The Development Programme of Cathodes and Electron Guns for the Hollow Electron Lenses of the High Luminosity LHC Project

Perini, Diego; Crawford, Darren; Feng, Jinjun; Gobbi, Giorgia; Li, Zepeng; Liu, Wei; Ruan, Jinhao; Shao, Wensheng; Stancari, Giulio; Valerio, Linda; Wang, Jinshu; Wang, Yiman; Yang, Yunfei; Zhang, Ke

doi:10.18429/JACoW-IPAC2019-MOPTS099

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RIS citation export for MOPTS099: The Development Programme of Cathodes and Electron Guns for the Hollow Electron Lenses of the High Luminosity LHC Project

TY  - CONF
AU  - Perini, D.
AU  - Crawford, D.J.
AU  - Feng, J.
AU  - Gobbi, G.
AU  - Li, Z.
AU  - Liu, W.
AU  - Ruan, J.
AU  - Shao, W.
AU  - Stancari, G.
AU  - Valerio, L.R.
AU  - Wang, J.
AU  - Wang, Y.
AU  - Yang, Y.
AU  - Zhang, K.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - The Development Programme of Cathodes and Electron Guns for the Hollow Electron Lenses of the High Luminosity LHC Project
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The 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.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1102
EP  - 1105
KW  - cathode
KW  - electron
KW  - gun
KW  - luminosity
KW  - proton
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPTS099
UR  - http://jacow.org/ipac2019/papers/mopts099.pdf
ER  -