Unguarded cryostat for thermal conductivity measurements of multilayer insulations

Unguarded cryostat for thermal conductivity measurements of multilayer insulations

Research and technical notes II ¢~ k.A in IhL' Ir;Jn,,h~rmcr Zrh.llJIl¢li~. 1lead. ~ l l l l the (1111' l u r l l ;,¢~.ondJr3 ~i[ldli¿l.-', curlr'fzl'...

126KB Sizes 2 Downloads 35 Views

Research and technical notes II ¢~ k.A in IhL' Ir;Jn,,h~rmcr Zrh.llJIl¢li~. 1lead. ~ l l l l the (1111' l u r l l ;,¢~.ondJr3 ~i[ldli¿l.-', curlr'fzl'~ Ll]~ II~ [~,~ k A v,'¢l~' rca~.h~'d Thl' I X ( ) A lUmhJV~ I~w~'r ',upI4~ z', ,,ulll¢lClll h~ rnalnhJll~ ~.'Lirrcnl,, ~1 := 12 kA h~r ' I~)() ,, 1 tw I~'cd hau'k h.q'~ rllVIIIll111¢¢[ ,jbqIV~' |'~ IIIICIHIu'd I(~

II I{.)

pr~vld~.' a nl~ru' ',,L.'FI'.~IIIVC !~ilt~l~l~.' ~dl;U.'~' (J~'l~'ll~l~

'.-t

~,"llh LI

[,Ivci~ cxl~'lrl;Jl l i c h l d ~.(HI,d,.llll ~IIIFCIII III Ihv' ',,~rnlfl,' l'(lllL',.,['~l)ll(Jllll~ il~ ;I Cllll'.,I,IIII '.,;.lltild<' ','4dl;ll.-'c ~';111 i'~' n l a l n l ; t l l l c d d~',,pllt' Ih¢ ~.'uirr~.'l|l dc~.'Jy Iim~.' ~'l ii|,;luril, l hui~,. n ,.,1~ bill %('I¿',III%'C v~dl;ltzc , l l l l p l l l l c r ~;lli llu ; i i ~ p l l c d ] ih'

H

~'llrr~'lll- %qlil~ll~l' ~ li,lr;i~'h.'rl,.dl~ ,.~ ~ ;ll1 I~(' r~'~ c~l~l~'~l ,.,~'h'~ III1[.,

7

,,un~-' , , , i m p h ' ~41,,!.,c h'~¢l,, ,.,ub,.,cqllmlllv 'Tht,, m ~ , ] c ~1 ~l'~'r,Jll~)II I', I",IHH~'~II lli F/L~HI~' I Iii ,Iii4)lhci li1~uJc Ili¢' c x h ' r n u l IlchJ I', ,,~,',~'l~l. ;li|d ;11 ,n im,,,clm, l~'~l ,,;lllli)i{' vldl;l!J~' Icvul Ihc d l ' [ ' w r l d c i l l L' ~1 Ih¢ ~'I iIl{'~ll k'llfl{'lll l lll IIW CXI~'I II;11

C)

I:., i.

It~,~h", ~d~l,llnc~l I~r ,,h~vl ,,;~nlld,", ,d R u l h c r h u ~ l I~'l~C ~',zlde,, ,Ir,.',.,ll,~nl Ilill,t~ltH',4 nn~l~ l ~ ' ~ l l n l i ~ l l ~ l c l ; l l l ' . , , d IL'w h'~'d h,n~.k h . q ~ Ll~l~' U~'~'nl d~',,~'n~l~'~l ~'l:..'whcrv ~ ] lit' M'~.q)II~[;I~ ~.1111~'111 III~'~I~.,LII~'IIH'III I', ~.';llnl~r,Jh.'~l

(_I

4 3

L'

