Collider Tune up During Proton Pilot Aggregate
The purpose of the Proton Injection aggregate is to set the chromaticity, coupling and tunes (in that order) properly for final Proton injection. There are currently some redundant steps as we are trying to gain confidence in some new applications. When an application is called up, there should be an instruct command on the sequencer that contains the help information shown below. Here is the general outline with some operational advise:
1) Inject coalesced beam and split the tunes using page T55 to Qh = .59 and Qy = .572. Use page C100 to measure the Chromaticity. Using the measued values, set the chromaticities to be 4 units in both planes. The use of C100 requires coalesced beam with intensity at least 250 e9. The beam is kicked when a measurement is made. If the beam is kicked more than 3 times, the quality of the beam will not be good enough for another measurement. Re-inject if the intensity is too low, or if the beam has been kicked 3 times.
Help for using page C100 is still at
http://www-bdnew.fnal.gov/tevatron/Operating_procedures_(help)/c100application.doc
2) Inject uncoalesced beam and double check the chromaticity using page C43.
3) Re-inject uncoalesced beam and use Eliana's program to measure and correct the coupling. First move the tunes to Qh = .586 and Qy = .578 using page T55. On Eliana's page,
4) Before leaving page C101, push the tunes together using page T55 to insure that the minimum tune split is less than .004. If the coupling change was not satisfactory, the skew quads can be put back by clicking on reset. This cannot be done if one leaves the page after the measurement.
5) Set the tunes to their operational values (Qh = .583 and Qy = .578).
Proton tune up is complete.
Remember that the purpose of using the new programs is to make the measurements easier. If the new method is difficult and causes problems, just perform the tuning the old way and report problems to Jerry Annala.