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Title: Optimizing the average longitudinal phase of the beam in the SLC linac

Technical Report ·
DOI:https://doi.org/10.2172/5485189· OSTI ID:5485189

The relation of the beam's average linac phase, {phi}{sub 0}, to the final energy spectrum in the SLC linac has been studied by many people over the years, with much of the work left unpublished. In this note we perform a somewhat thorough in vestigation of the problem. First we describe the calculation method, and discuss some common features of the energy spectrum. Then we calculate the value of {phi}{sub 0} that minimizes {delta}{sub rms} for the conceivable range of bunch population and bunch lengths of the SLC linac. This is followed by luminosity calculations, including the sensitivity of luminosity to variations in {phi}{sub 0}. Finally we suggest a practical method of implementing the proper phase setting on the real machine.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
DOE/ER
DOE Contract Number:
AC03-76SF00515
OSTI ID:
5485189
Report Number(s):
SLAC/AP-76; ON: DE90002803; TRN: 89-031354
Country of Publication:
United States
Language:
English