002693913 001__ 2693913
002693913 003__ SzGeCERN
002693913 005__ 20220407140137.0
002693913 0247_ $$2DOI$$9JACoW$$a10.18429/JACoW-IPAC2019-WEPMP031
002693913 0248_ $$aoai:inspirehep.net:1745278$$pcerncds:CERN:FULLTEXT$$pcerncds:FULLTEXT$$pcerncds:CERN$$qINSPIRE:HEP$$qForCDS
002693913 035__ $$9http://inspirehep.net/oai2d$$aoai:inspirehep.net:1745278$$d2019-10-16T14:58:50Z$$h2019-10-17T04:00:08Z$$mmarcxml
002693913 035__ $$9Inspire$$a1745278
002693913 041__ $$aeng
002693913 088__ $$aCERN-PBC-CONF-2021-002
002693913 088__ $$aCERN-ACC-2019-199
002693913 100__ $$aFraser, Matthew$$jJACoW-00037260$$mmfraser@cern.ch$$uCERN
002693913 245__ $$aSPS slow extraction losses and activation: update on recent improvements
002693913 260__ $$c2019
002693913 300__ $$a4 p
002693913 520__ $$9JACoW$$aAnnual high intensity requests of over $1 \times 10^{19}$ protons on target (POT) from the CERN Super Proton Synchrotron (SPS) Fixed Target (FT) physics program continue, with the prospect of requests for even higher, unprecedented levels in the coming decade. A concerted and multifaceted R&D; effort has been launched to understand and reduce the slow extraction induced radioactivation of the SPS and to anticipate future experimental proposals, such as SHiP [1] at the SPS Beam Dump Facility (BDF) [2], which will request an additional $4 \times 10^{19}$ POT per year. In this contribution, we report on operational improvements and recent advances that have been made to significantly reduce the slow extraction losses, by up to a factor of 3, with the deployment of new extraction concepts, including passive and active (thin, bent crystal) diffusers and extraction on the third-integer resonance with octupoles. In light of the successful tests of the prototype extraction loss reduction schemes, an outlook and implications for future SPS FT operation will be presented.
002693913 540__ $$3Publication$$aCC-BY-3.0$$bJACoW$$uhttp://creativecommons.org/licenses/by/3.0/
002693913 562__ $$cComments submitted after 06-08-2021 15:28
002693913 65017 $$2SzGeCERN$$aAccelerators and Storage Rings
002693913 6531_ $$2JACoW$$aextraction
002693913 6531_ $$2JACoW$$aoperation
002693913 6531_ $$2JACoW$$aoctupole
002693913 6531_ $$2JACoW$$aproton
002693913 6531_ $$2JACoW$$aalignment
002693913 690C_ $$aCERN
002693913 693__ $$aCERN SPS
002693913 693__ $$pBeam Dump Facility
002693913 693__ $$sPhysics Beyond Colliders
002693913 700__ $$aBalhan, Bruno$$jJACoW-00004324$$mbruno.balhan@cern.ch$$uCERN
002693913 700__ $$aBarna, Daniel$$jJACoW-00041487$$mbarna.daniel@wigner.mta.hu$$uWigner RCP, Budapest
002693913 700__ $$aBartosik, Hannes$$jJACoW-00045028$$mhannes.bartosik@cern.ch$$uCERN
002693913 700__ $$aBernhard, Johannes$$iINSPIRE-00390204$$jJACoW-00104371$$jORCID:0000-0001-9256-971X$$uCERN
002693913 700__ $$aBertone, Caterina$$jJACoW-00005894$$mcaterina.bertone@cern.ch$$uCERN
002693913 700__ $$aBjörkman, Daniel$$jJACoW-00100152$$mdaniel.bjorkman@cern.ch$$uCERN
