࠢ
㧔਄ㇱ߆ࠄA-1‫ޔ‬

A-2 ‫ޔ‬A-3 ‫ ޔ‬A-1 ࠍᦝߦෘߐᣇะߦ 2 ᨎߦࠬ࡜ࠗࠬߒߚࡃ࡞ࠢ ਄ㇱ߆ࠄ A-1-1‫ޔ‬A-1-2 ߣ‫ޔ‬Gd ♽⿥વዉࡃ࡞ࠢBulk-B PPĳ‫ޔ‬22 mmt; ISTEC ⵾㧕ߦ߅޿ߡࡄ࡞ࠬ⌕⏛ߣ ZFC
1 mm upࠍⴕߞߚ‫ ޕ‬PFM ߢߪࡃ࡞ࠢࠍ T s=40~77K ߦ಄ළߒ‫࡟࠰ޔ‬ࡁࠗ࠼ဳࡄ࡞ࠬࠦࠗ࡞ࠍ↪޿ߡࡄ࡞ࠬ⏛႐㧔Bex=2.0~6.0

T┙ߜ਄߇ࠅᤨ㑆 12 ms㧕ࠍශടߒߡ⌕⏛ࠍⴕߞߚ‫⏛⌕ޕ‬ᓟ‫⴫ࠢ࡞ࡃޔ‬㕙߆ࠄ 1 mm ਄ᣇߩ⏛႐ಽᏓࠍࡎ࡯࡞࠮ࡦࠨ
ߦࠃࠅ᷹ቯߒߚ‫ޕ‬ZFC ߢߪࡃ࡞ࠢࠍ T s=60~77K ߦ಄ළߒ‫ޔ‬

0.5~4.0 T㧔⏛႐ᄌൻㅦᐲ; 3.7 mT/s㧕ߩ㕒⏛႐ࠍශടߒߡ⌕3 mm upFig. 1 Trapped field distribution of the bulk-A-1-1 at 60 K
magnetized by (a) PFM (Bex=1.3T) and (b) ZFC (Bex=0.5 T)
Ts=60 K, Bex=3.5 T (PFM)

Ts=60 K, Bex=2.0 T (ZFC)

(a)

(b)

⏛ࠍⴕߞߚ‫⏛⌕ޕ‬ᓟ‫⴫ࠢ࡞ࡃޔ‬㕙߆ࠄ 3 mm ਄ᣇߩ⏛႐ಽᏓࠍࡎ࡯࡞࠮ࡦࠨߦࠃࠅ᷹ቯߒߚ‫ޕ‬⚿ᨐߣ⠨ኤ
Fig. 1 ߦ 60 K ߦ߅ߌࠆ A-1-1 ߦኻߔࠆ(a) PFM ߣ(b) ZFC

1 mm up

3 mm upߩ᝝ᝒ⏛႐ಽᏓࠍ␜ߔ‫(ޕ‬a) ߢߪᏀᣇ߆ࠄᒝߊ⏛႐߇ଚ౉ߒ᝝ᝒߐࠇߡ߅ࠅ‫߽ߦઁߩߘޔ‬਄ਅ㨯ฝਅ߆ࠄ⏛႐߇ଚ౉ߒ᝝ᝒߐࠇߡ޿ࠆ‫৻ޕ‬ᣇ‫(ޔ‬b) ߢߪ਄ᣇ߆ࠄ⏛႐ߩଚ౉߇

Fig. 2 Trapped field distribution of the bulk-B at 60 K
magnetized by (a) PFM (Bex=3.5T) and (b) ZFC (Bex=2.0 T)― 158 ―

第83回

2010年度秋季低温工学・超電導学会

2B-a03

酸化物バルク (1)㉸ఏᑟ䝞䝹䜽䛾 㻶㼏 ศᕸ䛸䝟䝹䝇╔☢≉ᛶ㻌 㻔䊡㻕㻌䠉㻌 㻶㼏 ┤᥋ᐃ䛸䛾ẚ㍑㻌 䠉㻌

Jc distribution and trapped field distribution by pulsed field magnetization insuperconducting bulk 䊡- The comparison with direct measurement of Jc -㻝㻚ྂ⏣㻌 ኱ᶞ㻘㻌 Ⲩᒇᩜ㻌 ㈗኱㻘㻌 ෆ⸨㻌 ᬛஅ㻘㻌 ⸨௦㻌 ༤அ㻌 㻔ᒾᡭ኱ᕤ㻕㻌
FURUTA Daiki, ARAYASHIKI Takahiro, NAITO Tomoyuki, FUJISHIRO Hiroyuki (Iwate Univ.)
E-mail: furuta0429@yahoo.co.jp㻌ᤊ☢ሙศᕸ䛸┦㛵䛧䛺䛔䚹䝟䝹䝇╔☢䛷䛿䚸እ࿘㒊䛾ᒁᡤⓗ䛿䛨䜑䛻㻌㻌 2009 ᖺ⛅䛾Ꮫ఍(ᒸᒣ)䛷䚸┤ᚄ 45 䡉䡉䚸ཌ䛥 18 䡉䡉䛾䛺 Jc 䛾ᑠ䛥䛺㡿ᇦ䛛䜙☢᮰䛜౵ධ䛧䚸䛭䛾ᚋ䛾☢᮰䛾㐠ື䛻Gd ⣔㉸ఏᑟ䝞䝹䜽䜢ཌ䛥᪉ྥ䛻 3 ᯛ䛻䝇䝷䜲䝇䛧䚸䛭䛾ᤕᤊ䜘䜚ᤕᤊ☢ሙศᕸ䜢Ỵ䜑䛶䛔䜛䛸⪃䛘䜙䜜䜛䚹☢ሙศᕸ䛜ཌ䛥᪉ྥ䛻㛵㐃䛧䛶䛔䜛䛣䛸䜢ሗ࿌䛧䛯䠷1䠹䚹䛣䜜ཧ⪃ᩥ⊩㻌䜎䛷䛾୍㐃䛾◊✲䛷䚸䝟䝹䝇╔☢䛻䜘䜛ᤕᤊ☢ሙศᕸ䛻䛿୙[1] T. Miura, et al. Abstracts of CSJ Conference,Vol. 81ᆒ୍䛜኱䛝䛟䚸䛣䛾୙ᆒ୍ศᕸ䛸㉸ఏᑟ䝞䝹䜽䛾 Jc ศᕸ䛻䛹(2009) [1P-p10]

䛾䜘䛖䛺㛵ಀ䛜䛒䜛䛛䛿⯆࿡῝䛔ၥ㢟䛷䛒䜛䛜䚸㢮᥎䛾ᇦ䜢ฟ䛺䛛䛳䛯䚹䛭䛣䛷ᮏ◊✲䛷䛿䚸䝇䝷䜲䝇䛧䛯䝞䝹䜽䛾 1 ᯛ䜢䛥ABC䜙䛻ཌ䛥᪉ྥ䛻䝇䝷䜲䝇䛧䚸ཌ䛥 2 mm 䛾ⷧᯈ䝞䝹䜽㉸ఏᑟయ䛾䝟䝹䝇╔☢≉ᛶ䜢ㄪ䜉䛯䚹䛥䜙䛻䚸ⷧᯈ䝞䝹䜽㉸ఏᑟయ䜢ᑠ∦䛻ษ᩿䛧䛶☢໬ ᐃ䜢⾜䛔䚸⮫⏺㟁ὶᐦᗘ Jc 䜢⟬ฟ䛧䛯䚹┤᥋ᐃ䛧䛯 Jc ศᕸ䛸ᤕᤊ☢ሙศᕸ䛸䛾㛵ಀ䜢㆟ㄽ䛩䜛䚹

㻞㻚

ᐇ㦂᪉ἲ㻌

ⷧᯈ䝞䝹䜽㉸ఏᑟయ(45 mmI×2 mm)䛿 Ts=40~60 K 䛻┿✵

(a)

(b)

ᐜჾ୰䛷ఏᑟ෭༷䛥䜜䚸䝋䝺䝜䜲䝗ᆺ䝟䝹䝇䝁䜲䝹䜢⏝䛔䛶䚸༳ຍ☢ሙ Bex=0.9~1.6 T 䛾⠊ᅖ䛷༢୍䝟䝹䝇╔☢䜢⾜䛳䛯䚹A
BC

䝟䝹䝇╔☢ᚋ䛾ᤕᤊ☢ሙศᕸ䛿䝞䝹䜽⾲㠃䛛䜙 1.0 mm ୖ᪉䛻䝩䞊䝹䝉䞁䝃䜢㉮ᰝ䛧䛶ᐃ䛧䛯䚹䜎䛯䚸䛣䛾ⷧᯈ䝞䝹䜽㉸ఏᑟయ䜢 Fig. 1(a)䛻♧䛩䜘䛖䛻䝞䝹䜽䛾 A,B,C-line 䛻ἢ䛳䛶
1×1×2 mm3 䛾ᑠ∦䛻ษ᩿䛧䚸SQUID 䛷 77 K 䛸 50 K 䛻䛚䛔䛶
0䡚5 T 䛾⠊ᅖ䛷☢໬ ᐃ䜢⾜䛳䛯䚹 ᐃ⤖ᯝ䛛䜙䚸ᣑᙇᆺ䝡

(c)

(d)

䞊䞁䝰䝕䝹䜢฼⏝䛧䛶⮫⏺㟁ὶᐦᗘ䜢⟬ฟ䛧䛯䚹

Fig. 1 Trapped field distribution after applying pulsed field of㻟㻚

1.3 T and 1.6 T at 40 K and these cross sections along⤖ᯝ䛸⪃ᐹ㻌

㻌 Fig. 1 䛻 Ts=40 K 䛻䛚䛔䛶 Bex=1.3 T ཬ䜃 Bex=1.6 T 䛾䝟䝹

A,B,C-lines.

(a),(b) Bex=1.3 T(c),(d) Bex=1.6 T䝇☢ሙ䜢༳ຍ䛧䛯᫬䛾ᤕᤊ☢ሙศᕸ((a),(c))䛸䛭䛾᩿㠃ᅗ((b),(d))䜢♧䛩䚹Bex=1.3 T 䛾䛸䛝䚸ᤕᤊ☢ሙ䛿࿘㎶㒊䛾䜏䛻ᤕᤊ䛥䜜䚸୰ᚰ㒊䛻䛿ᤕᤊ䛥䜜䛺䛛䛳䛯䚹୍᪉䚸Bex=1.6 T 䛾䛸䛝䝞䝹䜽୰ᚰ䜈䛾☢᮰౵ධ䜢☜ㄆ䛧䛯䚹䜎䛯䚸A,B,C-line 䛷␗䛺䜛ᤕᤊ☢ሙ䛾ᙧ≧䛷䛒䜛䛣䛸䛜䜟䛛䜛䚹䛣䜜䛿䚸୙ᆒ୍䛺䝢䞁Ṇ䜑ຊ䛻䜘䜛☢᮰䛾౵ධ䛸ᤕᤊ䛜ཎᅉ䛷䛒䜛䚹
㻌 Fig. 2 䛻 Ts=50 K 䛻䛚䛔䛶༳ຍ☢ሙ 3 T 䛾䛸䛝䛾☢໬ ᐃ䛛䜙⟬ฟ䛧䛯⮫⏺㟁ὶᐦᗘ Jc (50 K, 3 T)䛾ศᕸ䜢♧䛩䚹
A,B-line 䛾 Jc ศᕸ䛻ᛴ⃭䛺ኚ໬䛿ぢ䜙䜜䛺䛔䚹୍᪉䚸C-line䛿୎ᗘ GSB ୖ䛾 line 䛷䛒䜚 X=-8 mm ௜㏆䛷 Jc ศᕸ䛜኱䛝䛟ቑ኱䛧䛶䛔䜛䛜䚸䛣䜜䛿✀⤖ᬗ䛾఩⨨䛻ᑐᛂ䛧䛶䛔䜛䚹䜎䛯䚸
A,B,C-line 䛾㡰䛻 Jc 䛜ቑ኱䛧䛶䛔䜛䛜䚸䛣䜜䛿䝞䝹䜽స〇᫬䛻䛚䛡䜛⤖ᬗᡂ㛗ᶵᵓ䛾㐪䛔䛛䜙 GSB ୖ䛻䝢䞁Ṇ䜑୰ᚰ䛜㞟୰䛧䛶䛔䜛䛯䜑䛷䛒䜛䚹䛣䜜䜙䛾⤖ᯝ䜢 Fig. 1 䛾ᤕᤊ☢ሙ᩿

Fig. 2 Critical current density Jc distribution㻌 estimated by the㠃ᅗ䛸ẚ㍑䛩䜛䛸䚸Jc ศᕸ䛿ᚲ䛪䛧䜒䝟䝹䝇╔☢䛻䛚䛡䜛ᤕmagnetization method along X axis at 50 K.

― 159 ―

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(Bex=3 T)

