Time-resolved measurements of desorbed gas during 1-MeV K + pulsed beam deposition in a stainless steel target

Measurements were made of the density, species, and velocity of the desorbed gas cloud on intense K+ beam bombardment of a stainless steel target. Residual gas analyzer measurements indicate that the gas cloud consists of predominantly H2 . Energy analyzer measurements of doubly ionized beam ions sh...

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Bibliographic Details
Published in:Physical review special topics. PRST-AB. Accelerators and beams 2007-09, Vol.10 (9), p.093201, Article 093201
Main Authors: Bieniosek, F. M., Prost, L. R., Seidl, P. A., Molvik, A. W., Covo, M. Kireeff
Format: Article
Language:English
Subjects:
Clouds
Density
Gas analyzers
Optical measurement
Residual gas
Stainless steel
Stainless steels
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Summary:Measurements were made of the density, species, and velocity of the desorbed gas cloud on intense K+ beam bombardment of a stainless steel target. Residual gas analyzer measurements indicate that the gas cloud consists of predominantly H2 . Energy analyzer measurements of doubly ionized beam ions show that the ratio of hydrogen gas production to beam density was approximately 3000molecules/ion at normal incidence. Optical measurements of the evolution of the gas cloud during the beam pulse show a distribution with an average expansion velocity of about 0.5mm/μs . Comparison is made with a simple model of the gas cloud behavior.
ISSN:1098-4402
1098-4402
2469-9888
DOI:10.1103/PhysRevSTAB.10.093201