- This evening: LLRF is working on commissioning in Yellow.
1. In parallel work on instrumentation (BPM's, WCM, BBQ, BTF, ...)
2. Check and correct orbits.
3. Measure tunes and set to correct values.
- Overnight: Continue work in Yellow.
1. Test tune feedback.
2. Checkout orbit feedback in Yellow.
3. Measure Chrom. and dispersion
4. Check injection match and Y-arc tune.
- Tomorrow day: begin working on Blue acceleration, to Store.
1. At 7 am, PS group needs access to RHIC to fix bi8-qgt-ps.
2. At 8 am Don Bruno will start preparing Blue to ramp at the normal rate.
3. When the gamma quad is fixed, Don can try a ramp.
4. By late morning we can begin working on acceleration in Blue.
5. In parallel, Carl S. will be working on Yellow MMPS, preparing to ramp.
December 12, 2009
- Tonight: work on Yellow beam at injection. LLRF in Yellow (Capture).
1. Re-establish injection and work on circulating beam.
2. Probe apertures around 12 O'Clock and Yellow cold snakes.
These were areas of losses earlier today.
Note: we work without hysteresis loop in Yellow.
3. Correct Yellow orbit = try Run9 correctors for Yellow.
4. While work in Yellow, PS group will work on Blue. (Au100)
If they need to ramp, yellow beam work is suspended.
5. Contact RF group when there is circulating beam.
6. Checkout yellow instrumentation, BBQ, BTF, etc.
- Tomorrow: work with Blue ramp development - may have reduced acceleration rate.
1. PS group may not get the Blue ramp to run at the full rate of Au100.
They will leave us with the best they can develop.
2. While beam development in Blue, PS group can work on Yellow Ramp.
Carl needs most of the day and evening to study Yellow.
Yellow MMPS has new regulator and PLL, as does Blue, but
it also has the new auto-transformers.
So Carl needs to spend a good amount of time on Yellow.
3. For Blue, work on LLRF commissioning = acceleration.
Work with whatever ramp rate PS group suggests.
BBQ and tune feedback for every ramp.
If LLRF agrees, or is done, can try replay. (okay, the experts decide what is best for keeping beam on the ramp.)
Transition phase and gamma-tr jumps need to be setup.
Remember, timing should be set for Au100 (adjusted for ramp rate?).
4. As soon as Yellow is ready for ramps, begin Yellow acceleration work.
If RF group is ready.
Same drill: BBQ and tune feedback every ramp.
Checkout Yellow instrumentation with beam.
We will hold off reconnecting the WFG's for the two rings until we can settle the ramp rate issue.
So for the weekend we remain decoupled and work on each ring individually. We don't need to put in
the separation bumps yet, then.
Sorry I can't set more definite time/shifts for the work, but it all depends on the hours the
PS group works. So we are dependent on their work/sleep schedules at the moment.
December 11, 2009
- Today: work on Blue & Yellow MMPS
1. PS group working on blue ramp.
2. Yellow valve box work. Preparing Yellow for injection.
- Tonight: work on Blue & Yellow MMPS
1. For the Blue ramp, we are switching to Au100.
The Au101 ramp contains a distortion of the Q6/Q7 quadrupoles in Blue to allow the gamma-tr
jumps in Blue and Yellow to occur at different times. This distortion puts a
"bump" in the currents around transition. The "bump" is causing difficulties in
tuning up the MMPS's. The difficulties are significant enough that, to tune them
out, it will require significant time (a couple of days) before we could actually
run beam on a Blue ramp. The Au100 ramp does not contain this feature, but is otherwise
identical to the Au101 ramp. So we have to give up on the separate gamma-tr jumps, for
now, so we can get the beam developed and commission the LLRF.
2. Yellow valve box work.
The PS group is working hard to understand why one cable in the Yellow valve box is reading
high resistance. The repair will go into the evening and depending on when they can fix it
we may or may not get Yellow working tonight. We will have to stay tuned.
- This weekend:
The goal is to get beam to store in both Yellow and Blue by Monday morning. We will revisit
the state of the two machines tomorrow at 3:30 and form a more detailed plan at that time.
December 10, 2009
- Tonight: no ramp in Blue yet
1. PS group will work on Blue MMPS, possibly one ramp.
2. Between any Blue ramps, work with beam at injection.
3. Once Yellow is ready, work with beam at injection
To get Yellow ready:
== Need to finish polarity checks (5 pm)
== There are tests to do at injection current
== Need to demonstrate a hard shut-off.
