• D.C. Weisser
  ANU, Canberra

Elec­tro­stat­ic ac­cel­er­a­tor lab­o­ra­to­ries were the nurs­eries for the heavy ion physics re­search of today and the ac­cel­er­a­tors this re­search need­ed. The first con­fer­ence, of what has evolved into the HIAT se­ries, was the "In­ter­na­tion­al Con­fer­ence on the Tech­nol­o­gy of Elec­tro­stat­ic Ac­cel­er­a­tors" host­ed by the Dares­bury Lab­o­ra­to­ry in 1973. While some of the found­ing labs of this se­ries have ceased doing ac­cel­er­a­tor based physics, elec­tro­stat­ic ac­cel­er­a­tors still in­ject beams into pre­sent day heavy ion boost­ers. Elec­tro­stat­ic ac­cel­er­a­tors also con­tin­ue to pro­vide beams for nu­cle­ar and ap­plied physics in lab­o­ra­to­ries with and with­out boost­ers. The de­vel­op­ment of elec­tro­stat­ic ac­cel­er­a­tors re­mains ac­tive and will con­tin­ue in the next few years. The im­prove­ments have been spurred by in­jec­tion beam re­quire­ments of boost­ers as well as the spe­cial trans­mis­sion and sta­bil­i­ty needs of ac­cel­er­a­tor mass spec­trom­e­try. The sur­vey of the elec­tro­stat­ic ac­cel­er­a­tor com­mu­ni­ty pre­sent­ed here, has iden­ti­fied a broad range of im­prove­ments and uses as well as fu­ture tech­ni­cal di­rec­tions for elec­tro­stat­ic ac­cel­er­a­tors.

Slides

• S. Dobrescu, I. Branzan, C.V. Craciun, G. Dumitru, C. Florea, D. Ghita, G. Ion, G. Mihon, D. Moisa, D.V. Mosu, G. Naghel, C. Paun, S. Papureanu, T. Sava
  IFIN-HH, Magurele-Bucharest

The Bucharest FN Tan­dem Ac­cel­er­a­tor was put in op­er­a­tion in 1973 and up­grad­ed a first time in 1983 to 9 MV. In the pe­ri­od 2006-2009 a sec­ond pro­gram of the tan­dem up­grade was per­formed aim­ing to trans­form this ac­cel­er­a­tor in a mod­ern and ver­sa­tile fa­cil­i­ty for atom­ic and nu­cle­ar physics stud­ies as well as for dif­fer­ent ap­pli­ca­tions using ac­cel­er­at­ed ion beams. The up­grade was achieved by re­plac­ing the main com­po­nents of the tan­dem by new ones and by adding new com­po­nents. The old HVEC belt of the Van de Graaff gen­er­a­tor was re­placed by a "Pel­letron" sys­tem, the old in­clined field stain­less steel elec­trodes ac­cel­er­a­tor tubes were re­placed by ti­ta­ni­um spi­ral field tubes, the old HICONEX 834 sput­ter neg­a­tive ion source was re­placed by a new SNICS II sput­ter source and all old elec­tron­ic equip­ment in­clud­ing RMN and Hall probe gauss me­ters as well as low volt­age and high volt­age power sup­plies for the mag­nets, lens­es and ion sources were re­placed by new ones. The new equip­ment added to the tan­dem con­sists of a he­li­um neg­a­tive ion source, a new in­jec­tor based on a mul­ti-cath­ode ion source 40 MC-SNICS II for AMS ap­pli­ca­tions, a new GVM, a new puls­ing sys­tem in the mil­lisec­ond range and a new chop­per and bunch­ing sys­tem for puls­ing the ion beam in the nanosec­ond range. Now the tan­dem is cur­rent­ly op­er­at­ed in very sta­ble con­di­tions up to 9 MV on a basis of about 4000 hours/year ac­cel­er­at­ing a broad range of ion species.

