Keyword: injection
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MO2C3 Status and Perspective of Electron Cyclotron Resonance Based Charge Breeders ECR, plasma, electron, ECRIS 6
 
  • J. Angot, M.A. Baylac, M. Migliore, T. Thuillier
    LPSC, Grenoble Cedex, France
  • O.A. Tarvainen
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  
  Since their in­ven­tion in the late 1990s, Elec­tron Cy­clotron Res­o­nance (ECR) based Charge Breed­ers (CB) have been used in sev­eral Iso­tope Sep­a­ra­tion On Line (ISOL) fa­cil­i­ties to study ra­dioac­tive ions. Many de­vel­op­ments were car­ried out on these de­vices to en­hance their per­for­mances and im­prove the knowl­edge on the ECR charge breed­ing process in lab­o­ra­to­ries world­wide. At LPSC, re­cent ex­per­i­ments in pulse mode were car­ried out to es­ti­mate plasma pa­ra­me­ters such as the ion­i­sa­tion, charge ex­change and con­fine­ment times, pro­vid­ing in­di­ca­tions on the high charge state ions con­fine­ment. A new model of the 1+ beam cap­ture was also pro­posed and ex­per­i­men­tally ver­i­fied by study­ing the stop­ping of in­jected ions of dif­fer­ent masses. Pre­sent ECR charge breeder op­ti­mum ef­fi­cien­cies vary from 10 to 20% de­pend­ing on the ion species and the fa­cil­i­ties spec­i­fi­ca­tions. The total ef­fi­ciency ranges from 35 to 90% and the charge breed­ing time from 10 to 25 ms/q. Elec­tron Beam Ion Source (EBIS) is an al­ter­nate CB tech­nol­ogy with lower con­t­a­m­i­na­tion yield, yet lim­ited in­jec­tion flux ca­pa­bil­ity. ECR CB sus­tains a higher 1+ beam in­ten­sity ac­cep­tance and its prospects to im­prove the ef­fi­ciency, charge breed­ing time and beam pu­rity are iden­ti­fied.  
slides icon Slides MO2C3 [1.969 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-MO2C3  
About • Received ※ 21 June 2022 — Revised ※ 30 June 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022
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TU3C3 Preparation of Low-Energy Heavy Ion Beams in a Compact Linear Accelerator/Decelerator experiment, electron, rfq, ion-source 63
 
  • Z. Andelkovic, S. Fedotova, W. Geithner, P. Gerhard, F. Herfurth, I. Kraus, M.T. Maier, A. Reiter, G. Vorobyev
    GSI, Darmstadt, Germany
  • N.S. Stallkamp
    IKF, Frankfurt am Main, Germany
  
  High pre­ci­sion tests of fun­da­men­tal the­o­ries can often un­fold their full po­ten­tial only by using highly charged ions (HCI) at very low en­er­gies. Al­though in light of the en­vis­aged en­er­gies at FAIR, ex­per­i­ments in the keV to MeV range may sound like backpedal­ing, these two tech­niques are in fact com­ple­men­tary, since the pro­duc­tion of heavy HCI is vir­tu­ally im­pos­si­ble with­out prior ac­cel­er­a­tion and elec­tron strip­ping. How­ever, sub­se­quent prepa­ra­tion, trans­port, stor­age and de­tec­tion of low-en­ergy HCI bring new, sur­pris­ing sets of prob­lems and lim­i­ta­tions. Here we will give an overview of the CRYRING@​ESR local in­jec­tor and the HI­TRAP lin­ear de­cel­er­a­tor. These two fa­cil­i­ties con­sist out of one or two ac­cel­er­a­tor or de­cel­er­a­tor stages, with a total length of around 10 me­ters, mak­ing them "com­pact" in com­par­i­son to other GSI ac­cel­er­a­tors. The fol­low­ing sec­tions de­scribe their main de­sign pa­ra­me­ters, the achieved ion num­bers, chal­lenges of beam de­tec­tion, as well as some spe­cial fea­tures such as multi-turn in­jec­tion and sin­gle-shot en­ergy an­a­lyz­ers. The con­clu­sion will pre­sent the cur­rent sta­tus and will also give an out­look of the planned ap­pli­ca­tions of low-en­ergy ions at the FAIR fa­cil­ity.  
slides icon Slides TU3C3 [3.244 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TU3C3  
About • Received ※ 20 June 2022 — Revised ※ 01 July 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022
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TUP14 Study of Injection Line of the Cyclotrons C70XP of Arronax emittance, cyclotron, quadrupole, experiment 100
 
  • T. Durand, R. Bellamy, C. Castel, F. Haddad, C. Koumeir, F. Poirier, H. Trichet
    Cyclotron ARRONAX, Saint-Herblain, France
  • T. Adam, P.G. Graehling, M. Heine, C. Maazouzi, F.R. Osswald
    IPHC, Strasbourg Cedex 2, France
  • F. Haddad
    SUBATECH, Nantes, France
  
  Funding: Work supported by grants from the French National Agency for Research, Arronax-Plus n°ANR-11-EQPX-0004, IRON n°ANR-11-LABX-18-01 and Next n°ANR-16-IDE-0007 and PhD scholarship from the IN2P3/CNRS.
The cy­clotron C70XP is an ac­cel­er­a­tor built for the pro­duc­tion of non-con­ven­tional ra­dionu­clides for nu­clear med­i­cine, re­search in physics, ra­dio-chem­istry and bi­ol­ogy. Its in­jec­tion sec­tion has been de­signed for 4 types of ions (HH+, D-, He2+ & H−), 3 types of ions reach the end of the beam­line (H+, He2+ & D+) at the max­i­mum en­ergy of 70 MeV (H− & He2+). It is im­por­tant that reg­u­lar and stan­dard runs pro­vide sim­i­lar beam fea­tures with a good emit­tance qual­ity. An in­ves­ti­ga­tion, fo­cused on the beam in the in­jec­tion, cover beam mea­sure­ments and po­ten­tial beam geom­e­try con­straints. The beam trans­verse char­ac­ter­is­tics in the in­jec­tion line has been stud­ied with an Al­li­son-type emit­tance meter and a sim­ple in­stru­mented col­li­ma­tor in­stalled in­side the in­jec­tion line *. With these 2 de­vices, it is scru­ti­nized how the beam emit­tance evolves as a func­tion of set­tings of the in­jec­tion mag­nets and the source pa­ra­me­ters **. De­pen­den­cies found be­tween the emit­tance, beam hotspots and tun­ings are dis­cussed, as well as the pro­tec­tion per­formed by the col­li­ma­tor. Fu­ture of this work with a po­ten­tial col­li­ma­tor de­sign is in­tro­duced.
*F.Poirier and al., ’The Injection and Chopper-Based System at Arronax C70XP Cyclotron’
**F. Poirier and al., ’Installation, Use and Follow-Up of an Emittance-Meter at the Arronax Cyclotron 70XP’ 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP14  
About • Received ※ 21 June 2022 — Revised ※ 27 June 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)