Long-lifetime, low-contamination metal beam dumps for NIF spatial filters

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Description

The management of back reflections and leakage through the Pockels cell and polarizer switch in the National Ignition Facility (NIF) beamlines requires robust beam dumps that can operate unattended for thousands of shots within the confines of the vacuum spatial filters. Off-line experiments and modeling have been used to investigate the use of metal for these beam dumps. We conclude that a stainless steel beam dump will have sufficient lifetime and will safely absorb fluences in the required range, from 1 J/cm{sup 2} to 4 kJ/cm{sup 2}, at 1 {micro}m.

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Boley, C D; Murray, J E; Neeb, K; Norton, M A & Sinz, K October 30, 1998.

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The management of back reflections and leakage through the Pockels cell and polarizer switch in the National Ignition Facility (NIF) beamlines requires robust beam dumps that can operate unattended for thousands of shots within the confines of the vacuum spatial filters. Off-line experiments and modeling have been used to investigate the use of metal for these beam dumps. We conclude that a stainless steel beam dump will have sufficient lifetime and will safely absorb fluences in the required range, from 1 J/cm{sup 2} to 4 kJ/cm{sup 2}, at 1 {micro}m.

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  • Third Annual International Conference on Solid State Lasers for Application (SSLA) to Inertial Confinement Fusion (ICF), Monterey, CA (US), 06/07/1998--06/12/1998

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  • Report No.: UCRL-JC-129768
  • Report No.: DP0212000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14698
  • Archival Resource Key: ark:/67531/metadc626858

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  • October 30, 1998

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 1:36 p.m.

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Boley, C D; Murray, J E; Neeb, K; Norton, M A & Sinz, K. Long-lifetime, low-contamination metal beam dumps for NIF spatial filters, article, October 30, 1998; California. (digital.library.unt.edu/ark:/67531/metadc626858/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.