Longitudinal beam-transfer-function measurements at the SLC damping rings Page: 1 of 6
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pt 6 1997 Cov F- 70 5D3- /
O S TI SLAC-PUB-7467
May 1997
Longitudinal Beam-Transfer-Function Measurements
at the SLC Damping Rings*
M.G. Minty and F. Zinunermann
Stanford Linear Accelerator Center
Stanford University, Stanford, CA 94309, USA
A longitudinal single-bunch instability in the damping rings at
the Stanford Linear Collider (SLC) is thought to contribute to
pulse-to-pulse orbit variations in downstream accelerator sec-
tions. To better understand this instability, we measured the
beam phase and bunch length under harmonic modulations of
the rf phase and rf voltage. For small phase-modulations the
measured response can be explained by interaction of the beam
with the cavity fundamental mode. For larger excitations, we
observed bifurcation and hysteresis effects. The response to an
rf voltage modulation revealed two peaks near the quadrupole-
mode frequency, one of which appears to be related to the lon-
gitudinal instability. In this paper we present the experimental
results.
Presented at the 17th IEEE Particle Accelerator Conference (PAC 97); Accelerator Science,
Technology and Applications, Vancouver, British Columbia, Canada, May 12-16, 1997
*Work supported by the U.S. Department of Energy contract DE-AC03-76SF00515.
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Minty, M. G. & Zimmermann, F. Longitudinal beam-transfer-function measurements at the SLC damping rings, report, May 1, 1997; Menlo Park, California. (https://digital.library.unt.edu/ark:/67531/metadc696841/m1/1/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.