Cavity beam position monitor system for the Accelerator Test Facility 2

Y.I. Kim, R. Ainsworth, A. Aryshev, S.T. Boogert, G. Boorman, J. Frisch, A Heo, Y. Honda, W. H. Hwang, J Y Huang, E. -S. Kim, S.H Kim, A. Lyapin, T. Naito, J. May, D. McCormick, R.E. Mellor, S. Molloy, J. Nelson, S. J. ParkY.J Park, M. Ross, S Shin, C. Swinson, T. Smith, N. Terunuma, T. Tauchi, J. Urakawa, G.R. White

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The Accelerator Test Facility 2 (ATF2) is a scaled demonstrator system for final focus beam lines of linear high energy colliders. This paper describes the high resolution cavity beam position monitor (BPM) system, which is a part of the ATF2 diagnostics. Two types of cavity BPMs are used, C-band operating at 6.423 GHz, and S-band at 2.888 GHz with an increased beam aperture. The cavities, electronics, and digital processing are described. The resolution of the C-band system with attenuators was determined to be approximately 250 nm and 1  μm for the S-band system. Without attenuation the best recorded C-band cavity resolution was 27 nm.
Original languageEnglish
Article number042801
Number of pages16
JournalPhysical Review Special Topics: Accelerators and Beams
Issue number4
Publication statusPublished - 10 Apr 2012

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