1387885 20160111131425.0 oai:cds.cern.ch:1387885 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN Calatroni, S CERN Chiggiato, P CERN Costa Pinto, P CERN Neupert, H CERN Taborelli, M CERN Rumolo, G CERN Shaposhnikova, E CERN Vollenberg, W CERN ATS http://cds.cern.ch/record/1387885/files/CERN-ATS-2011-192.pdf Fulltext Yin Vallgren, C CERN evelyne.delucinge@cern.ch n 201204 11 1419750 ithaca20101008 CERN-ATS-2011-192 Amorphous carbon (a-C) thin films, produced in different coating configurations by using DC magnetron sputtering, have been investigated in laboratory for low secondary electron yield (SEY) applications. After the coatings had shown a reliable low initial SEY, the a-C thin films have been applied in the CERN Super Proton Synchrotron (SPS) and tested with Large Hadron Collider (LHC) type beams.Currently, we have used a-C thin film coated in so-called liner configuration for the electron cloud monitors. In addition the vacuum chambers of three dipole magnets have been coated and inserted into the machine. After describing the different configurations used for the coatings, results of the tests in the machine and a summary of the analyses after extraction will be presented. Based on comparison between different coating configurations, a new series of coatings has been applied on three further dipole magnet vacuum chambers. They have been installed and will be tested in coming machine development runs. CC-BY-3.0 Preprint CERN 2011 Preprint CERN EDS CLAS1 SzGeCERN Accelerators and Storage Rings CERN PREPRINT CERN LHC Not applicable 8 p Recent Experimental Results on Amorphous Carbon Coatings for Electron Cloud Mitigation 2011 Geneva CERN 01 Oct 2011 eng PUBLIC 000717972CER PREPRINT ConferencePaper 1386713 20160111131420.0 oai:cds.cern.ch:1386713 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN CERN EDS CLAS1 SzGeCERN Accelerators and Storage Rings PREPRINT ConferencePaper Ferreira, L CERN Macatrao, M CERN Skala, A CERN Sosin, M CERN de Waele, R CERN Withofs, Y KHLim, Diepenbeek Calatroni, S CERN CERN PREPRINT CERN Linac Not applicable 000717896CER sophie.nyamekye@cern.ch CERN-ATS-2011-191 CERN is assembling a new vertical electropolishing facility in order to process several niobium cavities of beta 1 and beta 0.65 in the context of the HP-SPL R&D programme. Electrochemical simulations are being used in order to define the optimal cathode geometry to process the cavities in a vertical position. Macroscopic properties of fluid dynamics like the Reynolds number and thermodynamics linked to the power dissipated in the process are taken into account to dimension the main system components. All the materials from the different equipments must be compatible with all chemicals within the required working temperature and pressure. To provide safe operating conditions when handling chemicals or processing cavities, specific safety and protection equipment is also foreseen. CC-BY-3.0 Preprint CERN 2011 Preprint n 201140 6 p ATS http://cds.cern.ch/record/1386713/files/CERN-ATS-2011-191.pdf Fulltext Status of the EP Simulations and Facilities for the SPL 2011 Geneva CERN 01 Oct 2011 eng 11 1302722 tsukuba20100912 PUBLIC 1386335 20160111131425.0 oai:cds.cern.ch:1386335 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN CERN EDS CLAS1 SzGeCERN Accelerators and Storage Rings PREPRINT ConferencePaper Baglin, V CERN CERN PREPRINT CERN LHC Not applicable 000717817CER sophie.nyamekye@cern.ch CERN-ATS-2011-190 Workshop on surface phenomena limiting ultimate pressures in vacuum systems. CC-BY-3.0 Preprint CERN 2011 Preprint n 201139 38 p ATS http://cds.cern.ch/record/1386335/files/CERN-ATS-2011-190.pdf Gas Reduction Arising from Particles Interaction in Large Colliders 2011 Geneva CERN 01 Sep 2011 eng 11 1265851 avila20100914 PUBLIC 1385878 20171106225434.0 oai:cds.cern.ch:1385878 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN ATS http://cds.cern.ch/record/1385878/files/CERN-ATS-2011-189.pdf Fulltext Auchmann, B CERN CERN-ATS-2011-189 The beam commissioning carried out in 2009 has proved that we have a pretty good understanding of the behaviour of the relation field-current in the LHC magnets and of its reproducibility. In this paper we summarize the main issues of beam commissioning as far as the magnetic model is concerned. An outline of what can be expected in 2010, when the LHC will be pushed to 3.5 TeV, is also given. Preprint CC-BY-3.0 Preprint CERN 2011 CERN EDS UNCL SzGeCERN Accelerators and Storage Rings CERN PREPRINT Bottura, L CERN Buzio, M CERN Deniau, L CERN Fiscarelli, L CERN Giovannozzi, M CERN Hagen, P CERN Lamont, M CERN Montenero, G CERN Mueller, G CERN Pereira, M CERN Redaelli, S CERN Remondino, V CERN Schmidt, F CERN Steinhagen, R CERN Strzelczyk, M CERN Tomas Garcia, R CERN AUTHOR|(CDS)2108516 #BEARD# Todesco, E CERN Venturini Delsolaro, W CERN Walckiers, L CERN Wenninger, J CERN Wolf, R CERN AUTHOR|(CDS)2067941 #BEARD# Zimmermann, F CERN 10 p evelyne.delucinge@cern.ch n 201204 11 1385877 evian20100119 The Magnetic Model of the Large Hadron Collider 2011 Geneva CERN 01 Sep 2011 eng PUBLIC 000717715CER 1281647 PREPRINT ConferencePaper DELETED 1385018 20160111131415.0 oai:cds.cern.ch:1385018 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN CERN-ATS-2011-188 eng Arpaia, P University of Sannio Italy Design of an on-line dynamic magnetic flux analyzer based on double-buffer sliding DFT 2011 CERN Geneva 01 Sep 2011 9 p An on-line dynamic magnetic flux analyzer for magnetic measurement is presented. The instrument achieves on-line harmonic analysis by means of an improved implementation of the sliding DFT algorithm on the basis of the Fast Digital Integrator [1]. In particular, the round-off error, unacceptable in digital integrators, is corrected by employing two buffers alternatively. Details about the structure of the instrument and the algorithm implementation are pointed out, and some experimental results are analyzed in order to validate the proposal. CC-BY-3.0 Preprint CERN 2011 Preprint CERN EDS UNCL SzGeCERN Accelerators and Storage Rings CERN PREPRINT Fiscarelli, L University of Sannio Italy, CERN Petrone, C University of Sannio Italy, CERN Cardines, N CERN ATS http://cds.cern.ch/record/1385018/files/CERN-ATS-2011-188.pdf evelyne.delucinge@cern.ch n 201204 11 1385017 kosice20100908 PUBLIC 000717635CER PREPRINT ConferencePaper