Phys. Rev. ST Accel. Beams 3, 050701 (2000) [14 pages]Improvement in the beam lifetime by means of an rf phase modulation at the KEK Photon Factory storage ring
Shogo Sakanaka, Masaaki Izawa, Toshiyuki Mitsuhashi, and Takeshi Takahashi Received 28 February 2000; published 10 May 2000 In the 2.5-GeV Photon Factory storage ring at KEK, we have found that the beam lifetime can be improved by modulating the phase of an rf accelerating voltage at a frequency of 2 times the synchrotron oscillation frequency. By applying this phase modulation with a peak-to-peak amplitude of 3.2°, the beam lifetime could be improved, typically, from 22 to 36 h under a beam current of about 360 mA. At the same time, the longitudinal coupled-bunch instability could be considerably suppressed. The improvement in the beam lifetime can be explained as an improved Touschek lifetime, which was caused by a quadrupole-mode longitudinal oscillation of the stored bunches. ©2000 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevSTAB.3.050701 [ Abstract | Previous article | Next article | Issue 5 ] |
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