Superconducting magnet for a disc generator of the FUJI-1 MHD facility

Superconducting magnet for a disc generator of the FUJI-1 MHD facility T. O k a m u r a ,

S. K a b a s h i m a ,

S. S h i o d a

and

D e l J a r l m e n l ol E n e r g y Sclerl(.:es, T o k y o I n s l l l u l e M l d o r i ku, Y o k u h a m a 2 2 7 , JL-iparl '~NiJl.:le,.,-Ir P u v v e r E q u l p m e n l Deparlmenl, Tsuruml ku, Y(.)k(.ih,.~lma 2 3 0 , , J a p a n

Y. S a n a d a *

ul Tel:hrlol(.l!.;ly, 4 2 5 9

Tut;i~iLla ( . ' : o r p o r a l l u n ,

Nagalsula,

2 4 Suehlrl.~-{.:h(.),

Re{.'e~ved 18 May 1985 The d~'slgn w u r k ijn(l esling are desl;ribed ol a SUlCe..r,:( n ( ' l u l r g ITi,.tgrlel I() t.)~' l:l)uple.d with a dl,;l: M H D gerleralur in Ihe ~:lused (:yL:le M H D Hxperlmenh'.~l far:lilly FUJI 1. The MJperc{:~nchJ(:llrlg m a g n e l (.;unF, tsl,.% ot I w o 5HpI-II,.:IIHCJ vvirHJlngt:; ul I h e l.:lruular H e l m h l l l l z lype. A nHW ~lrIJ(;lur.(-', b e l w H e n Ih~.. w t n d l n g s h a s b e e n 13rup(.)sHd wi'it(:h ~iiJ[..)[.)()[[s I l l e rrlagn.l:'ltc; h.)n;e indlJl.:Hl'l b H l w e e n f i l e IWll w i n d i n g , ' : ; and, al I h e isan-le l i m e , rrunlmlZe,...; h~..,.ll lelJki-I!."le' ILl ltll:' w l n d l r l g F , A serlH,':.; r)l I.H~-ils hi.-I~...,s h o w r l IhH t ; u ( ; c e s s l u l p e r h . ) r m a n c ; e ot I h e m,.-ignPI

Keywords:

superconducting

magnet;

MHD;

lh~' I I I I I I I;wLll~ ~.;I,, hlllll I~'l~.~,~'url April l~)~l ,Jnd M;in'h lU~.-I ;~l IIn' I ~l~,'~ IIl,,llltlh' Id ]cchll~4~;'~ (I I I-i h~ IH.I r,,ii{ ' ~'xll~'rlnll'lll,,, ill c h ~,.,'d c v c h ' M H I ) vh'{ Iris. ;11 i~ n,,~'r ~/L'lP,'r;llli_m I II [:, ,I I-,h~v, alibi, It I;IClIli~' U,'llJt I l H ' r l l l , I I IIIIHII ¢11 {, M W ;llll_J h",l IIII1~' ()1 I llllll, V,,IuI',~' V,l~rklnl; ~_,;u, 1~, i'li'~. Irl m', Ill ;111 M H L) L h;lllll('l

I,, rl{'l {",MII~,' h) ;ll IIh'~, {' hi!Ill

{'l~'~.ll~)tl h'nll'~'l~lll.ll~' ,tlllJ Illl', rl'qtllr~", lil!..,h Ilhll]li('ll~, II{'kl , d h ' l l ! , l h [ll~.'reh~n' a ',IJr~L'IL{III~ILILIIIIIJ III,-IIJIn'1%~,a', i)lallm'd hi I',' ii~'.,lalh'd I h v M i l l ) I]~'ll('rJl{)l L h;lllln'l tll Ihe F-I_I.II I ~;, (ll',C l,,llal'~L'd a n d i llll;,('{.lllL'llll',, IIn' ~ I l n h l q / ' , ,.Iru (d Ih{' I I ~ - I n ~ l u d l z I,,Im in v, ht,,. h I~,,)~.ln ill,ii V~,ll)dllll2'~ I;l~(' {',JLII qlliluI h';l',/lll!/ ',l)d~.{ ' I~rlV,.'vvn III ~ h l c l l hi I~I~l~ ' ll'lL' ~ll,,~.' ~g,Cl|q'r;llqlr

disc generator

Design

of the

superconducting

magnet

,,\ '.,'1 I~l r~'Clillrl'nl~'lll,., IllClll(Jllll~ M H I )~ l l a l l l k ' l ",l/,'", i n ' h i ,.,Ir~'rll..,llll., ; l l n l ,dh4'r r~'lah'd Ih'm,., v,.~'r~' Ii',.r~l al l i b ' ~ull,.,~'l h~ M'r'vu d", ;I I~;P.,t'., IL~r ~l~',.,l!Jlllll!J Ih~' Ill;I)/Ih'l I In' c h , i l l l h ' l

l,t/L' a m l Ih~' l l~'hJ ,,I n'n!,l h ,,p~'L.I In'd ;ll~' ,..,ll~w,, n ill ! I,afm,' / v, h~,r~, lib' %~,~IIk fill.' I.';J'., h)r N I H I ) I ~ , ' r IJ~'ll{'l;lll~HI ~'llh'r', Ihc ll~ w / h.' ;J lid I In'n I1~ #,~,',, ;i h m p I I-i(.' r;i(ll;iI ~11r~'~'l i~ ~t~ ~1 I I n' {J I~I)L

I tl~. r l l l l ) l l l l l l l l l ~,~hiliiK' ,~l l i l t ',ll[h'l~..',m~Jll('h~[ ~k,al II, c;Ih u l a h ' d ;J~, h 4 h ~ , , F I['..,I ,.I r , l l c d L l l l l ~ ' l l l ; l l l d ,.Ill ;l'~ I'l;l~i~ ' CI.III~'III ~l~m,,ll~ ~l IIn' WIn~tlll!~ ~.~,~'[~' d~'~.ld~'d Ir~Hll IIn' i ~ l n l ,~l v u ' ~ ~l cS'~M,ill~' ,,I,iIqlll~ I h~' h ' q L l l I C d rll;lIJIh'll~ I n ' h i ~ a ' , ()l~l;Jll|l'd lhr, H[l..,li rll.Urll,,.'rn~.'al Ih't;lll~HI l~r~w~'

In Ih(' dV,,l[..,ll {)1 lib' :.,I.II~"n~ ~ll~lLl~ InnHz llla!..,tn'I v,'llk Ii ~,,, L{,lld~'d ~,tlh Ih(' (lt',,~ !...,vuh'r,tl~lr ',,,p{'{ I,tl ~.,nn' ll,n/ h~ I~(' I,Jl,.~'ll I(~ MIDIS(Ill l i b ' l.,~'I~;Irah'{I ~%illllllt!]'.., LI~J;IIII'.,I tin' illl~ll uh'LI[¢HII;.I1JII('IIc hl[I.~' trldltCe{I Iml~,,.{'cn Ill,'ill ;tl IIn' MiIIk' Illll{' l l l l l l l n l l Z l l l ! ] I,'al I,'al, a!..,~' I liP, i,., iii ~'iH)II;I,..,I

h~ ~l ,,,.l{hlh' I'~1'~' ni,u/ih.I

,..'~.ll'd~'~l v,.llh

Iim'al

IW T~".,iillui

( i~ll~l;ill~ii

(lll l I-'2'21!'b Hq (_)!-t(14H,t-()!-I $ ( ) J ( ) l ) .' I t-)H!-, BulIHvv~.lh e ~ ~, II:'ubh',h.r~.) I. Id

