MOPOT —  Poster Session 1   (23-Aug-10   16:10—17:50)
Paper Title Page
MOPOT001 Operation of KeiGM for the Carbon Ion Therapy Facility at Gunma University 40
 
  • M. Muramatsu, S. Hojo, A. Kitagawa
    NIRS, Chiba-shi, Japan
  • Y. Kijima
    Mitsubishi Electric Corp., Energy & Public Infrastructure Systems Center, Kobe, Japan
  • H. Miyazaki, K. Sawada, T. Ueno
    SHI, Ehime, Japan
  • K. Torikai, S. Yamada
    Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan
  • M. Tsuchiyama, S. Ueda
    Mitsubishi Electric Corp., Energy Systems Centre, Kobe, Japan
 
  Car­bon-ion ra­dio­ther­a­py has been car­ried out at Gunma Uni­ver­si­ty Heavy Ion Med­i­cal Cen­tre (GHMC) since March 2010. A com­pact ECR ion source for GHMC, so-called KeiGM, sup­plies C4+ ions for treat­ment. A mi­crowave source with the trav­el­ing-wave-tube was adopt­ed for KeiGM, with a fre­quen­cy range and max­i­mum power of 9.75 - 10.25 GHz and 750 W, re­spec­tive­ly. KeiGM was op­er­at­ed from March to May 2010 for the clin­i­cal trial with­out any trou­ble and main­te­nance. KeiGM sup­plied the car­bon ions from 7:30 in the morn­ing to 0:00 mid­night on week­days. Some­times it was op­er­at­ed for the beam tun­ing of ac­cel­er­a­tor on Sat­ur­day and Sun­day too. The op­er­a­tion time of KeiGM for two months was about 780 hours. Al­though the beam in­ten­si­ty de­creased by 20% at first, it has been con­stant for the last two months. The beam in­ten­si­ty of C4+ was 200 euA at 30 kV ex­trac­tion in May 2010. The fluc­tu­a­tion of beam in­ten­si­ty was less than 10%. The op­er­a­tion pa­ram­e­ters were as fol­lows; the mi­crowave fre­quen­cy and power were 10.042 GHz and 300 W, re­spec­tive­ly. CH4 gas was fed, and the gas flowrate was 0.054 cc/min. The ex­trac­tion volt­age was 30 kV. The rep­e­ti­tion fre­quen­cy and pulse width were 0.36 Hz and 50 msec, re­spec­tive­ly. Gunma Uni­ver­si­ty has suc­cess­ful­ly treat­ed the first 12 pa­tients for the clin­i­cal trial, thus the Japanese Min­istry of Health and Labor Wel­fare ap­proved GHMC as “ad­vanced medicine”. We will re­port the op­er­a­tion of KeiGM and the sta­tus of their daily treat­ment.  
poster icon Poster MOPOT001 [2.685 MB]  
 
MOPOT002 Two-Chamber Configuration of the Bio-Nano ECRIS 43
 
  • T. Uchida, H. Minezaki, Y. Yoshida
    Toyo University, Kawagoe-shi, Saitama, Japan
  • T. Asaji, K. Tanaka
    Tateyama Machine Co. Ltd., Toyama-shi, Japan
  • S. Biri, R. Rácz
    ATOMKI, Debrecen, Hungary
  • Y. Kato
    Osaka University, Graduate School of Engineering, Osaka, Japan
  • A. Kitagawa, M. Muramatsu
    NIRS, Chiba-shi, Japan
 