I I I

I 2

L

I

I

I

,3

4

5

F,

I 7

I k A ,,I;Jbilnz¢,l l , ~ w c r ; , u p p l ~ T h e nH~,,I ,,I.'ri~tl', ¢rrl~r i n l l ( i d l l c ~ q i Irll,~ ~.,Illill;IIHHI ;111~1 FII~UI'dlI~'IilCIII ~1 ',~'~.'qlll d,.Jr~,' ~.IF~ till I', ¢/IJL' h~ IIIl¢l'r;th~r d r i l l ] li~' h d ; t i c r i ~ r ~1 %Cl.~Hlddl"%' ~.1111CIII IIIL',1',11(~'111~'111 I',q'",llllI,Jf('(I h) h ' 4- 1 '~". I~)r ,J ~.lJrr~'lll i)l "~ I~_.~ ; l l l d ;I rl',~' Illllz' ~1 I()() ', [ h c crr~)r ill ~.'urrclH-V()llLl[.'c ~.'J|Jr,.IVl~rt'dlu ', IIl~.~;l'~url'ltl¢ rtl'~ i'.~ ' " ~ Thp., ;I('~.'UI;H.',, I'., ~'(HIIIIII|L'd bY l.'~llll[~;lrl,.,qlll Ill l.'rlll~.iJl ~.'IIII~'III

lll~',l,,.Ul~'lll~'l¿l',

V, llh

lhP,,

.il~IHtr;illl,~

I~

~hl~'~l

Muqulelu, I~eld (T) ;IIJIV~'III~'III v~Ilhlll 4- ~', Figure .5

DHl:H~l'idP'rll:e ' (~I ~ril.'al ~:urlPrll i~ri ITl.)!:Iri.~ll~,' llPh'l h~l

,.,ampl~, 4fl F/gu/e-, 4 E = I ,uV , : r n "

Acknowledgements the, '.,;iilil~i~' li~dd~r I', ,,II~%~.II |II r n ~ r c ~h'liill Ill l ' t q m , ' t II'.., hq~ I,., ".,~'l~;irah'~l Ir, illl llh' llliJll¿ [Hlrl I ~ l~.~,q~ v~c~ll..,c,., a n d )'l.lld~.'d I~, IV,,~ r~d,,, A I h ' r ' . , d d c r l n l , IhL' h~itl l ~ n ,.,II;ll'~(-d ,...1111])I¢ I~ lhl' IF,III",II)FTIiL'F '~('l'(lllddl"V %,¢llll[Irl)] lli~ - ,..,,IInph' I'.., '.,Iruu, hh.'l)~.'d l w Inv;iil,., ,~I l h c v,~.-dl.,c,, 'T~%,, IrJill,.,h)rllt~-r:., %~,'L'F~' bLiiII (111~" V, llh ;I I%~.(PIIIrll ~.~'~.'l)llCJ,Ii~' % l l | d l l l l J , l l l d ~llll- ~,~llli ()liC I I I I l l (ll ,~%'(Hid,lr\ ~,~.liiLJllll.' In hqdii ~ u'.,c', ~ ' u r w l i l dk'~.';l~' IlliiC ~'~ill~,l;llil ',, ,ll

Unguarded cryostat for thermal conductivity measurements of multilayer insulations

] [ H ' ,'IIlIiI,H", lii,'llik h,lr A l ~ a l l l ~ l l l n l,,r ('xpCrllliCl11,'J[ ,I'~',I',,I;IIIL~' ;It|d Mr,, ~,',lZ('lllll;I I,~r h~'ll~ III r ) r c l ~ a l l l q . , lie, p~Ipcl

References I .' l

(,lllant. %.V. and Brillon, X B /?,'r ,%1 I . ~ . . m (I'~'~) 41) ~.lu Nh,r,,hm. I...%. and i. nderle,n, (; lSd, h,l~h, t 1~V' (Iq~'4-') Z I~-,() E'rokh,n, ~. % , k u r ~ h e / . h ~' f' and ~lfir~hm, L ~ . ['.l, Ill, Ira II,~/,(l~),~;~l I IJI

Recewed 14 May 1985

A cryoslal

tor

measuremenls

c o n d u c l w , ly c)l m u l l i l a y e r s i m d a r Io I h o s e m n o r m a l has

been

msulal~ons

cunslrucled

ol

the eflecllve

Ihermal

msulalions ~n c o n d ~ l i o n s (',ryc)gen,(: hqu~d c o n l a m e r s Resulls Ior I w o mulldayer

are p r e s e n l e d .