~

MII[)

tJ~'ll~.'l;IhH'," III V, lll{ II IIn' I'e.,{) v,,irlcllllp,., { , l l l I~' iii c{HiI;icl V, llh ~';t,'ll , d l h ' t al IIn' Illl~.'al rr!,l{)ll', ,~1 Ih,' V~lll{llnl,'., a l n l I I i v r v h ) h . ' l i b ' ,.,i.Ii~piHIIIl!] ,.,IrLiCllir~' i,, r~'l;lll',','l% ,.,lllIph' I ~n Ih(' I~r~',,~'lll lii;t!]li('l. ;i II~'~A ,.,llrqu~rllil!:, ,,l[Ih I l i h ' III Ill~' ~ I~'..,f;it %~,l'il~ h li;t'., ,I u~H|'.d4h.'r;ll'~l'~ I(Hl!.q'l lid';it II;tl|',ll~rt i'qtlli ill Iliu V,,tli~llli!]~.~ ,ili~l ,t liUV', l l H i t l u ~ f l c H i ',%l,h'lll I~'fv~.'~'rl fin' '.~'[h.tF,.th'll ~.t"~)',l,if', li,i~,~ ' I~'~'11 [~l~l~",~'~l ( '~)l~l~r ,.,Iatull/u~l .'NI',-T'I ~¢HI~II.ILhU', c,tti ~,h'hl tin' I~'qutr~'dllhl!_.'ll~'it~.. II~'ht',~)I '4 ' ~ T , i t l h ~ ' u ~ ' t l l r , l l , l ~ . . l ' , , d l l n ' ~ll,.,~. 4 ~'1 , i f f h ~ ' a u ~ . h ' , l n d ;, -I 'T ,It lln' u , H l l ~ h : T ~ ' l l ' , l l r ~ ' Ill;ll Ilk' rll,l[~lK'l I', u{'lI,il~l,,' an{I i,';l',ll% ~q'~eriil{'(I l In' ~.'~iil{Jlll!J II~ I~('q*l ~'"4C~1 ;tll{L ,tiq)ll!~ ,.,1!..: ~h.nld,. Ihlti¢.,ll,,~ ' %%(HI11~l I )~"',lJ]ll ',llldlU', ,trl{I lhIrJ()rllUtll~ (' Ik'l.,I I,' V,~'I V Itl,l(l~' I~', 111 ;Iihl [~.,llth,i ( . ~ l l ~ l ~ l , I l i ~ i i Tin' Til;i!]li~'I 'Aii", l l h i l i i l i;iClllh'd

MHD 6os flow

.

Cathode

jf'~"-~'~

Winding

'" , , x ~ " ~

Cpa", IIr~w

.~ '-q

,,,' ,,,

I00

i

MHD Ga~ flow

Figure I l~la,,i, iPqUllPrrilJril ', llinP[ dhJlTiPl~l, G.')()( ) ITi ITi 4()() ITIITI, ITid!~IrlHlli. h~h'l ,Jl Jrlqlde', ' 4 3 T, iTiJ!~rle'll( h~Icl

(.'iryol~lerllcf;

1985

h~r dq-,?Jl!~Jl'iirlla II'iP rfb-i!.ll'ieq %Nlridll'iq qf~J, dl')IdiH'P ~I(~I WI-JPI'I vvlndln!.]',, 4:e,rilr( ~, ' 4 ~) ], ITh.l!.]riHllI. ll~Id ,Jl al , ,llhLHh-,, 3 4 T

Vn125

Seplember

483

Superconducting magnet/or the FUJI. 1 M H D fatality.

f. Okamufa el al.

Table 1 Sele{;ferl .'-.el I.)l p.:nr,]nleler.,-, h.)r v(nJurrlP ill lhe b u p e l l ' , i i n d l J C l l l f I') a(:hlevecl

~tLIrL'~ by L'II(_II_n.~III~, .~UI'~ (hi p;.tr;.inleler,~, %I.ILII ,.1'~ i n n e r dlLIr|lelL'L nnLIler dl;Jllleler a n d whJIh ~nl Ihe w l n d l r l [ . TM A ',eiL'L'led nel cnl [~;.Ir,Jlrleler.~ Innr whlL h Ihe m ln ln lL in n v~nh.llne (hi IhL' N u p e r c( m d u L 'lo r i~ aL'hte~ed t,~ I N e d tll l(Ihh, I The sL'leL'led tnm.'r dtantL'ler, n~Lller d t a m e l e r a l l d v,'idlh nnl Ihe w m d t l l ~ , are ~()().() m m . 12NNN nirn a l l d 2()()() rnm, ren peL'llvely. 'The averaL.,e c u r r e n l wa'~ h x e d al '~7 ~ A I n t o - " . whtL'h t.~ relallv~.lv h~w CltnnLIF.~h innr l u l l ~.'~'nn.~lallL' ~dJh]ll~' (hi Ihe wtndtnL}.~. T'he allraL'live bn,Jy linrL'e wan calculah.'d I~) he ~(~ Ions a n d Ihe slnnre(J n l a p n e l i c etler~.:~ I~n be MJ F'~.rc,~ 2u a n d b .~hnl~ IJle L'r,n,,.,, 4ecltnnnal VIeW a n d pll(nl(l~,rapll el Ihe .~LIperL'()rlducln)r Ll~ed I(nr Ihe pre.~enl wlndln[!~,, who.'~e L'har;JclerlMiL',~ Life ;.IJ%n) ll~led in 'fubh, ? 'Thl.'.; ( . ) F H C L'~nppcr 'q;jt}lllzed N b - t l L'nmduL'hnr %~'a", .supplIed Itnml F llrulkawa FleclrlL' (.~ LId. II has a r e l a l l v e l y hl~.,l~ L'ol~Per-rum L'lnPPcl rallnn ( = q ) hnr lull L'r%'o.M;JIIc '~l;.IblllrV nnl Ihe wlndlnL:n, a n d La~llles linr Ihe L'n)~nlIn~.: sVslenl are al;,(n p r n w l d e d ,m bn,lh ,,ides (hi Ih¢ .%LIpc r L'O n d LIL'h Jr The L'ro;,.", ",L'L'IioIILII VIeW ~nl Ihe w l n d l n l , t~ nhnnwn in F'I,LtlII'=' ~ HL'l~ecn evel-%, ll.lrll n)J JIIL' ",lli'Wrk'IHldLIk'hnr, ~,paL'er', nnl ()'~ lllrll IhiL'l~ F R P l a p e w e l e p l a c e d hnr eln-L' Ir~cal In,,ulallnm T h e r e arc '~N lurn;, ol Ihe superc(mduuln~r tn each eh'nlCl~L A l n o b e l ~ e e n each I ~ n ~ e h ' n l L ' n l s 2 toni IhtL'l~ F R P ,,pacern were p l a c e d I-tnalls. ?() elenlenl,, t~ere hehJ by ,,lalnle,,s sleel (~(),-IL) ,,~d~' pluh-,, In t/~.tm',..-/ Ihe J f r L l l l ~ e n l e l l l ()J Ihe ;.,pacer,, I-)el%~eL'll Iile WIilinllll~ ~,.'h'llnL';nl,., i,,, ,~ilnn~,tl The j'~er{'elli~lI~L' ~)J LirL';.i ,)cL'tipled b~ l.~p,IL'(=r.% I,., . 'q)% oi ihc i~d,.il ;]rL'd The !..',.Jl ~,'., bei~,~,'ecn ille ,~pacer;, w h l { ' h are ~.,li~v, n In d{'l;JII in ihl!,, Fi),ur¢ ,.Ire ,~Lil~,,eUlLienilv i=lied ins l i q u i d Ilel=un=. W h e n file II1~11211~.=1I", L'XL'IIeL.L Ihe ~,~,llldlll~ ('XpL' rlenL'e ,.dr;Jill. v,'hl~'h dL'L'IL';.INL'.% IhL' L'I IIIL';.II ~.'Ul rerll den.%l~. uIIhL'.~Ul~erclmdLiL'l*nr Thereln~re I h e d l , , p l a c e n i e n l n n l l t l C %%1nd1111;.% %q,;1% L'.'il~'ttlaled IIIInH'rlL';lil% I1%111~ Itle I'llttle L'lenlL'nl iil('lll{nd t.l~t/nl, ~ ,,hn~N %l.lJ~dl'¢lNllHI Ill eiL~lllenl ~, ;_llld bnHJndLtl%' L'lHIdllllm~, N~nlle,., I .J are M H D !;ener;ihnr