  The Bio-Nano ECRIS was de­signed for new ma­te­ri­als pro­duc­tion on nano-scale [1]. Our main tar­get is the en­do­he­dral fullerene, which have po­ten­tial in med­i­cal care, biotech­nol­o­gy and nan­otech­nol­o­gy. In par­tic­u­lar, iron-en­cap­su­lat­ed fullerene can be ap­plied as a con­trast ma­te­ri­al for mag­net­ic res­o­nance imag­ing or mi­crowave heat ther­a­py. There are sev­er­al promis­ing ap­proach­es to pro­duce the en­do­he­dral fullerenes using an ECRIS. One of them is the ion-ion col­li­sion re­ac­tion of fullerenes and aliens ions to be en­cap­su­lat­ed in the mix­ture plas­ma of them. An­oth­er way is the shoot­ing of ion beam into a pre-pre­pared fullerene layer. In this study, the new de­vice con­fig­u­ra­tion of the Bio-Nano ECRIS is re­port­ed which al­lows the ap­pli­ca­tion of both meth­ods. The plas­ma cham­ber is di­vid­ed into two cham­bers by in­stalling mesh elec­trodes. In the gas in­jec­tion-side 1st cham­ber at 2.45 GHz plas­mas (N2, Ar, He, Fe,…) are pro­duced on the usual way. These ions then are ex­tract­ed to the 2nd cham­ber where an evap­o­ra­tion boat for fullerene is in­stalled. The fullerene neu­trals can be ion­ized (using 10 GHz in the 2nd cham­ber) and are de­posit­ed on a large plas­ma elec­trode where they are con­tin­u­ous­ly ir­ra­di­at­ed by the ions from the 1st cham­ber. The ions pro­duced ei­ther in the 1st or 2nd cham­ber can be in-situ ex­tract­ed and an­a­lyzed. The basic con­cept and the pre­lim­i­nary re­sults using Ar gas and N2 gas plas­mas will be pre­sent­ed.
[1] T. Uchida et al., Proc. ECRIS08, Chicago, USA, pp. 27-31 (2008)
 
poster icon Poster MOPOT002 [6.248 MB]  
 
MOPOT003 Study of Potential Application of Compact ECRIS to Analytical System 46
 
  • M. Kidera
    RIKEN Nishina Center, Wako, Japan
  • S. Enomoto
    Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
  • S. Kishi, Y. Seto
    National Research Institute of Police Science, Chiba, Japan
  • T. Nagamatsu, T. Tanaka
    Tokyo University of Science, Faculty of Engineering Division I, Tokyo, Japan
  • K. Takahashi
    RIKEN, Saitama, Japan
 
  A place of an ac­tiv­i­ty of ECR ion sources is not only ion source on a heavy ion ac­cel­er­a­tor fa­cil­i­ty. A high­ly ion­iza­tion ef­fi­cien­cy, flex­i­bil­i­ty of ion­ized sam­ple, low con­sump­tion rate in sam­ple, and non-equi­lib­ri­um ECR plas­ma, etc. that a ECR ion source have, may be need­ed in other fields at time. We have de­vel­oped sev­er­al kinds of small ECRISs that have cus­tomized for the anal­y­sis. The pur­pos­es of the anal­y­sis are, pre­cise mea­sure­ment of iso­tope ratio of a metal el­e­ment, de­tec­tion of chem­i­cal war­fare agents, and de­tec­tion of pro­duced molec­u­lar (or frag­ment) ions by the ECR plas­ma. In this work­shop, we will re­port the com­pact ECRISs by a per­ma­nent mag­net type for the an­a­lyt­i­cal sys­tem.  
poster icon Poster MOPOT003 [3.320 MB]  
 
MOPOT004 Neutralisation of Accelerated Ions and Detection of Resulting Neutrals 49
 
