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Title: GTF Transverse and Longitudinal Emittance Data Analysis Technique

The SSRL Gun Test Facility (GTF) was built to develop a high brightness electron injector for the LCLS and has been operational since 1996. Measurements at the GTF include quadrupole scan transverse emittance measurements and linac phase scan longitudinal emittance measurements. Typically the beam size is measured on a screen as a function of a quadrupole current or linac phase and the beam matrix is then fit to the measured data. Often the emittance which is the final result of the measurement is the only number reported. However, the method used to reduce the data to the final emittance value can have a significant effect on the result. This paper describes in painful detail the methods used to analyze the transverse and longitudinal emittance data collected at the GTF.
Publication Date:
OSTI Identifier:
1000322
Report Number(s):
SLAC-TN-10-078
TRN: US1100084
DOE Contract Number:
AC02-76SF00515
Resource Type:
Technical Report
Research Org:
SLAC National Accelerator Laboratory (SLAC)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 97 MATHEMATICAL METHODS AND COMPUTING; TEST FACILITIES; ELECTRON GUNS; ELECTRON BEAM INJECTION; LIGHT SOURCES; FREE ELECTRON LASERS; LINEAR ACCELERATORS; BRIGHTNESS; DATA ANALYSIS; QUADRUPOLES; BEAM EMITTANCE XFEL