Analysis of a Novel Diffractive Scanning Wire Beam Position Monitor (BPM) for Discriminative Profiling of Electron Vs. X Ray Beams

Conference · Thu Sep 01 00:00:00 EDT 2011 · Conf.Proc.C970512:2192,1997

OSTI ID:1023793

Tatchyn, Roman

Recent numerical studies of Free Electron Lasers (FELs) operating in the Self Amplified Spontaneous Emission (SASE) regime indicate a large sensitivity of the gain to the degree of transverse overlap (and associated phase coherence) between the electron and photon beams traveling down the insertion device. Simulations of actual systems imply that accurate detection and correction for this relative loss of overlap, rather than correction for the absolute departure of the electron beam from a fixed axis, is the preferred function of an FEL amplifier's Beam Position Monitor (BPM) and corrector systems. In this note we propose a novel diffractive BPM with the capability of simultaneously detecting and resolving the absolute (and relative) transverse positions and profiles of electron and x-ray beams co-propagating through an undulator. We derive the equations governing the performance of the BPM and examine its predicted performance for the SLAC Linac Coherent Light Source (LCLS), viz., for profiling multi-GeV electron bunches co-propagating with one-to-several-hundred keV x-ray beams. Selected research and development (r&d) tasks for fabricating and testing the proposed BPM are discussed.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1023793
• Report Number(s): SLAC-REPRINT-2011-037; TRN: US1105071
• Journal Information: Conf.Proc.C970512:2192,1997, Conference: 17th IEEE Particle Accelerator Conference (PAC 97): Accelerator Science, Technology and Applications, 12-16 May 1997, Vancouver, British Columbia, Canada
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
BEAM POSITION
BEAM MONITORING
BEAM PROFILES
CORRECTIONS
DETECTION
ELECTRON BEAMS
ELECTRONS
EMISSION
EQUATIONS
FREE ELECTRON LASERS
LIGHT SOURCES
LINEAR ACCELERATORS
MEETINGS
MONITORS
PERFORMANCE
PHOTON BEAMS
SENSITIVITY
STANFORD LINEAR ACCELERATOR CENTER
TESTING
Accelerators
ACCPHY