Wmdmq ".h..}pe Winding clmcepl (.':o~hrng ,.:ur.t~.pl Rale.ll I:urrerll Average i:urrenl deri:;Hy Winding inner dhJmeler Winding uuler dtam~.l~.r Wlrlding wlrllh Ma.qn~llL: ileid al I1"1~(;~nlre Maqnellc held al Ihe ~.,]lhi.,:le Maximum rrldgrleliL: he.ld NulTll:)er inl lump., M~gn~,l.: In~re:emlmdc:l..m Sell inn'llJL:ldrnlte Mulual mduelanl, e Sl()r~n::l erlerqy

Cuvl t y

\

whl(,l'l

Ihe

ITiirlnmurn

Clfl:uldr DI,JI')IH parlcake~; Pl.,d i:uohnq al ,4 2 K 2550 A 37 5 A mm-" 5 0 0 0 mm 1288.8 iTim 2(.)L).() rrllTi 4.7 T :3 4 T 7 C) T 1160 336 lurl~ I() H () 19 H 8 M.J

8 >~ I I

,'1",

,-t

Ni')- T i f I hJITlerll r~

I)F HC I,Ollper

a

,,2

12

12

Winding outer dmrneler

El

b F,gure 2

(a) SL:llernal,: dia!:lrdm, (b) I:d,.mpqlal:dl

2

Table 2

[;hdra(:l(-,rl,..~lll:B Ul Ihe '.,uperl;qlndul'.lor

Malerlal Condu(;lor

Nl'p Ti rn( )rll iIiIll ';IZP

t:.i {~ . 8 (.) rrllTI J

Crlll{:cll n:urri-,nl r)ldlTleler i.)l hldmerll NijITil)t-hr ul hlamenl,~ C u p p e r - rl(.)rl i;opp~r rdl II I

3:.'}(.)(.) A (dl 7 T) 70 ,um I 2(.')0

Winding inner .,...'f diameter/.

Cryogemcs

1985

Snde pLal e

9

Figure 3

484

2

Vol 2 5 S e p l e m b e r

Crcm., ~,el:ll~lrl,Jl vi.~w ul li'u-' vvlrldlrl!.:l

Superconducting magnet Io; the FLIJI I M H D tacHity' f Okamura el al.

/,//

Spacer

~".,

Table 3

M,m-,ial I:,,,,pPrh,-',, IJ~,Pd I(.) ~'.,Jh.ulali-~ di~;pl,Jl I~lTll-'rll i)l I:~ll )pier I1~,~''

~"~----~

~"

~

S ~:; 3( )4 L

~ G N

2 ( )6 UL) ~L)~() (.) 2 7 5

(.IF HL,

E 6 N

I 4 I (J0 53 (.)() () J 3

F I:I F'

/-(.i N

2()(.)() 7 (.)(.) U 3

Wlrldlrl!:l

E. E, E,,

!4613 H 7 32 24 I:.15 :.I~H2 36 I 5 3 2 l':g3 () :.1~8 (.) ~ 5 1 (1242

ment.

Li,i ~ (,N, 0',,, N,~ Ne~ N,,,

"E, IVh~duhJ~, Ill hlrlgiludirlal e~l,~hlli'.il v (k!.] mrri-~'), U, rrli)i:hJlu,, ,il IldrlF, v~R.,e eh.'lL,IIl~ll v (k!l mrrl-"), N, P(il,.,,,ilri'h rdll, I SUI'IL~I'III:II5 t'). azlrrlulhal dlrl.,i.Illlrl, i, radial d l r e r l , m , z, axl,, rllrP,,ll~.l

(ELement) Figure4 l::larl~ d kl-",

Ar r,Jili.]Prrii-,ril i,f I lli~ ',pdc,Pr', wl'ili:h are IJh~-'(J bl~lwPeri Ili~

~',llldllll."., ,llld HI",L~ l i l t lar!/cr ~li~.,idarcrm'HI ~1 Ill~' i i I i i r r ',,l~lC ,~1 Ihc %%IIl(llll!J',, I Llall l lldll ~1 I h r , nlh.'r,,l~h' i ~1II I~t' %L'L'II l l , m l Ihr,, I-U.,uvc I- r~ml Ih r,,, l a l c u h l l i ~ I n nl I,,, I i . i t l d Ih.nl Ih,' r l h l ~ . l l l l l l i l i ',dr,llll q~l I h r ,,dlp('rcqlllqLLIc'hlr I,,~fl . HI) -I ~lll~.'ll I,~ ,,,lliall ~.'mHl!.,h h~ I~rcvclll ~ll.h'licll Ill I1.' rll,.ll~li~'l I-lit ,l',.,~l'llll~l'~ ~1 l i l t L i~l.,,Idll I',, ,~hllwli ill F'/L;Itlq' "

[ h r ~lll~lirllJ,, arc dirr~ I1,, ',,urr,nJn,h'~l I-~ InquHt I l r l m m ~,'qlllldlllH'r',, ~ l i K h a r c CllL'h~,,,c~J V~llli ~,dl~.llllrll lacl~c'l',~ ,,~ lllcililal Idl~ll,ill()il ' , h i H ~ l ~IV~'rdilill) , ,il 7X K w i l h l i q u i d i l l i r l l ! ; l ' l l i,.~ illi~'rp~i,,,r~l hcl~ACCll lh~' ~.~i~J ~AlltlJilll~.~ ,irl~J l h c %dl(llHlii l,i~l,,'l wall,., l h r ,.,l.iPll,)ttlri!_., ,.,Iruc'lliI~' W l i l ~ i i ll,ill,.,l~'l,.~ llic ~.'i~'~Ir, Hli,il~ilC'Ik' l,)r~'(' llb fll~' ~l%~i"~IdlL I% im,~i~lrLI helw~'Cll Ih(' ~'lih] III~I,,,,,L',~ dlli~l IIn' %H~'IIIJIII I,i~'l~cl', ] l l l " , ' J l i r ~ . l i l v C lli,li~c,,,llir lir~H Itan,,,p, HI i ~ l l l i I i , m l I h c V,.IL'iiLIrli Idl~.'l~'l ~, hi I h r ~ iliLhlilJ,, ~ ~.P,,l~h'r,lld'~ hHil..,rr H r . i h'~l.,,f.,' Ir~inl I h r s l i e u . i n Im'l~rl',, I~a,,,,,~',, Ihn~.i!.,h I h r I k l ~ rvlnmlcr,,,, I1.' ~ 5 ~(),-1 cYInrldcr,,, a r i d I h v I k P ~limh'r,, I ' . ' h ~ r r rC,lClliri~; IlK' ~.~il.lln!,,,, I1,~, ~lllra~'ll~c t..1~ hHcr I',, c ~ H i v r l h ' ~ l Irih) I~'li,,l~HI Ill l i l t ~ q),-I ', Illl~l~'l,., ,lil~l IIIIql ~.q)ltll~lC'~,,,Iq)ll Ill Ihc I- RP l.~, Itll~h.'l,., 1 I1~'

Z

I?

