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Etude de la compensation de charge d'espace dans les lignes basse énergie des accélérateurs d'ions légers de haute intensité

Abstract : The study of intense ion beam dynamics in lowenergy beam transport line (LEBT) representsone of the most important challenges inaccelerating sciences. At low energy, it isdominated by the space-charge field created bythe beam itself, which is generally non-linearand can induce halo, emittance growth and beamlosses. But, a ion beam at low energypropagating in a LEBT ionises the residual gas.The particles (ions and electrons) fromionisation are repelled or confined radially bythe space charge field according to their chargesign.Other interactions take place in the LEBT,modifying the beam dynamics and the space chargecompensation time and the space-chargecompensation yield. In order to obtain predictiveand precise results quantitatively, numericalsimulations of beam transport in space-chargecompensation regime with WARP code havebeen realized taking account the most probablephysical interactions. Then, we will discuss theresults with comparisons with experimental dataobtained on the MYRRHA and IFMIF LEBT’s
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Submitted on : Tuesday, June 19, 2018 - 4:20:07 PM
Last modification on : Friday, May 29, 2020 - 3:41:28 AM
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  • HAL Id : tel-01818883, version 1

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Frédéric Gerardin. Etude de la compensation de charge d'espace dans les lignes basse énergie des accélérateurs d'ions légers de haute intensité. Physique des accélérateurs [physics.acc-ph]. Université Paris-Saclay, 2018. Français. ⟨NNT : 2018SACLS001⟩. ⟨tel-01818883⟩

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