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Transcript of Y W O / M ) H O ¥ ?n ÷ Ý ä f ù ¹z · ô f ¶ Ô ¶ &} ÷ Ý …!!! A26B RG12_1G/4REF!!! J62...
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!-(BETS)2FeCl4
N. Harrison et al., PRL 90 (2003)
Manganite
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3_<,B QC<+
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Single-turn coil technique (STC) Energy 200 kJ (H, V) C = 160 µF (H) , 263.5 µF (V) V = 40 kV(H), 50 kV (V)
FIR
B
Maxwell stress 400 kg/mm2
at 100 T
150 T 300 T 6 µs
200 mm
r
!!
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Liner
Air Gap Switch
IP
IL
Electromagnetic flux compression (EMFC) Energy 5MJ C = 6.25 mF V = 40 kV
700 T 50 T ! 700 T : ~ 2 µs
B
400 mm
( ) ( )
0 0
2
2
22 20
0 02
( )
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!
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µ"
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= #
# =
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Due to the feed gap of the primary coil 31.36 46.36 53.36 56.36
41.36 50.36 55.36 57.36
600
500
400
300
200
100
0
B (
T)
585654525048
Time (us)
4
3
2
1
0
I (MA
)
2000/6/19Main 40 kVSub 7.5 KVThickness of the Liner 2 mm
probe destruction
µs
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4
3
2
1
0
I (MA)
48 46 44 42 40 38 36 Time ( µ s)
700
600
500
400
300
200
100
0
B (T
)
622 T 700 600 500 400 300 200 100
0
B (T
)
50 40 30 20 10 0 Time ( µ s)
4 3 2 1 0
I (MA)
Break Point
622T
Feed Gap Compensator
Feed Gap Compensator
500 T ! 600 T
2001.6.29
2000.7.14
with FC
without FC
Symmetry is improved !
Y. H. Matsuda, F. Herlach et al., Rev. Sci. Instrum. 73 (2002) 4288.
" 600 T ! 700 T
Cu 2005
ccooppppeerr sstteeeell
S& !"##N 6 "7 6#
copper steel
2266..66 µµs
3366..66 µµs
4411..66 µµs
4455..66 µµss
4400..33 µµs 4444..33 µµs 4488..44 µµs
4422..33 µµs 4466..44 µµs 5500..55 µµs
Feed-gap compensator
Liner
00..88 µµss
2233..77 µµss
3344..88 µµss
4400..88 µµss
4422..88 µµss
4444..88 µµss
4455..88 µµss
4466..77 µµss
5522..55 µµs
5544..66 µµs
5500..66 µµs
4488..66 µµs
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! ! !9!'#!y:!"#!y!>!!$W!FEH/RI!:!7!FEH/RI!?!
Bohr radius of excitons in the bulk GaAs !
a B ~ 120 Å! 500 T " ～ 55!
e
h
B
AlAs
GaAs
AlAs
a B ||
a B ! " = !
12!!c
" #
$ % Ry*
GaAs/AlAs MQW
"
Quantized energy of the cyclotron motion ,!
Energy of the spin Zeeman splitting ,!
Radius of the cyclotron orbit of the ground state ,!
Density of states of the Landau levels in 2D system!
!"c =!eBm*
gµBB
N(E) = eBh
!CR =
"eB
Very high magnetic fields in the megagauss range!
B
[T]
( m*=0.1m0) [meV]
( g*=2) [K]
[Å]
[1011 cm-2]
10 11.6 13.5 81 2.42
100 116 135 25.7 24.2
500 580 673 11.5 121.0
!!c gµBB "CR N(E)
Electromagnetic Flux Compression"
Image Converter Camera"
up to 400 ~ 600 T
8 µs
Combination of 500 T- fields and !the image converter camera
GaAs/AlAs MQW 90 Å/50 Å!
#!!!!!$##!!!!"##!!!!6##!!!&##!!!!'##!!!!!!!!!!!!!!!!!!+!>8?
Bohr radius of excitons in the bulk GaAs !a B ~ 120 Å!
e
h
B
AlAs
GaAs
AlAs
a B ||
a B !
#7/:!#6///9!N#!y:!'#!y!
500 T " ～ 55!
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$ % Ry*
120
100
80
60
40
20
0
Boh
r R
adiu
s (Å
)
4 6 81
2 4 6 810
2 4 6 8100
2
!
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v* = 2 +I(3+)
I(2+) + I(3+)
3.00
2.95
2.90
2.85
2.80
Yb V
ale
nce
403020100
B (T)
3.00
2.95
2.90
2.85
3002001000
T (K)
'!@!
O_ !!
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1.2
1.0
0.8
0.6
0.4
0.2
0.0
5 K 41 T
Yb2+
Yb3+
1.2
1.0
0.8
0.6
0.4
0.2
0.0
8.968.958.948.93
Photon Energy (keV)
5 K 0 T
Yb2+
Yb3+
Y_I
1R_E
BC/!
r
Inte
nsity
(cou
nts/
10 µ
s)
34.0033.9533.9033.8533.80
2! (deg.)
1.001 1.000 0.999 0.998 0.997 0.996
a / a0
7.1 T
10.2 T
0.5 T
3.7 T
18.5 T
20.9 T
13.2 T
16.0 T
25.6 T
26.4 T
23.0 T
24.8 T
30.3 T
27.1 T
28.8 T
50
B
AYbInCu4 (220) reflection
Y. H. Matsuda et al., J. Phys. Soc. Jpn. 75 (2006) 024710
0.08
0.06
0.04
0.02
0.00
FWH
M (d
eg.)
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(c)A
B
2
1
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grat
ed In
tens
ity (a
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M, d
M/d
H (a
rb. u
nits
)
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B
0 dM/dH
M0
1.000
0.999
0.998
a /
a 0
(a) A
B
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( !
( !
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(
!7 "N $6-## !!f!!$S-##
Y !S
+=!0=!i
!0 !0 i
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