  • T. Peleikis, L. Panitzsch, M. Stalder
    IEAP, Kiel, Germany
 
  At the Uni­ver­si­ty of Kiel, the De­part­ment of Ex­per­i­men­tal and Ap­plied Physics is run­ning an ECR ion source in order to, amongst oth­ers, cal­i­brate space in­stru­ments de­signed to mea­sure solar wind prop­er­ties and suprather­mal par­ti­cles. The ion source is able to pro­duce medi­um to high­ly charged ions which are then ac­cel­er­at­ed by an elec­tro­stat­ic field up to 400keV per charge. In order to ex­tend the par­ti­cle spec­trum from ions to neu­tral atoms we are plan­ning to in­stall a de­vice for the beam par­ti­cle neu­tral­i­sa­tion. It will be used to cal­i­brate in­stru­ments which mea­sure neu­tral par­ti­cles. This de­vice will be lo­cat­ed down­stream from the sec­tor mag­net and the ac­cel­er­a­tion-stage. The sec­tor mag­net sep­a­rates the ions by their m/q ratio. This way the type and the en­er­gy of the ions can be de­ter­mined be­fore the neu­tral­i­sa­tion. Neu­tral­i­sa­tion can be achieved ei­ther by pass­ing the ions through a thin car­bon foil (thick­ness ~88nm) or through a gas­tar­get (thick­ness ~6mm, pres­sure ~0.1mbar) where charge-ex­change occur. The re­main­ing ions be­hind the neu­tralis­er will be sup­pressed by an elec­tro­stat­ic sep­a­ra­tor. Both meth­ods will alter the beam prop­er­ties and lead to a di­ver­gence in en­er­gy and an an­gu­lar spread of the beam. Sim­u­la­tions re­gard­ing these ef­fects will be dis­cussed. The over­all progress on this pro­ject will be pre­sent­ed.  
poster icon Poster MOPOT004 [1.776 MB]  
 
MOPOT005 High Current Production with 2.45 GHz ECR Ion Source 50
 
  • A. Coly, T. Lamy, T. Thuillier
    LPSC, Grenoble Cedex, France
  • G. Gaubert, A.C.C. Villari
    PANTECHNIK, BAYEUX, France
 
  A new test bench has been in­stalled at LPSC ded­i­cat­ed to 2.45 GHz ECR Ion Sources char­ac­ter­i­za­tion. Sev­er­al mag­net­ic struc­tures have been test­ed around the same plas­ma cav­i­ty. For ex­am­ple, a cur­rent den­si­ty of 70 mA/cm2 has been mea­sured with the MONO1000 source lent by GANIL. An orig­i­nal ECRIS, named SPEED (for 'Source d'ions à aimants PEr­ma­nents et Ex­trac­tion Dipôlaire'), pre­sent­ing a dipo­lar mag­net­ic field at the ex­trac­tion will also be pre­sent­ed.  
poster icon Poster MOPOT005 [3.130 MB]  
 
MOPOT006 Ionization Efficiency of a COMIC Ion Source Equipped With a Quartz Plasma Chamber 51
 
  • P. Suominen, T. Stora
    CERN, Geneva, Switzerland
  • J. Médard, P. Sortais
    LPSC, Grenoble, France
 
  The ISOL­DE fa­cil­i­ty at CERN pro­duces a wide range of ra­dioac­tive ion beams due to a long his­to­ry on tar­get and ion source de­vel­op­ment. Be­cause the ra­dioac­tive iso­tope pro­duc­tion is very lim­it­ed, the most im­por­tant ion source pa­ram­e­ters are high ion­iza­tion ef­fi­cien­cy, se­lec­tiv­i­ty and re­li­able op­er­a­tion under in­tense ra­di­a­tion. Cur­rent­ly used ion sources (main­ly laser (RILIS [1]) and arc dis­charge -type ion sources (VADIS [2]) do not ef­fi­cient­ly ion­ize light noble gases, such as he­li­um, and molecules, such as CO, N2 and NO. These beams were pre­vi­ous­ly planned to be pro­duced with 1+ ECR ion sources op­er­at­ing at 2.45 GHz (for ex­am­ple MIN­I­MONO [3]) but due to new and more ef­fi­cient RF cou­pling of COM­IC-type ion sources [4], we ex­pect to ad­vance in 2.45 GHz ECRIS uti­liza­tion for ra­dioac­tive beam pro­duc­tion. The new COMIC source de­signed by LPSC, Greno­ble in­cor­po­rates spe­cial fea­tures such as a plas­ma cham­ber fully made of quartz (Q-COM­IC). This should pro­vide chem­i­cal­ly good con­di­tions for molec­u­lar ion beam pro­duc­tion, es­pe­cial­ly for car­bon. This paper pre­sents the first ion­iza­tion ef­fi­cien­cy mea­sure­ments of the Q-COM­IC.
[1] V.N. Fedosseev, et al, Nucl. Instrum. Methods Phys. Res. B 266/19-20 (2008) 4378.
[2] PhD thesis, univ. polyt. Bucarest, L. Penescu (2009).
[3] F. Wenander, W. Farabolini, G. Gaubert, P. Jardin, J. Lettry, Nucl. Phys. A, 746 (2004) 659.
[4] P. Sortais, T. Lamy, J. Médard, J. Angot, L. Latrasse, and T. Thuillier, Rev. Sci. Instrum. 81 (2010) 02B314.
 
