Log entry time 16:19:57 on December 08, 2011

Entry number 243197

Day Shift Summary 08/12/2011

Shift Crew:
SL: J. Magee
TO: M. Shabestari
Others: JF Rajotte, Ramesh

Priorities for shift:

C100 cyromodule studies and tuning

Summary of events:

MCC took beam away at 8:20AM to insert and study two c100 cryomodules. The rest of the day was spent with us taking short, 10 minute runs to provide diagnostic information on beam quality. Several of the runs were with the pockel cell off, but they never told us when they turned it back on.

Also, Trent came in and installed the bcm5 box. Details can be found in hclog 243159 .

Typical operating parameters

The typical operating conditions were pretty poor, largely in part to three things:

• The bpm3c12X width was really large. It was 0.08-0.09, which is quadruple what it was during the owl shift.
• The Compton scintillator rate started at a nearly-ideal 40Hz, however occasionally blew up to 1000hz or more. We noticed this would occur as they adjusted the 3c12X jitter down, so we surmised they may have some correlation. I am unsure if this is reasonable or how to investigate this, but perhaps we should just keep it in mind in the future.
• During these runs we had a fairly large charge asymmetry width (~500ppm or more). Before messing with the c100's, the Aq_rms was about 300ppm.
• Lastly, I noticed the MDall sensitivities at least doubled during the cryomodule work. For example, a rough average during the owl shift for sensitivity x(y) was 1200(1000)ppm. At the day's end it was 2000(2800)ppm.

Run list:

14223-14244

Possibly important info:

• 14223: Baseline
• 14224: Baseline (they changed FFB in the middle)
• 14225: Baseline
• 14226: BAD (no seconds)
• 14227: BAD (trip, no data)
• 14233: BMod turned off
• 14234: New injector configuration
• 14237: Changed gain in injector
• 14238: Pockel cell turned off