Detailed Steps for Tuning In-Flight Beams

Detailed Steps, Helpful Links, and an Example of an In-Flight Tune

1. Tune primary beam w/ RAISOR OFF to time-of-flight, check [define this] and record
2. Insert the required production target
3. Tune degraded beam w/ RAISOR OFF to time-of-flight, check [define this] and record
4. Turn on RAISOR DIPOLE MAGNETS, set to predefined starting fields [??]
5. Set RAISOR MIDPLANE SLITS to XXX (top) and XXX (bottom)
6. Insert the PRODUCTION TARGET APETURE
7. Insert the RAISOR MIDPLANE CUP
8. Tune the degraded beam THROUGH RAISOR to RAISOR MIDPLANE CUP
9. Optimize the degraded beam tune on the MIDPLANE CUP
   1. Clear the RAISOR MIDPLANE SLITS
   2. Periodically carry out slit scans to determine the midplane focus
   3. Looking to obtain a symmetric Gaussian distribution
   4. The FWHM of the peak is dependent upon the beam / target combination, usually want less than 1-3 mm FWHM
10. 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