Difference between revisions of "ThermalBreakin"
From PREX Wiki
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[[Main_Page|<B>PREX Main</B>]]<< [[Information for Shift Takers]] << [[Shift Leader]] << [[HOW TOs]] | [[Main_Page|<B>PREX Main</B>]]<< [[Information for Shift Takers]] << [[Shift Leader]] << [[HOW TOs]] | ||
| + | |||
| + | Note: these instructions may change as we learn from the target. | ||
# Start with Ca-40 target at 50uA | # Start with Ca-40 target at 50uA | ||
| − | # Take data for 1 hour | + | # Take data for 1 hour, carefully monitoring: |
| − | # | + | ## asymmetry widths |
| − | # | + | ## collimator temperatures (expect ~ W at 50uA) |
| + | ## cold ladder temperatures | ||
# If everything seems okay, go to 100 uA on Ca-40 | # If everything seems okay, go to 100 uA on Ca-40 | ||
| − | #* Follow steps from above | + | #* Follow steps from 1 above |
# If everything seems okay, go to 150 uA on Ca-40 | # If everything seems okay, go to 150 uA on Ca-40 | ||
| + | |||
| + | <br><br> | ||
| + | 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. | ||
Revision as of 20:01, 11 December 2019
PREX Main<< Information for Shift Takers << Shift Leader << HOW TOs
Note: these instructions may change as we learn from the target.
- Start with Ca-40 target at 50uA
- Take data for 1 hour, carefully monitoring:
- asymmetry widths
- collimator temperatures (expect ~ W at 50uA)
- cold ladder temperatures
- If everything seems okay, go to 100 uA on Ca-40
- Follow steps from 1 above
- 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.