2010年度秋季低温工学・超電導学会

2B-a04

酸化物バルク (1)RE123 ⁐⼥จᅛࣂࣝࢡ࡟࠾ࡅࡿ㑏ඖ࣏ࢫࢺ࢔ࢽ࣮ࣝຠᯝ
Effects of Post-Annealing under Reducing Atmospheres on Superconducting Properties ofRE123 Melt-Solidified Bulks㉥ᆏ཭ᖾୗᒣ῟୍ᯂᮧ㝧ᖹᒣᮏ᫂ಖⲶ㔝ᣅᓊᑿග஧ ᮾ኱㝔ᕤ 
AKASAKA Tomoyuki, SHIMOYAMA Jun-ichi, KINEMURA Yohei, YAMAMOTO Akiyasu, OGINO Hiraku,
KISHIO Kohji(Univ. of Tokyo)
E-mail : tt096638@mail.ecc.u-tokyo.ac.jp
࠙⥴ゝࠚ REBa2Cu3Oy(RE123)⁐⼥จᅛࣂࣝࢡ࡟࠾࠸࡚ࡣࠊ✀⤖ᬗ࠿ࡽ㞳ࢀࡿ࡯࡝ TcࠊJc ࡞࡝㉸ఏᑟ≉ᛶࡀຎ໬ࡍࡿሙྜࡀከ
࠸ࠋᡃࠎࡣࡇࡢ≉ᛶపୗࡢ୍ᅉ࡜ࡋ࡚ RE ࡢ Ba ࢧ࢖ࢺ࡬ࡢ⨨᥮ࢆᣦ᦬ࡋ࡚ࡁࡓ[1]ࠋࡇࢀࡲ࡛࡟ࠊࡇࡢ RE ⨨᥮ࡢᢚไ࡟᭷ຠ࡞㑏ඖ㞺ᅖẼୗ࡛ࡢ⤖ᬗ⫱ᡂࡸࠊ㑏ඖ㞺ᅖẼୗ࡛ࡢ࣏ࢫࢺ࢔ࢽ࣮ࣝ㐣⛬ࡢ㏣ຍ࡟ࡼࡗ࡚ࠊY123 ⁐⼥จᅛࣂࣝࢡ࡟࠾࠸࡚✀⤖ᬗ࠿ࡽ㞳ࢀࡓ㒊ศࡢ TcࠊJc ࡢຎ໬ࡀᢚไ
࡛ࡁࠊࣂࣝࢡయ඲యࡢ≉ᛶࡀᨵၿࡋࡓࡇ࡜ࢆሗ࿌ࡋ࡚ࡁࡓ
[2]ࠋᮏ◊✲࡛ࡣࠊ㑏ඖ㞺ᅖẼୗ࡛ࡢ࣏ࢫࢺ࢔ࢽ࣮ࣝࢆ
Gd123, Dy123, Ho123 ⁐⼥จᅛࣂࣝࢡ࡟ࡶ㐺⏝ࡋࠊࣂࣝࢡ
య඲యࡢ㉸ఏᑟ≉ᛶࡢᆒ㉁໬ࢆヨࡳࡓࠋ࡜ࡀศ࠿ࡿࠋ
ㅮ₇࡛ࡣࠊRE123 ⁐⼥จᅛࣂࣝࢡࡢ㑏ඖ࣏ࢫࢺ࢔ࢽ࣮ࣝ
ຠᯝࢆ⥲ྜⓗ࡟㆟ㄽࡍࡿࠋ࠙ᐇ㦂᪉ἲࠚ
 Dy123, Ho123 ⁐⼥จᅛࣂࣝࢡࡣ௨ୗࡢ᪉ἲ࡛స〇ࡋࡓࠋᅛ┦཯ᛂἲ࡟ࡼࡗ࡚స〇ࡋࡓ RE123 ࡜ RE2BaCuO5(RE211)
ࡢ⢊ᮎࢆ 7 : 3 ࡢࣔࣝẚ࡜࡞ࡿࡼ࠺࡟⛗ྲྀࡋ 0.5 wt%ࡢ Ptࢆຍ࠼ΰྜࡋࡓࠋࡇࢀࢆࣉࣞࢫ࡟ࡼࡾ 20 mmI×10 mmt ࡢ࣌ࣞࢵࢺ࡟ᡂᆺࡋࡓࠋ✀⤖ᬗ࡜ࡋ࡚ Nd123 ༢⤖ᬗࢆ࣌ࣞࢵࢺ⾲㠃୰ኸ࡟⨨࠸ࡓᚋࠊ✵Ẽ୰࡟࡚⁐⼥จᅛࢆ⾜ࡗࡓࠋ⁐⼥จᅛࣂࣝࢡࡢ✀⤖ᬗ࠿ࡽືᚄ᪉ྥ࡟ᡂ㛗ࡋࡓa-growth ࠾ࡼࡧୗ᪉࡟ᡂ㛗ࡋࡓ c-growth 㡿ᇦ࠿ࡽษࡾฟ
ࡋࡓ 2 mm2 mm1 mmt ࡢヨᩱ࡟ᑐࡋࠊPO2 = 0.01 atmࠊ850|C ࡛࣏ࢫࢺ࢔ࢽ࣮ࣝࢆ⾜࠸ࠊࡉࡽ࡟ࠊ㓟⣲㔞ไᚚࡢࡓࡵ㓟⣲Ẽὶ୰ࠊ450|C࡛࢔ࢽ࣮ࣝࡋࡓࠋࡲࡓ⮬సヨᩱࡢ࡯࠿࡟ࠊࡼࡾ኱ᆺࡢ 64.5 mmI×20 mmt ࡢ㖟ῧຍ Gd123 ࣂࣝࢡ(స〇 : ᪂᪥㚩)࡟ᑐࡋ࡚ࡶྠᵝ࡟㑏ඖ࣏ࢫࢺ࢔ࢽ࣮
ࣝຠᯝࢆㄪ࡭ࡓࠋษࡾฟࡋࡓヨᩱࡢ㉸ఏᑟ≉ᛶࡣ SQUID☢᮰ィࢆ⏝࠸ࡓ☢໬ ᐃ࡟ࡼࡾホ౯ࡋࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚ
 Fig. 1 ࡟ Dy123, Ho123, Y123 ࣂࣝࢡヨᩱࡢ a-growth 㡿ᇦࡢ✀⤖ᬗ࠿ࡽࡢ㊥㞳ࡀ 2, 4, 6 mm ࡢ㒊ศ࠿ࡽษࡾฟࡋࡓ
ᑠ∦ヨᩱࡢ Tc ࢆ♧ࡍࠋ㑏ඖ࣏ࢫࢺ࢔ࢽ࣮ࣝ㐣⛬ࢆ⤒࡞࠸ヨᩱ࡛ࡣࠊ✀⤖ᬗ࠿ࡽ㞳ࢀࡿ࡯࡝⣔⤫ⓗ࡟ Tc ࡀపୗࡋ࡚
࠸ࡿࠋࡇࢀࡣ✀⤖ᬗ࠿ࡽ㞳ࢀࡓ఩⨨࡯࡝ࠊRE211 ࡢᯒฟ㔞ࡀከࡃ࡞ࡿࡓࡵࠊ⤖ᬗᡂ㛗㐣⛬࡟࠾࠸࡚ RE ࡢ Ba ࢧ࢖ࢺ⨨᥮ࡀಁ㐍ࡉࢀࡓࡓࡵ࡜⪃࠼ࡽࢀࡿࠋ୍᪉࡛ࠊ㑏ඖ࣏ࢫࢺ࢔ࢽ࣮ࣝࢆ⾜࠺ࡇ࡜࡟ࡼࡗ࡚ࠊ≉࡟✀⤖ᬗ࠿ࡽ㞳ࢀࡓ఩⨨࡟࠾࠸࡚ Tc ࡀᨵၿࡋࡓࠋࡇࢀࡣࠊ㑏ඖ㞺ᅖẼୗ࡛ࡢ࣏ࢫ
ࢺ࢔ࢽ࣮ࣝ㐣⛬࡟࠾࠸࡚ Ba ࢧ࢖ࢺࡢ RE ⨨᥮㔞ࡀపୗࡋࡓࡓࡵ࡜⪃࠼ࡽࢀࡿࠋ࠸ࡎࢀࡢ RE ࡟࠾࠸࡚ࡶ Tc ࡟ୖ᪼ࡀぢࡽࢀࡿࡀࠊୖ᪼ᖜࡣᕪ␗ࡀ࠶ࡿࡓࡵࠊRE ඖ⣲࡟ᛂࡌࡓ㑏ඖ࣏ࢫࢺ࢔ࢽ࣮ࣝ᮲௳ࡢ᭱㐺໬ࢆࡍࡿᚲせࡀ࠶ࡿࠋFig. 2 ࡟ᵝࠎ࡞᮲௳࡛㑏ඖ࣏ࢫࢺ࢔ࢽ࣮ࣝࢆ⾜ࡗࡓ㖟ῧຍ Gd123 ࣂࣝࢡヨᩱࡢ 77 K ࡟࠾ࡅࡿ Fp, max ࢆ♧ࡍࠋ㑏ඖ࣏ࢫࢺ࢔ࢽ࣮ࣝࢆ㏣ຍࡋࡓヨᩱ࡛ࡣࠊ࡯࡜ࢇ࡝ࡢ᮲௳࡛
Fp, max ࡀୖ᪼ࡋࡓࠋPO2 ࡀప࠸ 0.001 atm ࡛ࡣࠊ᭱ࡶ Fp, maxࡀ㧗࠸࣏ࢫࢺ࢔ࢽ࣮ࣝ ᗘࡀప ഃ࡟ࢩࣇࢺࡋ࡚࠸ࡿࡇ

Fig. 1 Tc of small pieces cut from various parts of Dy, Ho,
Y123 melt-solidified bulks with and without annealing
process under reducing atmospheres.

Fig. 2 Fp,max of Gd123 melt-solidified bulks without
and with annealing process under various temperatureand reducing atmospheres.
[1] J. Shimoyama et al., Abstracts of CSJ Conference, vol. 80(2009) p.109[2] T. Akasaka et al., Abstracts of CSJ Conference, vol. 82(2010) p.210― 160 ―

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2010年度秋季低温工学・超電導学会

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酸化物バルク (1)ᕼⷧ䝗䞊䝢䞁䜾䛻䜘䜛㧗ᤕᤊ☢ሙ 㻾㻱㻝㻞㻟 ⁐⼥จᅛ䝞䝹䜽䛾㛤Ⓨ㻌㻰㼑㼢㼑㼘㼛㼜㼙㼑㼚㼠㻌㼛㼒㻌㻾㻱㻝㻞㻟㻌㻹㼑㼘㼠㻙㻿㼛㼘㼕㼐㼕㼒㼕㼑㼐㻌㻮㼡㼘㼗㼟㻌㼣㼕㼠㼔㻌㻴㼕㼓㼔㻌㻲㼕㼑㼘㼐㻌㼀㼞㼍㼜㼜㼕㼚㼓㻌㻼㼞㼛㼜㼑㼞㼠㼕㼑㼟㻌㼎㼥㻌㻰㼕㼘㼡㼠㼑㻌㻵㼙㼜㼡㼞㼕㼠㼥㻌㻰㼛㼜㼕㼚㼓㻌ᯂᮧ㝧ᖹࠊ㉥ᆏ཭ᖾࠊୗᒣ῟୍ࠊᒣᮏ᫂ಖࠊⲶ㔝ᣅࠊᓊᑿග஧KINEMURA Yohei, AKASAKA Tomoyuki, SHIMOYAMA Jun-ichi, YAMAMOTO Akiyasu, OGINO Hiraku and KISHIO Kohji(Univ. of Tokyo)
E-mail : tt106658@mail.ecc.u-tokyo.ac.jp㻝㻚㻌 䛿䛨䜑䛻
RE123(REBa2Cu3Oy)⁐⼥จᅛࣂࣝࢡయࡢᤕᤊ☢ሙ≉ᛶྥୖ࡟ࡣࠊ⮫⏺㟁ὶ≉ᛶࡢᨵၿࡀ୙ྍḞ࡛࠶ࡿࠋࡑࡢࡓࡵ
࡟᭷ຠ࡞ᡭẁ࡜ࡋ࡚ࡣ RE211 ᯒฟ≀ࡢᚤ⣽໬ࡸ RE ࡢ୍㒊ࡀ Ba ࢧ࢖ࢺ࡟⨨᥮࡛ࡁࡿ୰㍍ᕼᅵ㢮ඖ⣲ࡢ౑⏝ࡀࡼࡃ▱ࡽࢀ࡚࠸ࡿࡀࠊᕼⷧ୙⣧≀ࢻ࣮ࣉ࡟ࡼࡿࣆࣥࢽࣥࢢࢭࣥࢱ
࣮ࡢᑟධࡀ⮫⏺㟁ὶ≉ᛶᨵၿ࡟᭷ຠ࡛࠶ࡿࡇ࡜ࢆᡃࠎࡣ
ሗ࿌ࡋ࡚ࡁࡓ[1,2]ࠋ࡞࠿࡛ࡶࠊCuO 㙐ࡢ Cu ࡟ᚤ㔞ࡢ Fe, Co,
Ga ࢆࢻ࣮ࣉࡋࡓሙྜ࡟ࡣࠊCuO2 㠃࠿ࡽ㞳ࢀࡓᒁᡤ࡛᱁Ꮚ
ࡀṍࡳࠊCuO2 㠃ࡀࢡ࣮ࣜࣥ࡟ಖࡓࢀࡿࡓࡵ Tc ࡀపୗࡏࡎ
Jc ࡀ኱ࡁࡃᨵၿࡍࡿ [2]ࠋࡋ࠿ࡋࠊࡇࢀࡲ࡛ࡇࢀࡽ୙⣧≀ࢆᕼⷧࢻ࣮ࣉࡋࡓ RE123 ⁐⼥จᅛࣂࣝࢡࡢᤕᤊ☢ሙ≉ᛶࡢホ౯ࡣ⾜ࡗ࡚࠸࡞࠿ࡗࡓࠋࡑࡇ࡛ࠊᮏ◊✲࡛ࡣ Co ࡸ
Ga ࢆᕼⷧࢻ࣮ࣉࡋࡓ Y123 ⁐⼥จᅛࣂࣝࢡࢆస〇ࡋࠊࡇࢀࡽࡢᤕᤊ☢ሙ≉ᛶࢆㄪ࡭ࡓࠋࡉࡽ࡟ࣂࣝࢡయࡢᵝࠎ࡞ሙᡤ࠿ࡽษࡾฟࡋࡓᑠ∦ࡢ Tc ࡸ⮫⏺㟁ὶ≉ᛶ࡟ࡘ࠸࡚ࡶ⣔⤫ⓗ࡟ホ౯ࡋࡓࠋ

ࡗࡓࠋࡇࢀࡣ Co ࠾ࡼࡧ Ga ࢻ࣮ࣉ࡟ࡼࡗ࡚ࣂࣝࢡ඲యࡢ
Jc ࡀᨵၿࡉࢀࡓࡇ࡜ࢆ཯ᫎࡋࡓ⤖ᯝ࡛࠶ࡿࠋ

Fig. 1 Tconset of undoped, Co- and Ga-doped Y123 melt
solidified bulks determined by susceptibility measurements.