Slides

• P.N. Ostroumov, J.D. Fuerst, S.M. Gerbick, M. Kedzie, M.P. Kelly, S.W.T. MacDonald, R.C. Pardo, S.I. Sharamentov, K. Shepard, G.P. Zinkann
  ANL, Argonne

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

The on­go­ing en­er­gy up­grade of the heavy-ion linac ATLAS at ANL in­cludes a new cry­omod­ule con­tain­ing seven 109MHz β=0.15 quar­ter-wave su­per­con­duct­ing cav­i­ties to pro­vide an ad­di­tion­al 15 MV volt­age. Sev­er­al new fea­tures have been in­cor­po­rat­ed into both the cav­i­ty and cry­omod­ule de­sign. For ex­am­ple, the cry­omod­ule sep­a­rates the cav­i­ty vac­u­um space from the in­su­lat­ing vac­u­um, a first for TEM cav­i­ties. The cav­i­ties are de­signed in order to can­cel the beam steer­ing ef­fect due to the RF field. Clean tech­niques have been ap­plied to achieve low-par­tic­u­late rf sur­faces and are es­sen­tial for re­li­able long-term high-gra­di­ent op­er­a­tion. The sealed clean sub­assem­bly con­sist­ing of cav­i­ties, beam spools, beam valves, cou­plers, vac­u­um man­i­fold, and sup­port frame has been at­tached to the top plate of the cry­omod­ule out­side the clean room. Ini­tial com­mis­sion­ing re­sults are pre­sent­ed. The mod­ule was de­signed and built as a pro­to­type for the Fa­cil­i­ty for Rare Iso­tope Beams (FRIB) driv­er linac, how­ev­er, a sim­i­lar de­sign can be ef­fec­tive­ly used in the front-end of SC pro­ton linacs based on TEM-class SC cav­i­ties.

Slides

• G.P. Zinkann, J.D. Fuerst, S.M. Gerbick, M. Kedzie, M.P. Kelly, S.W.T. MacDonald, P.N. Ostroumov, R.C. Pardo, S.I. Sharamentov
  ANL, Argonne
• K.W. Shepard
  TechSource, Santa Fe
• Z.A. Conway
  CLASSE, Ithaca

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

A new cry­omod­ule with seven low-be­ta su­per­con­duct­ing radio fre­quen­cy (SRF) quar­ter wave nio­bi­um cav­i­ties has been de­signed and con­struct­ed as an en­er­gy up­grade pro­ject for the ATLAS ac­cel­er­a­tor at Ar­gonne Na­tion­al Lab­o­ra­to­ry. The tech­nol­o­gy de­vel­oped for this pro­ject is the basis for the next gen­er­a­tion su­per­con­duct­ing heavy ion ac­cel­er­a­tors. This paper will dis­cuss the meth­ods em­ployed to tune the cav­i­ties eigen­fre­quen­cy to match the ac­cel­er­a­tor mas­ter os­cil­la­tor fre­quen­cy and the de­vel­op­ment of the RF sys­tems used to both drive the cav­i­ty and keep the cav­i­ty phase locked dur­ing op­er­a­tion.

Slides

• M. Pasini, S. Calatroni, A. D'Elia, M.A. Fraser, J.C. Gayde, G. Lanza, C. Lasseur, M. Lindroos, R. Maccaferri, C. Maglioni, D. Parchet, P. Trilhe
  CERN, Geneva

For the post-ac­cel­er­a­tor of ra­dioac­tive ion beams at CERN a major up­grade is planned to take place in the next 4-5 years. The up­grade con­sists in boost­ing the en­er­gy of the ma­chine from 3MeV/u up to 10 MeV/u with beams of mass-to-charge ratio 2.5<A/q<4.5 and in re­plac­ing part of the ex­ist­ing nor­mal con­duct­ing linac. The new ac­cel­er­a­tor is based on two gap in­de­pen­dent­ly phased 101.28 MHz Nb sput­tered su­per­con­duct­ing Quar­ter Wave Res­onators (QWRs). Two cav­i­ty ge­ome­tries, “low” and “high” β, have been se­lect­ed for cov­er­ing the whole en­er­gy range. A R&D pro­gram has start­ed in 2008 look­ing at the dif­fer­ent as­pects of the ma­chine, in par­tic­u­lar beam dy­nam­ics stud­ies, high β cav­i­ty de­vel­op­ment and cry­omod­ule de­sign. A sta­tus re­port of the dif­fer­ent ac­tiv­i­ties is given here.

