KEKB beam collision stability at the picosecond timing and micron position resolution as observed with the Belle detector

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Published 31 March 2010 • Published under licence by IOP Publishing Ltd
, , Citation H Kichimi et al 2010 JINST 5 P03011 DOI 10.1088/1748-0221/5/03/P03011

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Author affiliations

1 High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 Japan

2 Department of Physics and Astronomy, University of Hawaii, Honolulu, 96822 USA

Dates

  1. Received 13 January 2010
  2. Accepted 16 February 2010
  3. Published

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1748-0221/5/03/P03011

Abstract

Using the Belle detector we study the characteristics of beam collisions at the KEKB 3.5 GeV e+ on 8 GeV e−asymmetric energy collider. We investigate the collision timingtIP and its z-coordinate along the beam axis zIP as a function of the position of the colliding bunch in a beam train. The various tIP and zIP behaviors observed by Belle are attributed to beam loading effects in the radio frequency cavities that accelerate the beams with a beam abort gap. We report these results in detail and discuss the prospects for the SuperKEKB collider.

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