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Title: Measurements of x-ray scattering from accelerator vacuum chamber surfaces, and comparison with an analytical model

This study compares measurements and calculations of scattering of photons from technical vacuum chamber surfaces typical of accelerators. Synchrotron radiation generated by a charged particle beam in the accelerator is either absorbed, specularly reflected, or scattered by the vacuum chamber surface. This phenomenon has important implications on the operation of the accelerator. Measurements of photon scattering were made at the BESSY-II synchrotron radiation facility using samples of aluminum vacuum chamber from Cornell electron storage ring (CESR). A description of the analytic model used in the calculation is given, which takes into account the reflectivity of the material, the surface features of the sample, the wavelengths and the incident angles of the photons. The surface properties used in these calculations were obtained from measurements made from an atomic force microscope.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. Cornell Univ., Ithaca, NY (United States)
  2. National Inst. of Nuclear Physics (INFN), Frascati (Italy). National Lab. of Frascati (INFN-LNF)
  3. KEK, Ibaraki (Japan)
  4. Helmholtz-Zentrum Berlin (HZB), Berlin (Germany)
Publication Date:
Grant/Contract Number:
SC0006505; FC02-08ER41538
Type:
Published Article
Journal Name:
Physical Review Special Topics. Accelerators and Beams
Additional Journal Information:
Journal Volume: 18; Journal Issue: 4; Journal ID: ISSN 1098-4402
Publisher:
American Physical Society (APS)
Research Org:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1182834
Alternate Identifier(s):
OSTI ID: 1454518