T. H a t a c z e k a n d J. R a f a t o w i c z InslHule Ior Low Temperature and Slruclure Research, Pohsh Academy ol Sciences, 95 Pr0chmk Slreet, 53-529 Wrootaw, Poland ()()1 1 - 2 2 7 5 , 8 5 / ( ) 9 0 5 2 9 - 0 2 $(')L'I (.)() ,,_1 [ 9 8 5 BiJllerwcbrfh I'~ Co (Pubh,shef~,) Lit]

Keywords: cryogenics; cryostat; thermal conductivity; multilayer' insulation

Cryogen,cs

1985 Vol 25 September

529

Research and technical notes

V,+l.uum ,,auge~

q~.

r ~

Suppu~l dr, d

[

"'' "

Ij _ _ _ _ I

Outer ',hell

In

L

"~

"Jl

R e,+er Vq)lr

/ /

OiJler ',cruerl

Inne, ~(Ir 1311url p UiTip

It, pLIpern ~.'oilcer,lltnl, n i u l l i l a y e r ii,l~,Lilali
Experiments ()LIr nla,n i~Lirp()'~e ,n de~u,l,llnL., Ihe ~ ryt)slal wa,~ h) creale ~.'~lrldilili,iis hi,radar h) Ill,uSe ,il ,flair,hal use. 'Therehire Ih¢ I ' ~ IIqLlid nilrol?¢ll u'~irllaim'r made bv 'l~ru_)pan' wa;~ cl,~i.~en a.s a basIs ~il Ifºit' l.'r~'(i,,,laI de'.,l[J.rl No chanL..,es were made h_,lIIºl~.'~.'(HI'.,IFu~.'II~H1(d'lhe rc'ser~¢ilr ,.ind neck., bul hi Ihe Cil.ller lackel b$ addlrll:.,, I~¢i Ihlerm;.,[ ~creerl.s 'T'hle I'lrsL rruJd~.' ~)1 c~ipix.'r, e,,~.'los~.'.s Ihe re.,.,e~ol, ([t~_ttm' I) Thl¢ sc-~'~ind ,~c'rcen. made ol a l L l n l l n l l l l n , hanEU nl:2 Ir~,,in a IlarlE~e ~ti lhe nc~'lc, was mLlde denlliU,lllable B~ill, lhe ~iuh:r lack¢l u,id lhe re!.,erv~ilr were- made.' ()I .'.,lalnles.s :,I~.'L'I IYlie I H I N N g T T h e ~iul~.'r lackel wa.s ;,e,.,led wtlh mc'llll t;a,~kels c'~,Pper .~ rrltt, lhlick ,,r alurrli,l,iu,lr,l

Cryogenics

Resulls

Iri'..;ulalion Temperalurl-, Heal Ihic:krluss, rliHP.ren,;e, Ilux. I Al Q

El'leCllVP thermal ( un('luclivlly,

({:rri)

(K)

(roW)

A (rnW rn "i K"

Conwn Itonal MI

I 2

173

712

0207

Sell IDUrrlplrlg MI

()8

I 7:1

t:J~3

0 128

Copper ,,L:reerl

Figure 1 Sc,hPmdlnl: dtagram ol urlguarderl ,,ryokldl h)r ETC.C ITleaf~lJIP'lTlerll~i ()1 ITlulII lay~-r IrlNuIdlll.)n%

