Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.u5001p&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
The saw-tooth instability was a poorly understood phenomenon that occurred during operation of the SLC damping rings above some single bunch current threshold. To measure and understand the effect, novel instrumentation was developed to resolve the instability-induced structure on ~cm long bunches. Measurements using both these diagnostics and a fast streak camera gave some clues to the basic mechanism of the instability and allowed us to quantify the instability's affect on SLC performance. They also revealed some striking nonlinear features of the instability including, for instance, an abrupt transition between different unstable modes in the longitudinal beam phase space that occurred at some value of current. This talk will describe the instrumentation and present the main experimental results. It will also touch on the theoretical developments and discuss applications beyond the SLC damping rings.
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