㻞㻚㻌 ᐇ㦂᪉ἲ㻌ࣀࣥࢻ࣮ࣉ࠾ࡼࡧ CuO 㙐ࡢ Cu ࢧ࢖ࢺ࡟ Co ࠾ࡼࡧ Ga
ࢆ 1.5 mol㸣ࢻ࣮ࣉࡋࡓ Y123 ࡜ Y211 ⢊ᮎࢆᅛ┦཯ᛂἲ࡟ࡼࡾྜᡂࡋࡓࠋY123㸸Y211 = 7㸸3 ࡢࣔࣝẚ࡟࡞ࡿࡼ࠺࡟
⛗㔞ࡋ Pt ࢆ 0.5 wt%ຍ࠼࡚ΰྜࡋࡓᚋࠊ୍㍈ࣉࣞࢫ(1 ton /cm2)࡟ࡼࡗ࡚ 20 mmI10 mmt ࡲࡓࡣ 26 mmI21 mmt ࡢ࣌ࣞࢵࢺ࡟ᡂᆺࡋࡓࠋNd123 ༢⤖ᬗࢆ✀⤖ᬗ࡟⏝࠸✵Ẽ୰࡛⁐⼥จᅛࡋࡓᚋࠊ㓟⣲Ẽὶ୰ 450°C ࡛࣏ࢫࢺ࢔ࢽ࣮ࣝࢆ
⾜ࡗࡓࠋ✀⤖ᬗ࠿ࡽືᚄ᪉ྥࡢ a-growth region ࡜✀⤖ᬗ┤ୗ᪉ྥࡢ c-growth region ࠿ࡽ 2 mm2 mm1 mm ࡟ษࡾฟࡋࡓヨᩱ࡟ᑐࡋࠊSQUID ࡟ࡼࡿ☢໬ ᐃ࠿ࡽ㉸ఏᑟ≉ᛶࡢホ౯ࢆ⾜ࡗࡓࠋࡲࡓࠊࣂࣝࢡ඲యࢆ 77 K ࡲ࡛☢ሙ୰෭༷ࡋእ㒊☢ሙࢆࢮࣟ࡜ࡋࡓᚋࠊ㉮ᰝᆺ࣮࣍ࣝࣉ࣮ࣟࣈࢆ
⏝࠸࡚ࣂࣝࢡ⾲㠃࠿ࡽ 0.5 mm ୖࡢᤕᤊ☢ሙศᕸࢆㄪ࡭ࡓࠋ㻟㻚㻌 ⤖ᯝ䛸⪃ᐹ㻌Co ࠾ࡼࡧ Ga ࢆ 1.5㸣ࢻ࣮ࣉࡋࡓ⤌ᡂ࡟࠾࠸࡚ࡶࢩࣥࢢ
ࣝࢻ࣓࢖ࣥ࠿ࡽᡂࡿ Y123 ⁐⼥จᅛࣂࣝࢡࡀᚓࡽࢀࡓࠋ
Co ࡸ Ga ࡢࢻ࣮ࣉࡣ CuO2 㠃ࢆ┤᥋஘ࡉ࡞࠸ࡓࡵࠊFig. 1࡟♧ࡋࡓࡼ࠺࡟ᮏ◊✲࡛స〇ࡋࡓ⁐⼥จᅛࣂࣝࢡయ࡟࠾
࠸࡚ࡶ Tc ࡀపୗࡋ࡞࠸ࡇ࡜ࢆ☜ㄆࡋࡓࠋࡲࡓࠊa-growth
regionࠊc-growth region ࡜ࡶ࡟ Co ࡸ Ga ࡢࢻ࣮ࣉ࡟ࡼࡗ࡚
඲☢ሙ㡿ᇦ࡛ Jc ࡀᨵၿࡋࡓࠋFig. 2 ࡟ 77 K ࡟࠾ࡅࡿࣀࣥ
ࢻ࣮ࣉ࠾ࡼࡧ Ga ࢆ 1.5%ࢻ࣮ࣉࡋࡓ Y123 ࣂࣝࢡࡢᤕᤊ☢
ሙศᕸࢆ♧ࡋࡓࠋヨᩱࢧ࢖ࢬࡣ 21.5 mmI18 mmt ࡛᭱㧗ᤕᤊ☢ሙࡣ Co1.5%⨨᥮ヨᩱ࡛ 0.47 TࠊGa1.5%⨨᥮ヨᩱ࡛
0.58 T ࡜ࠊࣀࣥࢻ࣮ࣉヨᩱࡢ 0.38 T ࡼࡾࡶ㧗࠸ࡇ࡜ࡀࢃ࠿

(a)

77 K
H // c(b)

77 K
H // cFig. 2 Trapping field distribution of Y123 melt solidified
bulks at 77 K. (a):undoped, (b):Ga1.5% dopedཧ⪃ᩥ⊩㻌[1] J. Shimoyama et al.,IEEE Trans. Appl. Supercond. 15(2005) 3778-3781.
[2] Y. Ishii et al., Appl. Phys. Lett. 89 (2006) 202514.

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第83回

2010年度秋季低温工学・超電導学会

2B-a06

酸化物バルク (1)☢ᛶ⢏Ꮚῧຍ䛻䜘䜛 㻳㼐 ⣔⁐⼥ᡂ㛗䝞䝹䜽㉸㟁ᑟయ䛾㻌ᤕᤊ☢᮰ቑ኱䛻㛵䛩䜛◊✲㻌㻱㼚㼔㼍㼚㼏㼑㼙㼑㼚㼠㻌㼛㼒㻌㼠㼔㼑㻌㼠㼞㼍㼜㼜㼑㼐㻌㼙㼍㼓㼚㼑㼠㼕㼏㻌㼒㼘㼡㼤㻌㼕㼚㻌㻳㼐㻝㻞㻟㻌㼎㼡㼘㼗㻌㼟㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼛㼞㼟㻌

4

2

JC (10 A/cm )㻌㒔⠏㻌 ၨኴ䠈ཎ㻌 ❶࿃䠈୕ᮌ㻌 ᇶᐶ䠈䝣䜵䝹䝎䞊㻌 䝤䝸䞊䝇䠈㒭㻌 ⮬๛䠈࿴Ἠ㻌 ඘㻌 䠄ᮾிᾏὒ኱䠅㻌㼀㻿㼁㼆㼁㻷㻵㻌㻷㼑㼕㼠㼍㻘㻌㻴㻭㻾㻭㻌㻿㼔㼛㼓㼛㻘㻌㻹㻵㻷㻵㻌㻹㼛㼠㼛㼔㼕㼞㼛㻘㻌㻲㻱㻸㻰㻱㻾㻌㻮㼞㼕㼏㼑㻘㻌㻰㻱㻺㻳㻌㼆㼕㼓㼍㼚㼓㻘㻌㻵㼆㼁㻹㻵㻌㻹㼕㼠㼟㼡㼞㼡䠄㼀㼁㻹㻿㻭㼀䠅㻌㻱㻙㼙㼍㼕㼘㻦㻌㼐㻝㻜㻞㻜㻝㻡㻬㼗㼍㼕㼥㼛㼐㼍㼕㻚㼍㼏㻚㼖㼜㻌 㻌㻌㻝䠊䛿䛨䜑䛻㻌
5ᕼᅵ㢮⣔䝞䝹䜽㧗 ㉸㟁ᑟయ䠄㻾㻱㻙㻮㼍㻙㻯㼡㻙㻻䠅䛿㧗䛔⮫⏺
C1 without addition
B1 without addition㟁ὶᐦᗘ≉ᛶ䠄㻶㼏䠅䛻ຍ䛘䛶⮫⏺ ᗘ≉ᛶ䠄㼀㼏䠅䜢᭷䛧䛶䛚䜚䚸C1 0.4 mol%Fe-B-Si-Nb-Cr-Cu╔☢䛻䜘䜛ᙉ☢ሙ䜢฼⏝䛧䛯ᵝ䚻䛺ᛂ⏝䛜ᮇᚅ䛥䜜䛶䛔䜛䚹
4
B1 0.4 mol%Fe-B-Si-Nb-Cr-Cu㏆ᖺ䛷䛿ᕼᅵ㢮⣔䛾䝞䝹䜽య䛻䛚䛔䛶䜘䜚㧗䛔 㻶㼏 䜢ᚓ䜛᪉ἲ
C1 0.2 mol%Fe2O3 0.2 mol%䛸䛧䛶䚸⁐⼥⤖ᬗᡂ㛗๓䛾๓㥑య䛻㠀㉸㟁ᑟ⢏Ꮚ䜢ᚤ㔞䛻
B1 0.2 mol%Fe2O3 0.2 mol%ῧຍ䛩䜛ᡭἲ䛜ᣲ䛢䜙䜜䛶䛔䜛㼇㻝㼉䚹㻶㼏 䜢ቑຍ䛩䜛䛣䛸䛾䛷䛝䜛3ຠᯝⓗ䛺ῧຍ⢏Ꮚ䛾᥈⣴䛜ᚲせ䛷䛒䜛䛣䛸䛜ゝ䛘䜛䚹ᡃ䚻䛾䜾䝹䞊䝥䛷䛿☢ᛶ䜢䜒䛳䛯ᛴ෭ྜ㔠䛾୍✀䛷㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ⢏Ꮚ䜢 㻳㼐 ⣔䝞䝹䜽㧗 ㉸㟁ᑟయ䛻ῧ
2ຍ䛩䜛䛣䛸䛻䜘䜚 㻶㼏 䜢ྥୖ䛥䛫䜛䛣䛸䛻ᡂຌ䛧䛶䛔䜛㼇㻞㻘㻟㼉䚹ᮏ◊✲䛷䛿 㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ⢏Ꮚ䜢ῧຍ䝞䝹䜽䚸㻲㼑㻞㻻㻟 䜢ᚤ1㔞ῧຍ䛧䛯䝞䝹䜽య䜢䛭䜜䛮䜜స〇䛧䚸ヨᩱ䛾 㻶㼏 䛸ᤕᤊ☢᮰䜢ẚ㍑䛧䚸㐺䛧䛯ῧຍ⢏Ꮚ䛸㉁㔞䜢᳨ウ䛧䛯䚹䛥䜙䛻䛭䛾⤖ᯝ䜢⏝䛔䛶 䃥㻠㻢 䛾䝞䝹䜽య䜢స〇䚸ホ౯䛧䛯⤖ᯝ䜢ሗ࿌䛩䜛䚹㻌
0
㻌
0
1
2
3
4
5
㻞䠊ᐇ㦂᪉ἲ㻌

Magnetic field (T)Fig. 1 The magnetic field dependence of Jc with

Magnetic Flux in ṳ10 mm bulk ( ᷈Wb)

different particles and in different positions

ṳ10 mm Fe-B-Si-Nb-Cr-Cu
ṳ10 mm Fe2O3
᷑46 mm Fe-B-Si-Nb-Cr-Cu

8

650

600
7
550

6
5

500

4
0.0

0.4
0.8
1.2
Fe-B-Si-Nb-Cr-Cu (mol%)

1.6

0.0

0.2

0.8

0.4
0.6
Fe2O3 (mol%)

Magnetic Flux in ᷑46 mm bulk ( ᷈Wb)

㻳㼐㻙㻮㼍㻙㻯㼡㻙㻻 䝞 䝹 䜽 య 䛻 ῧ ຍ 䛩 䜛 䛯 䜑 䛻 ᕷ ㈍ 䛾㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ⢏ Ꮚ 䛸 㻲㼑㻞㻻㻟 ⢏ Ꮚ 䜢 ‽ ഛ 䛧 䛯 䚹㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ⢏Ꮚῧຍ䝞䝹䜽䛾ሙྜ䚸䛭䛾⤌ᡂẚ䜢㻳㼐㻙㻝㻞㻟㻌 㻗㻌 㻠㻜㻌 㼙㼛㼘㻑㻌 㻳㼐㻙㻞㻝㻝㻌 㻗㻌 㼄㻌 㼙㼛㼘㻌 㻑㻌 㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡㻌䠄䛯䛰䛧 㼄㻌㻩㻌㻜㻚㻜㻘㻌㻜㻚㻞㻌䈈㻌㻝㻚㻠䠅䛸䛧䚸䛣䜜䜙䜢 㼅㻞㻻㻟㻌㻙㻌㼆㼞㻻㻞 ᐜჾ䜢⏝䛔䛶ΰྜ䛧䛯䚹㻲㼑㻞㻻㻟 ⢏Ꮚῧຍ䝞䝹䜽䛷䛿 㼄㻌㻩㻌㻜㻚㻜㻘㻌㻜㻚㻝㻘㻌㻜㻚㻞㻘㻌㻜㻚㻠㻘㻌㻜㻚㻤 䛸䛧䛯䚹⢊ᮎ䜢⮬ືΰᡂᶵ䛻䜘䜚 㻞 ᫬㛫ΰྜ䛧䛯ᚋ䛻䚸୍㍈䝥䝺䝇䜢⏝䛔䛶┤ᚄ 㻞㻜㻌㼙㼙 䛻ᡂᙧ䛧䛯䚹䛭䛾ᚋ䚸㧗 ⅔
䜢⏝䛔䛶 㻴㼛㼠㻙㼟㼑㼑㼐㼕㼚㼓 ἲ䛻䜘䜛⁐⼥⤖ᬗᡂ㛗䜢⾜䛳䛯䚹✀⤖ᬗ䛻䛿 㻺㼐㻝㻞㻟 ༢⤖ᬗ䜢⏝䛔䛯䚹䜎䛯⤖ᬗᡂ㛗ᚋ䛻㓟⣲䜰䝙䞊䝹ฎ⌮䜢᪋䛧䛯䚹㻌㻌㻟䠊ᐇ㦂⤖ᯝ㻌ᅗ 㻝 䛻 㻶㼏 䛾 ☢ ሙ ౫ Ꮡ ᛶ 䜢 ♧ 䛩 䚹 㻜㻚㻠㻌 㼙㼛㼘㻑㻌㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ῧຍ䚸ཬ䜃 㻜㻚㻞㻌 㼙㼛㼘㻑㻌 㻲㼑㻞㻻㻟㻌 ῧຍ䛧䛯䝞䝹䜽య䛷䛿䚸✀┤ୗヨᩱ䠄㻯㻝䠅䛻᪊䛔䛶ⴭ䛧䛔 㻶㼏 䛾ቑ኱䛜ぢ䜙䜜䜛䚹㻳㻿 ୖヨᩱ䠄㻮㻝䠅䛻᪊䛔䛶䛿 㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ⢏Ꮚῧຍヨᩱ䛷䛿 㻶㼏 䛜ቑ኱䛧䛶䛔䜛䛾䛻ᑐ䛧䚸㻲㼑㻞㻻㻟 䛾ሙྜ䛷䛿ᙉ໬䛜ぢ䜙䜜䛺䛔䚹㻌ᅗ 㻞 䛻 㻝㻜㻌 㼙㼙 ゅ䛻ᩚᙧ䛥䜜䛯䝞䝹䜽య䛜ᤕᤊ䛧䛯⥲☢᮰䛾ῧຍ㔞౫Ꮡᛶ䜢♧䛩䠄ᅗ୰䕿ཬ䜃䕕䠅䚹᭱኱ᤕᤊ☢᮰ᐦᗘ 䛿 ↓ ῧ ຍ ヨ ᩱ 䛜 㻜㻚㻝㻝㻌 㼀 䛰 䛳 䛯 䛾 䛻 ᑐ 䛧 䚸 㻜㻚㻠㻌 㼙㼛㼘㻑㻌㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ῧຍ䚸ཬ䜃 㻜㻚㻞㻌㼙㼛㼘㻑㻌㻲㼑㻞㻻㻟 ῧຍ䜢⾜䛳䛯䝞䝹䜽య䛷䛿୧⪅䛸䜒 㻜㻚㻝㻢㻌 㼀 䛸䛺䜚↓ῧຍ䛸ẚ㍑䛧䛶 㻟㻝䠂ྥୖ 䛩 䜛 ⤖ ᯝ 䛸 䛺 䛳 䛯 䚹 ୍ ᪉ ⥲ ☢ ᮰ 䛻 䛚 䛔 䛶 䚸 㻜㻚㻠㻌 㼙㼛㼘㻑㻌㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ⢏Ꮚῧຍ䛿↓ῧຍ䛸ẚ䜉 㻠㻜䠂ྥୖ䛧䚸㻲㼑㻞㻻㻟 ῧຍヨᩱ䛾ሙྜ䛸ẚ䜉䛶ቑຍ㔞䛜ከ䛟䛺䜛⤖ᯝ䛸䛺䛳䛯䚹䛣䜜䛿 㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ⢏Ꮚῧຍ䛻䜘䛳䛶䚸✀┤ୗ䛰䛡䛷䛺䛟 㻳㻿 ୖ䛷䜒 㻶㼏 䛜ྥୖ䛧䛯ᜠᜨ䛷䛒䜛⪃䛘䜙䜜䜛䚹㻌䛣䛾⤖ᯝ䜢㋃䜎䛘䚸┤ᚄ 㻠㻢㻌 㼙㼙 䛾 㻲㼑㻙㻮㻙㻿㼕㻙㻺㼎㻙㻯㼞㻙㻯㼡 ⢏Ꮚῧຍ 㻳㼐 䝞䝹䜽య䜢స〇䛧䛯䚹ᤕᤊ☢᮰ᐦᗘ ᐃ䛾⤖ᯝ䚸䖷 䠅䛻♧䛩䜘䛖䛻 㻜㻚㻠㻌 㼙㼛㼘㻑䛷⥲☢᮰䛾䝢䞊䜽䛜☜ㄆᅗ䠎䠄ᅗ୰䕿
䛥䜜䛯䚹䛣䜜䛿 㻝㻜㻌㼙㼙 ゅ䝃䞁䝥䝹䛷ᚓ䜙䜜䛯ഴྥ䛸Ⰻ䛟୍⮴䛧䛯⤖ᯝ䛷䛒䜛䚹䛣䜜䜙ᐇ㦂⤖ᯝ䛾ヲ⣽䛻䛴䛔䛶䛿ᙜ᪥ሗ࿌䛩䜛䚹㻌