530

Table 1

I ~'''~" Neck

I I'lel ITI a I

ciJrlrle£ I iiirl

vacuurri,rlle,

1985

Vol 25

September

inn, llºlick The wl,(ile cn, o.slal ,,.'~)uhJ he healed lu lerriperulures m.'eded l'~)r ellecltve c~[tl[J,asstn[J. ~il lhe I,IsulalltIL~ ,irl,.,Ic'r t a I.~ A l l e r di.~,indnllln~J, lhe cahirt,lneler ll,e rriullt layer i,li.sulall, m was a p p l i e d Io all .su rl'ace.,,, ~I lhe c~ipper screen 'Tt,ertn~ic~iul~le,, were pr~wided h) ,l|,lea~ure lhv lerripera lure ~)1 IIºle tr,n,'r and ~Ltler screen.~ and Ihe l e m p e r a l u r e t.,radie,lll d o w n the ,neck II wa:.; p~is~ible h~ conlr~il Ihe c'llnll'),).~lll(m ~il residual L-'a', II1 Ihe c rye,sial by U,~I,I,I~, a u n i p o l e mass b i l e , Beh~re Itle '.;lurl ,~1 ca, t,i c x p e r l m e n l Ihe c a h i r l m e l ~ r v,a,, relllled h~ I1,¢ sanle s l a r l l n B level w l l h It,e cryol.enl~ I~qul(± Ihcn iln ,ale ~1 evap~irall~m wa,.; rrlca~ll red [=dd,' ] shows Ihe rc'.'.,ull'., ,il mea.'.,clrerrtenl.s (il Itp..F T ( C ~1 ii,l,dJlali(in ~.'(H,l.slilLtled Irlm,l II layers (il IO p.,in II, l~'kncss ~JhlnlinlUl,l,l hill and II)layer.~ ~1 .~pacern made()l l:.'la.~.~ leXlLire i~.rie ~'T' ~)(). c~mverili(inal r,iulhla~er m.~ula II~),IL ~ir L,lans paper h~aded w i l h 1) "~ nm m~,le~.ular sieve p~wder ,,ell pll,nl~[[,!, n i u ] l i laver in stilali~m ~

Conclusions 'T'he L.'r3,¢~.sla( dL'sL'rihed here ha.s been .su~.'ces.,dully te.~led ;J,l,ld has wcirkl.'d h_,ir se~,eial year,.; .SlmLiIlane~u~ly w l l h a I];11 i dale ~ al~)rlmeler T h e a~ curacy ol m e a s u r e m e n l ol Ihe E T ( ( Jn Ihe lln~Juarded c a h , r l n i e l e r in e,.;llmaied h) be _+ 2()",, I1~; m a i n a d v a n l a ~ e is Ihal Ihe E T L C mea~Lire,nie,l,l~ h~r dillere,ºll n,alerials are repealable and are k m iwn I Li,l,cLIo,n'.;, d vacuu rr, a r,ld let. peralu re T h e measu re,nl¢,lll,.. ~il LJas pres.~t.ire iriNidc Ihe ~.'ah~llmeler alh,lw Ihle I~[)linitzalili,1 ~il pLtmpiiºl£. IILil re~t,lne.~ h,lr d t l l e r e n l i,I,I.~Li laitcin ,haler tal.~

References I J

Ku~.',ner, Z.(; Tepl~m.,~j IZ,d,Jl',lyd ', h'l, hnlke 111tk'~l~li I¢'llll~L'r,tllJr ,'il, IJtlrl,~ll,wrll, r~l,,,,,t,~xD, I_I~_~R(I,t,~t~) KropsehoL, R.H..4Jr I' 'n',q,t E,/,t (1~+7(I) 16 lil,-I Halaezek T and Ral'o,lo~.l¢,z., J. (_in Ih,' II'l~=inl.,I i',)ndu,'ln%nl¥ ,d tl'w ,,~'11r~uriHbnru., mulll IJ~,'er ut,,uhJliqm hlrtl,.~mHnl., imp,.[ Halactek, I /'hi) r1~+~l~ IN TIBS PAN W r . r l a w P~dand tl~lNll