4. If working in Blue, focus on:
== Measure Chromaticity
== Measure Dispersion
== Measure Sextupole Polarities
== Test InjectionTuning application, with new LLRF
== Test LLRF cogging
== Test LLRF radial steering (needed for measurements)
== Test LLRF Yellow synchro
== Test filling the entire ring (with bunches from AGS), then dump
This work will go on all night into the morning.
Tomorrow we will evaluate when we can begin working on ramps in Blue.
It is expected we can start tomorrow afternoon.
1. Assuming we can work on Blue ramp development, commission LLRF acceleration.
Work on transition phase jump and gamma-tr jump
Tune feedback for all stores = develop replay function.
2. Begin working on Yellow MMPS preparation for ramp development.
December 9, 2009
- Tonight: two activities
1. PS group is preparing Blue MMPS for ramps
2. Between Ramps LLRF will continue setup at injection.
- At midnight:
1. PS work ends.
2. Begin ramp development with beam, if MMPS is ready.
or, work with Blue at injection
- Tomorrow day:
1. Finish all work in the tunnels.
2. Prepare Yellow PS for injection
- Tomorrow evening/owl:
1. Work on yellow injection and capture
2. When yellow is in good shape, return to blue ramp devel.
- Friday day:
1. Blue ramp development
2. prepare yellow MMPS for ramp development.
December 8, 2009
- Today: bake-out work, p.s. check-out, and DX training
- Evening: P.S. group works on preparing Blue for ramping.
This work ends at ~8 pm.
- After 8 pm: begin beam development again.
1. Fix timing in AGS to RHIC transfer.
AGS extraction kicker timing
RHIC LLRF timing
2. LLRF commissioning at injection field.
3. Instrumentation checkout.
- Over owl: continue LLRF commissioning
2. if radial control is available
(BBQ should be working)
3. Check sextupoles (Yun)
4. Check coupling (Yun)
- Beam work ends at 6 am, to get early start tomorrow.
- Tomorrow, RHIC sweeps begin at 12 noon, so PS group can continue Blue checkout.
December 7, 2009
- Today: work on vacuum bake-out and p.s. check-out.
- 4 pm: RHIC is locked up and begin DX training again.
- Eve/owl: re-establish injection and circulating beam in Blue.
scan aperture at 4 O'Clock, where there was a loss last night.
commission LLRF (establish capture).
correct injection orbit
Injection Damper setup
December 6, 2009
- Still trying to keep to the Schedule.
- Today and tonight work on DX training.
- DX training is likely to go until ~2 am, Monday.
- Over the owl shift work again on getting Blue injection setup.
LLRF group is needed, since Blue Synchro is not setup.
once beam is circulating, RF group can work on capture.
- Injection work can go into the day shift, if needed.
Vacuum group needs access at some point to check bakeout.
PS group needs to work on Yellow sextupole PS's.
December 5, 2009
- Since no beam work was done last night, keep to Dec. 4 plan.
Except: once beam is circulating, contact RF group and work on capture.
- P.S. group is working on final tests for Blue.
- Expect to be able to inject around 9 pm.
December 4, 2009
- First, power supply group needs to complete checkout of MMPS.
- They should be done by 9 to 10 pm tonight. Then we can begin injection
setup in Blue.
- Start with the Run 7 corrector settings.
- Tune the AGS field to get the rev. freq. right in RHIC (on WCM).
- Setup the injection kickers and timing - get hundreds of turns (no RF).
- Checkout 1st turn BPM's (call Todd, he will work from Home).
- Over the owl, finished getting good circulating beam.
- At 8 am, Saturday, hand over RHIC for vacuum and power supply work.
December 3, 2009:
- Blue is down to 4-5 K, starting cooldown of Yellow.
December 2, 2009:
- Cooldown continues on schedule. Blue < 10 K now.
- Blue Main Power Supply being checked out. Not ready until Friday.
December 1, 2009:
- Start 4.5 K wave in Blue.
- Prepared plan for first week of beam development; see
Plan from Dec.1 to Dec.8
- Beam has been extracted to the AtR beam dump as of Wed., Nov.25.
November 19, 2009:
- Finishing up Dry Run.
- Today, LLRF begins switching over to new system.
- Beam was injected and captured in AGS. Setup continues per Schedule.
- working on run planning :)