:..T

I, 1 0

.u

18 I~

? ~

IO

11

8 5

19

:52

,~

12

I

9

7

6

IH,Ilrrnll ~l,,,rd h~r Ihc I~rv',,crll FRP I', (i I() (ila',,', lll~rr

5S,304L F i g u r e ~, SubdlVlMllrl i~l t-,h~lTil~rll ,, dlid bl)urid,:iry i:llrlrllllllri,, c ah;uldl~ iJl!.;l:ihJl i-,rrlt~ril ill I|iq-, wlrilJlriq

I1~

llh",,ilV", ~.',1~ II qll () _~ nlrll Illl~ I,.11~.'",,,~ ,ii~' I , I l l i i l l ~ l h ' d l i p I~l dl IIiicl~rl~.',,,~ q)l I'~ i l l l l l dlil~l dill' I l ~ ' d I w i.'l~lx% i~'!~111 pdlrl ill ~111~ I,I I,, ,,llc~n ill /'l,lllll,' ,'~' Ihl,, I',pc ~1 ,,,llllClllr~' idlll V~llll'.,Idlllli ~,~'1~. hn.,h ~)llli~lk",,.,l~)ll h~rcc,, i l l l i l k ~ ' l l ] w IlK' ,1111~1~'11',~' I , , h hm.',, ll~'l~l'~'ll lib' ll'~l ~q,lll~lllll~',~ (_,IlCll hili~m'.., l i a ~ r , . , h ~ n I h a l Ileal h'al,,ll.,r Ii~ ~11~' ~1 IhL' ~ltl~lltiL.,,., I l i H i l l i b ' ,.,lil'~l~rllll!.' ',lllicltlrc', I'., rr~hnr~l

h) "- 4 ', V~ ',ldC ,Ill(/ I. dlil Illll~.L' qllll~, Ill Ihc r a l J l n l d l r C ~ l l q l l l I- h'lllCill,, iiilliilu.'lrd I _~ ~ I~ I - I I~ rl.'pll."Wl|l i h r .%5 ~(I,JL ,,Idr l l l a l e ', , i m l IlK' ~lll~'r tlLilnl~c'l', dCllld~.' Ilic ~ Indlnl~,,,, %~llil'll I'i)ll'.,l'.,I i I l ~ l l l l h ill (_)i I-1(.' i.l~ripi,r ,.,I,'lhlhzcr Rlll.I I - R P ,,p,l~ rl,, Ik.'l,llcrlal iq,q',~'rllr,, ~1 Ihr'.,r ih-nr., ;11 -I K ,lie Ir.,h'~l ill I,~1,1,' t ' I h r i~l,~l~'rll~ -,,,,~1 I h r w i m l l n ! , , , ~ l l l { l l c ~ i r l hr r ( H l ! , l ~ h ' r r d hi l i t ,I n l l ~ , l l i l r , f l (_IF- H ( c , q ~ p r r ;lll,_t I RI-' ,ll a ~'l'rl~llll ',~lll/iih' i~lllll J r e al',() I~ll~'ll iii Ihi,, [ a h h ' Till' ~ll',,idm r i m ' l l l ,~1 I h r ~.~llldlll!...,,..il Ihc r~llrd ('l.lrlrnl h'~.rl Ill 2~'~1) ~, , u l I h r tM,,r, ,~1 a n r l ~ l a r l / r d ,,,.;Ih' I,, ,,lll)~.n In I-'l,!~lll~'(~ I li~' rHili,II ~'~, r~ili,~lq ill iilll] ,.i k i,iI ~ i Hil r~l~.lll )ll i iS I hc

l h v IH~'~l~clc~l ~,luc.. ~1 hral h'al, a!.r Ircml

,~lll~'I p a r l ' , ~1 Ihc rny~l,.,lal a n t ~,llllllll,.lll/~'iI III I,H,h' -I ] h r ' , c l l c i i i a l t ~ ' ~ I~'~ ~iI I h r prr'.,clll ,.,liprr~'~mdllL'llll!] n~hq, n,:l P., , , l ~ , ~ n ~ l'L~In~n' ~ a n d I h r i ~ l , f l ~ q . , r a p h ,, ~1 ii ,inl~l /, I l i t hrn~..hl a n l l I h r ~ h ] l h ~1 I h r m , U , m ' l air -1()12 IIIIll ~llllJ I.-Igll r n n l rr,.,pr~ll~rl,, I~,'1~ ,' ,% .% q).-I t,~ll,, r m II ,~1 ~llll. h Ildl,, ,I l]l~llll('l~'i ~1 II)11 rlllli ~lllll~'ll ,IIHI ",llpl~lll'l Ihc ~'r\',l,.,I,iI,., Ir~llli IIh' ,JIII,I~.II~,C I - , . k h . l c lll~lll~.rd I~rlv~rrll Ihc I~,lu ~ l r i l h t l l . - , ( h l c ,~1 IIh' cr','~,,lal', i~lll h~' Illl)~.l'lJ Ilrc'l~ ilrl IIIc I,III h~, I1,.,111!] ,I h , l l l , I K ' h~ ,.,rl~arah'lhr~h,,,i i~l IIn' . M H I ) !.'rllL'r,lh H IrqHii I h r ItlaL.,ncl iI i~rl~tqcnl,., Ill l UI III IIlll",~' l I H I l l ~ l l k ' l l l ' ~

(.':ryogerncs 1 9 8 5 Vul 2 5 Seplembev

485

Superconducting magnet/or the FUJI-1 MHD tac~hty: T Okamura el al. L N2 shield

,6[-

!

12!: I

;:

1

i

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!

!

, I

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1

I

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Current lead

! I

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1

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;

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11i

.

.

.

.

i I

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It

Winding

|

|

I

I

i

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101

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i I

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I lilll

FRP(6-10)

I

i

Figure 7

A~,~,ernbly lay(~ul (,I II3~ cry(mlal

I i I ...I 5 I

0 2mm thick glass fiberme~h

0.1mm ' ~ S c a l e of D i s p l a c e m e n t Figure 6 Di~=pl,JcPmt=nl ul II'IR wtrlding d l h , rah-,d (:urrenl IPve'l ul 25~)(.) A - - , Dlhr.)lau=rrlPrll, , orl!:llnal

Table 4

Prerli~;led hual IHdk,.-I!]H pI-'r cryr~il,Jl II~rn,,

Rddl,Jllr.~rl

L N , 1~hleld pdnel

L) (-;~

(.',undu~:li(m

Wmchnq ~;Ul:)r.)rl~; Ll+ad~; lur ITII:'d~iUIPmHrll C)lhPr~,

(.) 7 4

(.';urierH IHdd Hehum I,vel trldil.lalur OI t-le f,.;

6 (.) 8 I (.) ~.i

,Juule hPdl

TIHdl

486

I-I~al I~,ak (VV)

4 53 2 15

I 5 49

Cryogemcs 1985 Vol 25 Suplemher

Compression Figure

8

S(;hHmallL

(~,~ Fiqure 7)

