Radiation Protection Studies for LCLS Tune Up Dump

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The Linac Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center is a pioneer fourth generation hard x-ray free electron laser that shall start to deliver laser pulses in 2009. Among other components of LCLS that present radiation protection concerns, the tune up dump (tdund) is of special interest because it also constitutes an issue for machine protection, as it is placed close to radiation sensitive components, like electronic devices and permanent magnets in the undulators. This paper first introduces the stopper of tdund looking at the heat load, and then it describes the shielding around the dump necessary ... continued below

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4 pages

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Santana-Leitner, M.; Fass, A.; Mao, S.; Nuhn, H.D.; /SLAC; Roesler, S. et al. April 29, 2010.

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Description

The Linac Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center is a pioneer fourth generation hard x-ray free electron laser that shall start to deliver laser pulses in 2009. Among other components of LCLS that present radiation protection concerns, the tune up dump (tdund) is of special interest because it also constitutes an issue for machine protection, as it is placed close to radiation sensitive components, like electronic devices and permanent magnets in the undulators. This paper first introduces the stopper of tdund looking at the heat load, and then it describes the shielding around the dump necessary to maintain the prompt and residual dose within design values. Next, preliminary comparisons of the magnetization loss in a dedicated on-site magnet irradiation experiment with FLUKA simulations serve to characterize the magnetic response to radiation of magnets like those of LCLS. The previous knowledge, together with the limit for the allowed demagnetization, are used to estimate the lifetime of the undulator. Further simulations provide guidelines on which lifetime can be expected for an electronic device placed at a given distance of tdund.

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4 pages

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  • Journal Name: Submitted to Nuclear Technology; Conference: Presented at11th International Conference on Radiation Shielding, Pine Mountain, Georgia, 4/13/2008-4/19/2008

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  • Report No.: SLAC-PUB-14020
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 979033
  • Archival Resource Key: ark:/67531/metadc928503

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • April 29, 2010

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Feb. 17, 2017, 6:36 p.m.

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Santana-Leitner, M.; Fass, A.; Mao, S.; Nuhn, H.D.; /SLAC; Roesler, S. et al. Radiation Protection Studies for LCLS Tune Up Dump, article, April 29, 2010; United States. (digital.library.unt.edu/ark:/67531/metadc928503/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.