c.'' - - • -'< '. . .'., 5.' - lss.fnal.govlss.fnal.gov/archive/other/mura/MURA-006.pdf · 18 the lab energy of the 1ncid81ltquanta . 1ti. units of proton rest maSReso . These two

LWJ-LJL CONFERENOE f1ACS

~ t f)ttheBeallbl1ltJ ota gt ~igt gtlroulaP~o~rQn Accelerator

j_ bull__ bull ~middot ~ bullbullclc80n ilaalett 2 1953~w JcmetI aM SIP __ y~- c - - bull -lt

~o~r~-~~~ conslderatlon glyen to the applloation of stro~_ c~~M ~J ~Je ~leratQr ~~ bullbullbullbull lgteen gt111~a to proton - -~~ middoti~otons are bullmiddot~middot bullbull ~_lthe mosc bullyersatlle too18 middottt~t_Ltery hlgh ~~tiJteraotlonslfseveral multl-B~~~ to be bU1Itlt~1ght bedeslrableto haYe one oapab1$ofi tinp electronssnll producing ~mfT18 raya Among thf) rea~middot_- h s maohine ml~tbe the relatIve theoret~cal 81IDpll0~~ii11zingphoto meson experiments the_ poRslblr~ty or~1~11~n scatteriJIg from nucleons and the posSllgtJe ~lt fnuCleon pairs AlthOllph Panofsky i8 cons Ideri~tb prUondingthellnear aooelerator pr1noIp1e inta t~lt L ~ bull there has bIMm general pessimIsm d)outthePJa bull ~ltl-BeY oircular electron Jnaoh1ne due to the o$Z1t81aOOCfI tlon radiation 108s 0

bull Ileof the present preliminary study is to demonshysttate1ltat iia oircular eleCltron aooelerator appearRin taot

Practl~l 5 an electron ener of lO~ Bey u81~ eXIRt~ RoF tUbes at tiye power rati~sand comrenient frequen-oles bull

The0tdJ-lt_icee between an eleotron maohineand protonmaoh1ne of abO-t~middott~ enerpy are tlle R F and in jection system It bli8~JlcmiddotUiIeoutithatby DlOd1fY~ or addi~ 80me RI oaYlties aJllllt~4-1ttrent1njectoran eleotron machIne such 8$ herein dis ~4 be used for protons or vice versa0T

~~fgt~oonslder1ng a maohnein tetall a few peneralltfacts8 - ~middotmiddot~V18tffHi9 The BlOst ~e~al use of any very hlghentrgymaMl r18 ~()~ucepartlo1es therefore the energy available 111 t~ero1II8ss system (considering a proton target)middot and not In the lablEl~ figure of interest

F()r prCgttoftson protons

pounde~= le +fEIoItamp)-t -2shywhereEbull Cbullmiddot bull aJi4 E1ab arem the kinetic energies avAilable in the centerof mSEl88ysteJB and 1n the lab in unIts of proton rest massea re speotlvely

FQr photons on protons

EC M

== JE~ +)Ja - Ibull

Where By 18 the lab energy of the 1ncid81ltquanta 1ti units of proton rest maSReso

