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Picosecond Bunch Length and Energy-z Correlation Measurements at SLAC's A-Line and End Station A.

DE2008910203

Publication Date	2007
Personal Author	Molloy, S.; McCormick, D.; Blackmore, V.; Watson, S.; Rpss, M.
Page Count	5
Abstract	We report on measurements of picosecond bunch lengths and the energy-z correlation of the bunch with a high energy electron test beam to the A-line and End Station A (ESA) facilities at SLAC. The bunch length and the energy-z correlation of the bunch are measured at the end of the linac using a synchrotron light monitor diagnostic at a high dispersion point in the A-line and a transverse RF deflecting cavity at the end of the linac. Measurements of the bunch length in ESA were made using high frequency diodes (up to 100 GHz) and pyroelectric detectors at a ceramic gap in the beamline. Modelling of the beams longitudinal phase space through the linac and A-line to ESA is done using the 2-dimensional tracking program LiTrack, and LiTrack simulation results are compared with data. High frequency diode and pyroelectric detectors are planned to be used as part of a bunch length feedback system for the LCLS FEL at SLAC. The LCLS also plans precise bunch length and energy-z correlation measurements using transverse RF deflecting cavities.
Keywords	Beam bunching Accelerators Correlations Electron beams Synchrotrons Superconducting cavity resonators Diodes Detectors Feedback Rf systems Diagnostic techniques
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200818
Contract Number	W-7405-ENG-48

Picosecond Bunch Length and Energy-z Correlation Measurements at SLAC's A-Line and End Station A.

Picosecond Bunch Length and Energy-z Correlation Measurements at SLAC's A-Line and End Station A.
DE2008910203

Publication Date	2007
Personal Author	Molloy, S.; McCormick, D.; Blackmore, V.; Watson, S.; Rpss, M.
Page Count	5
Abstract	We report on measurements of picosecond bunch lengths and the energy-z correlation of the bunch with a high energy electron test beam to the A-line and End Station A (ESA) facilities at SLAC. The bunch length and the energy-z correlation of the bunch are measured at the end of the linac using a synchrotron light monitor diagnostic at a high dispersion point in the A-line and a transverse RF deflecting cavity at the end of the linac. Measurements of the bunch length in ESA were made using high frequency diodes (up to 100 GHz) and pyroelectric detectors at a ceramic gap in the beamline. Modelling of the beams longitudinal phase space through the linac and A-line to ESA is done using the 2-dimensional tracking program LiTrack, and LiTrack simulation results are compared with data. High frequency diode and pyroelectric detectors are planned to be used as part of a bunch length feedback system for the LCLS FEL at SLAC. The LCLS also plans precise bunch length and energy-z correlation measurements using transverse RF deflecting cavities.
Keywords	Beam bunching Accelerators Correlations Electron beams Synchrotrons Superconducting cavity resonators Diodes Detectors Feedback Rf systems Diagnostic techniques
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200818
Contract Number	W-7405-ENG-48