poster icon Poster MOPOT006 [0.697 MB]  
 
MOPOT008 He2+ Source Based on Penning Discharge with Additional 75 GHz ECR Heating 54
 
  • A. Vodopyanov, S. Golubev, I. Izotov, A. Mansfeld
    IAP/RAS, Nizhny Novgorod, Russia
  • G. Yushkov
    Institute of High Current Electronics, Tomsk, Russia
 
  It is well known that one can reach high av­er­age charge of ions in the ECR plas­ma by in­creas­ing plas­ma den­si­ty and de­creas­ing neu­tral gas pres­sure. ECR dis­charge could be re­al­ized at very low gas pres­sure, but dis­charge start­up takes longer time when gas pres­sure is low. So, it is im­pos­si­ble to re­al­ize ECR dis­charge with lim­it­ed mi­crowave heat­ing pulse du­ra­tion at gas pres­sure lower cer­tain thresh­old value. This prob­lem could be solved with help of trig­ger plas­ma, which should be ig­nit­ed at low gas pres­sure in the trap with high mag­net­ic field. This fore plas­ma could help to de­crease ECR plas­ma start­up time sig­nif­i­cant­ly and make it pos­si­ble to re­al­ize ECR plas­ma at very low pres­sure in pulse op­er­a­tion regime. We sug­gest pen­ning type dis­charge as a trig­ger dis­charge for fast start­up of pulsed ECR plas­ma. Pen­ning type dis­charge glows at as low pres­sure as need­ed. Dis­charge was re­al­ized in the sim­ple mir­ror mag­net­ic trap at pres­sure about 10-5 mbar. He­li­um was used as an op­er­at­ing gas. Sig­nif­i­cant plas­ma den­si­ty (about 1011 cm-3) was ob­tained at the mo­ment just be­fore mi­crowave heat­ing pulse start­ed. Gy­rotron ra­di­a­tion with fre­quen­cy of 75 GHz, mi­crowave power up to 200 kW and pulse du­ra­tion up to 1 ms, was used for plas­ma heat­ing. In the pre­sent work the fully striped he­li­um ions were demon­strat­ed, av­er­age charge of ions in the plas­ma was equal 2. Tem­po­ral evo­lu­tion of charge state dis­tri­bu­tion was in­ves­ti­gat­ed. Charge state dis­tri­bu­tion over he­li­um pres­sure was also stud­ied.  
poster icon Poster MOPOT008 [0.535 MB]  
 
MOPOT010 The Light Ion Guide CB-ECRIS Project at the Texas A&M University Cyclotron Institute 55
 
  • G. Tabacaru
    Texas A&M University, Cyclotron Institute, College Station, USA
  • J. Ärje
    JYFL, Jyväskylä, Finland
  • D.P. May
    Texas A&M University Cyclotron Institute, College Station, Texas, USA
 
