002694239 001__ 2694239
002694239 003__ SzGeCERN
002694239 005__ 20220405164710.0
002694239 0247_ $$2DOI$$9JACoW$$a10.18429/JACoW-IPAC2019-MOPTS099
002694239 0248_ $$aoai:inspirehep.net:1745020$$pcerncds:CERN:FULLTEXT$$pcerncds:FULLTEXT$$pcerncds:CERN$$qINSPIRE:HEP$$qForCDS
002694239 035__ $$9http://inspirehep.net/oai2d$$aoai:inspirehep.net:1745020$$d2019-10-18T10:50:04Z$$h2019-10-19T04:00:10Z$$mmarcxml
002694239 035__ $$9Inspire$$a1745020
002694239 041__ $$aeng
002694239 088__ $$aCERN-ACC-2019-170
002694239 100__ $$aPerini, [email protected]$$uCERN
002694239 245__ $$9JACoW$$aThe development programme of cathodes and electron guns for the hollow electron lenses of the High Luminosity LHC project
002694239 260__ $$c2019
002694239 300__ $$a4 p
002694239 500__ $$aThis manuscript has been co-authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics.
002694239 520__ $$9JACoW$$aThe High Luminosity LHC project (HL-LHC) foresees the construction and installation of important new equipment to increase the performance of the LHC machine. The Hollow Electron Lens (HEL) is a promising system to control the beam halo. It improves the beam collimation system of the HL-LHC and mitigates possible equipment damage in case of failure scenarios from halo losses. The halo can store up to 30 MJ energy. The specifications for this new device are quite demanding. The source, an electron gun with an annular shaped cathode, has to deliver a current up to 5 A. This is five times higher than the current in the existing electron lenses in Fermi and Brookhaven national laboratories. This note describes the programme carried out to design and test high-perveance guns equipped with two types of high-performance scandate cathodes. The size of the final gun is now considerably smaller than the one of the first prototype, allowing a reduction of diameter and cost of the superconducting magnet system used to steer the electron beam. The tests carried out at FNAL, BVERI and BJUT demonstrated that the developed cathodes fulfil the specifications and can supply a 5 A fully Space Charge Limited (SCL) current.
002694239 540__ $$3Preprint$$aCC-BY-3.0$$bJACoW$$uhttp://creativecommons.org/licenses/by/3.0/
002694239 65017 $$2SzGeCERN$$aAccelerators and Storage Rings
002694239 6531_ $$2JACoW$$acathode
002694239 6531_ $$2JACoW$$aelectron
002694239 6531_ $$2JACoW$$agun
002694239 6531_ $$2JACoW$$aluminosity
002694239 6531_ $$2JACoW$$aproton
002694239 690C_ $$aCERN
002694239 693__ $$aCERN HL-LHC
002694239 700__ $$aCrawford, Darren$$iINSPIRE-00417001$$jORCID:0000-0003-1092-0049$$jJACoW-00057344$$uFermilab
002694239 700__ $$aFeng, [email protected]$$uVacuum Elect. Res. Inst., Beijing
002694239 700__ $$aGobbi, [email protected]$$uCERN
002694239 700__ $$aLi, [email protected]$$uVacuum Elect. Res. Inst., Beijing
002694239 700__ $$aLiu, [email protected]$$uBeijing U. of Tech.
002694239 700__ $$aRuan, Jinhao$$iINSPIRE-00526585$$jJACoW-00028289$$uFermilab
002694239 700__ $$aShao, [email protected]$$uVacuum Elect. Res. Inst., Beijing
002694239 700__ $$aStancari, Giulio$$jJACoW-00004210$$jORCID:[email protected]$$uFermilab
002694239 700__ $$aValerio, Linda$$iINSPIRE-00528139$$jJACoW-00012505$$jORCID:0000-0002-3621-3978$$uFermilab
002694239 700__ $$aWang, [email protected]$$uBeijing U. of Tech.
002694239 700__ $$aWang, [email protected]$$uBeijing U. of Tech.
002694239 700__ $$aYang, [email protected]$$uBeijing U. of Tech.
