Author: Leherissier, P.     [Lehérissier, P.]
Paper Title Page
MOCOCK05 Multigan®: a New Multicharged Ion Source Based on Axisymetric Magnetic Structure 37
 
  • L. Maunoury, P. Delahaye, M. Dubois, P. Jardin, P. Lehérissier, M. Michel, J.Y. Pacquet
    GANIL, Caen, France
  • S. Biri
    ATOMKI, Debrecen, Hungary
  • X. Donzel, G. Gaubert, R. Leroy, A.C.C. Villari
    PANTECHNIK, BAYEUX, France
  • C. Pierret
    CIMAP, Caen, France
 
  Stan­dard ECR ion sources have ra­di­al mag­net­ic field cre­at­ed by a mul­ti-pole, e.g. hexapole or high­er order, which fills all space in the cen­ter of the source struc­ture. Based on the Mono­gan® ECRIS [1] con­cept, a new mul­ti­charged ECR ions source has been de­signed with a large open­ing space in the cen­ter of the source struc­ture. This par­tic­u­lar de­sign al­lows, in a first ap­proach, di­rect ra­di­al con­tact with the ECR plas­ma, al­low­ing po­si­tion­ing of probes and tar­gets for ra­dioac­tive beam pro­duc­tion very close to the plas­ma re­gion. Sec­ond­ly, the ab­sence of a mul­ti-pole al­lows con­sid­er­ing ex­treme­ly high mag­net­ic fields with sig­nif­i­cant­ly small­er struc­tural con­straints. This source is com­bin­ing the ad­van­tages of the ax­isy­met­ric mag­net­ic fea­ture of Mono­gan® with high­er fre­quen­cies. This paper will de­scribe the mag­net­ic struc­ture cal­cu­la­tion as well as the me­chan­i­cal de­sign and stress­es of a full per­ma­nent mag­net ion source using this con­cept. This source will be the first pro­to­type of such an ECR ion source. Fi­nal­ly, using Trap­Cad code [2], an es­ti­ma­tion of the elec­tron­ic en­er­gy dis­tri­bu­tion has been cal­cu­lat­ed and thus, the per­for­mance of the source has been de­duced. The beam for­ma­tion and ex­trac­tion were also rough­ly cal­cu­lat­ed tak­ing into ac­count mag­net­ic and elec­tric fields.
[1] P. Jardin et al., Review of Scientific Instruments, 73, 789 (2002).
[2] L. Maunoury et al., Plasma Sources Science and Technology , 18, 015019 (2009).
 
slides icon Slides MOCOCK05 [5.532 MB]  
 
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]