  Texas A&M is cur­rent­ly con­fig­ur­ing a scheme for the pro­duc­tion of ra­dioac­tive-ion beams that in­cor­po­rates a light-ion guide (LIG) cou­pled with an ECRIS con­struct­ed for charge-boost­ing (CB-ECRIS). This scheme is part of an up­grade to the Cy­clotron In­sti­tute and is in­tend­ed to pro­duce ra­dioac­tive beams suit­able for in­jec­tion into the K500 su­per­con­duct­ing cy­clotron. The prin­ci­ple of op­er­a­tion is the fol­low­ing: a pri­ma­ry beam from the K150 cy­clotron in­ter­acts with a pro­duc­tion tar­get placed in the gas cell. A con­tin­u­ous flow of he­li­um gas main­tains a con­stant pres­sure of 500 mbar max­i­mum in the cell. Re­coils are ther­mal­ized in the he­li­um buffer gas and eject­ed from the cell with­in the gas flow through a small exit hole. The pos­i­tive­ly charged re­coil ions (1+) are guid­ed into a 2.5 m long, rf-on­ly hexapole and will be trans­port­ed in this man­ner on-ax­is into the CB-ECRIS. The CB-ECRIS op­er­ates at 14.5 GHz and has been spe­cial­ly con­struct­ed by Sci­en­tif­ic So­lu­tions of San Diego, Cal­i­for­nia for charge-boost­ing. An overview of the en­tire pro­ject will be pre­sent­ed with de­tails on dif­fer­ent con­struc­tion phas­es. Spe­cif­ic mea­sure­ments and re­sults will be pre­sent­ed as well as fu­ture de­vel­op­ment plans.  
poster icon Poster MOPOT010 [12.413 MB]  
 
MOPOT011 DRAGON: a New 18 GHz RT ECR Ion Source with a Large Plasma Chamber 58
 
  • W. Lu, D. Xie, X.Z. Zhang, H.W. Zhao
    IMP, Lanzhou, People's Republic of China
  • W. Lu
    Graduate School of the Chinese Academy of Sciences, Beijing, People's Republic of China
  • L. Ruan, F.C. Song, B. Xiong, S. Yu, J. Yuan
    IEE, Beijing, People's Republic of China
 
  Build­ing a strong ra­di­al mag­net­ic field with a per­ma­nent hexapole mag­net for an ECRIS is ex­treme­ly chal­leng­ing so that the con­ven­tion­al wis­dom re­quires a small but not op­ti­mal plas­ma cham­ber that is typ­i­cal­ly of ID less or equal to 80 mm. A new 18 GHz RT ECR ion source, DRAG­ON, has been de­signed with a large bore per­ma­nent hexapole and source con­struc­tion has begun at IMP. Its plas­ma cham­ber is of ID of 126 mm, the same as that of the su­per­con­duct­ing ion source SE­CRAL, with max­i­mum ra­di­al field strength reach­ing 1.5 Tesla at the plas­ma cham­ber wall. The over­all mag­net­ic strengths of DRAG­ON, with max­i­mum axial fields of 2.7 Tesla at the in­jec­tion and 1.3 Tesla at the ex­trac­tion, are very sim­i­lar to those of SE­CRAL op­er­at­ing at 18 GHz and hope­ful­ly the SE­CRAL per­for­mance. The source solenoid mag­net coils are cooled by an evap­o­ra­tive coolant at about 50 de­gree C. In ad­di­tion, the source is thick­ly in­su­lat­ed for beam ex­trac­tion at 50 kV and high­er volt­age up to 100 kV can be ex­plored. This ar­ti­cle will pre­sent the de­sign de­tails and dis­cus­sions of this new ion source.  
poster icon Poster MOPOT011 [0.563 MB]  
 
MOPOT012 Tests of the Versatile Ion Source (VIS) for High Power Proton Beam Production 61
 
  • S. Gammino, G. Castro, L. Celona, G. Ciavola, D. Mascali, R. Miracoli
    INFN/LNS, Catania, Italy
  • G. Adroit, O. Delferrière, R. Gobin, F. Senée
    CEA/DSM/IRFU, France
  • F. Maimone
    GSI, Darmstadt, Germany
 