002693913 700__ $$aBorburgh, Jan$$jJACoW-00001572$$mjan.borburgh@cern.ch$$uCERN
002693913 700__ $$aBrugger, Markus$$iINSPIRE-00413534$$jJACoW-00005555$$uCERN
002693913 700__ $$aBrunner, Kristóf$$jJACoW-00104101$$mbrunner.kristof@wigner.mta.hu$$uWigner RCP, Budapest
002693913 700__ $$aCharitonidis, Nikolaos$$iINSPIRE-00487782$$jJACoW-00051944$$jORCID:0000-0001-9506-1022$$uCERN
002693913 700__ $$aConan, Nadine$$jJACoW-00051914$$mnadine.conan@cern.ch$$uCERN
002693913 700__ $$aCornelis, Karel$$iINSPIRE-00657729$$jJACoW-00001689$$uCERN
002693913 700__ $$aDutheil, Yann$$jJACoW-00051757$$mydutheil@cern.ch$$uCERN
002693913 700__ $$aEsposito, Luigi Salvatore$$iINSPIRE-00410868$$jJACoW-00060101$$uCERN
002693913 700__ $$aGarcia Alia, Ruben$$jJACoW-00063848$$jORCID:0000-0001-8030-1804$$mruben.garcia.alia@cern.ch$$uCERN
002693913 700__ $$aGatignon, Laurent$$iINSPIRE-00293451$$jJACoW-00001661$$jORCID:0000-0001-6439-2945$$uCERN
002693913 700__ $$aGenton, Charles-Mathieu$$jJACoW-00094952$$mcharles-mathieu.genton@cern.ch$$uCERN
002693913 700__ $$aGoddard, Brennan$$iINSPIRE-00545979$$jJACoW-00001570$$jORCID:0000-0002-9902-2431$$uCERN
002693913 700__ $$aHeßler, Christoph$$iINSPIRE-00540785$$jJACoW-00021459$$uCERN
002693913 700__ $$aKadi, Yacine$$jJACoW-00004380$$jORCID:0000-0001-5618-4644$$myacine.kadi@cern.ch$$uCERN
002693913 700__ $$aKain, Verena$$jJACoW-00004276$$mverena.kain@cern.ch$$uCERN
002693913 700__ $$aMereghetti, Alessio$$jJACoW-00036877$$jORCID:0000-0002-0586-257X$$malessio.mereghetti@cern.ch$$uCERN
002693913 700__ $$aPari, Michelangelo$$jJACoW-00107509$$mmichelangelo.pari@cern.ch$$uCERN
002693913 700__ $$aPatecki, Marcin$$jJACoW-00058580$$mmarcin.patecki@cern.ch$$uCERN
002693913 700__ $$aPrieto, Javier$$jJACoW-00103830$$mjavier.prieto.prieto@cern.ch$$uCERN
002693913 700__ $$aRedaelli, Stefano$$iINSPIRE-00373392$$jJACoW-00001564$$uCERN
002693913 700__ $$aRoncarolo, Federico$$iINSPIRE-00015709$$jJACoW-00001544$$uCERN
002693913 700__ $$aRossi, Roberto$$jJACoW-00088989$$mroberto.rossi@cern.ch$$uCERN
002693913 700__ $$aScandale, Walter$$iINSPIRE-00123694$$jJACoW-00001581$$uCERN
002693913 700__ $$aSolieri, Nicola$$jJACoW-00104155$$mnicola.solieri@cern.ch$$uCERN
002693913 700__ $$aSpanggaard, Jens$$jJACoW-00004758$$mjens.spanggaard@cern.ch$$uCERN
002693913 700__ $$aStein, Oliver$$jJACoW-00068652$$moliver.stein@cern.ch$$uCERN
002693913 700__ $$aStoel, Linda$$jJACoW-00080012$$mlinda.susanne.stoel@cern.ch$$uCERN
002693913 700__ $$aVelotti, Francesco$$iINSPIRE-00545987$$jJACoW-00060243$$jORCID:0000-0001-7815-6011$$uCERN
002693913 700__ $$aVincke, Helmut$$jJACoW-00004259$$mhelmut.vincke@cern.ch$$uCERN
002693913 773__ $$cWEPMP031$$qIPAC2019$$wC19-05-19.1$$y2019
002693913 8564_ $$81523925$$s339397$$uhttp://cds.cern.ch/record/2693913/files/wepmp031.pdf$$yFulltext from publisher
002693913 960__ $$a13
002693913 962__ $$b2672790$$kWEPMP031$$nmelbourne20190519
002693913 980__ $$aARTICLE
