CERN Accelerating science

002825275 001__ 2825275
002825275 003__ SzGeCERN
002825275 005__ 20220825224329.0
002825275 0247_ $$2DOI$$9IOP$$a10.1088/1742-6596/2244/1/012036
002825275 0248_ $$aoai:cds.cern.ch:2825275$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002825275 035__ $$9HAL$$ahal-03658007
002825275 035__ $$9https://inspirehep.net/api/oai2d$$aoai:inspirehep.net:2075191$$d2022-08-24T14:14:44Z$$h2022-08-25T06:25:52Z$$mmarcxml
002825275 035__ $$9Inspire$$a2075191
002825275 041__ $$aeng
002825275 100__ $$aLettry, J$$mJacques.lettry@cern.ch$$uCERN
002825275 245__ $$9IOP$$aBeam Formation Studies on the CERN IS03b H$^-$ Source
002825275 246__ $$aBeam Formation Studies on the CERN IS03b H Source
002825275 260__ $$c2022
002825275 300__ $$a5 p
002825275 520__ $$9IOP$$aAn H$^{-}$ ion source is being operated at the new 160 MeV linear injector (Linac4) of the CERN accelerator complex. The source’s plasma is of the Radio Frequency Inductively Coupled Plasma type (RF-ICP), without magnetic cusp and runs with Cs-loss compensation  1 . Vertical downward oriented filter- and electron dump-dipolar magnetic fields expand over the plasma chamber, beam-formation, beam-extraction and electron dump regions and generate horizontal asymmetry and beam angular deflection partially compensated by mechanical alignment of the front-end. The H$^{-}$ beam is generated via volume and caesiated plasma surface modes, the latter inducing a radial asymmetry characterized by an increased current density close to the plasma electrode surface  2 . Asymmetries affecting the meniscus shape, or its current density have to be simulated via 3D Particle In Cell Monte Carlo (PIC-MC) solvers, such as the Orsay Negative Ion eXtraction code (ONIX)  3 . Validation of these simulations require dedicated measurements. This contribution describes experimental methods newly implemented at CERN’s ion source test stand and initial results for Optical and Beam Emission Spectroscopy (OES, BES), emittance and beam profile measurements. In a later stage, the gathered data sets can be compared to source plasma parameters and extracted beam parameters from PIC-MC simulations, once coupled to the Ion Beam Simulation (IBSimu)  4  beam transport code. The experimental parameter space includes RF-power, density of neutrals, position of the RF coil and extraction field. Beams of H$^{-}$, D$^{-}$ and protons were produced; examples of measured data are presented in this contribution.
002825275 540__ $$3publication$$aCC-BY-3.0$$bIOP$$uhttp://creativecommons.org/licenses/by/3.0/
002825275 65017 $$2SzGeCERN$$aAccelerators and Storage Rings
002825275 690C_ $$aARTICLE
002825275 690C_ $$aCERN
002825275 700__ $$aVnuchenko, A$$uCERN
002825275 700__ $$aBertolo, S$$uCERN
002825275 700__ $$aMastrostefano, C$$uCERN
002825275 700__ $$aO’Neil, M$$uCERN
002825275 700__ $$adi Lorenzo, F$$uCERN
002825275 700__ $$aCoutron, Y$$uCERN
002825275 700__ $$aSteyeart, D$$uCERN
002825275 700__ $$aRiffaud, B$$uCERN
002825275 700__ $$aThiboud, J$$uCERN
002825275 700__ $$aGuida, R$$uCERN
002825275 700__ $$aKapusniak, K$$uCERN
002825275 700__ $$aCharvet, C$$uCERN
002825275 700__ $$aTeissandier, B$$uCERN
002825275 700__ $$aMoyret, P$$uCERN
002825275 700__ $$aRoncarolo, F$$uCERN
002825275 700__ $$aBart Pedersen, S$$uCERN
002825275 700__ $$aDuraffourg, M$$uCERN
002825275 700__ $$aVuitton, C$$uCERN
002825275 700__ $$aFantz, U$$uGarching, Max Planck Inst. Plasmaphys.
002825275 700__ $$aMochalskyy, S$$uGarching, Max Planck Inst. Plasmaphys.
002825275 700__ $$aWunderlich, D$$uGarching, Max Planck Inst. Plasmaphys.
002825275 700__ $$aLindqvist, M$$uGarching, Max Planck Inst. Plasmaphys.
002825275 700__ $$aden Harder, N$$uGarching, Max Planck Inst. Plasmaphys.
002825275 700__ $$aMimo, A$$uGarching, Max Planck Inst. Plasmaphys.
002825275 700__ $$aBriefi, S$$uGarching, Max Planck Inst. Plasmaphys.
002825275 700__ $$aHurlbatt, A$$uGarching, Max Planck Inst. Plasmaphys.
002825275 700__ $$aKalvas, T$$uJyvaskyla U.
002825275 700__ $$aMinea, T$$uLPGP, Orsay
002825275 700__ $$aRevel, A$$uLPGP, Orsay
002825275 773__ $$c012036$$n1$$pJ. Phys. : Conf. Ser.$$v2244$$wC21-09-20.13$$y2022
002825275 8564_ $$82385597$$s728653$$uhttps://cds.cern.ch/record/2825275/files/document.pdf$$yFulltext
002825275 960__ $$a13
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002825275 980__ $$aARTICLE
002825275 980__ $$aConferencePaper