Advances in the helium-jet coupled on-line mass separator RAMA. [Recoil Atom Mass Analyzer]

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1、Contribu£ioa»tothe10thInternationalConferenceonElectromagneticIsotopeSeparators,Sept1-5,1980.SubmittedtoNuclearInstrumentsandMethods.BNL-28301-DISCLAIMER.Thisboot,watpreparedata«accountofworksponsoredbyanagencyollh

2、UnitedStalesGovernment.NeitherlhaUnitedSlitwGovernmentnoranyagencythereof,noranyolt

3、hiiremDloyeej,make*anyvwriiinly,expresiorimp'W.oriiumet*nytopiliabilityoirwpomibilitv(ortheaccuracy.compleieneH.orutelulnt*olanyinformation,apparatusproduct,orprocet*disclosed,orrepresentsthatittuwwouldnotmlringsprivatelyowrwdtightvReferencehereinloanyspecificcommercialproduct,procau,orservicebytr

4、adenirm.trademark,manufacturer,orotherwise,doeinotnecessarilyconitltuttorimplyinendowment,recommendition,orfavoringbytheUnitedStatesGovernmentoranyagencyItweol.Trwviamandoplnlomofauihoriaxprtuedhereindonotneceoarlly%morreflectiho-toltheUnitedStainGovernmentoranyagencythereof.ADVANCESINTHEHELIUM-J

5、ETCOUPLEDON-LINEMASSSEPARATORRAMA*mmD.M.Moltz+,j.Xysto++,M.D.Cable,R.P.Parry,P.S.Haustein+++,J.M.WoutersandJosephCernyDepartmentofChemistryandLawrenceBerkeleyLaboratoryUniversityofCalifornia,Berkeley,California94720ABSTRACT;Generalimprovementstotheon-linemassseparatorRAMAhaveyieldedagreaterreliabi

6、lityandefficiencyforsomeelements.Anewutilitarianhelium-jetchamberhasbeeninstalledtofacilitatequicktargetanddegraderfoilchangesinadditiontoanewionsourceholder.Ahigherefficiencyhollow-cathode,cathode-extrac-tionionsour,ce.forlowermeltingpointelements{<1200*C)hasalsobeendesigned.Testswiththebeta-dela

7、yedprotonemitter3Cashowedafactoroffiveincreaseinyieldovertheoldhol,low-cathode,anode-extractionsource.Adifferentially-pumped'tapedrivesystemcompatiblewithbothy-Yand0-Yexperimentshasbeenincorporatedintothegeneraldetectionsystem.Allmajoroperatingparameterswillsoonbemonitoredbyacompletestand-alonemic

8、ro-processorsystemwhichwilleventuallybeupgradedtoaclosed-loopcontrolsystem.I.INTRODUCTIONTheversatilityofthehelium-jetcoupledmassseparatorRAMA(RecoilAtomMassAnalyzer),placedon-linetothe88-inchcyclo-tronoftheLawre