Detailed Steps for Tuning In-Flight Beams: Difference between revisions
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# Tune primary beam w/ RAISOR OFF to time-of-flight, check [define this] and record | # Tune primary beam w/ RAISOR OFF to time-of-flight, check [define this] and record | ||
# Insert production target APETURE and focus primary beam on production target with SOLENOID | # Insert production target APETURE and focus primary beam on production target with SOLENOID | ||
# Turn on RAISOR DIPOLE MAGNETS, set to predefined starting fields [??] | |||
# Insert the RAISOR MIDPLANE CUP | # Insert the RAISOR MIDPLANE CUP | ||
## Use cups before and after production target | ## Use cups before and after production target | ||
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# Insert the required production target | # Insert the required production target | ||
# Tune degraded beam w/ RAISOR OFF to time-of-flight, check [define this] and record | # Tune degraded beam w/ RAISOR OFF to time-of-flight, check [define this] and record | ||
# Set RAISOR MIDPLANE SLITS to XXX (top) and XXX (bottom) | # Set RAISOR MIDPLANE SLITS to XXX (top) and XXX (bottom) | ||
# Tune the degraded beam THROUGH RAISOR to RAISOR MIDPLANE CUP | # Tune the degraded beam THROUGH RAISOR to RAISOR MIDPLANE CUP |
Revision as of 18:12, February 27, 2019
Detailed Steps, Helpful Links, and an Example of an In-Flight Tune
- Tune primary beam w/ RAISOR OFF to time-of-flight, check [define this] and record
- Insert production target APETURE and focus primary beam on production target with SOLENOID
- Turn on RAISOR DIPOLE MAGNETS, set to predefined starting fields [??]
- Insert the RAISOR MIDPLANE CUP
- Use cups before and after production target
- Check for current on MIDPLANE CUP as well
- Insert the required production target
- Tune degraded beam w/ RAISOR OFF to time-of-flight, check [define this] and record
- Set RAISOR MIDPLANE SLITS to XXX (top) and XXX (bottom)
- Tune the degraded beam THROUGH RAISOR to RAISOR MIDPLANE CUP
- Optimize the degraded beam tune on the MIDPLANE CUP
- Clear the RAISOR MIDPLANE SLITS
- Periodically carry out slit scans to determine the midplane focus
- Looking to obtain a symmetric Gaussian distribution
- The FWHM of the peak is dependent upon the beam / target combination, usually want less than 1-3 mm FWHM
- Continue degraded beam tune to RAISOR EXIT
Definitions
- primary beam - the beam species and charge state taken out of the source at the ATLAS energy requested
- degraded beam - the same beam species as the primary beam but at a different (lower) energy and most likely different (higher) charge state
- production target - the target put in place before RAISOR, e.g., Be foil or Gas Cell