Changing Between Beams Within A Cocktail

Beams changes within a cocktail may be completed quickly by changing the main field of the cyclotron and a limited number of changes to other beamline devices. The intention is to change the least number of devices while producing the same beam quality delivered to SEE.

Steps:

Run main probe in to 24“

This process could be done on FC2007, as long as the beam intensities for all beam species is within acceptable levels

Increase chopper duty cycle to 100%

Set the main field epsilon value to the new value

If the value is already logged/known, use that. Otherwise use the value from Analog Beams and add the offset for the pilot. e.g. Pilot is at -300 ppm, new beam expected at +5000 ppm, set field to +4700 ppm

Set the MHB F1 phase to the new value if known

If value is not known, maximize beam current on probe by adjusting MHB F1 phase.

Set the beam intensity to acceptable levels using chopper

Extract the probe and send beam to FC2007

Make additional adjustments to a minimal amount of devices. Observations have shown that the D0864 dipole will need to be adjusted, possibly the D0899 dipole

Send beam to end of SEE line FC2192

This may be done with small beam or uniform beam

Adjust HEBT dipoles (D2048 and D2060) to maximize current on FC2192

Set up uniform beam