  The sources adapt­ed to beam pro­duc­tion for high power pro­ton ac­cel­er­a­tors must obey to the re­quest of high bright­ness, sta­bil­i­ty and re­li­a­bil­i­ty. The Ver­sa­tile Ion Source (VIS) is based on per­ma­nent mag­nets (max­i­mum value around 0.1 T on the cham­ber axis) pro­duc­ing an off-res­o­nance mi­crowave dis­charge. It op­er­ates up to 75 kV with­out a bulky high volt­age plat­form, pro­duc­ing sev­er­al tens of mA of pro­ton beams and monocharged ions. The mi­crowave in­jec­tion sys­tem and the ex­trac­tion elec­trodes ge­om­e­try have been de­signed in order to op­ti­mize the beam bright­ness. More­over, the VIS source en­sures long time op­er­a­tions with­out main­te­nance and high re­li­a­bil­i­ty in order to ful­fil the re­quire­ments of the fu­ture ac­cel­er­a­tors. A de­scrip­tion of the main com­po­nents and of the source per­for­mances will be given. A brief sum­ma­ry of the pos­si­ble op­tions for next de­vel­op­ments of the pro­ject will be also pre­sent­ed, par­tic­u­lar­ly for pulsed mode op­er­a­tions, that are rel­e­vant for some fu­ture pro­jects (e.g. the Eu­ro­pean Spal­la­tion Source of Lund).  
 
MOPOT013 MONOBOB II : Latest Results of Monocharged Ion Source for SPIRAL2 Project 64
 
  • M. Dubois, O. Bajeat, C. Barue, C. Canet, M. Dupuis, J.L. Flambard, R. Frigot, P. Jardin, C. Leboucher, N. Lecesne, P. Lecomte, P. Lehérissier, F. Lemagnen, L. Maunoury, O. Osmond, J.Y. Pacquet, A. Pichard
    GANIL, Caen, France
 
  MONOBOB II is an elec­tron cy­clotron res­o­nance ion source (ECRIS) based on a cylin­dri­cal sym­me­try mag­net­ic struc­ture [1]. It has been de­signed for the SPI­RAL2 pro­ject in order to ion­ize ra­dioac­tive gases com­ing from the pro­duc­tion tar­gets of the Tar­get Ion Source Sys­tem (TISS). The goal is to build a long-lived ECRIS with the aim of run­ning three months in the hos­tile en­vi­ron­ment of the pro­duc­tion tar­get while keep­ing high ion­iza­tion ef­fi­cien­cies. The Tar­get Ion Source Sys­tem has been test­ed using noble gases (He, Ne, Ar, Kr and Xe), with and with­out tar­get in order to ob­serve the be­hav­ior of the source cou­pled to the tar­get. Cur­rent­ly, the tar­get is made of ~1000 car­bon slices, hav­ing the same ge­om­e­try as the final UCx tar­get. So far, its tem­per­a­ture has been lim­it­ed to 1500°C. Ion­iza­tion ef­fi­cien­cies and re­sponse times of the TISS have been mea­sured ver­sus gases and tar­get tem­per­a­ture [2]. Re­sults should lead to de­ter­mine the max­i­mum ra­dioac­tive ion pro­duc­tion which can be rea­son­ably ex­pect­ed with the final TISS. The sta­tus of this de­vel­op­ment will be pre­sent­ed.  
poster icon Poster MOPOT013 [0.858 MB]  
 
MOPOT014 The Design of 28 GHz ECR Ion Source for the Compact Linear Accelerator in Korea 67
 
  • M. Won, B.S. Lee
    Korea Basic Science Institute, Busan, Republic of Korea
 
  The con­struc­tion of a com­pact lin­ear ac­cel­er­a­tor is in progress by Korea Basic Sci­ence In­sti­tute. The main ca­pa­bil­i­ty of this fa­cil­i­ty is the pro­duc­tion of mul­ti­ply ion­ized metal clus­ters and the gen­er­a­tion more in­tense beams of high­ly charged ions for ma­te­ri­al, med­i­cal and nu­cle­ar phys­i­cal re­search. To pro­duce the in­tense beam of high­ly charged ions, we will con­struct an Elec­tron Cy­clotron Res­o­nance Ion Source (ECRIS) using 28 GHz mi­crowaves. For this ECRIS, The de­sign of a su­per­con­duct­ing mag­net, mi­crowave inlet, beam ex­trac­tion and plas­ma cham­ber was com­plet­ed. Also we are con­struct­ing a su­per­con­duc­ing mag­net sys­tem. In this pre­sen­ta­tion, we will re­port the cur­rent sta­tus of de­vel­op­ment of our 28 GHz ECRIS.  
poster icon Poster MOPOT014 [3.823 MB]  
 