Fig. 2 The integrated magnetic flux dependence onamount of each magnetic particle
ㅰ㎡㻌
䛣䛾◊✲䛾୍㒊䛿⛉◊㈝⿵ຓཬ䜃➲ᕝ⛉Ꮫ◊✲ຓᡂ䛾ᨭ᥼䜢ᚓ䛶⾜䜟䜜䛯䚹኱ᆺヨᩱ䛾ホ౯䜢⾜䛖㝿䚸ᛌ䛟ᥦ౪䛧䛶㡬䛔䛯᪂᪥ᮏ〇㚩ᰴᘧ఍♫䛾ᡭᔱⱥ୍Ặ䚸᳃⏣඘Ặ䛻ឤㅰ䛾ព䜢⾲䛩䚹㻌ཧ⪃ᩥ⊩㻌㼇㻝㼉㻌 㻹㻚㻌 㻹㼡㼞㼍㼘㼕㼐㼔㼍㼞㻌 㼑㼠㻌 㼍㼘㻚㻘㻌 㻼㼔㼥㼟㼕㼏㼍㻌 㻯㻦㻌 㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼢㼕㼠㼥㻘㻌㻟㻣㻤㻙㻟㻤㻝㻘㻼㼍㼞㼠㻌㻝㻌㻢㻞㻣㻙㻢㻟㻜㻌㻔㻞㻜㻜㻞㻕㻌㼇㻞㼉㻌 㼅㻌㼄㼡㻌㼑㼠㻌㼍㼘㻚㻘㻌㻿㼡㼜㼑㼞㼏㼛㼚㼐㻚㻌㻿㼏㼕㻚㻌㼀㼑㼏㼔㼚㼛㼘㻚㻘㻌㻞㻞㻞㻌㻜㻥㻡㻜㻜㻥㻌㻔㻞㻜㻜㻥㻕㻌㼇㻟㼉㻌 㼅㻌㼄㼡㻌㼑㼠㻌㼍㼘㻚㻘㻌㻼㼔㼥㼟㼕㼏㼍㻌㻯㻦㻌㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼢㼕㼠㼥 , 㻠㻣㻜㻘㻌㻵㼟㼟㼡㼑㻌㻞㻜㻘㻌㻝㻞㻝㻥㻙㻝㻞㻞㻟㻌㻔㻞㻜㻝㻜㻕㻌― 162 ―

第83回

2010年度秋季低温工学・超電導学会

2B-a07㧗

酸化物バルク (1)㉸ఏᑟࣂࣝࢡ☢ᴟ⿦⨨࡟Ⓨ⏕ࡍࡿ㟼☢ሙࢆ⏝࠸ࡓỌஂ☢▼ࡢ╔☢ᢏ⾡

0DJQHWL]LQJWHFKQLTXHIRUSHUPDQHQWPDJQHWVE\LQWHQVHVWDWLFILHOGVJHQHUDWHGE\+76
EXONPDJQHWV䠆ᕝᓮ㻌 ಙ㝯 䠈ᮧ㇂㻌 ▱ᶞ㻘ᑠᕝ㻌 ⣧㻘⚟஭㻌 ⪽㻘బ⸨㻌 Ꮥ㞝㻘㻌㻌 ᒸ㻌 ᚭ㞝㻌 㻔᪂₲኱Ꮫ㻕㻌 ఀ⸨㻌 ెᏕ㻘ᑎἑ㻌 ಇஂ䠄䜲䝮䝷ᮦ◊䠅㻌㻺㼛㼎㼡㼠㼍㼗㼍㻌㼗㼍㼣㼍㼟㼍㼗㼕㻘㼀㼛㼙㼛㼗㼕㻌㻹㼡㼞㼍㼥㼍㻘㼅㼡㼠㼍㼗㼍㻌㻴㼕㼞㼛㼟㼑㻘㻶㼡㼚㻌㻻㼓㼍㼣㼍㻘㻿㼍㼠㼛㼟㼔㼕㻌㻲㼡㼗㼡㼕㻘㼀㼍㼗㼍㼚㼛㻌㻿㼍㼠㼛㻘㻌㼀㼑㼠㼟㼡㼛㻌㻻㼗㼍㻌㻔㻺㼕㼕㼓㼍㼠㼍㻌㼁㼚㼕㼢㼑㼞㼟㼕㼠㼥㻕㻌 㼅㼛㼟㼔㼕㼠㼍㼗㼍㻌㻵㼠㼛㻘㼀㼛㼟㼕㼔㼕㼟㼍㻌㼀㼑㼞㼍㼟㼍㼣㼍㻔㻵㻹㻾㻭㻌㻹㻭㼀㻱㻾㻵㻭㻸㻌㻾㻒㻰㻕ࡣࡌࡵ࡟
䛣䜜䜎䛷ᡃ䚻䛾◊✲䜾䝹䞊䝥䛷䛿䚸㧗 ㉸㟁ᑟయ䝞䝹䜽☢▼䛛䜙Ⓨ䛫䜙䜜䜛㟼☢ሙ䜢⏝䛔䛶䚸ᕼᅵ㢮☢▼䜈䛾╔☢ᐇ㦂䜢⾜䛳䛶䛝䛯䚹ᕼᅵ㢮☢▼䜈䛾╔☢ᐇ㦂䛷䛿䚸☢▼⾲㠃䛻 㻺 ᴟ䠄䜎䛯䛿 㻿 ᴟ䠅䛾༢ᴟ╔☢䜔䠔ᴟ䛾╔☢䛻ᡂຌ䛧䛶䛔䜛䚹௒ᅇᡃ䚻䛿╔☢ᑐ㇟䜢ᕼᅵ㢮䛻ẚ䜉ṧ␃☢᮰ᐦᗘ䛾ప䛔䝣䜵䝷䜲䝖☢▼䛻䝞䝹䜽☢▼䜢⏝䛔䛯╔☢䜢᪋䛧䚸䛣䜜䜎䛷ᕼᅵ㢮☢▼䜈䛾╔☢䛷ᚓ䜙䜜䛯ᐇ㦂⤖ᯝ䛸ẚ㍑䛧䛺䛜䜙☢▼ᮦᩱ䞉ᛶ⬟䛻㐺䛧䛯╔☢᪉ἲ䜢ㄪᰝ䛧䛯䚹䛣䜜䜎䛷䛾ᕼᅵ㢮☢▼䛾╔☢䛷䛿 㻞㻚㻡㼀௨ୖ䛾☢ሙ䛜ᚲせ䛺䜒䛾䛾䚸䛭䛾㧗䛔ಖᣢຊ䛻䜘䜚╔☢᫬䛾ῶ☢ຠᯝ䜢⪃៖䛧䛺䛟䛶䜒ᐜ᫆䛻☢ᴟ䜢ᙧᡂ䛧䛶䛔䛯䚹䛧䛛䛧䝣䜵䝷䜲䝖☢▼䛷䛿䚸䝞䝹䜽☢ᴟእ࿘䛻Ⓨ⏕䛧䛶䛔䜛㏫☢ሙ䛻䜘䜚ᛮ䛖䜘䛖䛺☢ᴟ䜢ᚓ䜛䛣䛸䛜㞴䛧䛔䛣䛸䛜ᐇ㦂䛛䜙ุ᫂䛧䛯䚹㻌 ௒ᅇ䛿䝣䜵䝷䜲䝖☢▼㻔㻝㻜㻜㽢㻝㻜㻜㽢㻡㼙㼙㻟㻕ヨᩱ䛻㟼☢ሙ╔☢䜢᪋䛧䚸ヨᩱ⾲㠃䛻╔☢䛥䜜䛯☢ᴟ䜢 ᐃ䛧䛯䚹㻌

GM refrigerator

Magnetic poles

Magnetic field

Thermometer

Compress

Fig.1 The HTS bulk magnet system with Sm123 formagnetizing experiments.
    ᐇ㦂᪉ἲ

HTS bulk  Permanent magnet╔☢ᐇ㦂䛻䛿 㻲㼕㼓㻚㻝 䛾 㻳㻹 䝃䜲䜽䝹෭෾ᶵ䠄䜰䜲䝅䞁⢭ᶵ〇䚸㻳㻰㻝㻜㻝㻿䠅䜢⏝䛔䛯ᑐྥᆺ䛾☢ᴟ⿦⨨䛷䚸䝞䝹䜽☢▼䜢ྥ䛛䛔ྜ䛖⟄≧䛾䝏䝱䞁䝞䞊ෆ䛻ᤣ䛘௜䛡䚸䛭䛾⾲㠃䛻䛿 㻺 ᴟ䠄ྑ䠅䛻㻟㻚㻠㻞㼀䚸㻿 ᴟ䠄ᕥ䠅䛻 㻟㻚㻞䠓㼀 䛾☢ሙ䜢ᤕᤊ䛧䛯䚹ヨᩱ䛻䛿䝣䜵䝷䜲䝖☢▼㻔㻝㻜㻜㽢㻝㻜㻜㽢㻡㼙㼙㻟㻕䜢⏝䛔䛯䚹㻌㻌 ☢ᴟ⿦⨨䜢⏝䛔䛶Ọஂ☢▼⾲㠃䜢㉮ᰝ䛧䛶╔☢䛥䜜䛯☢ሙศᕸ䜢 ᐃ䛧䛯䚹㉮ᰝ㌶㊧䛿䚸䐟ᶓ୍ᩥᏐ 㻝 ᅇ䚸䐠୰ኸ䝇䝍䞁䝥 㻝ᅇ䐡඲㠃㉮ᰝ䛾 㻟 ✀㢮䛾╔☢ᐇ㦂䜢⾜䛳䛯䚹㻲㼕㼓㻚㻞 䛻䛿䐟ᶓ୍ᩥᏐ 㻝 ᅇ䛾㉮ᰝ㌶㊧䛸ヨᩱ⾲㠃䛸䛾㛵ಀ䜢♧䛩䚹䛭䛾ᚋ䝩䞊䝹䝉䞁䝃䞊䛻䜘䜛☢ሙศᕸ ᐃ⿦⨨䠄㻲㻚㼃㻚䝧䝹♫〇䚸㻮㻴㼀㻥㻞㻜䠅䛷ヨᩱ䛾☢ሙศᕸ䜢 ᐃ䛧䛯䚹㻌㻌N
Scan line
Fig.2 The scanning position of permanent magnet.

ᐇ㦂⤖ᯝ࡜⪃ᐹ 㻲㼕㼓㻚㻟 䛻䛿䝣䜵䝷䜲䝖☢▼⾲㠃䛻╔☢䛥䜜䛯☢ᴟ䛾ᵝᏊ䜢♧䛩䚹㉸ఏᑟ䝞䝹䜽☢▼䛻䛿☢ᴟ୰ኸ䛻䃥㻌 㻢㻜㻌 㼙㼙 䛾⠊ᅖ䛻 㻜㻚㻡㼀 䛾☢ሙ䛜ᤕᤊ䛥䜜䛶䛔䜛䚹䛧䛛䛧䝞䝹䜽☢▼እ࿘䛻఩⨨䛩䜛㒊ศ䛻䛿╔☢᪉ྥ䛸䛿㏫᪉ྥ䛻☢ሙ䛜ᙧᡂ䛥䜜䛶䛔䜛䛯䜑䚸䝣䜵䝷䜲䝖☢▼䛿୰ኸ㒊ศ䛸䛿཯ᑐ᪉ྥ䛻╔☢䛥䜜䛶䛔䜛䚹䜎䛯୰ኸ䛾ṧ␃☢ሙ䜒㉮ᰝ᫬䛻ῶ☢䛥䜜㉸㟁ᑟ䝬䜾䝛䝑䝖䛻䜘䜛╔☢䛻ẚ䜉኱䛝䛟ῶ☢䛥䜜䛶䛔䜛䛣䛸䛜☜ㄆ䛥䜜䛯䚹䐠୰ኸ䝇䝍䞁䝥 㻝ᅇ䐡඲㠃㉮ᰝ䛾╔☢⤖ᯝ䛿Ⓨ⾲᫬䛻ሗ࿌䛩䜛䚹MagneƟc Flux Density(T)0.02௒ᚋࡢィ⏬
SPM ࣮ࣔࢱ➼࡟฼⏝ࡉࢀ࡚࠸ࡿ⎰ᙧ≧Ọஂ☢▼࡟╔☢
ࢆ᪋ࡋ╔☢ゎᯒᚋࠊ࣮ࣔࢱ࡟⿦╔ࡋసືᐇ㦂ࢆ⾜࠺ࠋFeriite magnet

Bulk magnet

0.01

-4
-3

0

-2
          

-0.01

-1

-0.02

0

-0.03

x(mm)

1

Fig.3 Profiles of magnetic flux density of the sample magnet.

