Author: Lakshmy, P.S.
Paper Title Page
MOCOCK02 3D Simulation Studies and Optimization of Magnetic Holes of HTS-ECRIS for Improving the Extraction Efficiency and Intensities of Highly Charged Ions 27
 
  • G. Rodrigues, R.N. Dutt, D. Kanjilal, P.S. Lakshmy, Y. Mathur, U.K. Rao, A. Roy
    IUAC, New Delhi, India
  • R. Baskaran
    IGCAR, Channai, India
  
  3D sim­u­la­tion stud­ies using RADIA code have been per­formed to op­ti­mise the mag­net­ic holes in high tem­per­a­ture su­per­con­duct­ing elec­tron cy­clotron res­o­nance (HTS-ECRIS) ion source for im­prov­ing the ex­trac­tion ef­fi­cien­cy and in­ten­si­ties of high­ly charged ions. The mag­net­ic field im­prove­ments using sim­ple tech­niques like op­ti­mi­sa­tion of iron re­gions is found to be eco­nom­i­cal. The ex­trac­tion ef­fi­cien­cy can be in­creased three-fold in the case of a hexapole mag­net de­pend­ing on the level of the uni­for­mi­ty of the fields in the high and low re­gions. This tech­nique fur­ther min­imis­es lo­cal­ized heat­ing of the plas­ma cham­ber walls which can im­prove the vac­u­um con­di­tions in an ECR ion source. For su­per­con­duct­ing sources where the x-ray heat load poses se­vere prob­lems dur­ing op­er­a­tion, such a re­duc­tion of heat­ing load is of great sig­nif­i­cance. The typ­i­cal tri­an­gu­lar pat­tern of the plas­ma im­pact ob­served on the plas­ma elec­trode of HTS ECRIS at var­i­ous tun­ing con­di­tions are re­pro­duced by the sim­u­la­tions. De­tails of the sim­u­la­tions and ex­per­i­men­tal re­sults will be pre­sent­ed.  
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