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OUTGASSING OF HYDROGEN M. Leisch

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Institute of Solid State Physics<br />

Reduction of outgassing<br />

Is essential for obtaining ultimate pressures<br />

1. Decreasing the H Concentration:<br />

-- Bakeout and high temperature bakeout (vacuum firing)<br />

2. Hindering H Desorption from the Surface:<br />

– Treatments to produce barrier layer on the surface: air bakeout<br />

– Passive coatings on the surface<br />

– Active coatings (NEG)<br />

[1] P. A. Redhead: Extreme high vacuum, CERN Report No 99-05, 213 (1999)<br />

[2] R. Dobrozemsky: Our present understanding of outgassing, EVC-9, Paris (2005)<br />

Professor Manfred <strong>Leisch</strong> Horst Cerjak, 19.12.2005 63rd IUVSTA Workshop Avila September 17, 2010<br />

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