― 163 ―

第83回

2010年度秋季低温工学・超電導学会

2B-a08核融合୧➃෭༷ᆺ⮬ບ᣺ືᘧ䝠䞊䝖䝟䜲䝥䛾పືస≉ᛶ㻌

Cryogenic characteristics of both ends cooling and central heating oscillating heat pipes㻌୕ᡞ฼⾜㻘㻌 ᰗ㛗㛛㻘㻌 ⏣ᮧோ㻌 㻔㻺㻵㻲㻿㻕㻧㻌 ኟ┠ᜤᖹ㻌 㻔⥲◊኱㻕㻧㻌 ⋢⏣ຮ㻘㻌 ᘧ⏫ᾈ஧㻘㻌 ᖹ㔝┤ᶞ䠈㛗ᒇ㔜ኵ㻌 㻔୰㒊㟁ຊ㻕㻌
MITO Toshiyuki, YANAGI Nagato, TAMURA Hitoshi (NIFS); NATSUME Kyohei㻌 (SOKENDAI䠅;TAMADA Tsutomu, SHIKIMACHI Koji, HIRANO Naoki, NAGAYA Shigeo (CEPCO)
e-mail: mito@ nifs.ac.jp㻌㻝䠊䛿䛨䜑䛻㻌㻻㻴㻼 䛾タ⨨᪉ྥ౫Ꮡᛶ䜢⧳䜑䛯䝕䞊䝍䜢 㼀㼍㼎㼘㼑㻌㻝 䛻♧䛩䚹㉸ఏᑟ䝬䜾䝛䝑䝖䛾᪂䛯䛺෭༷ᢏ⾡䛸䛧䛶䚸䝅䞊䝖≧䛾⮬௒ᅇ䛾ᐇ㦂᮲௳䛷䛿䚸Ỉᖹ䚸ୗഃຍ⇕䛷䛿Ᏻᐃ䛺⮬ບ᣺ືບ᣺ືᘧ䝠䞊䝖䝟䜲䝥䠄㻻㻴㻼㻕䜢⤌䜏㎸䜐䛣䛸䛻䜘䜚䚸䝬䜾䝛䝑䝖䛸䚸㻻㻴㻼 ≉᭷䛾㧗䛔⇕㍺㏦≉ᛶ䛜ほ 䛥䜜䛯䛜䚸ୖഃຍ⇕ෆ䛾Ⓨ⇕䜢ຠᯝⓗ䛻㝖ཤ䛷䛝䜛෭༷ᵓ㐀䜢㛤Ⓨ䛧䛶䛔䜛䚹᭱䛷䛿䚸ᆶ┤ཬ䜃ᩳ䜑䛾୧᪉ྥඹ䛻䚸Ᏻᐃ䛺⮬ບ᣺ື䛜ほึ䛻䚸㏻ᖖ䛾∦ഃ෭༷䞉∦ഃຍ⇕䛾 㻻㻴㻼 䛾タ⨨᪉ྥ䛻䜘䜛䛥䜜䛪䚸㻻㻴㻼 䛸䛧䛶䛿ືస䛧䛺䛛䛳䛯䚹㻌ືస≉ᛶ䛾┦㐪䛻䛴䛔䛶ᐇ㦂䜢⾜䛔䚸㻻㻴㻼 䛾タ⨨᪉ྥ䛻䜘䠏䠊୧➃෭༷䞉୰ኸຍ⇕ᆺ 㻻㻴㻼 䛾ప ືస≉ᛶ㻌䛳䛶䛿ప 䛷䛾Ᏻᐃ䛺ືస䛜䛷䛝䛺䛔䛣䛸䜢☜ㄆ䛧䛯䚹ḟ䛻௒ᚋ䛾 㻻㻴㻼 ᵓ㐀䛾᭱㐺໬➼䛻䜘䜚䚸タ⨨᪉ྥ䛻౫䜙䛺䛔䝬䜾䝛䝑䝖෭༷䛻ᚲ⏝䛺඲タ⨨᪉ྥ䛷䛾ືస䜢ྍ⬟䛸䛩䜛䛯ືస䛜ྍ⬟䛻䛺䜛䛣䛸䜒᝿ᐃ䛥䜜䜛䛜䚸䜘䜚☜ᐇ䛷䝬䜾䝛䝑䝖䜈䜑䚸ᵓ㐀䜢ᨵⰋ䛧䛯୧➃෭༷䞉୰ኸຍ⇕ᆺ䛾 㻻㻴㻼 䛻䛴䛔䛶䛾⤌䜏㎸䜏䛻㐺䛧䛯ᙧ≧䛸䛧䛶䚸୧➃෭༷䞉୰ኸຍ⇕䛾 㻻㻴㻼ືసᐇ㦂䜢⾜䛳䛯䚹䛣䜜䜙䛾⤖ᯝ䛻䛴䛔䛶ሗ࿌䛩䜛䚹㻌䜢⪃᱌䛧䚸ప 䛷䛾ືసᐇ㦂䜢⾜䛳䛯䚹୧➃෭༷䞉୰ኸຍ⇕䠎䠊∦ഃ෭༷䞉∦ഃຍ⇕ 㻻㻴㻼 䛾タ⨨ゅᗘ౫Ꮡᛶ㻌㻻㻴㻼 䛾ᵓ㐀䜢 㻲㼕㼓㻚㻌㻞 䛻♧䛩䚹እᚄ 㻟㼙㼙䚸ෆᚄ 㻞㼙㼙 䛾㖡⟶䜢㻤 ᅇᢡ䜚㏉䛧䛶୧➃䜢᥋⥆䛧䛯ᵓ㐀䛷䚸୰ኸ㒊䛻ຍ⇕㒊䚸୧㻲㼕㼓㻚㻌 㻝 䛻∦ഃ෭༷䞉∦ഃຍ⇕䛾 㻻㻴㻼 䛻䛴䛔䛶䚸ప 䛷䛾ഃ䛻෭༷➃䛸䛺䜛㖡䝤䝻䝑䜽䛜༙⏣௜䛡䛥䜜䛶䛔䜛䚹సᴗὶタ⨨᪉ྥ౫Ꮡᛶ䜢 ᐃ䛧䛯ᐇ㦂⿦⨨䛾ᵓᡂ䜢♧䛩䚹ᐇ㦂䛻య䛻䝛䜸䞁䜢⏝䛔䚸ᾮ඘ሸ⋡ 㻡㻜㻑䛸䛧䛯ሙྜ䛾䚸➼౯ⓗ䛺⇕⏝䛔䛯 㻻㻴㻼 䛿䚸㓄⟶እᚄ 㻟㻚㻝㻤㻌 㼙㼙䠄㻝㻛㻤 䜲䞁䝏䠅䚸ෆᚄ 㻝㻚㻡㻤㻌ఏᑟ⋡䛾 ᐃ⤖ᯝ䜢 㻲㼕㼓㻚㻌㻟 䛻♧䛩䚹㼀㼍㼎㼘㼑㻌㻝 䛻♧䛧䛯∦ഃ෭㼙㼙 䛾䝇䝔䞁䝺䝇⟶䜢䚸┤⥺㒊䛾㛗䛥 㻝㻢㻜㼙㼙 䛷 㻝㻜 ᅇᢡ䜚㏉䛧༷䛾ሙྜ䛻ẚ䜉䚸➼౯ⓗ䛺⇕ఏᑟ⋡䛿ᩘศ䛾䠍䛾್䛸䛺䛳䛶䛶୧➃䜢᥋⥆䛧䛯䝹䞊䝥ᵓ㐀䛷䚸┤⥺㒊䛾୧ഃ䛻䛿㛗䛥䛔䜛䛜䚸Ᏻᐃ䛺⮬ບ᣺ື䛿ほ 䛥䜜䛶䛚䜚䚸㻻㻴㻼 䛸䛧䛶ືస㻟㻜㼙㼙䚸ཌ䛥 㻝㻜㼙㼙 䛾㖡䝤䝻䝑䜽䛜༙⏣௜䛡䛥䜜䚸∦ഃ䛜෭༷䛩䜛䛣䛸䛜☜ㄆ䛥䜜䛯䚹ᮏ◊✲䛿䚸᰾⼥ྜ⛉Ꮫ◊✲ᡤ䚸᪂䜶➃䚸䜒䛖୍᪉䛜ຍ⇕➃䜢ᵓᡂ䛩䜛䚹タ⨨᪉ྥ䛿䚸Ỉᖹ䠄㼍㻌 㻩㻌 㻜q㻕䚸䝛 䝹 䜼 䞊 䞉 ⏘ ᴗ ᢏ ⾡ ⥲ ྜ 㛤 Ⓨ ᶵ ᵓ 䠄 㻺㻱㻰㻻㻕 䚸 ⛉ ◊ ㈝ୗഃຍ⇕ᆶ┤㻌 㻔㼍㻌 㻩㻌 㻗㻥㻜q㻕䚸㻌 ୗഃຍ⇕ᩳ䜑㻌 㻔㼍㻌 㻩㻌 㻗㻠㻡q㻕䚸ୖഃ㻔㻞㻝㻟㻢㻜㻠㻡㻢㻕䛾ຓᡂ䜢ཷ䛡䛯䜒䛾䛷䛒䜛䚹㻌ຍ⇕ᆶ┤㻌 㻔㼍㻌㻩㻌㻙㻥㻜q㻕㻘㻌 ୖഃຍ⇕ᩳ䜑㻌 㻔㼍㻌㻩㻌㻙㻠㻡q㻕䛾㻌 㻡 ᪉ྥ䚸సືὶయ䛿Ỉ⣲䚸䝛䜸䞁䛾 㻞 ✀㢮䛻䛴䛔䛶 ᐃ䜢⾜䛳䛯䚹㻌6Condenser

a = +45

P1
7 N2

Ne

9

H2

a = +90

11

P2

5

8
Evaporator
4

installation angle: a = 0
Evaporator

Condenser

Evaporator

3

a = -902

a = -45

㻌Condenser

Fig. 2. Both ends cooling and central heating OHP.
Effective thermal conductivity [W/m*K]

1

10

Fig. 1. Experimental setup of cryogenic OHP measuring theeffect of orientation, where 1)cryogenic OHP, 2)Cubus bar, 3)GM cryocooler, 4)filling pipes of working
fluid, 5)valve, 6)buffer tank, 7)pressure gauge, 8)gas
storage of working fluid (H2, Ne, N2), 9)vacuum pump,10)radiation shield, 11)cryostat.
Table 1. Summary of characteristics of OHP with orientation
Work- Orientationing
fluid [degree]

Liquidfilling ratio[%]

Heat flux[W/mm2]

Effective
thermalconductivity[W/m·K]

H2
H2
H2
H2
H2
Ne
Ne
Ne
Ne
Ne

50.9 – 70.0
50.0 – 70.4
51.1 – 72.2
53.2 – 75.0
50.6 – 70.1
69.8 – 86.1-

0.03 – 0.46
0.05 – 0.82
0.05 – 0.30
0.03 – 0.46
0.10 – 0.82
0.03 – 0.82-

8,500 – 11,480
2,220 – 10,330
2,830 – 6,380
Not operate
Not operate
5,100 – 19,440
6,000 – 17,000
6,000 – 8,500
Not operate
Not operate

+90
+45
0
-45
-90
+90
+45
0
-45
-90

2400
2000
1600
1200
800

Liquid filling ratio: 50%

400
0

0

0.05 0.1 0.15 0.2
Heat input [W/mm2]

0.25

Fig. 3. Effective thermal conductivity ofboth ends coolingand central heating OHP.
㻌
ཧ⪃ᩥ⊩㻌
[1]

[2]

― 164 ―

୕ᡞ฼⾜௚, 㺀㉸ఏᑟ࣐ࢢࢿࢵࢺ⤌㎸ᆺࢩ࣮ࢺ≧⮬ບ᣺ືᘧࣄ࣮ࢺࣃ࢖ࣉࡢ㛤Ⓨ㺁, 2010ᖺᗘ᫓Ꮨప ᕤᏛ࣭㉸ఏᑟᏛ఍ㅮ₇ᴫせ㞟,p. 51.
ኟ┠ᜤᖹ௚, 㺀⮬ບ᣺ືᘧࣄ࣮ࢺࣃ࢖ࣉ࡟࠾ࡅࡿప ືస≉ᛶࡢタ⨨᪉ྥ౫Ꮡᛶ㺁, 2010ᖺᗘ᫓Ꮨప ᕤᏛ࣭㉸ఏᑟᏛ఍ㅮ₇ᴫせ㞟, p.101.

