Heavy-ion induced electronic desorption of gas from metals

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During heavy ion operation in several particle accelerators world-wide, dynamic pressure rises of orders of magnitude were triggered by lost beam ions that bombarded the vacuum chamber walls. This ion-induced molecular desorption, observed at CERN, GSI, and BNL, can seriously limit the ion beam lifetime and intensity of the accelerator. From dedicated test stand experiments we have discovered that heavy-ion induced gas desorption scales with the electronic energy loss (dE{sub e}/d/dx) of the ions slowing down in matter; but it varies only little with the ion impact angle, unlike electronic sputtering.

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PDF-file: 13 pages; size: 1.5 Mbytes

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Molvik, A W; Kollmus, H; Mahner, E; Covo, M K; Bellachioma, M C; Bender, M et al. December 19, 2006.

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During heavy ion operation in several particle accelerators world-wide, dynamic pressure rises of orders of magnitude were triggered by lost beam ions that bombarded the vacuum chamber walls. This ion-induced molecular desorption, observed at CERN, GSI, and BNL, can seriously limit the ion beam lifetime and intensity of the accelerator. From dedicated test stand experiments we have discovered that heavy-ion induced gas desorption scales with the electronic energy loss (dE{sub e}/d/dx) of the ions slowing down in matter; but it varies only little with the ion impact angle, unlike electronic sputtering.

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PDF-file: 13 pages; size: 1.5 Mbytes

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  • Journal Name: Physical Review Letters, vol. 98, N/A, February 9, 2007, pp. 064801; Journal Volume: 98

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  • Report No.: UCRL-JRNL-226935
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 902329
  • Archival Resource Key: ark:/67531/metadc880474

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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.

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  • December 19, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 7, 2016, 3:13 p.m.

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Molvik, A W; Kollmus, H; Mahner, E; Covo, M K; Bellachioma, M C; Bender, M et al. Heavy-ion induced electronic desorption of gas from metals, article, December 19, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc880474/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.