Vl~.,vv

Id

pdrl

ul

It'lP

FRP

(',yhrlder

Superconducting rnagnel to~ the FUJI I MHD tacfltty

1" OAamufa el al

11,60 64(3

200

640

Current lead Conne( lion rnd

MH[I Vo( LJIJITI VP{.,bPI

Wlndlnq

~

~

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///

/

I

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=

I

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Figure 9

S(:hPITMIII. VlP'W {~1 It-I,~ '-,iJpt:,rl,(inqlUl:hrlq

A~/

ITh.~LlrlP

a Ft!:ilJrt~ I()

b I:'h(m.,qraphs ~,1 IhP MJI3~r(;urnduqHiri!.] ITidq._:lriPIr,(HJpl~rl walh Ih~' FI.I.II I Idc.nhty (d) Overall viPvv. (L,) I hJ',l~lJ[.I

The helium refrigerator/liquefier system

h~'lp 419 .t ~'L)I~I h.~x a m l ,,h~n',l In a In~.l.nl I , ' l l u r , V, llh ~I ~ ,Ip~i¢ll~, ,d l(H)(it~ lhriH.ll;11 ,.i ll~Itihl,.'r llllU:

T'h~~ l i c l l l i m I¢lri[~vrah,h,'llCllnL'rtur ,,,y,,,l,,~nl h)r ~.,)ldnnl[.., the ',;Ltr~'rc'l_m~ht~.'ltti~., Iri,il..,twI tl| Ih,' FI_t]I I lactll~' i,, ,.,li,)v, it ,,vll,uriuIs~ ,.dl~, ~u I,~,~:.,,,'/I T I . ' cai",,.lt'ulnlnc,, ,,i Ih~' h c l m m rclrl~#Vtal,~r/ll~lLt~:llvr ,.ir,'q,..' W ,it ,.4(-, K (LJ ~ l i - ' ) T h e I',,.l',,IC Id~.';I [~1 Iht',, ,,,~',,,h.'n119 ,1% h.lh,v,',, Bq'II)I~' vI.,lilil:' ,h~v,'r~ Ihc nnat.,nl,'l h,'Iil.II11 !..,a,., I,, I i q l t c l h ' , l ~,'~ilJi llic

llic~o~)llI'l!# d()wl[ {~L'rLIII(HI,IIIII¢rll,,,l ,,,layl, llll ~ ~% lll¢Jlll!~", .rv v,.,l,:,lIi,,,iil!., hviuJm ga,,,,,LIiq4.'~lI,~ lh,'r,,hl I~,,~, lhrLiiJl.., h lhv II;IIl,,h'FIIJl~i'~ hlch I',~II%iLlvdllih~I%%L)l',;II I',;il Ilic~r~,,~',d;.iI iiiI¢I,,,,\lh'[ lh,' llcliLilil ,,,,;I',,, ~ ,~,,I,,,lh,' v, ilidtlt!.,,, ii i,,,h',I h,i~.k ;il.;inil h, If-.' ~i,hJ I~,,~. ,,'ktth,' ,,.',,,ml ,,,Inlzv wlh'n

lli,' V, ltl,llll!_.'", nr,' ,'c,,h',l

Cryogenic,'-;

1985

,l,,~ll

V(.)I 2 5

l,rh,~

lh'~aI L)llllllt;

_~l) I'~ liLlui,l

September

487

Superconducting magnet/or the FUJI-I MHD lactfity." T. Okamura el al. Put i! ler unll

6PT-1

Pure I ylinder

....

Pure '.,upply ompressor < Storage I _,lank I

I r o n s f e r lube

I'

/

_ "It

.,

"1'

Figure

Recovery ' - compressor 1 1

Sl;hemdliL:

-

Ihehurrt idew~rl

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Cll III CR-2 "! ,I LI

r

JIII ,,.

/

Refrngerato,'/ Cryostat L=quet=er (L.Id bo.I

..

~__..~~ellUm

container

::cc-2

UI the h e l i u m rufrigeral(.~r/'licluufler

VIRW

s y s l u m m Ihe FUJI I la¢:dily

helium slored II,I Ihe Dewar n,,,Iran~l'erred I¢~ Ihe windnnL.,~ h~ mull,Huln Ihern al hqL, id hcl,urn lemperulure ~)1,4.2 K h~r ~=1() h, which n~ .',,i.ill'l(.'lel,H h~r Ihree run.,, ~1' power L.,enerati~m e~pernnnent,~ B~lled ~dl h e l i u m ~ c(~llecled nl,~ a ~a.s haL-, ,.'(.)unl~re~.~ed hv a rec~,,,,ery ~.'~rrlpre~,~(~r. pLirnl'led b,~' u purnh~'r unH and fnnall~ .,,h~red in pure h~L:h pre.~ure cvlnmJer.~

Tests at Toshiba P e r l o r n l a n c e le~l,~ o l

Ihe

I,IILI[211CI

~ere c a r r i e d

(~ul

Figure 12 Tl'ierm(.,m~l~r,; drld hqulrl hPhum I~vHI gau.qHs in Ihe (:ryuMaL CC,, CuppHr-~:urlSl,.-irih:lrl IherlTtiH:~HJple, PT, p l a l l n u m r esnblarli',e I I'l~r rriq )rriei ~,r, C(.~R, i:ar b( ) ~ !:lid.,,,; r H SI'~I dnl',P, IIlerm(HTleiPf, CR, L:,'lrbqlrl rH!,;I~IL.IrlI.:H level t.]du,qe, LI, i:unJlnu(JuN h e l i u m level irtrlli:al{ ~r

Ill

'T'~).qtlha Irl Fel~ruary IqN,-I. hch~re Ihe rll;.IL.~,l,l,CI WLI~ L.'q)upled with Ihe F'I.IJI I la~.'llll~, The h e l m m relrq,,erah~r/llqtlerler which ~u.~ u;,ed ,'JI 300

I

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1985

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Cryogenics

,

B

Fiqure 12

488

,

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3o:l^u

,

Time, h

Figure 13

,

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Vol 2 5 S e p l e m b e r

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72

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56

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72

84

b (a) AI Tn~,hlb.J Curpural..bn, (b) ~1 TIT - -

96

Time, h , PT

I,

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- -

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--

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m

Superconduc#ng m a g n e t / o r the FUJI. I M H D tacd/ly T(,,,hlha i,, ul ~l d l l l e l c n l I~, pe lil Ihal a~ allal~le al Ihe I-.Jl II I I,icilily [11(' l i q u c I w i ,,~,~,k'ill ul.,cd I'llr pvrhlrliiailCC k':.,I,., al 'Ti),~hlha Ii.'t(I a IILIIJ~..'II( ill11111 ('apablhl% (it I1)()1~ h -I and iclrl!.~crall(m rapahilll% (il 3()() W nl 4 f) K. Tlu',,c %.aluIc:., alC ,Ihi_lLII IIir,.'~.' linK',., IllL.,tu'r ltldn I l u , . ' ,~1 Ihc FI_III I %V%ICIT1 I-)U[II|I~ lhr p(~rhIrllhJ11( ~' [C~,I",. Ihc hllhiwin~, ITIP,JhLIFVIIICIII;,, U,L'(C lll;Jd~.~ h~lilll~.'ralur(. ' %';Jil,.lll~irl ill IhL' windtn}.,h lJlJrlll~. II1~' L'li(1~d(i~ll I.'~Fi)~.'~.'P,'., nlLI[?IICIIL' I]diJ iJI,Jrlhull(m In Ihc disc 1.~'ncr.mir, LlU;Inlnl~,' (11 hi,h.'i/ (~11 h e l i u m ;I,., a lIK'arl,, (il CLIICLll,IIIIII~ hc;ll I{:al, al.,.v ll_, IIic Wllidlnl]~, Lllii] :drain ill Ihi ~ L'illln(,tlll)ll r(id~ ~,hll%~,'n ili ~I,L_[IIlr' iJ ,Ih LI rJrh~LIII',, ill c;ih. lJl,Jlinl? Ih¢ ilIIF,JL'II%(' h(Id~ lii(~.c