第83回

2010年度秋季低温工学・超電導学会

2B-a09核融合ప ືస⮬ບ᣺ືᘧ䝠䞊䝖䝟䜲䝥䛾㛤Ⓨ㻌㻙㻌 ㉸ఏᑟ䝬䜾䝛䝑䝖䜈䛾ᛂ⏝ྍ⬟ᛶ䛾ㄪᰝ㻌 㻙㻌㻰㼑㼢㼑㼘㼛㼜㼙㼑㼚㼠㻌㼛㼒㻌㼏㼞㼥㼛㼓㼑㼚㼕㼏㻌㼛㼟㼏㼕㼘㼘㼍㼠㼕㼚㼓㻌㼔㼑㼍㼠㻌㼜㼕㼜㼑㼟㻌㻙㻌㻭㻌㼜㼞㼑㼘㼕㼙㼕㼚㼍㼞㼥㻌㼕㼚㼢㼑㼟㼠㼕㼓㼍㼠㼕㼛㼚㻌㼛㼒㻌㼒㼑㼍㼟㼕㼎㼕㼘㼕㼠㼥㻌㼍㼚㼐㻌㼑㼒㼒㼑㼏㼠㼕㼢㼑㼚㼑㼟㼟㻌㼒㼛㼞㻌㼟㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌㼙㼍㼓㼚㼑㼠㼟㻌㻙㻌㻌ኟ┠㻌 ᜤᖹ䠄⥲◊኱䠅㻧㻌 ୕ᡞ㻌 ฼⾜㻘㻌 ᰗ㻌 㛗㛛㻘㻌 ⏣ᮧ㻌 ோ䠄㻺㻵㻲㻿䠅㻧㻌 ⋢⏣㻌 ຮ㻘㻌 ᘧ⏫㻌 ᾈ஧㻘㻌 ᖹ㔝㻌 ┤ᶞ㻘㻌 㛗ᒇ㻌 㔜ኵ䠄୰㒊㟁ຊ䠅㻌㻺㻭㼀㻿㼁㻹㻱㻌㻷㼥㼛㼔㼑㼕㻌㻔㻿㻻㻷㻱㻺㻰㻭㻵㻕㻧㻌㻹㻵㼀㻻㻌㼀㼛㼟㼔㼕㼥㼡㼗㼕㻘㻌㼅㻭㻺㻭㻳㻵㻌㻺㼍㼓㼍㼠㼛㻘㻌㼀㻭㻹㼁㻾㻭㻌㻴㼕㼠㼛㼟㼔㼕㻌㻔㻺㻵㻲㻿㻕㻌㻧㻌㼀㻭㻹㻭㻰㻭㻌㼀㼟㼡㼠㼛㼙㼡㻘㻌㻿㻴㻵㻷㻵㻹㻭㻯㻴㻵㻌㻷㼛㼖㼕㻘㻌㻴㻵㻾㻭㻺㻻㻌㻺㼍㼛㼗㼕㻌㼍㼚㼐㻌㻺㻭㻳㻭㼅㻭㻌㻿㼔㼕㼓㼑㼛㻌㻔㻯㻱㻼㻯㻻㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼚㼍㼠㼟㼡㼙㼑㻬㼚㼕㼒㼟㻚㼍㼏㻚㼖㼜㻌㻌㻝䠊䛿䛨䜑䛻㻌
㻠䠊㉸ఏᑟ䝬䜾䝛䝑䝖䜈䛾ᛂ⏝㻌㉸ఏᑟ䝬䜾䝛䝑䝖䛾෭༷䝅䝇䝔䝮䛾㧗ᛶ⬟໬䛾䛯䜑䛻䚸᪂ᐇ㦂䛻䜘䛳䛶ᚓ䜙䜜䛯ືస≉ᛶ䜢䜒䛸䛻䚸㉸ఏᑟ䝬䜾䝛䛧䛔⇕㍺㏦䝕䝞䜲䝇䛸䛧䛶䚸⮬ບ᣺ືᘧ䝠䞊䝖䝟䜲䝥䝑䝖䜈䛾᭱㐺䛺ᛂ⏝᪉ἲ䜢᥈䛳䛯䚹㻲㼕㼓㻚㻌 㻞 䛻᝿ᐃ䛧䛶䛔䜛㻔㻻㼟㼏㼕㼘㼘㼍㼠㼕㼚㼓㻌㻴㼑㼍㼠㻌㻼㼕㼜㼑㻦㻌㻻㻴㻼㻕䛾౑⏝䛜ᥦ᱌䛥䜜䛯㼇㻝㼉䚹⌧ᅾ䜎㻻㻴㻼 ⤌䜏㎸䜏ᆺ䜽䞊䝸䞁䜾䝟䝛䝹䛾ᴫ␎ᅗ䜢♧䛩䚹㻻㻴㻼 䛾䛷䛻ప 䛷ືస䛩䜛⮬ບ᣺ືᘧ䝠䞊䝖䝟䜲䝥䜢」ᩘ✀㢮〇సὶ㊰䛿䜽䞊䝸䞁䜾䝟䝛䝹䛻⁁䜢ษ䛳䛶ᡂᙧ䛥䜜䚸䝁䜲䝹䛾ෆഃ䛧䚸䛭䛾ᇶ♏ືస≉ᛶ䜢ᐇ㦂䛻䜘䛳䛶ㄪ䜉䛶䛝䛯䚹䛭䛾⤖ᯝ䛸እഃ䛷෭༷䛩䜛䚹఍㆟䛷䛿䚸䝟䞁䜿䞊䜻䝁䜲䝹䜢 㻻㻴㻼 䜢⤌
䜢㋃䜎䛘䚸㛤Ⓨ䛧䛯ప ືస 㻻㻴㻼 䛾ᐇ㝿䛾㉸ఏᑟ䝬䜾䝛䝑䝖䜏㎸䜣䛰䜰䝹䝭䝙䜴䝮〇䛾䜽䞊䝸䞁䜾䝟䝛䝹䛷෭༷䛩䜛⣔䛻䜈䛾ᛂ⏝ྍ⬟ᛶ䜢ㄪᰝ䛧䛯䚹㻌䛴䛔䛶᳨ウ䛧䛯⤖ᯝ䜢ሗ࿌䛩䜛䚹㻌㻌㻌㻞䠊⮬ບ᣺ືᘧ䝠䞊䝖䝟䜲䝥㻌 㻔㻻㼟㼏㼕㼘㼘㼍㼠㼕㼚㼓㻌㻴㼑㼍㼠㻌㻼㼕㼜㼑㻦㻌㻻㻴㻼㻕㻌㻌㻻㻴㻼 䛿⣽䛔䝟䜲䝥䜢ఱ㔜䛻䜒ᢡ䜚᭤䛢䛯ᙧ≧䜢䛧䛶䛔䜛䚹䜎䛯ᚑ᮶䛾䝠䞊䝖䝟䜲䝥䛸䛿␗䛺䜚䚸ෆ㒊䛻ᾮయᚠ⎔䛾䛯䜑䛾䜴䜱䝑䜽ᵓ㐀䛿Ꮡᅾ䛧䛺䛔䚹㻲㼕㼓㻚㻌 㻝 䛿 㻻㻴㻼 䛾ᵓ㐀䛸ືసᴫᛕ䜢⾲䛧䛶䛔䜛䚹ᑒධ䛥䜜䛯ὶయ䛿䝟䜲䝥ෆ㒊䛻ẼἻ䛸ᾮᰕ䛜㛗ᡭ᪉ྥ䛻஺஫䛻ศᕸ䛧䚸ධ⇕㒊䛷ᾮᰕ䛜⵨Ⓨ䛧䚸෭༷㒊䛷ẼἻ䛿⵨Ⓨ䛩䜛䚹䛭䜜䛻క䛖ᅽຊኚ໬䛜᣺ືὶ䜢㥑ື䛧䚸₯⇕䛸㢧⇕䛾୧᪉䜢௨䛶⇕䛿㍺㏦䛥䜜䜛䚹㻌㻌㻟䠊⮬ບ᣺ືᘧ䝠䞊䝖䝟䜲䝥䛾ప ືస≉ᛶ㻌సືὶయ䛸䛧䛶Ỉ⣲䚸䝛䜸䞁䜢⏝䛔䛶ప ືస 㻻㻴㻼 䛾ືస≉ᛶ䛾 ᐃᐇ㦂䜢⾜䛳䛯㼇㻝㻙㻟㼉䚹䛭䛾⤖ᯝ䚸〇స䛧䛯 㻻㻴㻼䛾ᐇຠⓗ䛺 㻻㻴㻼 䛾⇕ఏᑟᗘ䛿䛭䜜䛮䜜䚸㻞㻘㻜㻜㻜㻙㻝㻝㻘㻡㻜㻜㻌㼃㻛㻔㼙䞉㻷㻕䚸㻡㻘㻜㻜㻜㻙㻝㻥㻘㻡㻜㻜㻌 㼃㻛㻔㼙䞉㻷㻕䛻㐩䛧䛯㻔㼏㼒㻚㻌 ṧ␃᢬ᢠẚ䛜 㻝㻜㻜㻌 䛾㖡䛾⇕ఏᑟᗘ䛿䚸 ᗘ 㻞㻜㻷䚸☢ሙ 㻝㼀㻌 䛾᮲௳ୗ䛷㻞㻘㻜㻜㻜㻌 㼇㼃㻛㼙㻖㻷㼉㻌 ⛬ᗘ㻕䚹䜎䛯䚸タ⨨᪉ྥ䛻䜘䜛ືస≉ᛶ䛾ኚ໬䜢㍍ῶ䛧䚸䜘䜚☜ᐇ䛷Ᏻᐃ䛺ືస䛾䛯䜑䛻୧➃෭༷䞉୰ኸຍ⇕䛾 㻻㻴㻼 䜢㛤Ⓨ䛧ᐇ㦂䜢⾜䛳䛶䛔䜛䚹㻌㻌㻌㻌
Figure 2 Supposed prototype model of cooling panel for
conduction/indirect cooling system for pancake coils㻌㻌
C ondenser㻌㻡䠊䛚䜟䜚䛻㻌
ᮏ◊✲䛿䚸᰾⼥ྜ⛉Ꮫ◊✲ᡤ䚸᪂䜶䝛䝹䜼䞊䞉⏘ᴗᢏ⾡⥲ྜ㛤Ⓨᶵᵓ㻔㻺㻱㻰㻻㻕䚸⛉◊㈝㻔㻞㻝㻟㻢㻜㻠㻡㻢㻕䛾ຓᡂ䜢ཷ䛡䛯䜒
L iq u id s lu g /䛾䛷䛒䜛䚹㻌
㻌V a p o u r b u b b leཧ⪃ᩥ⊩㻌o s c illa t io n㻝㻚㻌 㻌㼀㻚㻌 㻹㼕㼠㼛㻘㻌 㼑㼠㻌 㼍㼘㻘㻦㻌 㻰㼑㼢㼑㼘㼛㼜㼙㼑㼚㼠㻌 㼛㼒㻌 㻴㼕㼓㼔㼘㼥㻌 㻱㼒㼒㼑㼏㼠㼕㼢㼑㻌 㻯㼛㼛㼘㼕㼚㼓㻌㼀㼑㼏㼔㼚㼛㼘㼛㼓㼥㻌 㼒㼛㼞㻌 㼍㻌 㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌 㻹㼍㼓㼚㼑㼠㻌 㼁㼟㼕㼚㼓㻌㻯㼞㼥㼛㼓㼑㼚㼕㼏㻌 㻻㻴㻼㻘㻌 㻭㼜㼜㼘㼕㼑㼐㻌 㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼢㼕㼠㼥㻘㻌 㻵㻱㻱㻱㻌E v a p o ra to r㼀㼞㼍㼚㼟㼍㼏㼠㼕㼛㼚㼟㻌㼛㼚㻘㻌㼢㼛㼘㻚㻌㻞㻜㻘㻌㻞㻜㻝㻜㻘㻌㼜㼜㻚㻌㻞㻜㻞㻟㻙㻞㻜㻞㻢㻚㻌㻞㻚㻌 㻷㻚㻌 㻺㼍㼠㼟㼡㼙㼑㻘㻌 㼑㼠㻌 㼍㼘㻘㻦㻌 㻴㼑㼍㼠㻌 㼠㼞㼍㼚㼟㼒㼑㼞㻌 㼏㼔㼍㼞㼍㼏㼠㼑㼞㼕㼟㼠㼕㼏㼟㻌 㼛㼒㻌㻌㼏㼞㼥㼛㼓㼑㼚㼕㼏㻌 㼛㼟㼏㼕㼘㼘㼍㼠㼕㼚㼓㻌 㼔㼑㼍㼠㻌 㼜㼕㼜㼑㼟㻌 㼒㼛㼞㻌 㼔㼕㼓㼔㻌 㼠㼑㼙㼜㼑㼞㼍㼠㼡㼞㼑㻌㻌㼟㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌㼙㼍㼓㼚㼑㼠㼟㻘㻌㻯㼞㼥㼛㼓㼑㼚㼕㼏㼟㻌㻔㼠㼛㻌㼎㼑㻌㼜㼡㼎㼘㼕㼟㼔㼑㼐㻚㻕㻚㻌㻟㻚㻌㼀㻚㻌㻹㼕㼠㼛㻘㻌㼑㼠㻌㼍㼘㻚㻦㻌㻭㼎㼟㼠㼞㼍㼏㼠㼟㻌㼛㼒㻌㻯㻿㻶㻌㻯㼛㼚㼒㼑㼞㼑㼚㼏㼑㻘㻌㼂㼛㼘㻚㻌㻤㻟㻔㻞㻜㻝㻜㻕㻌
Figure 1 Concept of the heat transfer mechanism of㻞㻮㻙㼍㻜㻤㻚㻌
oscillating heat pipe (OHP)㻌㻌― 165 ―

第83回

2010年度秋季低温工学・超電導学会

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䝠䝇䝔䝸䝅䝇䛜኱䛝䛟䛺䜚䚸⮫⏺㟁ὶ䛺䛹䛜ྥୖ䛧䛶䛔䜛䛣䛸䛜
0DJQHWLFILHOG 7᥎ 䛥䜜䜛䚹[ QP  ↷ᑕ䛧䛯䜒䛾䛿䚸)LJ 䛻䛭䛾ᣑ
)LJ0+GLDJUDPVRILUUDGLDWHG1E6QVWUDQGV኱ᅗ䜢♧䛩䜘䛖䛻䚸䜋䜣䛾䜟䛪䛛㉸ఏᑟ≉ᛶ䜢♧䛩䚹)LJ 䛻♧䛩 [ QP  ↷ᑕ䛾⤖ᯝ䛿䚸඲䛟㉸ఏᑟ䜢♧䛥䛺䛔䚹
1RQLUUDGLDWHG ཯☢ᛶ䛜ぢ䜙䜜䜛䛾䛿 1E6Q ⥺ᮦ䜢ᵓᡂ䛩䜛 &X 䛾≉ᛶ䛷䛒䜚䚸7 ௜㏆䛻ぢ䜙䜜䜛཯☢ᛶ䛿 1E 䛾≉ᛶ䛸ᛮ䜟䜜䜛䚹[QP䛣䛾⤖ᯝ䛛䜙 7 ௜㏆䛾 %& 䛾᥎ᐃ䜢⾜䛖䛾䛿↓⌮䛜䛒䜛


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
䛜䚸[ QP ↷ᑕ䛸 [ QP ↷ᑕ䛸䛾㛫䛻䛿᫂䜙䛛䛺☢໬≉ᛶ䛾ኚ໬䛜䛒䜚䚸[ QP  ↷ᑕ䛻䜘䛳䛶%& 䜒ྥୖ䛧䛶䛔䜛ྍ⬟ᛶ䛜䛒䜛䚹)16 䛷䛾 0H9 ୰ᛶᏊ※䜢⏝䛔䛯↷ᑕᐇ㦂䛿௒ᚋ䜒⥅⥆䛥䜜䜛ணᐃ䛷䛒䜚䚸䜔䛜䛶䛿+\EULG0DJQHW 䛷䛾ᐇ 䛻䜘䛳䛶 %& 䛾ኚ໬䜢᫂䜙䛛䛻䛩䜛䛣 [QP䛸䛜䛷䛝䜛䜒䛾䛸ᮇᚅ䛥䜜䜛䚹
1E$O ⥺ᮦ䛾ᮍ↷ᑕᮦ䛸↷ᑕᮦ䛾⤖ᯝ䜢 )LJ 䛻♧䛩䚹ᮍ







0DJQHWLFILHOG 7↷ᑕᮦ䚸↷ᑕᮦ䛸䜒䛻኱䛝䛺 )OX[MXPS 䛜ㄆ䜑䜙䜜䚸䛣䜜䛿䝣
)LJ0+GLDJUDPVRIQRQ LUUDGLDWHG1E$OVWUDQGV䜱䝷䝯䞁䝖ᚄ䛜ኴ䛔䛣䛸䛻㉳ᅉ䛧䛶䛔䜛䚹䜎䛯䚸䝣䜱䝷䝯䞁䝖ᚄ䛜኱䛝䛔䛯䜑䛻☢໬䛾್䛭䛾䜒䛾䛜 )LJ 䛻ẚ䜉䛶⣙  ಸ኱䛝
1RQLUUDGLDWHG 䛟䛺䛳䛶䛔䜛䚹1E$O ⥺ᮦ䛷䛿䚸[QP ↷ᑕ䛷䜒ᮍ↷ᑕᮦ䛸䜋䛸䜣䛹ྠ䛨☢໬≉ᛶ䜢♧䛧䚸[ QP ↷ᑕ䛷䛿䡚7 ௜㏆䛷☢໬≉ᛶ䛜ྥୖ䛩䜛䚹䛣䛾䛣䛸䛛䜙䚸1E6Q ⣲⥺䛸ྠᵝ䚸㧗☢ሙ䛷䛾⮫⏺㟁ὶ䛾ྥୖ䛜ᮇᚅ䛥䜜䜛䚹[QP ↷ᑕ䛷䛿඲䛟☢໬䛜ㄆ䜑䜙䜜䛺䛟䛺䜚䚸㉸ఏᑟ䛷䛺䛟䛺䛳䛶䛔䜛䚹䛣䛾↷ᑕヨᩱ䜢䚸䉝䛷  ᫬㛫䛾↝䛝䛺䜎䛧䜢⾜䛔䚸㉸ఏᑟ≉ᛶ䛾ᅇ᚟≧ἣ䜢᳨ウ䛧䛯䚹䛭䛾⤖ᯝ䜢 )LJ䛻♧䛩䚹⇕ฎ⌮ᚋ䚸෌䜃 )OX[MXPS 䜢♧䛩䜘䛖䛻䛺䜚䚸ᮍ↷ᑕ[QP $QQHDOLQJ䛾䜒䛾䛻ẚ䜉ᑡ䛧☢໬䛿ᑠ䛥䛔䜒䛾䛾䚸7 䛾⠊ᅖ䛷䚸䜋䜌㉸ఏᑟ≉ᛶ䛜ᅇ᚟䛧䛶䛔䜛䛣䛸䛜ศ䛛䜛䚹







