Run Plan for Kaon LT 10.6GeV End Game

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Strategy

  1. Finish remaining kinematic points
  2. Minimize risk:
    1. Finish full 6deg. dataset first to avoid rotation issues
    2. Next get partial dataset for last kinematic points
    3. Ensure we have Al Dummy for each setting by front-loading them at each kinematic change
    4. Aim to finish by Saturday, leaving buffer for contingencies or opportunistic revisiting of other kinematic points

Run Plan Schematic

Owl Day Swing
Wednesday 6deg. LH2 6deg. LH2 9deg. Dummy 9deg. LH2
Thursday 9deg. LH2 12deg. Dummy 12deg. LH2 12deg. LH2
Friday 9deg. LH2 9deg. LH2 9deg. LH2
Saturday 12deg. LH2 12deg. LH2 12deg. LH2 buffer
Sunday buffer buffer buffer
Monday buffer X X

Detailed Run Plan

Wednesday OWL

  1. Same setting and target as previous shift
    1. Setting: Q2=5.5, W=3.02, x=0.4, θSHMS=6.49
    2. Target: LH2
  2. Desired beam current: 45µA
    1. Do NOT run at higher beam current (will kill tracking efficiency)
    3. Ensure PS1 (SHMS-3-4) is giving pre-scaled rates close to 100Hz
    4. Ensure PS3 (HMS ELREAL) is giving pre-scaled rates close to 100Hz
    5. Ensure PS0 = 0 (This is the physics trigger!)
    6. Make a log entry if changing pre-scalers!
  3. Try to take 1 hour runs

Wednesday DAY

  1. Same setting and target as previous shift
    1. Setting: Q2=5.5, W=3.02, x=0.4, θSHMS=6.49
    2. Target: LH2
  2. Desired beam current: 45µA
    1. Do NOT run at higher beam current (will kill tracking efficiency)
    2. Ensure PS1 (SHMS-3-4) is giving pre-scaled rates close to 100Hz
    3. Ensure PS3 (HMS ELREAL) is giving pre-scaled rates close to 100Hz
    4. Ensure PS0 = 0 (This is the physics trigger!)
    5. Make a log entry if changing pre-scalers!
  3. Try to take 1 hour runs
  4. Instructions for the last hour:
    1. If beam really bad in last hour: prepare next kinematic setting/target for swing (see below)
    2. If beam still good in last hour: continue taking data until swing

Wednesday SWING

  1. Changing both target and SHMS rotation angle. Do simultaneously if possible to save time.
    1. NEW SETTING: Q2=5.5, W=3.02, x=0.4, θSHMS=9.56
    2. ROTATE SHMS to 9.56 deg (from TV)
      1. Beam off during the SHMS movement. Pay close attention to the hall cameras while departing the beam line, and be prepared to hit the rotation kill switch if necessary.
      2. All other spectrometer stay the same
    3. CHANGE TARGET: Al Dummy
  2. Desired beam current: 40µA
    1. Ensure PS1 (SHMS-3-4) is giving pre-scaled rates close to 100Hz
    2. Ensure PS3 (HMS ELREAL) is giving pre-scaled rates close to 100Hz
    3. Ensure PS0 = 0 (This is the physics trigger!)
    4. Make a log entry when changing pre-scalers!
  3. Try to take 1.6-1.9 hours of good data in 2-3 runs (Good data means 100% efficiency)
  4. Change target
    1. CHANGE TARGET: 10cm LH2
  5. Desired beam current: as much as possible with good stability
    1. Ensure PS1 (SHMS-3-4) is giving pre-scaled rates close to 100Hz
    2. Ensure PS3 (HMS ELREAL) is giving pre-scaled rates close to 100Hz
    3. Ensure PS0 = 0 (This is the physics trigger!)
    4. Make a log entry when changing pre-scalers!
  6. Try to take 1 hour runs
  7. For BTA: Pro-rate against 70µA when running on LH2

Thursday OWL

  1. Same setting and target as previous shift
    1. Setting: Q2=5.5, W=3.02, x=0.4, θSHMS=9.56
    2. Target: LH2
  2. Desired beam current: as much as possible with good stability
    1. Ensure PS1 (SHMS-3-4) is giving pre-scaled rates close to 100Hz
    2. Ensure PS3 (HMS ELREAL) is giving pre-scaled rates close to 100Hz
    3. Ensure PS0 = 0 (This is the physics trigger!)
    4. Make a log entry if changing pre-scalers!
  3. Try to take 1 hour runs
  4. For BTA: Pro-rate against 70µA when running on LH2

Thursday DAY

  1. Changing both target and SHMS rotation angle. Do simultaneously if possible to save time.
    1. NEW SETTING: Q2=5.5, W=3.02, x=0.4, θSHMS=12.56
    2. ROTATE SHMS to 12.56 deg (from TV)
      1. Beam off during the SHMS movement. Pay close attention to the hall cameras while departing the beam line, and be prepared to hit the rotation kill switch if necessary.
      2. All other spectrometer stay the same
    3. CHANGE TARGET: Al Dummy
  2. Desired beam current: 40µA
    1. Ensure PS1 (SHMS-3-4) is giving pre-scaled rates close to 100Hz
    2. Ensure PS3 (HMS ELREAL) is giving pre-scaled rates close to 100Hz
    3. Ensure PS0 = 0 (This is the physics trigger!)
    4. Make a log entry when changing pre-scalers!
  3. Try to take 1.6-1.9 hours of good data in 2-3 runs (Good data means 100% efficiency)
  4. Change target
    1. CHANGE TARGET: 10cm LH2
  5. Desired beam current: as much as possible with good stability
    1. Ensure PS1 (SHMS-3-4) is giving pre-scaled rates close to 100Hz
    2. Ensure PS3 (HMS ELREAL) is giving pre-scaled rates close to 100Hz
    3. Ensure PS0 = 0 (This is the physics trigger!)
    4. Make a log entry when changing pre-scalers!
  6. Try to take 1 hour runs
  7. For BTA: Pro-rate against 70µA when running on LH2
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