Th~ I~(~',iliiinl'., (fl Ihr'rltliUltCh~r~, a,ld ll~.lUl{J helltilll Ivvd ~/au~,~:, ,r,' iIh.i:,lral~'d in tcI.L~t//d/Z. Llild ,.drain L.,aul}(~,, w(r~ J pui (irlhl llu: L'(_iFIIICL'II(III rild~ PILIIInLIIn R';;i,Janc¢ I tlL'F nil illlClCr,~. ~.'LIrh( in- .~'.[d h.h r c,d'.,,I LI [1~.'(.~ I tlcrnl( m I e h.' r,~, a lid c(iripcr-c(~ll,.daillali I}l(.~llll()kllupI( '~., w~tr~- ~.,('1 (ILIIhldV Ihc

wall ~,1 IhL' h~llLIIn c i m l a l n , r WIIh Ilu' hi'll~ ~1 ~'~pl~'r L()flSlLIIIhJII llicrml)ci)l.IplC:,, ~,~¢ ci)lllil ITIC;I~LIFC h'rnpcr;i IIIfV'; 7X K ( l i q u i d Illlllil.v,t~rl IUnll)Crilllll¢' ) F'lallnunl FC.%I~,Iunvc IhcFIn¢illlCh.'r'~ viL~rc u,,c~l li)r rl|L.'iihll[lll~ Ivnl p¢lalurc,~ It,ira fill)hi h.'nlI'DCr,.IILIF~.~ li) _~() I~, ,Iml L,3rhl)llI?~LI!~% rL'hlhlLII1Vi' IhL'rnlillrlL'lcrh wch' u,,cil li) IIIL'LI!..~LII~.' IINIIpCFLtlLII~';, I l l i n l ~;(I hi ,-I .~ K. (.'art~qm rL'hl',l,.llt~.~' h~vvl ~2,LlU~L'5 L l l l d ;I L i ) n I I I I U ( i U h hi'llurll Icvvl III(]IL',.IliiF ~',(.'rc all,.Iq, h i d Ill Ihc IILIl.lid hclll.lnl rv,,rr%'(ill ] h e h ) l n t i r Ill(Jl~.'JIcl~ Ih~' I.Ipl}¢r arid hiw('r Ililllll, ill Ihc l i q u i d h('llLilll ~ah'P, Ic~cl alid Ih(' lah.'r InL';.I,~LIl~.'~, llqlliiJ h v l l u l l l I v v d ti )1111II u( )LI,~I ~ B r h , n ~ (:'~,ClllnL; fill' llhJ[J.ni.'L ('iiilllrl~ iJ()t.'~'rl ill Ilu J V~lltdlll[!,% WLU'; ~.'Llrrl('d (iuL In Itu + Vili)ll[l!~, d
ir)o A

Mode I

Mode I

i O

12

2

14

I(.)O A

/ 0

IO

2

Time, mlrl

Mode ~2

(')

12

T line, rain

1(3C) A

/

Y. Okamura el al.

IOOA Mode 2

2'

7

0

Time. mln

2

4

Time, mln 2550A

IOOO A

o" o.,"

~C)OO A.i,r-'" oJ oo

I

Mode 3

m•

Mode 3

IO0/°'

C)

2O

3O

50

85

T nine, mln

2/

2550 A

160 180 Time, mlrl

225

2'550 A I

Mode 4

Mode 4

~ 0 0 0 0 IC ) ~

a

Figure 14

O

20

_55

50

83 T irrl~, n'lin

ll5125

b

(')

45

Time, mm

13~.~

18C)

Culr~-,rll L har!.]ln!.] ar,:l dlh~.h,Jrqlny upHr,..lllcirl m, dP~J (a) AI Tn,Jhlb,..i C,)rpurallun, (Li) al TIT

Cryogenics

1985

Vol25

September

4.89

Supefconductmg magnet for the' FUJI. 1 M H D tacth'ty." T. Okamura el al.

'--"-------~.~.~,,,

i

2'~() A and kepI cc)nnlanl h~r ~() rain II wa,, Ihen dccrea,~ed [.,raduall~ I~p I()()() A and I'mally ul_',ruplly decreased h) zerl) ~la~e,~ I t were mainlY,' hi c d l l b r a l e Ihe measurlnl.a in.,drunlenl,., and h) Marl h-.'.,llllj], Ihe wlndlill~',, 'The nleasured mal:,nr'lle IlehJ ~lrenglh a h m g Ihe l a d l a l dlreCll~Hi In Ihe cenlral plato' ~1 Ihe dl~,C gel)eralor i', ph_dled in f't~t.'~, I~ Ior d l l l e r e n l c u l r e n l level,~ (2'~'~1) arid I1)1) A). and Ihv p r l d i l e predlcled by Ihe B l l ) l - S a v a r r s eqLILilllm I", ah, i) ,,tll~wn in Ihi,~ Fil~llre II can he ,,een Ihal Ihe m~lXlillUlil rlehJ i,I .-i (',7 t w;i,¢ ~blLIIIled al Ihe cenlr.ll ,JXI.~, ~1 Ih¢ diM.' LIIid ,iJ 1~ T Ll[Id l~,iI 't were l l h l a l l i e d ,..ll Ihe am~de and Ih¢ ¢'atlml.fe. re.~peclivelvl ~ h l c h a[i,,ree.~ well w l l h Ihe c.ll~'Lllllared ~,ah.le&

3.15 ~o

010 o

U..

00'5

1 I

0

I

10

20

Radial

I

I

I

LL

T'hL' Ilnl~'

I

30 40 50 distance . cm

60

Figure 15 Magrll4lll: held rli~Hiibulil)n ,~hmq Ihe radial diri, CllOn in Ihe c e n l i a l plane ,)1 Ihe (Jlb(: .qHrlelalq)l O, MH,JbUI~.('I vahJu al a ,:urrenl level ,it 2B5(.) A, I i, nlPa,.,urerl value al a i:urrerll lew-d ill 1 (.')() A, I , I:dll:Uldlel"] value

I

'

i

i)[

Ihe

helium

¢ . ] L I L I I I I I I ~ ' ~,l I I q L l l d

lilt

I'rl)iII

A dlller,, h i l l ] l i l l y Ir1~rrl Illal III WliidlriL., B 'T'hl4 d l l l e r e n ~ e arl~,C~, Ir(mF II'le nllL.,hll Y dlllereFiI Frla'~, I11~w r;lle (~1 h('llLInl IlFrl)l.ll...,ll Ihe itFh.'l~, i)1 Ih(' Iv,'c~ wlndlFit~, A l l e r cl_Hriplell(Ul i~1 life CI~ulIFIL.,, d~wFi i~l-)er;lll~llF ~)1 Ihe wlndlnj}~,, ~i cLIrreIFI cll;irL.,inl} and dl.~.'h,lr[Jlil[.~, le'.;I was varrled OLII ThI~ le;,I c~msi,Jed ~i110ur nl~)de,~ ill llr)erall¢ilF a,, shI_IWFF II1 FI~.tlII'I'/4ll Fir,d. l i l t WliFdllll2~, werv char[:ed LIp hi liii) A ~.'IIrFCFII levvl. LIFid Ihen Ihe i. llrrenl wLP, decreased a b r u p l l y h i l l A In Ihe I h i r d .~dLi[J('iiI Ihe upcra IIOIF Ih¢ ~.'lllFenl WLi~ IFl~'reLi~,ed hi I()()() A.. ;.liid l l n a l l y ill Ihe h_lulrlh ,,I;.i!~i.- ii WLi,, Iiicre;i,.,ed h ) I h e idled ~.'LlrreiFI level i~1

