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Accelerator Experiments To-Do List Update

List of open items as of Feb 10, 2006 including experiments, adjustments, and tasks for the particle accelerator project. Includes threshold changes, chamber checks, temperature adjustments, and beam stability tests.

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Accelerator Experiments To-Do List Update

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  1. To Do list, open items as of 10-Feb-06 ------------------------------------- \ Study threshold dependence on bunch length (Just changed Vrf to 4.5 MV) 4.5 MV running indicates very little sensitivity, if any • Change LCW temperature in IR 2 (UW, CEF) • Run QD4R chamber uncooled with low beam. Leak?? (MAC,tbd) • Run with a warm NEG. Threshold?? (S.DeB, SE, MS) √ Steer to minimize HOMs in VP3027. Threshold?? (JLT, done Saturday Feb 4) No significant effect on spikes. New items: √ Redo some of the NEG heating expts.(MS, SE) Done, have pressure profiles w/o 3027 pumps. √ Inject gas into chamber to see effect on beam stability (AK). Done & took data. Being moved to 3027. \ Ask Ross & McCormick to look at the acoustic monitors.(UW) Done, McCormick back Friday, Ross no answer. \ Again, induce instability & transverse abort. Vacuum spike? Done for LER, no spikes √ Turn off VP3027 VP3027 has been removed. • Check incoming absorbers for power difference before/after LER +25-m collimator (SDeB) • Run vertically separated • make large static orbit oscillations & look for vacuum activity • Run with BaBar threshold raised by factor 100 • Can the HER fan hit "soft spots" and cause trouble? \ Single beam HER running Need to raise rf limit before this is meaningful • More orbit issues? (FJD) \ Checkout & tune up LER TFB RCVR 2 has transient & Y-offset problem. √ Do a systematic HER vs LER study Done, see peplog • Change temperature of 3027 absorber (SE, MS). Need to focus on the components in LER Q4 and Q5 chamber (NEG, Absorber)

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