These two express10ns are plotted f1~e 1 for lab energIes to 100 Bev

~- -2bull i --~

~~~lclnitIl808Jj~~OftAa8sgt1$tem 1 s i~t()1lI)tb18re~i55 leV111 the lab

12~~A 10 _ electronmaoh1ne v prt)~Jloh1ne1n the oenter o~ mass

~ma8s eJ18 or 6 BeyA50 Bev proton oenter OtlltBssa1d a 100 BeT machine gives 11 0 8

~~1Df1011P1edlsousseo1le1ow where B ax bull 6800 ~USEl anlt H~~t~theener~ lOBsper turn 1s 2f megavolts at the end

gt~Cti11u8tJUttthe 1e~slbi1it7 of a 10 5Bev c1rcu1arf1~ctron middotmiddotyenrthetol1()W1Dg numbera have been worked out Ttteidetershy (1ramet~Rar~ltthe rrequenoy and power l1miteof th~ RF

tUy bullbull ~ ~eror ap stat10ns comparable to the number oonshysla~middotSn~c~s prQtonaocelerator des1gns

p~ RI ~la~JNf$ fJl~~~enerR1 ~ bull 100S Bevmiddot ~_~lder1e1d B 6 0 8 ~uss

ortittN41U8 of curvature fa i~94 ~rA

JWIlberor~tt1~llht sections ~2 =-__ ~42lUmber oflllaooelerators -1

length of flJtratlaquoht seotions PI

1 == t 91~ meters feet

frequeno1ot tQtat1on == 1 X 1010 a 0 785 Ytcs~O

21l x~ bull14x10 + 64x91 ~

~gt- ~laquo- --gtshy

eh~iM~un ~~tlel4 T = 15 mill1seconds gt bull E ~t 1n380tl~tllJPj ) ~= 892Myen4urn

tltrnsuppljd~91ectrons e+~lfemiddot2l M~urn

t~~tr~selJllrle otlf=euroi 17 M~VJTVmiddot ~3~ I

DUs Ee = tgJj MJtvlr~ Ii =611 J- rD 3 Mc-Asc ~ 516 ~

or Hhumbatron cavity

d =70 0 cm ell1 ~ gap Vd 1~9 KVOtIIus b bull l01 ~ am

a a 38 cm 2Z= 84 om

~ = 37000 (iIaJgte~ce middotM~ I 0 04 melio1nnsIi

v ~tedbull middot per oavltr pAJL P = 0 23 M~~_ ptl1~ e ROA 3~2

bull ~~ Jow8t- Ptmiddot 3P Pt 714middotMW

~Fa4YITIES 1012eleO1~lt~~~l$emiddot 101 -8 electrons

C~PILi~i 16 x 10 1 0 6 x 10-7 coulQmbs cur~ttnt(Jmiddot 0126 126 ampeles

p~~ middotmiddots PL=lLbull 0122 122 M~AVTrt o l~bull middot ptr cav1t ~

Tftu8Obull~Q~~readll7 reta~ tnJctampblcOJltrol of the R in tharampoeritmiddota10middot]JelectJ()Jl101laThe mauawa beam pulses 1n eX18t~leo~Jt_qJlea are loti electroDs per pulse

1II~s~u)IJ()S ~~~~ilImiddot ~_~lt~~~~~~j~

i

r~Jf 1pound(()JJp5

AI =5 3 TIJRNS

AR =I S eAtl

~terall Cavltle8~~q7ele=Pfr = 116 Kl1o1oules ~ WCle aSSUmllW $0QSC111tlto~~~f1~le~~ bull ImiddotJ~ K11010Ul eS

2ia ton rls1ng (oont1m1ousJ II lt16sefondt 1)c~C~~er latora- 21 x 16 = 0 7 me~W8tts ~~tOr8~O~ Kilojoulea at 810 per KV = ~JOPilO

~~1t~deJB()t1 the R F power to match th~ vOltsgt~r tu~ required b Panomiddot 14 reduce theaboYe f1gure by about 8 factor of

Jhl-ee~

MAG_fPW~~ITS

6 om x 10om~~gap

-0ora c -= 211x 514 xIO x 60 cm3 ~_fl4 ~ ~P EfJIK=03 56 megaj~~les Epeak = ri KIO

d middot8ft 4~ltE =- 071 me~joule8 GoT~ O 11a1ttfQJ) otJL~ S gtepl amount of leakage nux)

S~80ltexcltatlonatl6cps tU = lO~ rad1ans JgtEt1t seoond - - - - voltmiddotmiddot bull tttective = E(A) VA = 15 x 106 vo1tamper-es

bull1tJbull~ eb$ermiddot llamiddotnmiddotkbullbullmiddotmiddotmiddota t1 0 perKYIt = $750000 l0ft- cod_eel banta Q == 100

~tl0nltas middotpresent B1Z1shy 0 middottrOD8 lUld bltatrol1s) Y4 _~r supp11bullbullb7 power souroemiddot ~ p x 7~0 kilowatts

totalJ)OwerdalXl BIibullbull 7 megawatts magna = OelS t total 4 ampt I

total oost of co_aneer banks to stflreeMrgy HP t 25QOOO bull ma~ 150000

totall 000 000

In the tl$42t1on of ex1st1J1g eleotron maohines we have assnmed an AC magnet 1J)alyen-lJOmmt 01t-oult w1th a condenser bank Since

energy galn peltumdue to ~leldr8te of r1se 1s small here oompared to radiation 10S8 ~turn a 8t8r rate 01 r1se andh1ph repet1tionrata can be bad 1dthM addelt1 R~ 11bull oolt The l11gher beam rate of 10 electrons per Il1Mte (aBsum1Dp 10 electrons per pulse) m~ht be ~slrable naome ~t-1meDts

modulat1on tlfmiddotillitve oirOt11ar eleotron ~ehlne gt10joules store4enelg for the R R

i ofphasl~ thellbull p oaltlei jJSUoh a proposed pt-oblem to oQ)igc1er The~J~ation lJadyeni~1On

Its and lsproduced arolm49ledOltkt at altI1e bullbull A sUJDmB17ofsome teQlm~~lavantapes of an1 a protonlllBol1ine might bemiddotlleJ1ted o i4 fr~q~~Jiey JP 1s reqUlle4 the 1njectlon~e~eien fr~m

r~8above thetran81t1on ene~ and the bremsstrahlung rons oomes OU$of the lIIachlne W~th an extremely

oe so that t_exper1aenta1 areaoouldbe le distance n-olltnemaehne Pulsed eleotron

e in use so that beams ofgthigher intensitylne are poss1ble

1n~l large oo1141J1g overhead and mapnet oosts 1t 8~~tbatan QlDlach1neotmiddotlO bull5 Bev oou d be built for a cost OMrblet(Japroton al1fi1e of the same oenter-or-mass ~ bullbull middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot~lU8middot 1s not a limit teohnically or economioally fOor oJ middote~bulljllaChinesbullbull US1J)g more cav1ties more tubes per o (l~ ~les as h1lth as 15 or 20 Bev mlpht be oonsideredo

middotmiddotcmiddotmiddotDmiddot

middot 80 70 t---------~

60

50 ~~---+----+---~c

~ ltl ~ ~~~ p----r-------t-~+____--_+_-~_+_--O_+_ ~ ~

~

l 1----+-1-1----+-----+---- FIGURE 1 ---41 I

I

1 i i

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