Slides

• A. Plotnikov, E. Floch, E. Mustafin, E. Schubert, T. Seidl, I. Strašík
  GSI, Darmstadt
• A. Smolyakov
  ITEP, Moscow

In the frame of the FAIR pro­ject in spring 2008 an ir­ra­di­a­tion test of su­per­con­duct­ing mag­net com­po­nents was done at GSI Darm­stadt. Cave HHD with the beam dump of SIS18 syn­chrotron was taken as the test area. The beam dump was reequipped to meet the ir­ra­di­a­tion test re­quire­ments. There­by the first stage of prepa­ra­tion for the ir­ra­di­a­tion test was to in­ves­ti­gate the ra­di­a­tion field around the re­con­struct­ed beam dump from the point of view of ra­di­a­tion safe­ty. FLUKA sim­u­la­tions were per­formed to es­ti­mate the dose rate in­side and im­me­di­ate out­side of the cave dur­ing the ir­ra­di­a­tion. The sim­u­la­tions showed safe level of the ra­di­a­tion field, and it was later con­firmed by the mea­sure­ments pro­vid­ed by the ra­di­a­tion safe­ty group of GSI.

• A. Parravicini, G. Balbinot, J. Bosser, E. Bressi, M. Caldara, L. Lanzavecchia, M. Pullia, M. Spairani
  CNAO, Milano
• C. Biscari
  INFN/LNF, Frascati

The Cen­tro Nazionale di Adroter­apia On­co­log­i­ca (CNAO) is the first Ital­ian cen­ter for deep hadron­ther­a­py, name­ly an in­no­va­tive type of on­co­log­i­cal ra­dio­ther­a­py using hadrons. The CNAO ma­chine in­stal­la­tion is in progress and al­ter­nates with lines com­mis­sion­ing, start­ed in the Sum­mer 2008. The pre­sent paper re­ports about Beam Di­ag­nos­tics (BD) choic­es, sta­tus and post-com­mis­sion­ing eval­u­a­tion, as con­cerns the Low En­er­gy Beam Trans­fer (LEBT) line mon­i­tors.

• P.N. Potukuchi, D. Kanjilal, K.K. Mistri, A. Rai, A. Roy, S.S.K. Sonti, J. Zacharias
  IUAC, New Delhi

The fa­cil­i­ty for con­struct­ing su­per­con­duct­ing nio­bi­um res­onators in­dige­nous­ly was com­mis­sioned at the In­ter- Uni­ver­si­ty Ac­cel­er­a­tor Cen­tre in 2002. It was pri­mar­i­ly setup to fab­ri­cate nio­bi­um quar­ter wave res­onators for the su­per­con­duct­ing boost­er linac. Start­ing with a sin­gle quar­ter wave res­onator in the first phase, two com­plete­ly in­dige­nous res­onators were suc­cess­ful­ly built, test­ed and in­stalled in the cry­omod­ules. Sub­se­quent­ly pro­duc­tion of fif­teen more res­onators for the sec­ond and third mod­ules began. Sev­er­al ex­ist­ing res­onators have been suc­cess­ful­ly re­worked and re­stored from a va­ri­ety of prob­lems. In ad­di­tion to build­ing res­onators for the in-house pro­grams, a pro­ject to build two sin­gle spoke res­onators for Pro­ject- X at Fermi Lab, USA has also been taken up. A Tes­la-type sin­gle cell cav­i­ty is also being built in col­lab­o­ra­tion with RRCAT, In­dore. This paper pre­sents de­tails of the fab­ri­ca­tion, test re­sults and fu­ture plans.

• S. Canella, A. Beltramin, A. Calore, T. Contran, P. Modanese, F. Poletto
  INFN/LNL, Legnaro

In the LNL Heavy Ion Ac­cel­er­a­tor Com­plex, ALPI is a su­per­con­duct­ing lin­ear ac­cel­er­a­tor (Linac) whose first runs date back to 1993. In more than 15 years the LNL ALPI Linac evolved from an ini­tial small con­fig­u­ra­tion of 5 cryostats and 16 res­onators to the ac­tu­al size of 20 cryostats and 74 res­onators. The su­per­con­duct­ing char­ac­ter of ALPI im­plies the avail­abil­i­ty of a large cryo­genic plant and dis­tri­bu­tion sys­tem to sup­ply the liq­uid he­li­um nec­es­sary to keep the res­onators at 4.2 K. While the Linac struc­ture has grown in the years and, in the mean time, the re­lat­ed cryo­genic plant and dis­tri­bu­tion sys­tems were en­larged and up­grad­ed twice, the re­lat­ed con­trol sys­tem re­mained large­ly un­changed in its main parts and it is now the first sub-sys­tem that ur­gent­ly needs a deep re­new­ing. The chal­lenge to ren­o­vate a work­ing con­trol sys­tem with lim­it­ed shut-downs is the sub­ject of this pre­sen­ta­tion.

• 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.