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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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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

NFMCC Friday Meeting

slide2

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

slide3

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

slide4

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

slide5

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

slide6

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

slide7

300 MeV/c

NFMCC Friday Meeting

slide8

200 MeV/c

NFMCC Friday Meeting

slide9

150 MeV/c

NFMCC Friday Meeting

slide10

100 MeV/c

NFMCC Friday Meeting

spectrometer update
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

slide12

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

slide13

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