• H.-A. Synal
  ETH/Ion Beam Physics Laboratory, Zürich

Ac­cel­er­a­tor Mass Spec­trom­e­try (AMS) pro­vides in­stru­men­ta­tion orig­i­nal­ly de­vel­oped by nu­cle­ar physi­cists more than 30 years ago to mea­sure long lived cos­mo­genic ra­dionu­clides such as ¹⁰Be, ¹⁴C, ²⁶Al, ³⁶Cl, ⁴¹Ca, ¹²⁹I, U, Pu and Pa at nat­u­ral lev­els. In the past ten years im­pres­sive progress in the mea­sure­ment tech­nique has been made and with the ap­pear­ance of com­pact low en­er­gy ra­dio­car­bon AMS sys­tems, a new cat­e­go­ry of AMS in­stru­ments has been in­tro­duced. This has re­sult­ed in a boom of new AMS fa­cil­i­ties with more than 20 new in­stal­la­tions over the last five years. But low en­er­gy AMS is not lim­it­ed to ra­dio­car­bon only and there is a great po­ten­tial for ¹⁰Be, ²⁶Al, ¹²⁹I and ac­tinides mea­sure­ments at com­pact AMS sys­tems. The lat­est de­vel­op­ments to­wards the low en­er­gy limit of AMS re­sult­ed in two new types of sys­tems, the NEC Sin­gle Stage AMS (SSAMS) and ETH mini car­bon dat­ing sys­tem (MI­CADAS) op­er­at­ing with ter­mi­nal volt­ages of about 200 kV only. In ad­di­tion, sys­tems like the HVEE 1 MV Tande­tron or the com­pact ETH 600 kV sys­tem are ca­pa­ble to ex­tent the range of ap­pli­ca­tions at com­pact sys­tems be­yond ra­dio­car­bon. These sys­tems will have enor­mous im­pact, not only on the use of AMS in biomed­i­cal re­search and on ra­dio­car­bon dat­ing but also for re­search ap­pli­ca­tions with ¹⁰Be, ²⁶Al, ¹²⁹I and ac­tinides.

Slides

• R.C. Vondrasek, J. Carr, R.C. Pardo, R. Scott
  ANL, Argonne

Funding: Work supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357.

The con­struc­tion of the Cal­i­forni­um Rare Ion Breed­er Up­grade (CARIBU), a new ra­dioac­tive beam fa­cil­i­ty for the Ar­gonne Tan­dem Linac Ac­cel­er­a­tor Sys­tem (ATLAS), is near­ing com­ple­tion. The fa­cil­i­ty will use fis­sion frag­ments from a 1 Ci ²⁵²Cf source; ther­mal­ized and col­lect­ed into a low-en­er­gy par­ti­cle beam by a he­li­um gas catch­er. In order to reac­cel­er­ate these beams, the ex­ist­ing ATLAS ECR1 ion source was re­designed to func­tion as an ECR charge breed­er. The he­li­um gas catch­er sys­tem and the charge breed­er are lo­cat­ed on sep­a­rate high volt­age plat­forms. An ad­di­tion­al high volt­age plat­form was con­struct­ed to ac­com­mo­date a low charge state sta­ble beam source for charge breed­ing de­vel­op­ment work. Thus far the charge breed­er has been test­ed with sta­ble beams of ru­bid­i­um and ce­sium achiev­ing charge breed­ing ef­fi­cien­cies of 5.2% into ⁸⁵Rb¹⁷⁺ and 2.9% into ¹³³Cs²⁰⁺.

Slides

• D. Kanjilal
  IUAC, New Delhi

A 15 UD Pel­letron elec­tro­stat­ic ac­cel­er­a­tor is in reg­u­lar op­er­a­tion at In­ter-Uni­ver­si­ty Ac­cel­er­a­tor Cen­ter (IUAC). It has been pro­vid­ing var­i­ous ion beams in the en­er­gy range from a few tens of MeV to 270MeV for sched­uled ex­per­i­ments. A su­per­con­duct­ing linac boost­er mod­ule hav­ing eight nio­bi­um quar­ter wave res­onators has been made op­er­a­tional for boost­ing the en­er­gy of the heavy ion beams from the Pel­letron for ex­per­i­ments at high­er en­er­gies. A new type of high tem­per­a­ture su­per­con­duct­ing elec­tron cy­clotron res­o­nance ion source (HTS-ECRIS) was de­signed, fab­ri­cat­ed and in­stalled. It is in reg­u­lar op­er­a­tion as a part of an al­ter­nate high cur­rent in­jec­tor (HCI) sys­tem being de­vel­oped for in­jec­tion of high­ly charged ions hav­ing high­er beam cur­rent in to the su­per­con­duct­ing linac. A radio fre­quen­cy quadrupole (RFQ) ac­cel­er­a­tor is being de­vel­oped to ac­cel­er­ate high­ly charged par­ti­cles (A/Q ~ 6) to an en­er­gy of 180 keV/A. The beam will then be ac­cel­er­at­ed fur­ther by drift tube linacs (DTLs) to the re­quired ve­loc­i­ty for in­jec­tion of the beams to the linac boost­er. De­tails of var­i­ous de­vel­op­men­tal ac­tiv­i­ties re­lat­ed to the heavy ion ac­cel­er­a­tors and as­so­ci­at­ed sys­tems are re­port­ed.