20

vi'jlrla,ll(m

helium, r e , ~ e l ~ ' l l l r ~.'='~ measurvd Iw I h e L ' I ) n l I I I L I I I L I N hellLinl level, i'lldlcal()r Io d e l e r m l n e heal leakage hi Ihe winding.,, (/'~tmv Itr~) T'he da,.,hed line', m Ihe F'lgure rupre,~enl Ihe varlallCm w h e n Ihe Wllldlil[2,.% were nl~l charpe,t, and Ihe ,~d,t line,, repre~enl Ihe v a r l a l i o n w h e n Ihv V~llldlll~',~ were char[:ed F r u l n Ihe !?radlelll ()1 Ih¢ ~,arlall~)n il han heell h~und Ihal he,.ll h:al~ap, v Ir(~m Ihe ',urr()ui'ldll'l~sIh ~ I W and,, iFichldlnl.~ ,J~LIIe dl.~'¢lp,.llFIm, tl I~'C~FIFe',, 12 W The,,e va!He,, arc le,,~;, Ihan Itl~,~e predlcled Ill

rl)Ll!~h

e=~llnlLIIHFFIh,

W h e n Ihe Faled ctlrrelll levvl ~a.~ c h,lr[.,,e~L a ' q r L I I I I WLI,~ deveh~ped in life clmnecll~m Fllds bel,~cen Ihe cryonlal,~, ~ h l c h wa~ mca,,ured h~,. Ihe.~lraiFi gaHge', T'he v a l u e l d Ihe allraCllVe body li)rce, e.~lliFFared Ir~tn Ihe nlea;,ur¢i.t~enl.~, Wa~, 1t() hHF'.,, w h i c h wa,, alm~,d Ihe ;,;line, JN Ihe dCSF,.I=UF value

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490

Cryogenics

1985

Vol 25 Seplember

Superconduct#ng FIIIII 1'3~ilil~ L)lirillL.,. lilt' I ~ ¢ r h l r l i l ; l i l t c h",ih '31 T I T (Cl, l l i t laily ;11 Ihc linK' ill t'll;llIJill)~ ;llICI ltl'.,t tlilrQinQ ill llll' Wlliltllil.,M Ihc i l i l ] uc nl ' ¢ , , ill llic lii;l!jnt'll, IichJ llll Ihl' ,.,LlllilLIIlihiiQ ~.'llllll~llnerll',, ill Iht' I-I_1.11 I (l',l.., Ilic hc;ll i,l.t Ii,ililJi'r Ihc M H I ) c h ; i l i n c l , Ihi: ,~t'ell i l i l i ' t ' h l r i'h') ttl'li' i l l i , l k ' , ¢ d A l l ihc nit''3,,Llllll,I..' in,.,Irl.lnl~'nll.., ,irid clit'lrlt',Jl l i l l l l l i l l 'W"ih'nl', ,,lllll~t'lJ ilil ".,llJIiIIIt"3111 t'llt'k'l I r l i l l l lilt' ill;l!?lll'llt Iich I W h e n Ihl' lii,i!..,lil'l ~u;, t~)Liplcd l t i l l i Ihc Pl_lll I I~lt'llll\' ii tt'3h Iliilll!,,hl Ih,iI IIic h ' m l l ¢ l l l l l J r C ~ , l t i d l l l m ill Iht' WlllllllllJ,., iJl.lllllQ Ihl: L'lilll iJliwrl prllcc,,,, '3111] hi''31 Iclik'31.,(' hi Ihe Wiill/lli!7,~ 111'3%d l l h ' r ir~rli I hli,.~l' iflH'3inl'd i]UrllllJ Ihc Iihl', ,il Tll,,hlh'3 ,,lllCl' '3 d l l h ' r l ' l l l IVlle ill h e l l i l n i i ¢ l r l Q l ' l l l h i l , , l l q l l C l l t ' l '3nd ,i ~/llll'rClll IllJIl~J~'r l u h e %~i,, u,,,t'll ill Ih~' [ - I I I I I I;itihl~ .%_'ll Ihc hilhlt~lnl.., iil¢;iMirc ii1~'111,.., I l l ' i t ' i';Irrl~'d lll.ll (lllC'l' lllJ'3111 ;11 TI]- I¢llll~Cf,illlrc' i;irl'311(lll ~il Ihc t%llldlll!J,, ihJllll!J Ih¢ t'lllil iJliwll plrlll.'l~,~,, JiId q l l ; l l l l l l \ ' ill I ~ l l i l i d l l l l ht-IlUlli T h t ' l l l i l i m ¢ h ' r : ~ ;liid l i q u i d hcllLIni Ic~l'l IJ,~lilQt':, ~t'rt' Id'3ccd dl Ihl .... ~ilnc pill.dill)n% iii Ilia' t'f]'li;.Jill,., '3'.., I h i v %%t'r~ dllfllllJ Ihc h:M ~, iii ]-i i,,li il ill [_l~,h~rl' ¢~,t'IIIIIQ Ille Ill,l!..,,ncl t'llllhlll7 tJll~Aii w'3,., t';Jrllid ilLIl III Ihc ,..,'31Ih' Wily J'~ II %~L1%iJiirlt' LII 1 il~,hll~,i T h e t'lliiilliQ d i i w I I i.h,lrLli'h'rl%lli I., lilt' prt"~cIIIt'd I11 ['l,!lli/i' I ill l hi;, t'l).'l.lrt' ,,hllw,, Ihal II II_ilik n c l i r l v qfl h hi t'l_illl l]lit~..ll Ih¢ %~llldllljj,,, ~ h e r c u , , iii I h ( c'3,,t: cll Ih¢ h"q,, ill l l ~ , l i l h ; i ii h_lllk 77 h P l l r l l - l el l l l l i r c, ,i iril.irkl'tt iJIIIt'rt'nc'l' t~,il,., ld~scrved iIc'3r Ihc Wliidln[., l i l i l h l n l l e n i p e l a l L I l e Iri Ihe t'a~¢ ill lli¢ r¢,,,ull,~ ~d~lulliCd durHq., Ih¢ leM,; iJI ]-ii.~hlhu '3 ,.,nlllllll-i t'llr~,'l' w'3,,, lll~,~cr%'i'lt l l l l lii¢ t'ollilnl.~ l t l i w i i p f i l t e.%~> hl.il ii] Ih¢ t~i~t, ~ll Ihe t'.%pirllri¢nl '31 Itit- P U l l I l u t i l l l V II w;i;, nol ;~irilllllli Lind '31 II)11 I~ II itiVldcd i n h l I ~ l l p'3rl,, i~t'tuu,,' lilt' r('lriQ¢rUlllln nilllJlt w'3;, t.'h'3ill.~l:l.L Till' vuri'3 Illlrl Ill liil' t'lllll d l i w n t'u r%'c.~, In F'l~lttt'.~ / tu '3lid #~ i,., t''311,>t'd tw l i q u ¢ l , ' i t l i l l l i d l i d rl'lrllT,¢l;J1ilni .~V~dini d i l l i r t ' l i t t % l h ¢ t ' u r [ ¢ l i l t ' h l i r g l n g urid lJi.~t'hallT, iill., It'kl~, al~ll t'i_lll.~lM¢d i_tl hll.lr illlll]e~ ill OpCl'311i_inl~ ;I ~, %h(iwn in t, lk£11rl, I,.lh, ~1,'17¢k I '3nd 2 wt'r~' nt'a[Iv lilt" ~,'311iC ,i:., Illll;,l' ,31 T'll~Jllh,3 In Ihe I h H d .~l,q..,¢ Ihc ~lpl'r,311(m c u r r c n l wa,, m t r¢'3,,¢d ,dipWl,,¢ 'qarltnL.' I r l i n l () A Ill '~1)I) ~ I n l l n '~()0 A hi 7'~() ,~ 1tirol 7'~() A hi I(I()() A, a n d I h i r e a l l i r '31 ¢;.It'h .'.,l~'p lily currerll wm~ irit rem,ed h~' ~11 A Iiii ii re'3chl:d Ihc r,31cd r u r r e n l ,~1 .~'~'~(I /~ I-)urin~., Ihi;, p c r i l l d Ih¢ t~llccl.~ ill Ihc mal:,nC'llt' I'lchl llll Ihc d i l l c r c n l cllml~Clllcni,., (~1 FI I.II I a n d '31,.,ll llll lilv lll(''3,.~urlll~J, ii1;.,Iruml=lll,.~ wl=rl ' t'hl%'kt'lt '3lid II w,3~ llh:,¢rv~:d Ili,31 ~lll ItlC clmlpllnenl,.,~tl Iht' P U l l I ,3,.,w i l l ,3;, ,311 Ihc nlia!,UlilllJ, i i 1 M [ u n i cn l ; , w l l r k c d nllrrri'311v I-'in,311V, Ih¢ t'l_llrl'lil W;.l!.~ in~'rl.',31.~t';t tllnllllil~ll,.~lv u p h i Ihv

