|
Day
|
Summary
|
Link to report from morning meeting
|
| Monday 22nd November |
|
Slides from 08:30 meeting |
|
Sunday 21st November |
- Fill 1504 dumped by OP at 06.00
(produced 0.35 ub-1 in 7 hours)
- Refilling disturbed by missing bunches in SPS
- Uncertainties on BCT measurements, but lower than before
- Stable beam from 11.00, fill 1505, lumi 1e25
- Fill 1505 dumped by OP at 13:00 (produced 0.07 ub-1
in 2 hours)
- 14:30-15:30 Problem in reinjecting beam 2. Large tune trim
due to wrong tune feedback reference.
- 15:30-21:00 Transverse feedback setting-up with ions.
- Delays in getting to stable beams because of problems in the
PS (main power supply and RF)
|
Slides
from 09:00 meeting |
|
Saturday 20th November |
- 01.30 50ns beam (Beam 2 only)dumped at
3.5 TeV
- Access for Beam Dump
- Injection trains of 24+24 with 50ns spacing. 444 bunches in
beam 1
- 08.00 Stop proton operation. Switch back to ions.
- 10.00 Beam 1 ions circulating. Beam 2
circulating
- 10:30 - : PS RF problem (80 MHz cavity. No beam for 1 hour
- RF capture optimisation from 11.30 to 13.00
- Test ramp, squeeze, collide, 2 on 2, also for lumi scan
qualification
- Filling for physics from 17.00, interrupted by SPS/PS RF
problems
- Successful filling from 21.00, missing one bunch last
injection B2
- Stable beams at 23.00, fill 1504, lumi 2e25
|
Slides
from 09:00 meeting,
slides on vacuum observations (G. Bregliozzi) |
|
Friday 19th November |
- 02:30 680 bunches on Beam 1 at 450 GeV
with 75 ns spacing (8+14*48) - 1.1x1011 p/bunch -
batch spacing=1.85 microseconds
- 05:40 824 bunches of Beam1 at 450 GeV
with 75 ns spacing 1.1x1011 p/bunch - batch
spacing=1.05 microseconds
- 08:30 - Switch to protons 50 ns spacing
- Setting up of 12, 24 and 24+24 bunch injection
- IP6 BPM test OK with 108 bunches
- Test ramp with single nominal bunches. Full set of loss maps
done.
- Set up for 'repeat' of fill 1459, night of
Oct 30/31, 1+12*9 bunches of 1.1e11. Lost at 3.5 TeV because of
trip of power converter (RQTD.A12B1)
- 22:30 Issues with MKD B1 ==> go with ramp with beam 2 only
- Ramp with 1+12*9 bunches of 1.1e11 (Beam 2 only) for cryo
and vacuum measurements
-
|
Slides from 08:30 meeting
Slide on vacuum observations (V. Baglin) |
|
Thursday 18th November |
- 06:00 - 10:30 Injection checks/SPS beam quality
verification/Abort gap cleaning checks.
- 10:30 Start filling with an eye on vacuum and cryogenics
- 15:45 680 bunches/beam at 450 GeV
with 75 ns spacing (8+14*48) - 0.9x1011 p/bunch
- Kept this beam for 2 hours for UFO investigations
- 18:00 Beam dumped by OP
- 18:30-22:00 Damper setting-up
- Problem with capture of Beam 2 with 75 ns beam of 1.2x1011
p/bunch. Go for injection of beam 1 only.
|
Slides from 08:30 meeting |
|
Wednesday 17th November |
- 00:30 Stable Beams #1496
- 06:15 Dumped by operation (~0.3 ub-1 in ~6 h)
06:00 Start proton MD
09:30 Pilot injection: LHC-SPS
Re-synchronization problem
09:30-10:30 No beam form CPS (RF
problem)
12:00 LHC-SPS Re-synchronization
problem fixed. In the mean time test 75 ns beam in the SPS
14:00 Beam Presence flag test done
14:30-15:00 Phase loop gain
adjustment
15:00-16:30 PS Access (in the
mean time first set of loss maps)
16:30-22:00 Issues with RF
capture of single bunch with nominal intensity.
22:00-23:00 Setting-up of single
bunch injection
23:00-06:00 Transfer line and
injection setting-up with 75 ns
|
Slides from 08:30 meeting
Proton MD plan |
|
Tuesday 16th November |
- Fill 1494, large emittances, stable beams from 02.30
- Dumped by operations at 09.00 (~ 0.25 ub-1 in ~6.5 h)
- Fill 1495 dumped by RF dump (cavity quench)
- 14:00 17:30 Access for flooding alarm in point 4 (access
for BI in the shadow)
- 18:30 Power converter (RQT13.L2B2) problem during pre-cycle. Access
- 20:00 Pre-cycling
- 21:30 Injection
|
Slides
from 8:30 meeting |
|
Monday 15th November
|
- 00h30: Beam dump.
- 01h30: Injection. 121b
x 121b.
- 07h42: Stable
beams. Fill #1492. Reach 2.5e25 cm-2 s-1
- Fill lost at 08.45 due
to electrical network instability
- Refill with same
configuration
- Stable beam at 12.50,
Fill 1493, luminosities 2.8e25cm-2s-1
- 22:00 End of fill 1493
(Programmed dump: >0.45 ub-1 in ~9 h)
|
Slides
from 8:30 meeting
|