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A study of outgassing by impacting surfaces in ultra high vacuum using mass spectrometry is presented. The substrate, which receives the impact, is a stainless steel AISI 304 sheet. The impacting surface is a carbon chromium ball. Impacts were performed at energies of 3.36 and 9.8mJ. The average pressure increases over 20 impacts for the first desorption peak in the ultra high vacuum system were 1...
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