magnet/of

Ihe FLIJI-1 M H D

/acd#ty

T O k a m u r a el al

i;ih'lt i Lirr¢lil levcl ill .> ~(I /~ ;irill W;l', kcpl t tlli,d,illl h~r UII m i l l L)LIIlilQ Ihlk lll'rllll.I. Ihc llpCnllil.., ;llld ihl,,lil.,,., l l l ' r l l l l r l i l j l i t l ' ill ;ill lllC i'h'l Irit ull~ l i m l l l l l h ' l l val~ e,, Ill Itil' t I i l l I I;It illlV l i n d lll,,ll IIIc I~t'lhlriil;llltC ill Ihc ; l l l h n l i ; l l l l t ' l l l l l r l l l ,.,%Mi'lil ~,%~'lt' h',.Ji'd In llltlh 1'3,.,~',, i l l i l l l l i l l lid[ llillll,lll~.'t ,{, IAI'IL' litl%t'r%'l'l] 'The Ilnll' V ; l l l i l l l t l n ill Ihc i.iIl'311111v ill Ill.llllll li~'lHiln %tli{:ii Ihc ~%indlli!.,,, %~l'r~' ii;~l ch;ir!.,l'~l w;i,, tm';t,,I.II~'{I I~k Ihl' l l l l l l l l l l l l l l l , , h c l l l l l l i Ic%~'1 i i i t h l ; l l l l r ;lllil ,.,ll~l%%rl iii ['l,llll/e/till P r lllli Ihc 7r;idll'lil ill Ihl' ~,iill;lllllll ii Ii;i,., Ill'eli hll.ilill Ihlll hl';ll ll';ik;iL.,c Irlirli l i l t ',i.lll~lllli~lllil_.,', i,, UII %%' w h l t h i,, lll''311~ lilt' '.,;llilc' ll'.., lll;ll ,11 ]-{i,,hill~i Conclusions

Lh',,,q,il ,,,IHdt¢.,,, a n d l l c r h n t l t ; l l i C t ' I~',,,I,,,,~d ;i I I~'llllhldl7 I~ I w ',Lll'~¢rL'~Hldl.l¢lll~l~ 11"l'31.~lh=l I(ll Ihc IIl',,c !J~'lh'l;llIH Ill Iht' I I I I I I t h.,,cll ~'~h' It|HI-) I,irdfl', ~ ' r t ' ~'lmdi. h'lt I-¢l't',m,,,r ItlC Wllil.tilil#, Lilt' '..,i'll~lr;lll'i.I. ,i ,.,llUClllrC w;p, ih'l'dl'll ht'll~t'l~li Ihc ~llnlJln!7'~ ~ t i l t l i Cllllld wllli,,l'31id Ihl' ; i l l r i i t live lli_ldV hilct' w l l h l l u l ulhlwili!:, ,,llJllillt'3lil hl';ll Iclik;IQC ,_%llch ,I ,,UlIpi_irlllll.., ,.,Irllt'lill,' ~,i'.., ih',.,lt.,iil'll 1'31~lll'3h'd ;ilill i'~l~¢llniClil,lll% I¢,dcll hi lili'l'l ;111 IIic ,lllli%t' ll'i.llllll' llll'lllh In Ihl' llr'rhlrlll'3rll'( ' h"q'., Ihc Wlrldlli!J'.., ~t erl.' L h,~r!..,cd up h~ llll' 1'311"l] l ' l l r i c i l l h'%rl %~illilml ;irP, i~rcni'31LIIC quent'hlli)~. '3li{J Ilh-' L'~pirinll'lll'31 IC,,Ull,., '3L,rccd 1'3triv ~ e l l viHh Ihc tlHnlirit'311~,, p r e d t c h ' d rc'..,ull,., I)urllil.s ch'3rlJln)j ill llle WlrhJlll~Jh ill{' cl'lL't'l', ~il nlul~rll'llt' I]chJ tin Ihl' d l l l c n . m l i'lllllllilllenl~, ill Ih¢ P U l l I Ih~" nl¢'3,.,urliiQ ill!.flrl.llrl¢lll,., IIw t'leclricall~' t l l r l l l l l l l t ' l J valvc,, a n d lti¢ '311hlll-1'311t' t ' l m l r l l l ,i~,,..,h'rll I%('rc c h e c k e d N l l r r l i l i l i~t'rhlrirl'311ct-~ ~,~.t'r(' lil~,,,~'r~.'t'll Iiir ,JII ill Ihl'lli Acknowledgements

['he al.llllltr,, ~,q nJld Itkc I~l I~av Itwlr Ihallk,., hi IlK' inl'lnl~¢r,, In lilt' lJl.~'~l[.1,11,~.~chlr ,illd lilt" ~l_lrk'~lllllt ill l u ' , i l l h l l (.'ill pill'3111111 Illl Ihelr c'llllll'lhlllllll-lk ill h't'llnlt''31 v#,lll'lll,~t: d l l d h~r IIletr ~,'41111"11-I;111(111 dHrlnI.J ~'l)ll~ilrl.l~,'lll)ll ill Ihc mul)rlel References

I J

,~hiodii, b ~'1 ,d JOdl ,bl'ml,~mml ml ,'p?~memm,,: ,t~p,,, t~ .! MttlJ IlqlX?1 t~ "~ I Hlileh, A I%/I, #.lit, .J. and Bet.llev, I, i, I Jl',.l:emr ~ I Iq7H) III t~/

Nllb H, mdhoo/~ ml IlidJl,'tllll~

IoI

Nallqlll;.ll BIIrCiJU ill ShJnddrd,, (Iq/7)

Cryogenics

'1985

~ltll,'tlIllldlll'llll,t

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Vcll 2 5 S e p l e m b e r

491