Numerical and experimental investigation of the contamination of X-ray beam position monitors by bending magnet edge

Authors: Christopher Bloomer (Diamond Light Source) , Guenther Rehm (Diamond Light Source) , Cyrille Thomas (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: 11th European Particle accelerator conference (EPAC08))
Peer Reviewed: No

State: Published (Approved)
Published: June 2008

Abstract: The details of an investigation into bending magnet edge radiation at Diamond are discussed, reviewing the ef- fects of this radiation on X-ray Beam Position Monitoring (XBPM) equipment. For some time it has been recognized that there are difficulties using XBPMs for determining the centre of mass position of an undulator beam due to con- tamination from bending magnet radiation. While the ge- ometry of the XBPM blades is designed to help reduce background dipole interference, this radiation is known to account for approximately 1% of the signal received, skew- ing the calculated beam position by several micrometres. We made detailed models of the bending magnet edge radi- ation using the SRW program and used MatLab to analyse the data. We present this model and compare our prediction to experimental results obtained at Diamond.

Journal Keywords: Diamond Light Source ; Bending Magnet Edge Radiation ; Xbpm Equipment

Subject Areas: Physics

Technical Areas: Magnets

Added On: 26/08/2010 08:58

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