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25T無冷媒超伝導マグネット強磁場超伝導材料研究センター
最内層に高温超伝導を用いた無冷媒では世界最高磁場を発生する無冷媒超伝導マグネットです。52mmの室温ボアに最高 24.6T の磁場を発生させることができます。長時間安定して精密磁場を発生できる特徴を活かして，高精度測定や長時間熱処理などに威力を発揮します。
Magnets (HTS): 10.6T@188A Magnets (LTS): 14T@854A
3 CuNb/Nb3Sn Rutherford solenoids
φ300 mm x φ539 mm x h628 mm Max. hoop stress 251MPa
3 NbTi Rutherford solenoids
φ545 mm x φ712 mm x h628 mm Max. hoop stress 138 MPa
38 Ni-alloy/Bi2223 double pancakes
φ96mm x φ280 mm x h390 mm
Max. hoop stress 396 MPa
Cooling system
Conduction cooling using He circulation
HTS: 2 x 4K-GM cryocooler
(3W@4.2K, 10W@8K)
LTS: 2 x GM/JT cryocooler
(8.6W@4.3K)
Shield: 2 x 1 stg GM cryocooler
GM cryocoolers
Single
stage GM
REBCO
insert coilLTS coils
Thermal shieldVacuum vessel
Cold stage
(upper side)
Cold stage
(lower side)
Buffer tank
compressor
1st cold stage
2nd cold stage
1st heat exchanger
2nd heat exchanger
GM/JT-#1 GM/JT-#2Single
stage GM
REBCO
insert coilLTS coils
Bypass
valves
#1,
#2
JT valves #1, #2Thermal shieldVacuum vessel
0
200
400
600
800
1000
H1 (Bi2223 coil)
LTS coil
I (A
)
-3
-2
-1
0
1
2
V (V
)
2015.11.13 25T-CSM
(Bi2223 insert)
4
4.5
5
5.5
6
6.5
7
7.5
0 20 40 60 80 100 120 140 160
H1btm
H1mid
H1top
L1
L2
L3
L4
L5
T (K
)
Elasped Time (min)
0
5
10
15
20
25
30
1990 1995 2000 2005 2010 2015 2020
IMR-HFLSM
Year
Cryogen-free
Superconducting Manget
(Conduction cooling)
B (T
)
24.6T can be generated
within a 1-h energizing
time!
Most of CSMs were obtained by
the High Field Laboratory for
Superconducting Materials
(HFLSM). We achieved the
world‛ s highest magnetic field for CSMs of 24.6 T, denoted as 25
T-CSM.
10
12
14
16
18
20
22
24
26
-300 -200 -100 0 100 200 300
B (T
)
Bmeas
=24.57 T
z (mm)
IHTS
=187.8 A, ILTS
=854 A
１時間で 24.6T 磁場発生！
無冷媒超伝導マグネットの発生磁場世界記録を更新！
LTS HTS
25T Cryogen-free Superconducting Magnet
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