Slides

• A. Galatà, L. Bertazzo, L. Boscagli, S. Contran, A. Dainese, A. Facco, A. Lombardi, D. Maniero, M. Poggi, M. Sattin, F. Scarpa
  INFN/LNL, Legnaro
• T. Kulevoy
  ITEP, Moscow

The pos­i­tive ion in­jec­tor for the PI­AVE-ALPI com­plex con­sists of an ECR ion source placed on a high volt­age plat­form. A 14.4 GHz ECRIS named Alice, de­signed and con­struct­ed at LNL in the early &##8216;90, re­li­ably de­liv­ered gaseous beams to the Su­per­con­duct­ing RFQ PIAVE for nu­cle­ar physics ex­per­i­ments until 2008. The re­quests for heavy ion beams of in­creased cur­rent and en­er­gy, need­ed to per­form the ex­per­i­ments planned for the next years with the AGATA demon­stra­tor, prompt­ed us to up­grade our in­jec­tor with a new ECR source ca­pa­ble of high­er out­put beam cur­rents and high­er charge states. This ac­tiv­i­ty start­ed in 2008 and was com­plet­ed at the be­gin­ning of 2009. A 14.5 GHz, SU­PER­NANOGAN type ECRIS built by Pan­tech­nik, was in­stalled in our re­fur­bished high volt­age plat­form in July 2008. The space avail­able for main­te­nance in the plat­form was in­creased and a new lead shield­ing for X-rays has been set up. The water cool­ing cir­cuits have been re­designed to de­liv­er dif­fer­ent flux­es and inlet pres­sures to the equip­ment mount­ed on the plat­form (plas­ma cham­ber, ex­trac­tion elec­trodes, bend­ing dipole and power sup­ply). A new safe­ty sys­tem has been im­ple­ment­ed in order to cope with new and more de­mand­ing safe­ty rules. A lot of at­ten­tion has been paid to the op­ti­mi­sa­tion of the in­jec­tion line with new di­ag­nos­tic de­vices for beam char­ac­ter­i­sa­tion (mov­able slits, emit­tance mea­sure­ment tools). Com­mis­sion­ing of the new source and in­jec­tor with beams has start­ed and first re­sults will be re­port­ed.

• L. Perrot
  IPNO/IN2P3/CNRS, Orsay
• S. Grévy, C. Houarner, R. Hue, C. Marry
  GANIL, Caen
• S.M. Lukyanov, Yu. Penionzhkevich
  JINR, Dubna

Physics that mo­ti­vat­ed the build­ing of the LISE mag­net­ic spec­trom­e­ter, main ideas ex­posed in the sci­en­tif­ic coun­cil of GANIL June 4th 1981 by M. Brian and M. Fleury, were: atom­ic physics stud­ies with stripped ions and the study of new iso­topes pro­duced by the frag­men­ta­tion of beams. The LISE line is a dou­bly achro­mat­ic spec­trom­e­ter (angle and po­si­tion), with a res­o­lu­tion bet­ter than 10^-3. Since the first ex­per­i­ment done in 1984, sev­er­al im­prove­ments of the spec­trom­e­ter were per­formed: use of a achro­mat­ic de­grad­er (1987, used for the first time in the world), build­ing of the achro­mat­ic de­vi­a­tion and the Wien Fil­ter (1990), build­ing of a new se­lec­tion dipole and as­so­ci­at­ed ver­ti­cal plat­form (1994), build­ing of the new LISE2000 line (2001), use of the CAVIAR de­tec­tor (2002), build­ing of the CLIM tar­get (2007). De­spite an ex­treme in­ter­na­tion­al com­pe­ti­tion, the LISE spec­trom­e­ter re­mains a world-lead­er equip­ment using more than 50 % and up to 90 % of the beam time avail­able at GANIL. This paper pre­sents the sta­tus of CAVIAR de­tec­tor which con­sists of a MWPC ded­i­cat­ed to in flight par­ti­cle po­si­tion at the first dis­per­sive plane of LISE. Since two years, in­ten­sive ef­forts were done with the ob­jec­tive to make avail­able a “plug and play” de­tec­tor for nu­cle­ar physic ex­per­i­ment. We will de­scribe the sys­tem from MWPC up to ac­qui­si­tion sys­tem. As ex­am­ple few ex­per­i­men­tal re­sults will be pre­sent­ed.