002693913 980__ $$aConferencePaper
002693913 999C5 $$9refextract$$hA. Golutvin et al.$$mRep$$m(SPSC-P-350), CERN, Geneva, Apr$$o1$$rCERN-SPSC-2015-016$$tA Facility to Search for Hidden Particles (SHiP) at the CERN SPS$$x[1] A. Golutvin et al., “A Facility to Search for Hidden Particles (SHiP) at the CERN SPS”, Rep. CERN-SPSC-2015-016 (SPSC-P-350), CERN, Geneva, Apr 2015.$$y2015
002693913 999C5 $$9refextract$$9CURATOR$$hM. Lamont et al.$$mRep., 11 Dec$$o2$$pGeneva, Switzerland: CERN$$rCERN-PBC-REPORT-2018-001$$tSPS Beam Dump Facility Comprehensive Design Study$$x[2] M. Lamont et al., “SPS Beam Dump Facility Comprehensive Design Study”, Rep. CERN-PBC-REPORT-2018-001, CERN, Geneva, Switzerland, 11 Dec 2018.$$y2018
002693913 999C5 $$9refextract$$9CURATOR$$hB. Balhan et al.$$mRep., 26 Mar$$o3$$pGeneva, Switzerland: CERN$$rCERN-ACC-NOTE-2019-0010$$tImprovements to the SPS Slow Extraction for High Intensity Operation$$x[3] B. Balhan et al., “Improvements to the SPS Slow Extraction for High Intensity Operation”, Rep. CERN-ACC-NOTE2019-0010, CERN, Geneva, Switzerland, 26 Mar 2018.$$y2018
002693913 999C5 $$9refextract$$9CURATOR$$mSPS Losses and Activation Working Group (SLAWG) meeting series, CERN, Geneva, Switzerland$$o4$$uhttps://indico.cern.ch/category/7887/$$x[4] SPS Losses and Activation Working Group (SLAWG) meeting series, CERN, Geneva, Switzerland, https://indico. cern.ch/category/7887/
002693913 999C5 $$9refextract$$hE.H.M. Heijne$$mPhD thesis, University of Amsterdam$$mpresented on 21 Jul$$o5$$rCERN-83-06$$tMuon Flux Measurement with Silicon Detectors in the CERN Neutrino Beams$$x[5] E.H.M. Heijne, “Muon Flux Measurement with Silicon Detectors in the CERN Neutrino Beams”, PhD thesis, University of Amsterdam, CERN-83-06, presented on 21 Jul 1983.$$y1983
002693913 999C5 $$01745282$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2019-WEPMP035$$hM. Pari et al.$$mpresented at the IPAC’19, Melbourne, Australia, May, paper WEPMP035, this conference$$o6$$x[6] M. Pari et al., presented at the IPAC’19, Melbourne, Australia, May 2019, paper WEPMP035, this conference.$$y2019
002693913 999C5 $$01745281$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2019-WEPMP034$$hF. M. Velotti et al.$$o7$$x[7] F. M. Velotti et al., presented at the IPAC’19, Melbourne, Australia, May 2019, paper WEPMP034, this conference. [21] L.S. Stoel, “Low-loss resonant extraction from hadron synchrotrons in the TeV energy scale”, PhD thesis, T.U. Wien, to be published. [22] M.A. Fraser, L.S. Stoel and F.M. Velotti, “Injector MD Procedure, SPS: Separatrix Folding with Octupoles During Resonant Slow Extraction”, EDMS no. 2014948, Geneva, CERN, Switzerland, 2018. [23] L.S. Stoel et al., “MD#4164: Separatrix folding with octupoles during slow extraction at SPS”, Rep. CERN-ACCNOTE-2019-0004, CERN, Geneva, Switzerland, 18 Feb 2019. [24] L.S. Stoel et al., presented at the IPAC’19, Melbourne, Australia, May 2019, paper WEPMP033, this conference. [25] B. Goddard et al., in Proc. IPAC’18, Vancouver, Canada, Apr.-May 2018, paper TUPAF053, pp. 830–833. [26] B. Goddard et al., “Reduction of 400 GeV Slow Extraction Beam Loss with a Wire Diffuser at the CERN SPS”, submitted to Phys. Rev. Accel. Beams. [27] F. M. Velotti et al., in Proc. IPAC’17, Copenhagen, Denmark, May 2017, paper MOPIK050, pp. 631–634.$$y2017
