642984 SzGeCERN 20161210233001.0 oai:cds.cern.ch:642984 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN SPIRES 7963890 Inspire 707543 CERN-AT-2003-006-VAC eng Mahner, E CERN Ion-stimulated gas desorption yields of coated (Au, Ag, Pd) stainless steel vacuum chambers irradiated with 4.2 MeV/u lead ions 2005 Geneva CERN 18 Sep 2003 11 p paper The ion-induced desorption experiment, installed in the CERN Heavy Ion Accelerator (LINAC 3), has been used to measure molecular desorption yields for 4.2 MeV/u lead ions impacting on different accelerator-type vacuum chambers. In order to study the effect of the surface oxide layer on the gas desorption, gold-, silver-, and palladium-coated 316LN stainless steel chambers and similarly prepared samples were tested for desorption at LINAC 3 and analysed for chemical composition by X-ray Photoemission Spectroscopy (XPS). The large effective desorption yield of 2 x 10**4 molecules/ion, previously measured for uncoated, vacuum fired stainless steel, was reduced after noble metal coating by up to 2 orders of magnitude. In addition, the effectiveness of beam scrubbing with heavy ions and the consequence of a subsequent venting on the desorption yields of a beam-scrubbed vacuum chamber are described. Practical consequences for the vacuum system of the future Low Energy Ion Ring (LEIR) are discussed. CC-BY-3.0 Publication 20030922SLAC CERN EDS UNCL SzGeCERN Accelerators and Storage Rings CERN ARTICLE Hansen, J CERN Küchler, D CERN Malabaila, M CERN Taborelli, M CERN AT 053201 Phys. Rev. Spec. Top. Accel. Beams 8 2005 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2003-006-VAC http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2003-006 Access to fulltext document http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=aps&id=PhysRevSTAB.8.053201 APS Published version, local copy http://cds.cern.ch/record/642984/files/PhysRevSTAB.8.053201.pdf APS Published version, local copy http://cds.cern.ch/record/642984/files/at-2003-006.pdf Access to fulltext document http://cds.cern.ch/record/642984/files/at-2003-006.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200339 a2006 13 20100901 1606 CER01 20050110 PUBLIC 002399101CER ARTICLE 0001