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Overview of Beam Diagnostics Linac-4

Overview of Beam Diagnostics Linac-4. Linac-4 Instrumentation review CERN, 18.10 2011 Uli Raich BE/BI. Linac-4 placement in the injector chain. LT. LTB. Linac2. BHZ20. Linac4. PS Booster. Linac-4 parameters. Layout of the Linac. Parameters to be measured.

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Overview of Beam Diagnostics Linac-4

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  1. Overviewof Beam Diagnostics Linac-4 Linac-4 Instrumentation review CERN, 18.10 2011 UliRaichBE/BI

  2. Linac-4 placement in the injector chain LT LTB Linac2 BHZ20 Linac4 PS Booster CERN Linac-4 instrumentation review Uli Raich BE/BI

  3. Linac-4 parameters CERN Linac-4 instrumentation review Uli Raich BE/BI

  4. Layout oftheLinac CERN Linac-4 instrumentation review Uli Raich BE/BI

  5. Parameters tobemeasured • Intensityat different energies(connectedto interlock system) • Beam trajectoryandenergy (phase) • Beam profile • Energyspread, will bemeasuredatlowenergyupto 3 MeVonly • Transverse emittanceat 45 keV, 3 Mev, 12 MeV, 160 MeV • Choppingefficiency • Bunchshape • Beam loss (connectedto interlock system)max beam loss: 1 W/mnot morethan 1 full beam pulse maybe lost • Diagnosticsforchargeexchangeinjectionintothe Booster CERN Linac-4 instrumentation review Uli Raich BE/BI

  6. Wide varietyofbeams The Booster produces a widevarietyofbeamswith different characteristics: Beam properties (intensityvariations) tobedefinedmainlybychopping CERN Linac-4 instrumentation review Uli Raich BE/BI

  7. Machinesectionsandtheirinstrumentation Installedatthe 3 MeVtest stand • Ion sourceand LEBT: • Currently: protonsource, ~ 40 mA, 450 μs • Faraday Cup, SEMGrid, transformerandtransverseemittancemeter (slit/grid) areinstalledandrunning. CERN Linac-4 instrumentation review Uli Raich BE/BI

  8. RFQ, Chopperandmeasurementline • RFQ andchopperline • RFQ isforeseentoarrive in October. • Measurement lineis in preparation: • 2 transformers • 3 BPMs measuringpositionandphase • Transverse emittancemeterwithnewslit • Bunchshapemonitorbeingassembledandtested in October • Halo monitortotestchopping • SpectrometerwithSEMGrid • Will bemoved after useandfinallyremovedfromthemachine • Chopper Line • 2 transformers • 2 wirescanners CERN Linac-4 instrumentation review Uli Raich BE/BI

  9. Measurement lineforcommissioningonly CERN Linac-4 instrumentation review Uli Raich BE/BI

  10. Chopper Line Avoidlosseswhenswitchingthedistributor Injectintowaiting RF bucketsofthe Booster CERN Linac-4 instrumentation review Uli Raich BE/BI

  11. DTL 3 BPMs 1 BCT 1SEMGrid Verylittlespace, neededdedicated design for all devices CERN Linac-4 instrumentation review Uli Raich BE/BI

  12. CCDTL BPMs after eachmodule BCT after the last module Profile measurements, alternatingSEMGridsandwirescanners after tanks 1,3,5,7 CERN Linac-4 instrumentation review Uli Raich BE/BI

  13. PIMS BPM after module 2,4,6,8,10,12 Profile measurement after module 3, 5, 9 (W,S,W) BCT after module 12 CERN Linac-4 instrumentation review Uli Raich BE/BI

  14. Dump Line andtransferline • Layout hasbeenfrozenonlyrecently • Emittancemeasurementusing 4 SEMGrids • Final positionof BSM • R&D foreseenforprofileandemittancemeasurementsusinglaserstripping. • BCTs, SEMGrids, BPMs (seetable) CERN Linac-4 instrumentation review Uli Raich BE/BI

  15. List of instruments CERN Linac-4 instrumentation review Uli Raich BE/BI

  16. List of Instruments CERN Linac-4 instrumentation review Uli Raich BE/BI

  17. Schedule • Designs ofalmost all instrumentsarefinished • First cablingcampaignfinished • Measurements on RFQ foreseenforbeginning 2012 • Constructionof all sensors + electronics in 2012 • Installation in thetunnelstartingfrom 2013 tobefinished in 2014 • Test beam ontodumpfrom 2014 onwards CERN Linac-4 instrumentation review Uli Raich BE/BI

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