002693913 999C5 $$01690635$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2018-TUPAF035$$hF. M. Velotti et al.$$min Proc. IPAC’18, Vancouver, Canada, Apr.-May 2018, paper TUPAF035, pp. 761-764. [28] F. M. Velotti$$mPhD thesis, Ecole Polytechnique de Lausanne, Rep$$mpresented on 9 Mar$$o8$$tHigher brightness beams from the SPS for the HL-LHC era$$x[8] F. M. Velotti et al., in Proc. IPAC’18, Vancouver, Canada, Apr.-May 2018, paper TUPAF035, pp. 761–764. [28] F. M. Velotti, “Higher brightness beams from the SPS for the HL-LHC era”, PhD thesis, Ecole Polytechnique de Lausanne, Rep. CERN-THESIS-2017-041, presented on 9 Mar 2017.$$y2017
002693913 999C5 $$01690642$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2018-TUPAF050$$hJ.P. Prieto et al.$$o9$$x[9] J.P. Prieto et al., in Proc. IPAC’18, Vancouver, Canada, Apr.May 2018, paper TUPAF050, pp. 818–821. [29] F. M. Velotti et al., presented at the IPAC’19, Melbourne, Australia, May 2019, paper THXXPLM2, this conference.$$y2019
002693913 999C5 $$01690646$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2018-TUPAF054$$hM. A. Fraser et al.$$min Proc. IPAC’18, Vancouver, Canada, Apr.-May 2018, paper TUPAF054, pp. 834-837$$o10$$x[10] M. A. Fraser et al., in Proc. IPAC’18, Vancouver, Canada, Apr.-May 2018, paper TUPAF054, pp. 834–837. [30] M.A. Fraser, B. Goddard and F.M. Velotti, “Functional Specification for a Thin Bent Crystal Located in LSS2 for the Shadowing Tests of the ZS wires in 2018”, EDMS no. 1783433, Geneva, CERN, Switzerland, 2017.$$y2017
002693913 999C5 $$9refextract$$9CURATOR$$hL.S. Esposito$$mpresentation at the SPS Loss and Activation Working Group meeting #26, CERN, Geneva, Switzerland, 7 Feb 2018$$o11$$tFirst FLUKA Results of LSS2 Loss Maps$$uhttps://indico.cern.ch/event/701592/$$x[11] L.S. Esposito, “First FLUKA Results of LSS2 Loss Maps”, presentation at the SPS Loss and Activation Working Group meeting #26, CERN, Geneva, Switzerland, 7 Feb 2018, https://indico.cern.ch/event/701592/ [31] L. S. Esposito et al., presented at the IPAC’19, Melbourne, Australia, May 2019, paper WEPMP028, this conference.$$y2018
002693913 999C5 $$01690644$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2018-TUPAF052$$hJ.P. Prieto et al.$$o12$$x[12] J.P. Prieto et al., in Proc. IPAC’18, Vancouver, Canada, Apr.May 2018, paper TUPAF052, pp. 826–829. [32] K. Brunner et al., in Proc. IPAC’18, Vancouver, Canada, Apr.-May 2018, paper TUPAF061, pp. 862–865.$$y2018