002694239 700__ $$aZhang, [email protected]$$uVacuum Elect. Res. Inst., Beijing
002694239 773__ $$cMOPTS099$$qIPAC2019$$wC19-05-19.1$$y2019
002694239 8564_ $$81524520$$s1589312$$uhttps://cds.cern.ch/record/2694239/files/mopts099.pdf$$yPreprint
002694239 960__ $$a13
002694239 962__ $$b2672790$$kMOPTS099$$nmelbourne20190519
002694239 980__ $$aARTICLE
002694239 980__ $$aConferencePaper
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002694239 999C5 $$9refextract$$hG. Stancari et al.$$mCERN, Geneva, Switzerland, Rep$$mMay$$o3$$rCERN-ACC-2014-0248$$tConceptual design of hollow electron lenses for beam halo control in the Large Hadron Collider$$x[3] G. Stancari et al., “Conceptual design of hollow electron lenses for beam halo control in the Large Hadron Collider”, CERN, Geneva, Switzerland, Rep.CERN-ACC-2014-0248, May 2014.$$y2014
002694239 999C5 $$9refextract$$adoi:10.18429/JACoW-IPAC2015-WEBB1$$hS. Redaelli et al.$$min Proc. IPAC'15, Richmond, VA, USA, May, pp. 2462-2465$$o4$$tPlans for Deployment of Hollow Electron Lenses at the LHC for Enhanced Beam Collimation$$x[4] S. Redaelli et al., “Plans for Deployment of Hollow Electron Lenses at the LHC for Enhanced Beam Collimation”, in Proc. IPAC'15, Richmond, VA, USA, May 2015, pp. 2462-2465. doi:10.18429/JACoW-IPAC2015-WEBB1$$y2015
002694239 999C5 $$9refextract$$adoi:10.18429/JACoW-IPAC2015-THPF059$$hX. Gu et al.$$min Proc. IPAC'15, Richmond, VA, USA, May, pp. 3830-3832$$mThis is a preprint — the final version is published with$$o5$$tRHIC Electron Lenses Upgrades$$x[5] X. Gu et al., “RHIC Electron Lenses Upgrades”, in Proc. IPAC'15, Richmond, VA, USA, May 2015, pp. 3830-3832. doi:10.18429/JACoW-IPAC2015-THPF059 This is a preprint — the final version is published with IOP$$y2015
002694239 999C5 $$9refextract$$9CURATOR$$hA. Valishev, G. F. Kuznetsov, A. L. Romanov, V. D. Shiltsev, G. Stancari, and X. Zhang$$min Proc. IPAC'10, Kyoto, Japan, May, paper TUPD070, pp. 2084-2086$$o6$$rFERMILAB-CONF-10-137-AD-APC$$tProgress with Tevatron Electron Lens Head-on Beam-Beam Compensation$$x[6] A. Valishev, G. F. Kuznetsov, A. L. Romanov, V. D. Shiltsev, G. Stancari, and X. Zhang, “Progress with Tevatron Electron Lens Head-on Beam-Beam Compensation”, in Proc. IPAC'10, Kyoto, Japan, May 2010, paper TUPD070, pp. 2084-2086.$$y2010
002694239 999C5 $$9CURATOR$$9refextract$$hS. Li, G. Stancari$$mPC$$o7$$rFERMILAB-TM-2542-APC$$tCharacterization of an Electron Gun for Hollow Electron Beam Collimation$$x[7] S. Li, G. Stancari, “Characterization of an Electron Gun for Hollow Electron Beam Collimation”, FERMILAB-TM2542-APC.
002694239 999C5 $$01690337$$9refextract$$9CURATOR$$hY. Yang, Y. Wang, W. Liu, Z. Pan, J. Li, J. Wang, D. Perini$$mIVEC, Monterey, California, April 24th -26th$$o8$$tNano-sized Scandia Doped Dispenser Cathode with Annular Shape for the Hollow Electron Lenses for CERN High Luminosity LHC project$$x[8] Y. Yang, Y. Wang, W. Liu, Z. Pan, J. Li, J. Wang, D. Perini, “Nano-sized Scandia Doped Dispenser Cathode with Annular Shape for the Hollow Electron Lenses for CERN High Luminosity LHC project”, IVEC 2018, Monterey, California, April 24th -26th 2018.$$y2018