௨ୖ䛾䛣䛸䛛䜙䚸㧗㏿୰ᛶᏊ䛾ᙎ䛝ฟ䛧ຠᯝ䚸୙つ๎ᛶ䛜
0DJQHWLFILHOG 7㉸ఏᑟ≉ᛶ䛻኱䛝䛟ᙳ㡪䜢ཬ䜌䛧䛶䛔䜛䛣䛸䛜ศ䛛䜛䚹
)LJ0+GLDJUDPVRI1E$OVWUDQGVDQQHDOHGDIWHULUUDG
/RQJPRPHQW HPXJ/RQJPRPHQW HPXJ/RQJPRPHQW HPXJ/RQJPRPHQW HPXJ― 166 ―

第83回

2010年度秋季低温工学・超電導学会

2B-a11核融合䝦䝸䜹䝹ᆺ᰾⼥ྜ䜶䝛䝹䜼䞊⅔㻲㻲㻴㻾䛾㻌㧗 ㉸ఏᑟ䝬䜾䝛䝑䝖タィ䜸䝥䝅䝵䞁䛾㐍ᒎ㻌Progress of High-Temperature Superconducting Magnet Option
for the Helical-Type Fusion Energy Reactor FFHRᰗ㻌 㛗㛛䠈୕ᡞ฼⾜䠈⏣ᮧ㻌 ோ䠈ᚋ⸨ᣅஓ䠈௒ᕝಙస䠈┦Ⰻ᫂⏨㻌 㻔NIFS㻕䠗㻌 ኟ┠ᜤᖹ㻌 㻔⥲◊኱㻕㻌YANAGI Nagato, GOTO Takuya, TAMURA Hitoshi, MITO Toshiyuki, IMAGAWA Shinsaku, SAGARA Akio㻌㻔NIFS㻕;NATSUME Kyohei (Sokendai)
E-mail: yanagi@LHD.nifs.ac.jp䠍䠊 ◊✲䛾⫼ᬒ㻌኱ᆺ䝦䝸䜹䝹⿦⨨㻔㻸㻴㻰㻕䛻䛚䛡䜛ඃ䜜䛯䝥䝷䝈䝬㛢䛨䛣䜑ᐇ㦂䛾㐍ᒎ䜢ཷ䛡䛶䚸䝦䝸䜹䝹ᆺ᰾⼥ྜ䜶䝛䝹䜼䞊⅔ FFHR
䛾タィ䛜㗦ព㐍䜑䜙䜜䛶䛔䜛[1]ࠋ䛣䛾⿦⨨䛾ᕧ኱䛺㉸ఏᑟ䝦䝸䜹䝹䝁䜲䝹䛻䛿䚸⤒㦂☢ሙ 13 T ௨ୖ䛻䛚䛔䛶㟁ὶ್ 100
kA ⣭䛾ᑟయ䛜せồ䛥䜜䜛䚹⌧ᅾ䛾タィ䛷䛿䚸Nb3Al ⥺ᮦ䜢⏝䛔䛯䜿䞊䝤䝹䜲䞁䝁䞁䝆䝑䝖ᑟయ䜢ᇶᮏ䜸䝥䝅䝵䞁䛸䛧䚸ITER
䛷㛤Ⓨ䛥䜜䛶䛝䛯ᢏ⾡䛾ᘏ㛗䛸䛧䛶᳨ウ䜢㐍䜑䛶䛔䜛[2]䚹୍᪉䚸ඛ㐍䜸䝥䝅䝵䞁䛸䛧䛶䚸Y ⣔㧗 ㉸ఏᑟ䠄HTS䠅⥺ᮦ䜢㞟ྜ䛧䛶኱ᆺᑟయ䜢ᵓᡂ䛧䚸㛫᥋෭༷䜢㐺⏝䛩䜛ྍ⬟ᛶ䛻䛴䛔䛶䜒᳨ウ䛧䛶䛔䜛[3,4]䚹HTS ᑟయ䜢⏝䛔䜛䛸 20 K ௨ୖ䛾㧗 㐠㌿䛜ྍ⬟䛸䛺䜛䛯䜑䚸䝁䜲䝹䛾Ᏻᐃᛶ䛻ඃ䜜䜛䛸䛸䜒䛻䚸෭༷䝟䝽䞊䛾㍍ῶ䛜ᮇᚅ䛥䜜䜛䚹ᑟయ䛿 Y ⣔䝔䞊䝥⥺ᮦ䜢༢⣧✚ᒙ䛧䛶䝇䝔䞁䝺䝇〇䝆䝱䜿䝑䝖䛻཰䜑䜛ᵓ㐀䜢᝿ᐃ䛧䛶䛔䜛䛜䚸ᚲせ䛻ᛂ䛨䛶⥺ᮦ㛫䛾㌿఩ᵓ㐀䜒ᑟධ䛩䜛䚹䛣䜜䜎䛷䛻 10
kA ⣭▷ᑻᑟయ䝃䞁䝥䝹䛾ヨ㦂䜢⾜䛳䛶䛚䜚䚸100 kA ⣭ᑟయ䜢㛤Ⓨ䛷䛝䜛ぢ㏻䛧䜢ᚓ䛶䛔䜛䚹䛷䛒䜜䜀☜ᐇ䛻᥋⥆䜢⾜䛖䛣䛸䛜䛷䛝䚸㍺㏦䛻㛵䛧䛶䜒ၥ㢟䛻䛺䜙䛺䛔䚹䛣䛣䛷䚸ᑟయ᥋⥆㒊䛻䛿䚸ᅗ䠎䛻♧䛩䜘䛖䛺㝵ẁ≧䛾ᵓ㐀䜢⪃䛘䜛䚹䛣䜜䛿䚸ྠ䛨 Y ⣔⥺ᮦ䜢⏝䛔䛯᥋⥆䝢䞊䝇䜢⏝ព䛧䚸㉸ఏᑟ㠃ྠኈ䜢༙⏣᥋⥆䛩䜛䛣䛸䛷ప᢬ᢠ᥋⥆䜢ᐇ⌧䛩䜛䜒䛾䛷䛒䜛䚹௒䚸ྛ⥺ᮦ㛫䛷 50 mm 䛾᥋⥆㛗䜢⪃䛘䜛䛸䚸ᑟయ඲య䛸䛧䛶䛿 0.3 n䃈⛬ᗘ䛾᥋⥆᢬ᢠ䛻䛺䜛䛸ண᝿䛥䜜䜛䚹䜘䛳䛶䚸ᑟయ㟁ὶ 100 kA 䛷 8000 ⟠ᡤ䛾᥋⥆䛜䛒䜛ሙྜ䚸඲య䛷䛿 24 kW 䛾Ⓨ⇕䛸䛺䜛䛜䚸20 K ෭༷䛾ሙྜ䚸䛣䛾ศ䛻ᚲせ䛺እ㒊㟁ຊ䛿 1.5 MW ⛬ᗘ䛷῭䜐䚹୍᪉䚸᥋⥆㒊䛷䛿䝇䝔䞁䝺䝇䛾䝆䝱䜿䝑䝖㛫䜢⁐᥋䛩䜛䛣䛸䛷༑ศ䛺ᘬ䛳ᙇ䜚ᙉᗘ䜢☜ಖ䛩䜛䛣䛸䜒㔜せ䛷䛒䜛䚹䜎䛯䚸ྛᑟయ䛿༙䝢䝑䝏㛗䛸䛧䛶⢭ᗘⰋ䛟䠏ḟඖ᭤䛢䜢⾜䛳䛶䝁䜲䝹ᐜჾෆ䛻ᤣ䛘௜䛡䛶䛔䛟䛜䚸䠍ᮏ䛪䛴஦๓䛻ᾮయ❅⣲୰䛷ヨ㦂䜢⾜䛖䛣䛸䜒᝿ᐃ䛷䛝䚸䛣䜜䜒ရ㉁⟶⌮䛾䛖䛘䛷኱䛝䛺䝯䝸䝑䝖䛸䛺䜛䚹䠎䠊 䝉䜾䝯䞁䝖᪉ᘧ䛾䝦䝸䜹䝹䝁䜲䝹⤌䜏❧䛶᪉ἲ㻌
HTS 䜸䝥䝅䝵䞁䜢᥇⏝䛩䜛ሙྜ䚸ᅗ䠍(a)䛻♧䛩䜘䛖䛻䚸㐃⥆䛧䛯䝦䝸䜹䝹䝁䜲䝹䜢༙䝢䝑䝏䛤䛸䛻ศ๭䛧䛶〇స䛩䜛᪉ἲ䜒⪃䛘䜙䜜䜛[3,4]䚹䛣䛾ሙྜ䚸ᑟయ㛫䛾᥋⥆⟠ᡤ䛜 8000 ⛬ᗘ䛻ཬ䜆䛜䚸HTS ᑟయ䜢⏝䛔䜛䛣䛸䛷ᒁᡤⓗ䛺 ᗘୖ᪼䛸඲య䛾෭༷䝟䝽䞊䛻వ⿱䛜䛷䛝䜛䛯䜑䚸䛣䛖䛧䛯ᵓ㐀䜢ྲྀ䜛䛣䛸䛜ཎ⌮ⓗ䛻䛿ྍ⬟䛷䛒䜛䚹≉䛻䚸䛣䛾〇స᪉ᘧ䜢᥇⏝䛩䜛䛣䛸䛻䜘䛳䛶䚸௨ୗ䛾䜘䛖䛺䝯䝸䝑䝖䛜ᮇᚅ䛥䜜䜛䚹

Fig. 1 Segmented fabrication of helical coils with (a) half-pitch
coil segments and (b) half-pitch conductor segments.

䞉 」㞧䛺⅔ෆᵓ㐀≀䠄ቑṪ䝤䝷䞁䜿䝑䝖䜔䝎䜲䝞䞊䝍䠅䜢ඛ䛻ᤣ䛘௜䛡䛯ᚋ䛻䚸䝦䝸䜹䝹䝁䜲䝹䜢〇స䛷䛝䜛䚹䞉 㐃 ⥆ ᕳ 䛝 ⥺ ᪉ ᘧ 䛻 ᚲ せ ୙ ྍ Ḟ 䛸 䛺 䜛 ᕧ ኱ 䛺 ᕳ ⥺ ᶵ
䠄FFHR 䛷䛿እᚄ 40 m䠅䜢᭱ึ䛻〇స䛩䜛ᚲせ䛜䛺䛔䚹䞉 ᕳ⥺ᵓ㐀䛸䛧䛶➃ᮎฎ⌮䛻ඃ䜜䛯䝎䝤䝹䝟䞁䜿䞊䜻ᵓ㐀䜢᥇⏝䛩䜛䛣䛸䜒ྍ⬟䛸䛺䜛䚹䞉 䛣䛾〇స᪉ᘧ䛾Ⓨᒎᙧ䛸䛧䛶䚸䝉䜾䝯䞁䝖䜢ᶵᲔ᥋ྜ䛩䜛䛣䛸䛷⬺╔ྍ⬟䛸䛩䜛䜸䝥䝅䝵䞁䜒⪃䛘䜙䜜䜛[5]䚹䞉 㐃⥆ᕳ⥺䛸ẚ䜉䛶ᕤᮇ䛾▷⦰䛜ᮇᚅ䛷䛝䜛䚹୍᪉䚸ᢏ⾡ⓗㄢ㢟䜢⪃䛘䜛䛸䚸䜎䛪䚸䝁䜲䝹䝟䝑䜽䛾୰䛻⣡䜑䜙䜜䛯ᩘⓒᮏ䝺䝧䝹䛾ᑟయྠኈ䜢䛔䛛䛻䛧䛶᥋⥆䛩䜛䛾䛛䚸⌧ᐇ䛻䛿ᴟ䜑䛶㞴䛧䛔ၥ㢟䛷䛒䜛䚹䜎䛯䚸ၟᴗ⅔䛾タィ䛷䛿䚸䝦䝸䜹䝹䝁䜲䝹䛾༙䝢䝑䝏ศ䛾㔜㔞䛿ᩘⓒ䝖䞁䛻ཬ䜆䛣䛸䛻䛺䜚䚸㍺㏦䛜㞴䛧䛔䚹䜘䛳䛶䚸䛣䛾᪉ᘧ䛿㨩ຊⓗ䛷䛒䜛䜒䛾䛾䚸⌧ᐇⓗ䛺ᕤᏛタィ䜢⾜䛖䛣䛸䛿┦ᙜ䛻ᅔ㞴䛷䛒䜛䛸ㄆ㆑䛥䜜䛯䚹䠏䠊 ᑟయ䝉䜾䝯䞁䝖᪉ᘧ䛾ᕳ⥺᪉ἲ㻌䛭䛣䛷䚸௒ᅇ䚸䛣䛾䝉䜾䝯䞁䝖᪉ᘧ䛾〇స䛻㛵䛩䜛Ⓨ᝿⮬య䛿㋃く䛧䛴䛴䚸䛣䜜䜎䛷䛸䛿ᑡ䛧␗䛺䜛᪉ἲ䜢⪃䛘䜛䛣䛸䛷䚸䜘䜚⌧ᐇⓗ䛺ᕤᏛタィ䛜ྍ⬟䛸䛺䜛䛣䛸䜢ぢ䛔䛰䛧䛯䚹䛣䜜䛿䚸䝦䝸䜹䝹䝁䜲䝹඲య䜢䝉䜾䝯䞁䝖໬䛩䜛䛾䛷䛿䛺䛟䚸ᅗ䠍(b)䛻♧䛩䜘䛖䛻䚸ᑟయ䠍ᮏ䠍ᮏ䜢༙䝢䝑䝏䛪䛴䛾䝉䜾䝯䞁䝖䛸䛧䛶ಶู䛻䝁䜲䝹ᐜჾ䛾୰䛻཰䜑䚸㡰ḟ᥋⥆䛧䛶䛔䛟᪉ἲ䛷䛒䜛䚹䛣䜜

Fig. 2 Illustration for the jointing method of HTS conductors.
䛺䛚䚸㧗 ㉸ఏᑟ䜸䝥䝅䝵䞁䛾 R&D 䛸䛧䛶䚸௒ᅇ䚸Bi-2223⥺ᮦ䜢⏝䛔䛶┤ᚄ 400 mm䚸䝖䝻䜲䝎䝹☢ሙ 0.01 T ⛬ᗘ䛾䝦䝸䜹䝹䝁䜲䝹䠄᰾⼥ྜ◊✲⏝䛸䛧䛶䛿ୡ⏺ึ䠅䜢〇స䛧䚸ᐇ㦂䜒⾜䛳䛯䛾䛷䚸ㅮ₇䛷䛿䛭䜜䛻䛴䛔䛶䜒⤂௓䛩䜛䚹㻌ཧ⪃ᩥ⊩㻌[1] A. Sagara et al., Fusion Eng. Des. 81 (2006) 2703.
[2] S. Imagawa et al., Plasma and Fusion Res. 3 (2008) S1050.
[3] G. Bansal et al., Plasma and Fusion Res. 3 (2008) S1049.
[4] N. Yanagi et al., Plasma and Fusion Res. 5 (2010) S1026.
[5] H. Hashizume et al., J. Plasma Fusion Res. 5 (2001) 532.