002693913 999C5 $$9refextract$$9CURATOR$$hJ.P. Prieto$$mpresentation at the ABT Engineering Forum, CERN, Geneva, Switzerland, 10 Oct 2018$$o13$$tZS Alignment and Loss Reduction Studies$$uhttps://indico.cern.ch/event/750457/$$x[13] J.P. Prieto, “ZS Alignment and Loss Reduction Studies”, presentation at the ABT Engineering Forum, CERN, Geneva, Switzerland, 10 Oct 2018, https://indico.cern.ch/ event/750457/ [33] D. Björkman, “Progress on the LSS2 FLUKA Model”, presentation at the SPS Loss and Activation Working Group meeting #16, CERN, Geneva, Switzerland, 5 Apr. 2017, https://indico.cern.ch/event/621754/$$y2018
002693913 999C5 $$01745731$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2019-THPRB080$$hS. Hirlaender et al.$$mpresented at the IPAC’19, Melbourne, Australia, May 2019, paper THPRB080, this conference$$o14$$x[14] S. Hirlaender et al., presented at the IPAC’19, Melbourne, Australia, May 2019, paper THPRB080, this conference. [34] D. Björkman and L.S. Esposito, “Establishing a FLUKA Model for Slow Extraction in LSS2”, presentation at the SPS Loss and Activation Working Group meeting #25, CERN, Geneva, Switzerland, 24 Jan. 2018, https://indico.cern. ch/event/687186/$$y2018
002693913 999C5 $$9refextract$$hM.A. Fraser et al.$$mEDMS no. 2113420, Geneva, CERN, Switzerland$$o15$$tUpgraded Beam Instrumentation for Slow Extraction at SPS$$x[15] M.A. Fraser et al., “Upgraded Beam Instrumentation for Slow Extraction at SPS”, EDMS no. 2113420, Geneva, CERN, Switzerland, 2019.$$y2019
002693913 999C5 $$9refextract$$9CURATOR$$mReview at the SPS Losses and Activation Working Group meeting #5$$mCERN, Geneva, Switzerland, 1 Sept.$$o16$$tSlow extraction loss reduction brainstorming$$uhttps://indico.cern.ch/event/562757/$$x[16] Review at the SPS Losses and Activation Working Group meeting #5, “Slow extraction loss reduction brainstorming”, CERN, Geneva, Switzerland, 1 Sept. 2016, https: //indico.cern.ch/event/562757/$$y2016
002693913 999C5 $$01690647$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2018-TUPAF055$$hL. S. Stoel et al.$$min Proc. IPAC’18, Vancouver, Canada, Apr.May, paper TUPAF055, pp. 838-841$$o17$$x[17] L. S. Stoel et al., in Proc. IPAC’18, Vancouver, Canada, Apr.May 2018, paper TUPAF055, pp. 838–841.$$y2018
002693913 999C5 $$9refextract$$9CURATOR$$hV. Kain et al.$$msubmitted to Phys.Rev.Accel.Beams.$$o18$$tResonant Slow Extraction with Constant Optics for Improved Separatrix Control at the Extraction Septum$$x[18] V. Kain et al., “Resonant Slow Extraction with Constant Optics for Improved Separatrix Control at the Extraction Septum”, submitted to Phys. Rev. Accel. Beams. [35] S. Wuyckens, “Impact of the Beam Losses on the Feedthroughs of the SPS Electrostatic Septa”, presentation at the SPS Loss and Activation Working Group meeting #34, CERN, Geneva, Switzerland, 29 Aug 2018, https: //indico.cern.ch/event/748453/ [36] D. Björkman et al., presented at the IPAC’19, Melbourne, Australia, May 2019, paper WEPMP024, this conference.$$y2019
