skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Design updates of the x-ray beam position monitor for beamline front ends.

Abstract

At the Advanced Photon Source (APS), each insertion device (ID) beamline front end has two x-ray beam position monitors (XBPMs) to monitor the x-ray beam position in both the vertical and horizontal directions. The XBPMs measure photoelectrons generated from the CVD-diamond-based sensory blades and deduce the beam position by comparison of the relative signals from the blades. Using the method proposed by G. Decker, which involves the introduction of a chicane into the accelerator lattice that directs unwanted x-rays away from the photosensitive XBPM blades, the photon source stability has been improved by addition of XBPMs in the storage ring global orbit feedback. In recent years, design updates for the XBPM mechanical structure and geometric configuration have been made to improve its performance. We present these design updates in this paper. Test results of the XBPM design updates are also discussed here.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
967253
Report Number(s):
ANL/AOD/CP-117934
TRN: US0904332
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 9th International Conference on Synchrotron Radiation Instrumentation (SRI 2006); May 26, 2006 - Jun. 2, 2006; Daegu, Korea
Country of Publication:
United States
Language:
ENGLISH
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; ADVANCED PHOTON SOURCE; BEAM POSITION; CONFIGURATION; DESIGN; FEEDBACK; MECHANICAL STRUCTURES; MONITORS; PERFORMANCE; PHOTONS; STABILITY; STORAGE RINGS; SYNCHROTRON RADIATION

Citation Formats

Shu, D., Singh, O., Hahne, M., and Decker, G. Design updates of the x-ray beam position monitor for beamline front ends.. United States: N. p., 2007. Web. doi:10.1063/1.2436234.
Shu, D., Singh, O., Hahne, M., & Decker, G. Design updates of the x-ray beam position monitor for beamline front ends.. United States. doi:10.1063/1.2436234.
Shu, D., Singh, O., Hahne, M., and Decker, G. Mon . "Design updates of the x-ray beam position monitor for beamline front ends.". United States. doi:10.1063/1.2436234.
@article{osti_967253,
title = {Design updates of the x-ray beam position monitor for beamline front ends.},
author = {Shu, D. and Singh, O. and Hahne, M. and Decker, G.},
abstractNote = {At the Advanced Photon Source (APS), each insertion device (ID) beamline front end has two x-ray beam position monitors (XBPMs) to monitor the x-ray beam position in both the vertical and horizontal directions. The XBPMs measure photoelectrons generated from the CVD-diamond-based sensory blades and deduce the beam position by comparison of the relative signals from the blades. Using the method proposed by G. Decker, which involves the introduction of a chicane into the accelerator lattice that directs unwanted x-rays away from the photosensitive XBPM blades, the photon source stability has been improved by addition of XBPMs in the storage ring global orbit feedback. In recent years, design updates for the XBPM mechanical structure and geometric configuration have been made to improve its performance. We present these design updates in this paper. Test results of the XBPM design updates are also discussed here.},
doi = {10.1063/1.2436234},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • At the Advanced Photon Source (APS), each insertion device (ID) beamline front end has two x-ray beam position monitors (XBPMs) to monitor the x-ray beam position in both the vertical and horizontal directions. The XBPMs measure photoelectrons generated from the CVD-diamond-based sensory blades and deduce the beam position by comparison of the relative signals from the blades. Using the method proposed by G. Decker, which involves the introduction of a chicane into the accelerator lattice that directs unwanted x-rays away from the photosensitive XBPM blades, the photon source stability has been improved by addition of XBPMs in the storage ringmore » global orbit feedback. In recent years, design updates for the XBPM mechanical structure and geometric configuration have been made to improve its performance. We present these design updates in this paper. Test results of the XBPM design updates are also discussed here.« less
  • A new beam profile monitoring system for the small X-ray beam exiting from the SPring-8 front-end was developed and tested at BL13XU. This system is intended as a screen monitor and also as a position monitor even at beam currents of 100 mA by using photoluminescence of a chemical vapor deposition-grown diamond film. To cope with the challenge that the spatial distribution of the photoluminescence in the vertical direction is too flat to detect the beam centroid within a limited narrow aperture, a filter was installed that absorbs the fundamental harmonic concentrated in the beam center, which resulted in “de-flattening”more » of the vertical distribution. For the measurement, the filter crossed the photon beam vertically at high speed to withstand the intense heat flux of the undulator pink-beam. A transient thermal analysis, which can simulate the movement of the irradiation position with time, was conducted to determine the appropriate configuration and the required moving speed of the filter to avoid accidental melting. In a demonstration experiment, the vertically separated beam profile could be successfully observed for a 0.8 × 0.8 mm{sup 2} beam shaped by an XY slit and with a fundamental energy of 18.48 keV. The vertical beam centroid could be detected with a resolution of less than 0.1 mm.« less
  • A compact filter/mask/window assembly has been designed for undulator beamline commissioning activity at the Advanced Photon Source beamlines. The assembly consists of one 300-{mu}m graphite filter, one 127-{mu}m CVD diamond filter and two 250-{mu}m beryllium windows. A water-cooled Glidcop fixed mask with a 4.5-mm {times} 4.5-mm output optical aperture and a 0.96-mrad {times} 1.6-mrad beam missteering acceptance is a major part in the assembly. The CVD diamond filter which is mounted on the downstream side of the fixed mask is designed to also function as a transmitting x-ray beam position monitor. The sum signal from the latter can be usedmore » to monitor the physical condition of the graphite filter and prevent any possible chain reaction damage to the beryllium windows downstream. In this paper, the design concept as well as the detailed structural design of the commissioning window are presented. Further applications of the commissioning window commissioning window components are also discussed.« less
  • No abstract prepared.