― 167 ―

第83回

2010年度秋季低温工学・超電導学会

2B-a12核融合㻸㻴㻰 䝫䝻䜲䝎䝹䝁䜲䝹䛾ᒚṔᦆኻ㻌
Hysteresis loss in poloidal coils of the Large Helical Device (LHD)㻌
㻌㧗⏿㻌 ୍ஓ䠈ຊ▼ᾈᏕ䠈୕ᡞ฼⾜䠈௒ᕝಙస㻌 䠄㻺㻵㻲㻿䠅㻌㼀㻭㻷㻭㻴㻭㼀㻭㻌㻷㼍㼦㼡㼥㼍㻘㻌㻯㻴㻵㻷㻭㻾㻭㻵㻿㻴㻵㻌㻴㼕㼞㼛㼠㼍㼗㼍㻘㻌㻹㻵㼀㻻㻌㼀㼛㼟㼔㼕㼥㼡㼗㼕㻘㻌㻵㻹㻭㻳㻭㼃㻭㻌㻿㼔㼕㼚㼟㼍㼗㼡㻌㻔㻺㻵㻲㻿㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼠㼍㼗㼍㼔㼍㼠㼍㻬㻸㻴㻰㻚㼚㼕㼒㼟㻚㼍㼏㻚㼖㼜㻌㻌㻝䠊䛿䛨䜑䛻㻌
ྜ䛾Ⓨ⇕※䛿⣲⥺㛫䛾᥋ゐ᢬ᢠ䛷䛒䜛䛯䜑䠈ཝᐦ䛻䛿䝠䝇䝔኱ᆺ䝦䝸䜹䝹⿦⨨䠄㻸㻴㻰䠅䛾㉸ఏᑟ䝫䝻䜲䝎䝹䝁䜲䝹䛿䠈㻌䝸䝅䝇ᦆኻ䛻䛿ศ㢮䛥䜜䛺䛔䚹㻌㻺㼎㼀㼕 䜿䞊䝤䝹䞉䜲䞁䞉䝁䞁䝆䝑䝖ᑟయ䜢౑⏝䛧䛯኱ᆺ㉸ఏᑟ䝁஧䛴┠䛾ྍ⬟ᛶ䛿䠈ḟ䛾䛸䛚䜚䛷䛒䜛䚹䝎䝤䝹䝟䞁䜿䞊䜻䜲䝹䛷䛒䜛䚹䝦䝸䜹䝹ᆺ䝥䝷䝈䝬㛢䛨㎸䜑⿦⨨䛷䛒䜛 㻸㻴㻰 䛿䠈䠄䝁䜲䝹 㻞 ᒙศ䠅䛾୧➃䛻䛿㉸ఏᑟ᥋⥆㒊䛜䛒䜛䛯䜑䠈㠀ᖖ䛻ᐃᖖ㐠㌿䜢ᇶᮏ䛸䛧䠈䛣䜜䜎䛷☢ሙ䜢ᛴ㏿䛻ኚ໬䛥䛫䜛䛣䛸䛿㛗䛔㉸ఏᑟ䝹䞊䝥䛜ᙧᡂ䛥䜜䛶䛔䜛䚹୙つ๎䛺᧍䜚䜔☢ሙศ䛺䛛䛳䛯䚹䛧䛛䛧 㻞㻜㻜㻤 ᖺᗘ䛛䜙䛿䠈䝥䝷䝈䝬䛾఩⨨䜢ᐇ᫬㛫ᕸ䛻䜘䛳䛶㐽ⶸ㟁ὶ䛜ㄏ㉳䛥䜜䠈᧍⥺඲య䛷䝞䝹䜽ⓗ䛺᣺䜛䠄ᩘ⛊㛫䛾䜸䞊䝎䞊䠅䛷ไᚚ䛧䠈䝥䝷䝈䝬㛢䛨㎸䜑ᛶ⬟䜢ྥୖ⯙䛔䜢䛧䠈䝠䝇䝔䝸䝅䝇ᦆኻ䜢Ⓨ⏕䛩䜛ྍ⬟ᛶ䛜䛒䜛䚹㻌䛥䛫䜛ᐇ㦂䛜㛤ጞ䛥䜜䛯䚹䛭䛾䛯䜑䛻⏝ព䛥䜜䛯䛾䛜䠈㻞 ✀㢮䜎䛰ཎᅉ䜢ྠᐃ䛩䜛䛻䛿⮳䛳䛶䛔䛺䛔䛜䠈䜿䞊䝤䝹䞉䜲䞁䞉䛾䝫䝻䜲䝎䝹䝁䜲䝹䠄㻵㼂 䝁䜲䝹䛚䜘䜃 㻵㻿 䝁䜲䝹䠅⏝䛾䝟䝹䝇㟁䝁䞁䝆䝑䝖ᑟయ䜢⏝䛔䛯኱ᆺ䝁䜲䝹䛾䝠䝇䝔䝸䝅䝇ᦆኻ䛜䠈ィ⟬※䛷䛒䜛䚹ᚑ᮶䛾 㻢 ಸ䛾㟁ᅽ䛷䛒䜛 㻞㻝㻟䠲䜢Ⓨ⏕䛩䜛䛣䛸䛜䛷䛻䜘䜛ண 䜘䜚኱䛝䛟䛺䜛ྍ⬟ᛶ䛜♧၀䛥䜜䛯䚹㻌䛝䠈㻝㻚㻡 ⛊㛫䛻䝥䝷䝈䝬䛾఩⨨䜢 㻝㻜㻌 㼏㼙 ⛣ື䛥䛫䜛䛣䛸䛜ྍ⬟㻌䛸䛺䛳䛯䚹୍᪉䛷䠈䛣䛾䝟䝹䝇㟁※䜢ά⏝䛧䠈䝫䝻䜲䝎䝹䝁䜲䝹䛾஺ὶᦆኻ䜢 ᐃ䛷䛝䜛䜘䛖䛻䛺䛳䛯䚹๓ᅇ䛾Ⓨ⾲㼇㻝㼉䛷䛿⤖ྜᦆኻ䛻䛴䛔䛶ሗ࿌䛧䛯䛜䠈௒ᅇ䛿䝠䝇䝔䝸䝅䝇ᦆኻ䛾᭱኱㟁ὶ౫Ꮡᛶ䛻䛴䛔䛶᳨ウ䜢⾜䛳䛯䚹㻌㻌㻞䠊஺ὶᦆኻ䛾 ᐃ᪉ἲ䛸 ᐃ⤖ᯝ㻌䝁䜲䝹ෆ䛷Ⓨ⏕䛩䜛஺ὶᦆኻ䛿䠈෭፹䛾 ᗘୖ᪼䜢ほ䛩䜛⇕ⓗ䛺᪉ἲ䛷 ᐃ䛧䛯䚹⇕㈇Ⲵ䛸ྠ䛨䛟ධཱྀ䞉ฟཱྀ෭፹䛾䜶䞁䝍䝹䝢䞊ᕪ 'H 䛸ὶ㔞 m 䛾✚䛷ほ 䛩䜛䚹䝟䝹䝇㏻
㟁ᚋ䛾 m'H 䛾᫬㛫ኚ໬䛾✚ศ䛜䠈䛭䛾㏻㟁 㻝 䝃䜲䜽䝹䛻ᑐ䛩䜛ᦆኻ䛸䛧䛶 ᐃ䛥䜜䜛䚹௒ᅇ䛿 㻝 ᑐ䛾 㻵㼂 䝁䜲䝹䠄ୖഃ㻵㼂㻙㼁䠈ୗഃ 㻵㼂㻙㻸䠅䜢༢⊂䛷㏻㟁䛧䛯䚹㏻㟁Ἴᙧ䛿䝣䝷䝑䝖䝖䝑䝥䛜 㻝㻜 ⛊䠈❧䛱ୖ䛢㻛❧䛱ୗ䛢᫬㛫 W 0 䛾༢Ⓨ䛾ྎᙧἼ䛷䛒䜛䚹㻌ᅗ 㻝 䛿䠈᭱኱㏻㟁㟁ὶ䛜 㻞㻌㼗㻭䠈㻠㻌㼗㻭䠈㻡㻌㼗㻭 䛾䠈㏻㟁 㻝 䝃䜲䜽䝹ᙜ䛯䜚䛾஺ὶᦆኻ䛾 1 / W 0 ౫Ꮡᛶ䛷䛒䜛䚹ᦆኻ䛾 1 / W 0౫Ꮡᛶ䛿ྛ᭱኱㏻㟁㟁ὶ䛻䛴䛔䛶┤⥺㏆ఝ䛜ྍ⬟䛷䛒䜚㻲㼕㼓㻚㻝㻌㻹㼑㼍㼟㼡㼞㼑㼐㻌㻭㻯㻌㼘㼛㼟㼟㻌㼜㼑㼞㻌㼜㼡㼘㼟㼑㻌㼛㼜㼑㼞㼍㼠㼕㼛㼚㻌㼏㼥㼏㼘㼑㻌䠄ᐇ⥺䛜 㻵㼂㻙㻸䠈◚⥺䛜 㻵㼂㻙㼁䠅䠈 1 / W 0 䛜䝊䝻䛾ᴟ㝈䜢䝠䝇䝔䝸㻌䝅䝇ᦆኻ䛸䛧䛶ぢ✚䜒䜛䛣䛸䛜䛷䛝䜛䚹 ᐃ䛧䛯ᦆኻ䛛䜙䝠䝇䝔䝸䝅䝇ᦆኻ䜢ᕪ䛧ᘬ䛔䛯ᦆኻ䛜⤖ྜᦆኻ䛻┦ᙜ䛩䜛䚹㻌㻌㻟䠊䝠䝇䝔䝸䝅䝇ᦆኻ䛾ホ౯㻌ᅗ 㻝 䛾┤⥺㏆ఝ䛛䜙䛾እᤄ䛻䜘䛳䛶ồ䜑䜙䜜䛯䝠䝇䝔䝸䝅䝇ᦆኻ䜢ᅗ 㻞 䛻䝥䝻䝑䝖䛧䛯䚹䜎䛯䕿༳䛿䠈▷ᑻヨᩱ䛾☢໬᭤⥺䜢ᇶ䛻ィ⟬䛷ồ䜑䛯䝠䝇䝔䝸䝅䝇ᦆኻ䛷䛒䜛䚹ィ⟬䛷䛿䠈䝁䜲䝹ෆ㒊䛾☢ሙศᕸ䜢⪃៖䛧䛯䚹ᅗ 㻝 䛛䜙ศ䛛䜛䜘䛖䛻䠈 ᐃ⤖ᯝ䛸ィ⟬⤖ᯝ䛻᫂䜙䛛䛺ᕪ䛜ぢ䜙䜜䛯䚹᭱኱㟁ὶ䛜 㻡㻌 㼗㻭䛻䛚䛔䛶䛿䠈 ᐃ⤖ᯝ䛜ィ⟬⤖ᯝ䛾 㻝㻚㻠ࠥ㻝㻚㻤 ಸ኱䛝䛺್䛸䛺䛳䛯䚹㻌m'H 䛾᫬㛫ኚ໬䛛䜙䠈෭፹䛾ฟཱྀ䛛䜙ධཱྀ䜎䛷䛾䛚䛚
䜘䛭䛾Ⓨ⇕ศᕸ䜢▱䜛䛣䛸䛜䛷䛝䜛䚹䝎䝤䝹䝟䞁䜿䞊䜻㛫䛾᥋⥆䛻౑⏝䛧䛶䛔䜛᥋⥆㒊䛿䠈䛩䜉䛶ฟཱྀ௜㏆䛻Ꮡᅾ䛧䛶䛔䜛䛯䜑䠈᥋⥆㒊䛾䝆䝳䞊䝹ᦆኻ䛻䜘䜛Ⓨ⇕䛷䛒䜜䜀䠈㏻㟁┤ᚋ
䛾 m'H 䛜␗ᖖ䛻ቑຍ䛩䜛䛿䛪䛷䛒䜛䚹䛧䛛䛧䠈䛭䛾䜘䛖䛺⌧㇟䛿ぢ䜙䜜䛺䛛䛳䛯䚹ᚑ䛳䛶䠈䝠䝇䝔䝸䝅䝇ᦆኻ䛾ቑຍ䛿䠈䝁䜲䝹඲య䛷Ⓨ⏕䛧䛶䛔䜛䛸⪃䛘䜙䜜䜛䚹㻌䝠䝇䝔䝸䝅䝇ᦆኻ䛾ቑຍ䛻䛴䛔䛶䛿䠈ḟ䛾䠎䛴䛾せᅉ䛜⪃䛘䜙䜜䜛䚹୍䛴┠䛿䠈᧍䜚஘䜜䛻㉳ᅉ䛩䜛㛗᫬ᐃᩘ⤖ྜᦆኻ㼇㻞㼉䛾㔜␚䛷䛒䜛䚹ලయⓗ䛻䛿 㻝㻜 ⛊䛛䜙䠍䠌䠌⛊䜸䞊䝎䞊䜎䛷䛾ศᕸ䛧䛯᫬ᐃᩘ䜢ᣢ䛴⤖ྜᦆኻ䛜Ⓨ⏕䛩䜛䛸䠈 ᐃ䛧䛯
1 / W 0 䛾㡿ᇦ䛻䛚䛔䛶䜋䜌୍ᐃ䛾ᦆኻ䛜㔜␚䛥䜜䜛䚹䛭䛧䛶䛒䛯䛛䜒䝠䝇䝔䝸䝅䝇ᦆኻ䛾䜘䛖䛻ぢ䛘䜛ྍ⬟ᛶ䛜䛒䜛䚹䛣䛾ሙ㻲㼕㼓㻚㻌㻞㻌㻴㼥㼟㼠㼑㼞㼑㼟㼕㼟㻌㼘㼛㼟㼟㻌㼍㼟㻌㼍㻌㼒㼡㼚㼏㼠㼕㼛㼚㻌㼛㼒㻌㼠㼔㼑㻌㼙㼍㼤㼕㼙㼡㼙㻌㼏㼡㼞㼞㼑㼚㼠㻌ཧ⪃ᩥ⊩㻌㼇㻝㼉㻌㻷㻚㻌㼀㼍㼗㼍㼔㼍㼠㼍㻘㻌㼑㼠㻌㼍㼘㻚㻦㻌㻭㼎㼟㼠㼞㼍㼏㼠㼟㻌㼛㼒㻌㻯㻿㻶㻌㻯㼛㼚㼒㼑㼞㼑㼚㼏㼑㻘㻌㼂㼛㼘㻚㻌㻤㻝㻌㻔㻞㻜㻜㻥㻕㻌㼜㻚㻠㻠㻌㼇㻞㼉㻌 㼀㻚㻌 㼅㼍㼓㼍㼕㻘㻌 㼑㼠㻌 㼍㼘㻚㻦㻌 㻭㼎㼟㼠㼞㼍㼏㼠㼟㻌 㼛㼒㻌 㻯㻿㻶㻌 㻯㼛㼚㼒㼑㼞㼑㼚㼏㼑㻘㻌 㼂㼛㼘㻚㻌 㻣㻤㻌㻔㻞㻜㻜㻤㻕㻌㼜㻚㻝㻥㻡㻌― 168 ―

第83回

2010年度秋季低温工学・超電導学会