MOPOT015 The Design Study of Superconducting Magnet System for an Advanced ECR Ion Source 68
 
  • B.S. Lee, M. Won
    Korea Basic Science Institute, Busan, Republic of Korea
 
  Funding: This work was supported by KBSI grant (D30300) to M.S.Won
The Korea Basic Sci­ence In­sti­tute is de­vel­op­ing a su­per­con­duct­ing mag­net sys­tem for 28 GHz Elec­tron Cy­clotron Res­o­nance Ion Souce (ECRIS). We are in­veti­gat­ing in order to re­al­ize com­pact size, eco­nom­ic op­er­a­tion and gen­er­a­tion of high cur­rent beam. Al­though com­pa­nies and re­searchers have valu­able ex­pe­ri­ence, skill and abil­i­ty in de­sign­ing of su­per­con­duct­ing mag­net for ECRIS, they did not ex­act­ly pro­posed a ex­cel­lent su­per­con­duct­ing mag­net sys­tem for ECRIS be­cause many su­per­con­duct­ing mag­nets were not re­quired. Of course they do if we re­quried many mag­nets for the var­i­ous ap­pli­a­tion of ECRIS. In this pre­sen­ta­tion, we have filed re­ports of for­mer re­seach­er and we have dis­cussed the re­al­iza­tion of ECRIS over 35 GHz.
 
poster icon Poster MOPOT015 [7.135 MB]  
 
MOPOT016 A Low Power Survey of Radial-Offset Axial Sputtering and High Intensity Uranium Production from Axial Sputtering in SuSI 69
 
  • D.G. Cole, G. Machicoane, T. Ropponen, L.T. Sun, L. Tobos
    NSCL, East Lansing, Michigan, USA
 
  Pro­to­type sput­ter­ing hard­ware has been test­ed in the SuSI ion source and early ura­ni­um ion pro­duc­tion is dis­cussed. Also, re­sults of a low power sur­vey of axial sput­ter­ing, to test sput­ter­ing ef­fi­cien­cy at in­cre­men­tal ra­di­al off­sets from on axis po­si­tion, is re­port­ed.  
poster icon Poster MOPOT016 [2.672 MB]  
 
MOPOT017 Tests of a New Axial Sputtering Technique in an ECRIS 72
 
  • R.H. Scott, R.C. Pardo, R.C. Vondrasek
    ANL, Argonne, USA
 
  Funding: This work is supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract No. DE-AC02-06CH11357.
Axial and ra­di­al sput­ter­ing tech­niques have been used over the years to cre­ate beams from an ECRIS at mul­ti­ple ac­cel­er­a­tor fa­cil­i­ties. Op­er­a­tional ex­pe­ri­ence has shown greater beam pro­duc­tion when using the ra­di­al sput­ter­ing method ver­sus axial sput­ter­ing. At Ar­gonne Na­tion­al Lab­o­ra­to­ry, pre­vi­ous work with ra­di­al sput­ter­ing has demon­strat­ed that the po­si­tion of the sput­ter sam­ple rel­a­tive to the plas­ma cham­ber wall in­flu­ences sam­ple drain cur­rent, beam pro­duc­tion and charge state dis­tri­bu­tion. The pos­si­bil­i­ty of the cham­ber wall act­ing as a ground plane which in­flu­ences the sput­ter­ing of ma­te­ri­al has been con­sid­ered, and an at­tempt has been made to mimic this pos­si­ble ground plane ef­fect with a coax­i­al sam­ple in­tro­duced from the in­jec­tion end. Re­sults of these tests will be shown as well as com­par­isons of out­puts using the two meth­ods.
 
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