DIPAC2011 - List of Authors (Lyapin, A.)

Paper

Title

Page

Cavity BPM System for ATF2

23

A. Lyapin, R. Ainsworth, S.T. Boogert, G.E. Boorman, F.J. Cullinan, N.Y. Joshi
JAI, Egham, Surrey, United Kingdom
A.S. Aryshev, Y. Honda, T. Tauchi, N. Terunuma, J. Urakawa
KEK, Ibaraki, Japan
J.C. Frisch, D.J. McCormick, J. Nelson, T.J. Smith, G.R. White
SLAC, Menlo Park, California, USA
A. Heo, E.-S. Kim, H.-S. Kim, Y.I. Kim
KNU, Deagu, Republic of Korea
M.C. Ross
Fermilab, Batavia, USA

In this paper we summarise our 2-year experience operating the Cavity Beam Position Monitor (CBPM) system at the Accelerator Test Facility (ATF) in KEK. The system currently consists of 41 C and S-band CBPMs and is the main diagnostic tool for the new ATF2 extraction beamline. We concentrate on issues related to the scale of the system and also consider long-term effects, most of which are undetectable or insignificant in smaller experimental prototype systems. We consistently show sub-micron BPM resolutions and week-to-week scale drifts of an order of 1%.

Slides MOOC02 [2.075 MB]

MOPD13

Mode Selective Waveguide BPM

65

A. Lyapin
JAI, Egham, Surrey, United Kingdom

I propose a mode-selective waveguide Beam Position Monitor (BPM). It uses waveguide couplers arranged at the beampipe to create boundary conditions similar to those in slot-coupled cavity BPMs. This structure allows to couple to the differential waveguide mode co-propagating with the beam, and reject the usually much stronger monopole component of the field. As the full dynamic range of the processing electronics can be used for position measurements, and a waveguide is a native high-pass filter, such a BPM is expected to outperform stripline and button BPMs in terms of both spacial and time resolution. In this paper I give some details on the basic principle and the first simulation results and discuss possible ways of signal processing.

Poster MOPD13 [3.052 MB]

Paper	Title	Page
MOOC02	Cavity BPM System for ATF2	23
	A. Lyapin, R. Ainsworth, S.T. Boogert, G.E. Boorman, F.J. Cullinan, N.Y. Joshi JAI, Egham, Surrey, United Kingdom A.S. Aryshev, Y. Honda, T. Tauchi, N. Terunuma, J. Urakawa KEK, Ibaraki, Japan J.C. Frisch, D.J. McCormick, J. Nelson, T.J. Smith, G.R. White SLAC, Menlo Park, California, USA A. Heo, E.-S. Kim, H.-S. Kim, Y.I. Kim KNU, Deagu, Republic of Korea M.C. Ross Fermilab, Batavia, USA
	In this paper we summarise our 2-year experience operating the Cavity Beam Position Monitor (CBPM) system at the Accelerator Test Facility (ATF) in KEK. The system currently consists of 41 C and S-band CBPMs and is the main diagnostic tool for the new ATF2 extraction beamline. We concentrate on issues related to the scale of the system and also consider long-term effects, most of which are undetectable or insignificant in smaller experimental prototype systems. We consistently show sub-micron BPM resolutions and week-to-week scale drifts of an order of 1%.
	Slides MOOC02 [2.075 MB]

MOPD13	Mode Selective Waveguide BPM	65
	A. Lyapin JAI, Egham, Surrey, United Kingdom
	I propose a mode-selective waveguide Beam Position Monitor (BPM). It uses waveguide couplers arranged at the beampipe to create boundary conditions similar to those in slot-coupled cavity BPMs. This structure allows to couple to the differential waveguide mode co-propagating with the beam, and reject the usually much stronger monopole component of the field. As the full dynamic range of the processing electronics can be used for position measurements, and a waveguide is a native high-pass filter, such a BPM is expected to outperform stripline and button BPMs in terms of both spacial and time resolution. In this paper I give some details on the basic principle and the first simulation results and discuss possible ways of signal processing.
	Poster MOPD13 [3.052 MB]