002693913 999C5 $$01626373$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2017-MOPIK046$$hL. S. Stoel et al.$$min Proc. IPAC’17, Copenhagen, Denmark, May, paper MOPIK046, pp. 615-618$$o19$$x[19] L. S. Stoel et al., in Proc. IPAC’17, Copenhagen, Denmark, May 2017, paper MOPIK046, pp. 615–618.$$y2017
002693913 999C5 $$01690643$$9refextract$$9CURATOR$$adoi:10.18429/JACoW-IPAC2018-TUPAF051$$hL. S. Stoel et al.$$min Proc. IPAC’18, Vancouver, Canada, Apr.May, paper TUPAF051, pp. 822-825$$o20$$x[20] L. S. Stoel et al., in Proc. IPAC’18, Vancouver, Canada, Apr.May 2018, paper TUPAF051, pp. 822–825.$$y2018
002693913 999C5 $$9CURATOR$$hL.S. Stoel$$mPhD thesis, T.U. Wien, to be published$$o21$$tLow-loss resonant extraction from hadron synchrotrons in the TeV energy scale
002693913 999C5 $$9CURATOR$$hM.A. Fraser, L.S. Stoel and F.M. Velotti$$mEDMS no. 2014948, Geneva, CERN, Switzerland$$o22$$tInjector MD Procedure, SPS: Separatrix Folding with Octupoles During Resonant Slow Extraction$$y2018
002693913 999C5 $$9CURATOR$$hL.S. Stoel et al$$mCERN, Geneva, Switzerland, 18 Feb$$o23$$rCERN-ACC-NOTE-2019-0004$$tMD#4164: Separatrix folding with octupoles during slow extraction at SPS$$y2019
002693913 999C5 $$01745280$$9CURATOR$$adoi:10.18429/JACoW-IPAC2019-WEPMP033$$o24
002693913 999C5 $$9CURATOR$$o25$$rFERMILAB-CONF-18-456-AD
002693913 999C5 $$9CURATOR$$hB. Goddard et al$$msubmitted to Phys.Rev.Accel.Beams$$o26$$tReduction of 400 GeV Slow Extraction Beam Loss with a Wire Diffuser at the CERN SPS
002693913 999C5 $$01626271$$9CURATOR$$o27
002693913 999C5 $$9CURATOR$$hF. M. Velotti$$mPhD thesis, Ecole Polytechnique de Lausanne, presented on 9 Mar 2017$$o28$$rCERN-THESIS-2017-041$$tHigher brightness beams from the SPS for the HL-LHC era
002693913 999C5 $$01745562$$9CURATOR$$o29
002693913 999C5 $$9CURATOR$$hM.A. Fraser, B. Goddard and F.M. Velotti$$mEDMS no. 1783433, Geneva, CERN, Switzerland$$o30$$tFunctional Specification for a Thin Bent Crystal Located in LSS2 for the Shadowing Tests of the ZS wires in 2018$$y2017
002693913 999C5 $$01745277$$9CURATOR$$o31
002693913 999C5 $$01690648$$9CURATOR$$o32
002693913 999C5 $$9CURATOR$$hD. Björkman$$mpresentation at the SPS Loss and Activation Working Group meeting #16, CERN, Geneva, Switzerland, 5 Apr 2017$$o33$$tProgress on the LSS2 FLUKA Model$$uhttps://indico.cern.ch/event/621754/$$y2017
002693913 999C5 $$9CURATOR$$hD. Björkman and L.S. Esposito$$mpresentation at the SPS Loss and Activation Working Group meeting #25, CERN, Geneva, Switzerland, 24 Jan$$o34$$tEstablishing a FLUKA Model for Slow Extraction in LSS2$$uhttps://indico.cern.ch/event/687186/$$y2018
002693913 999C5 $$9CURATOR$$hS. Wuyckens$$mpresentation at the SPS Loss and Activation Working Group meeting #34, CERN, Geneva, Switzerland, 29 Aug 2018$$o35$$tImpact of the Beam Losses on the Feedthroughs of the SPS Electrostatic Septa$$uhttps://indico.cern.ch/event/748453/$$y2018
002693913 999C5 $$01745273$$9CURATOR$$o36