CERN's Linac4 H - sources: Status and operational results

J. Lettry, D. Aguglia, J. Alessi, P. Andersson, S. Bertolo, A. Butterworth, Y. Coutron, A. Dallocchio, N. David, E. Chaudet, D. Fink, J. Gil-Flores, M. Garlasche, A. Grudiev, R. Guida, J. Hansen, M. Haase, A. Hatayama, A. Jones, I. KoszarT. Lehn, C. Machado, C. Mastrostefano, S. Mathot, S. Mattei, O. Midttun, P. Moyret, D. Nisbet, K. Nishida, M. O'Neil, M. Paoluzzi, J. Sanchez Alvarez, R. Scrivens, T. Shibata, D. Steyaert, N. Thaus, A. Zelenski

研究成果: Conference contribution

18 被引用数 (Scopus)

抄録

Two volume sources equipped with DESY and CERN plasma generators and a low voltage electron dump were operated at 45 kV in the Linac4 tunnel and on a dedicated test stand. These volume sources delivered approximately 20 mA and ensured the commissioning of the Radio Frequency Quadrupole accelerator and of the first section of the Drift Tube Linac. CERN's prototype of a cesiated surface source equipped with this electron dump was operated continuously from November 2013 to April 2014 on the ion source test stand and is being commissioned in the Linac4 tunnel. Before cesiation, the prototype conditioned in volume mode provided up to 30 mA H - beam. Short cesiations, of the order of 10 mg effectively reduced the intensity of co-extracted electrons down to 2 - 8 times the H - current; this cesiated surface operation mode delivered up to 60 mA H - beam. An H - beam of the order of 40 mA was sustained up to four weeks operation with 500 μs pulses at 1.2s spacing. A new extraction was designed to match these beam properties. A copy of BNL's magnetron produced at CERN was tested at BNL and delivered at 40 kV H - beam exceeding Linac4's nominal intensity of 80 mA. In this contribution, the performances, dynamic response to cesiation, stability and availability of these prototypes are described. The needed optimization of the emittance of H - beam above 40 mA is presented, which requires an evolution of the front end that encompasses implementation of a large ceramic insulator.

本文言語English
ホスト出版物のタイトル4th International Symposium on Negative Ions, Beams and Sources, NIBS 2014
編集者Werner Kraus, Paul McNeely
出版社American Institute of Physics Inc.
ISBN(電子版)9780735412972
DOI
出版ステータスPublished - 2015 4 8
外部発表はい
イベント4th International Symposium on Negative Ions, Beams and Sources, NIBS 2014 - Garching, Germany
継続期間: 2014 10 62014 10 10

出版物シリーズ

名前AIP Conference Proceedings
1655
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Conference

Conference4th International Symposium on Negative Ions, Beams and Sources, NIBS 2014
国/地域Germany
CityGarching
Period14/10/614/10/10

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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