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PREX Main<< Information for Shift Takers << Shift Leader << HOW TOs

Note: these instructions may change as we learn from the target.

  1. Start with Ca-40 target at 50uA
  2. Take data for 1 hour, carefully monitoring:
    1. asymmetry widths
    2. collimator temperatures (expect ~ W at 50uA)
    3. cold ladder temperatures
  3. If everything seems okay, go to 100 uA on Ca-40
    • Follow steps from 1 above
  4. If everything seems okay, go to 150 uA on Ca-40

Explanation: The calcium oxidizes very quickly, and the presence of oil residue or an oxide layer could affect the thermal contact/conductivity so we want to carefully ablate the surface layer and make sure that we have stable target conditions to avoid damaging it with high current.