Experimental investigation of plasma impedance in Linac4 H- source

K. Nishida, S. Mattei, S. Briefi, A. Butterworth, A. Grudiev, M. Haase, A. Jones, M. M. Paoluzzi, G. Voulgarakis, A. Hatayama, J. Lettry

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

CERN 's new particle accelerator Linac4 is part of the upgrade of the LHC accelerator chain. Linac4 is required to deliver 160 MeV H- beam to improve the beam brightness and luminosity in the Large Hadron Collider (LHC). The Linac4 H- source must deliver 40-50 mA, 45 keV H- beam in the RFQ acceptance. Since the RF power coupled to the H- source plasma is one of the important parameters that determines the quality of the H- beam, the experimental investigation of the dependence of the load impedance on the operational parameters is mandatory. In this study, we have measured the impedance of the H- source plasma varying the RF power coupled to the plasma and the condition of the hydrogen gas. Also, optical emission spectroscopy (OES) measurements have been carried out simultaneously with the impedance measurement in order to determine the plasma parameters. The determination of the plasma parameters allows us to compare the experimental results with the analytic model of the plasma parameters, which is useful to discuss the results from a physical point of view.

本文言語English
ホスト出版物のタイトル5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016
編集者Dan Faircloth
出版社American Institute of Physics Inc.
ISBN(電子版)9780735415492
DOI
出版ステータスPublished - 2017 8月 9
イベント5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016 - Oxford, United Kingdom
継続期間: 2016 9月 122016 9月 16

出版物シリーズ

名前AIP Conference Proceedings
1869
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

Other5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016
国/地域United Kingdom
CityOxford
Period16/9/1216/9/16

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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