Difference between revisions of "Mott Run 2 Journal"
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= Run II (9 shifts is Friday DAY through Monday OWL) = | = Run II (9 shifts is Friday DAY through Monday OWL) = | ||
| − | # Good knowledge of beam (energy, energy spread, emittance) | + | # (2 shifts) Good knowledge of beam (energy, energy spread, emittance) |
| − | # Target thickness extrapolation at KE=5.0 MeV | + | # (3 shifts) Target thickness extrapolation at KE=5.0 MeV |
# Sensitivity of analyzing power vs. energy about 5.0 MeV | # Sensitivity of analyzing power vs. energy about 5.0 MeV | ||
| − | # Repeat spot size and possibly energy spread systematic at KE=5.0 MeV | + | # (1 shift) Repeat spot size and possibly energy spread systematic at KE=5.0 MeV |
| − | # Asymmetry vs. beam intensity | + | # (0.5 shift) Asymmetry vs. beam intensity |
== Prep and HCO w/o beam == | == Prep and HCO w/o beam == | ||
| Line 19: | Line 19: | ||
# (1 shift) Beam diagnostics - Test harp, BCM calibration, quick emittance method | # (1 shift) Beam diagnostics - Test harp, BCM calibration, quick emittance method | ||
| − | == Run II Beam and Polarimeter Setup | + | == Run II Beam and Polarimeter Setup == |
# Set KE=5.0 MeV | # Set KE=5.0 MeV | ||
# Measure emittance at MQJ0L02 | # Measure emittance at MQJ0L02 | ||
| Line 28: | Line 28: | ||
# Setup spin direction, use Mott for final adjustment | # Setup spin direction, use Mott for final adjustment | ||
| − | == Target Foil Extrapolation at KE=5.0 MeV | + | == Target Foil Extrapolation at KE=5.0 MeV == |
# Use the 10 foils with 25mm aperture spanning 8 nominal thicknesses (0.05, 0.05, 0.225, 0.35, 0.35, 0.50, 0.625, 0.750, 0.87, 1.0) | # Use the 10 foils with 25mm aperture spanning 8 nominal thicknesses (0.05, 0.05, 0.225, 0.35, 0.35, 0.50, 0.625, 0.750, 0.87, 1.0) | ||
# Interleave 1um gold foils to demonstrate stabiilty | # Interleave 1um gold foils to demonstrate stabiilty | ||
Revision as of 06:44, 7 October 2015
Run II (9 shifts is Friday DAY through Monday OWL)
- (2 shifts) Good knowledge of beam (energy, energy spread, emittance)
- (3 shifts) Target thickness extrapolation at KE=5.0 MeV
- Sensitivity of analyzing power vs. energy about 5.0 MeV
- (1 shift) Repeat spot size and possibly energy spread systematic at KE=5.0 MeV
- (0.5 shift) Asymmetry vs. beam intensity
Prep and HCO w/o beam
- (John) 31 MHz laser -
- (Riad) Test laser RF trigger at DAQ
- (Joe) Make a photocathode – SL5247-4 (52471-1 was used for Run I, but it's being removed from Gun2 next week)
- (Marcy) Check Mott vacuum, configuration (hipot 3D01 again?)
- (Joe) Cycle target ladder, test camera, test magnets, test 2D harp
- (Riad/Daniel) Check HV, check DAQ, Analysis, Macros ready for 31 MHz
Pre-Run II Beam Setup and Tests
- (Injector Group) Recovery to FC2 @ 6.3 MeV by 10/15
- (1 shift) Mott beam test - Test 31 MHz synchronization, set L/R/U/D delays, set PMT HV, check PMT response
- (1 shift) Beam diagnostics - Test harp, BCM calibration, quick emittance method
Run II Beam and Polarimeter Setup
- Set KE=5.0 MeV
- Measure emittance at MQJ0L02
- Measure energy spread at IHA2D00
- Verify BCM calibration good
- Calibrate PITA IHWP=in/out
- Setup beam to Mott, check PMT HV, TOF spectra, set thresholds HI, check instrumental asymmetry
- Setup spin direction, use Mott for final adjustment
Target Foil Extrapolation at KE=5.0 MeV
- Use the 10 foils with 25mm aperture spanning 8 nominal thicknesses (0.05, 0.05, 0.225, 0.35, 0.35, 0.50, 0.625, 0.750, 0.87, 1.0)
- Interleave 1um gold foils to demonstrate stabiilty