Heavy-Ion-Induced Electronic Desorption of Gas from Metals

Journal Article · Fri Feb 09 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.064801· OSTI ID:20955448

Molvik, A W; Covo, M Kireeff; Westenskow, G ^[1]; Kollmus, H; Bellachioma, M C; Bender, M; Kraemer, A ^[2]; Mahner, E ^[3]; Bieniosek, F M; Kwan, J; Seidl, P A ^[1]; Hedlund, E; Westerberg, L ^[4]; Malyshev, O B ^[5]; Prost, L ^[6]

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1. Heavy-Ion Fusion Science Virtual National Laboratory, Berkeley, California 94720 (United States)
2. GSI, Planckstrasse 1, 64291 Darmstadt (Germany)
3. CERN, 1211 Geneva 23 (Switzerland)
4. Uppsala University, 751 21, Uppsala (Sweden)
5. CCLRC Daresbury Laboratory, Warrington (United Kingdom)
6. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

During heavy-ion operation in several particle accelerators worldwide, 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}/dx) of the ions slowing down in matter; but it varies only little with the ion impact angle, unlike electronic sputtering.

• OSTI ID: 20955448
• Journal Information: Physical Review Letters, Vol. 98, Issue 6; Other Information: DOI: 10.1103/PhysRevLett.98.064801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
BNL
CERN
DESORPTION
ENERGY LOSSES
HEAVY IONS
ION BEAMS
LIFETIME
MATTER
SLOWING-DOWN
SPUTTERING