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MICE Updates

MICE Updates. Target. Beamline Quadrupoles Target Decay Solenoid Beam Detecors Spectrometer Update Tracker Updates. BM2. BM1. Decay Solenoid. Terry Hart, NFMCC Friday Meeting, September 26, 2008. MICE Beamline. Quadrupoles. Target. Leaks in 2 nd set of quadrupole triplets

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MICE Updates

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  1. MICE Updates Target • Beamline • Quadrupoles • Target • Decay Solenoid • Beam Detecors • Spectrometer Update • Tracker Updates BM2 BM1 Decay Solenoid Terry Hart, NFMCC Friday Meeting, September 26, 2008 NFMCC Friday Meeting

  2. MICE Beamline Quadrupoles Target • Leaks in 2nd set of quadrupole triplets • 3rd set has same design • These 6 quadrupoles turned off until fixed • Plan • Fix last triplet outside DSA while ISIS is running • Swap them for 2nd triplet during October shutdown • Hope repaired quadrupoles will be ready for November running BM2 BM1 Decay Solenoid Target: Titanium paddle dipped into ISIS proton beam to produce pions Decay Solenoid: Focuses muon beam coming from pion decay BM1, BM2: scintillating fiber beamline monitors GVA1, GVA2: scintillating paddle beamline monitors NFMCC Friday Meeting

  3. MICE Beamline Target Target • New MICE DAQ will receive target and ISIS beam loss information • No target depth information for now • New off-line system failure • Wear on upper bearing • Partially taken apart, sent to RAL Metrology group • Continued investigation • Alignment o.k. • Magnetization o.k. • Coil distortion? • Shaft distortion? • Poor coating? BM2 BM1 Decay Solenoid Target: Titanium paddle dipped into ISIS proton beam to produce pions Decay Solenoid: Focuses muon beam coming from pion decay BM1, BM2: scintillating fiber beamline monitors GVA1, GVA2: scintillating paddle beamline monitors NFMCC Friday Meeting

  4. MICE Beamline Target Decay Solenoid • Half of magnet won’t go superconducting (downstream end) • Plan: • Take off back of magnet during October shutdown • More work may be necessary in December including removal of cold mass • Good news: DSA walls won’t need to be moved BM2 BM1 Decay Solenoid CKOV A,B Target: Titanium paddle dipped into ISIS proton beam to produce pions Decay Solenoid: Focuses muon beam coming from pion decay BM1, BM2: scintillating fiber beamline monitors GVA1, GVA2: scintillating paddle beamline monitors NFMCC Friday Meeting

  5. MICE Beamline Target Beam Counters • Both taken out of DSA • Noise problems being fixed • Single fiber planes to be replace by doublet planes • Should be ready by October shutdown BM2 BM1 Decay Solenoid CKOV A,B Target: Titanium paddle dipped into ISIS proton beam to produce pions Decay Solenoid: Focuses muon beam coming from pion decay BM1, BM2: scintillating fiber beamline monitors GVA1, GVA2: scintillating paddle beamline monitors NFMCC Friday Meeting

  6. MICE Beamline Target GVA 1,2 GVA 2 • Electron beam detection tests • Time of Flight calibration and KL calorimeter response function study • Measure time of flight for 300, 200, 150, and 100 MeV/c tracks. • As momenutm decreases • Electron, pion peaks separate • Less pions GVA 1 BM2 BM1 Decay Solenoid CKOV A,B Target: Titanium paddle dipped into ISIS proton beam to produce pions Decay Solenoid: Focuses muon beam coming from pion decay BM1, BM2: scintillating paddle beamline monitors GVA1, GVA2: scintillating paddle beamline monitors NFMCC Friday Meeting

  7. 300 MeV/c NFMCC Friday Meeting

  8. 200 MeV/c NFMCC Friday Meeting

  9. 150 MeV/c NFMCC Friday Meeting

  10. 100 MeV/c NFMCC Friday Meeting

  11. Spectrometer Update • Issues with magnet #1 • Frozen N2 in cold mass prevented normal operation • Inadequate thermal connection • Venting of cold mass during quench not adequate • Mechanical issues • No provision of direct cooldown of cold mass radiation shield • Schedule • Complete magnet #2 with design changes • Ship magnet #2 to FNAL while opening up magnet #1 • Goal to complete magnet #2 test by mid-November • Magnet #1 assembly and completion about 2 months after that NFMCC Friday Meeting May not need to postpone magnetic field measurements until both spectrometers are at RAL

  12. Tracker Firmware - Zero Suppression:Keeping Data From Channels Above Threshold • Reduces time to digitize charges, times • More efficient data storage than when all channels are read out • Works at IIT and FNAL single-board test stands • Data unpacker debugged • For cosmic ray test • 7 out of 8 boards have almost no hits (1 board has expected hit number) • Will check RAL and FNAL spreadsheets NFMCC Friday Meeting

  13. Tracker Firmware - Data Buffering: 4-level buffer to allow data collection during data digitization • Logic has been verified in simulation • Tests with self-injected not working for short trigger periods • Bad values for reconstructed charges, times • Data format breaks down • These are repeatable • Some firmware modifications being written for tests • 2 events less than 100 ns apart • Check pedestal width vs. trigger period, buffer depth NFMCC Friday Meeting

  14. NFMCC Friday Meeting

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