Meny

Javascript is not activated in your browser. This website needs javascript activated to work properly.
Du är här

Ar beam induced desorption from different materials at TSL

Författare:
  • O. B. Malyshev
  • B. Zajec
  • A. Haase
  • L. Westerberg
  • Mats Leandersson
  • M. Bender
  • A. Kramer
  • H. Kollmus
  • H. Reich-Sprenger
Publiceringsår: 2010
Språk: Engelska
Sidor: 338-343
Publikation/Tidskrift/Serie: Vacuum
Volym: 85
Nummer: 2
Dokumenttyp: Artikel
Förlag: Elsevier Science Ltd

Sammanfattning

This paper describes new experiments on the heavy ion desorption yield measurements with 5 MeV/u Ar8+ and summarizes all results of experiments with 5 MeV/u Ar8+ performed at The Svedberg Laboratory in Uppsala (Sweden). These results are important for the update and design of the FAIR facility at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt (Germany) where the required increase in beam intensity is limited by ion induced pressure instability. It was shown that lowest desorption yields can be achieved with gold coatings, whereas grazing incident loss increases the desorption yield by roughly an order of magnitude compared to perpendicular loss. The desorption yield of saturated NEG samples was measured to be higher compared to any non pumping samples. The desorption yield of copper can be lower and higher compared to stainless steel depending on cleaning procedure and sample history. Additionally the secondary electron and ion yield was measured to be a few tens of electrons and ions emitted per projectile impact in backward direction. Their influence on the desorption yield due to secondary effects was less than 5% compared to the primary desorption by the high energetic projectile. (C) 2010 Elsevier Ltd. All rights reserved.

Disputation

Nyckelord

  • Physics and Astronomy
  • Secondary
  • Vacuum system
  • Desorption yield
  • Heavy ions
  • Gas desorption
  • particles

Övriga

Published
Yes
  • ISSN: 0042-207X

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen