| Day |
Short
summary/plan |
Link to report from 8:30 and 17:00
meetings |
|
Monday 5th April 2010 |
|
Presentation
at the 09:00 meeting
|
|
Sunday 4th April 2010 |
- 02:49 Beam dump due to trip of RQF.A78 followed by trip
of triplet L5 (current lead temperature gauge)
- 06:00-11:30 Access for triplet temperature gauge repair
(L5) and quench heater power supply replacement (sector 34)
- 12:00 Prepare for Physics fill
- 17:30 Stable beams!!!
|
Presentation
at the 09:00 meeting
|
|
Saturday 3rd April 2010 |
- 01:00 Inject and prepare fill or physics
- 04:30 Stable beams
- 07:30 End of fill: dump due to FMCM triggers following
EDF perturbation
- 11:00 Non linear chromaticity measurement and
off-momentum beta beating
- 14:30 Chromaticity measurement during the ramp.
- 16:30 Ramp-down and preparation for physics
- Ready for physics at ~21:00 but beam lost during the adjust phase
|
Presentation
at the 09:00 meeting
|
|
Friday 2nd April 2010 |
- 00:00 ready for injection for Physics fill
- 02:00 Lost half of the beam during the ramp (dump and
re-fill)
- 04:00 Ready to ramp
- 06:00 Collapsing separation bumps
- 06:37 Cryo lost in point 4
- 23:30 Recovered cryo conditions
|
Presentation
at the 09:00 meeting
|
|
Thursday 1st April 2010 |
- Nice Physics fill overnight
- Beam dump due to trip of QF.A12 at 05:05 (nQPS)
- 08:05 Trip of QF.A12 again after pre-cycle (nQPS)
- Pre-cycle
- 12:00-14:00 RF capture optimization
- 14:00-15:00 Ramp and squeeze. Beam lost at flat-top
(sequencer)
- 15:00-16:30 Precycle
- 16:30 - 18:00 Inject and Ramp
- 19:20 Squeeze to 9 m no losses. AC dipole measurement.
Losses on B1 during measurement
- 21:05 Squeeze to 7 m no losses
- 21:40 Squeeze to 5 m no losses
|
Presentation
at the 08:30 meeting
Cryogenics
status
|
|
Wednesday 31st March 2010 |
- Problems with the setting-up at injection over night and
in the first part of the morning.
- 09:15 - Lost ramp because of a problem with the
setting-up of the tune-feedback before starting the ramp
- 14:30 - Lost beam at the end of the ramp: tune feedback
active during chromaticity measurement
- 21:05 - Finally stable beams
- Luminosity scans done at all IPs
|
Presentation
at the 08:30 meeting
ALICE
ATLAS
CMS
LHCb
LHCf |
|
Tuesday 30th March 2010 |
- 01:10 - 03:00 Long fill with stable beam flag -
- 03:00 : dump beams
- 03:00 - 04:00 : Ramping down
- 04:00 - 06:00 : Back to 450 GeV - colliding bunch
pattern B1 (1, 17851) - B2 (1, 8911) - Perform all checks
- 06:00 : Start the ramp to 3.5 TeV
- 06:20 : Beams dumped : RQT12.R4.B1 tripped (PC)
- 07:00 - 08:00 : Ramping down
- 08:00 - 08:40 : Rolling back to 450 GeV and beam checks
- 08:40 : Starting ramp
- 08:50 : Lost sectors 81 and 12 - due to SPS QF-QD trip
- 08:50 - 11:15 : complete ramp (without beam) - Ramp down
- 11:15 : Recover
conditions at 450 GeV
- 11:52 - 12:38 : Ramping
- 13:22 : Declared stable beams at 3.5 TeV
- 13:22 - 16:30 : Stable beams
- 16:30 : Beam dumped by BETS. Energy tracking error on
switch generator # K
- 17:00 : Preparing for access for LDBS, then filling
again and stable beams at 3.5 TeV
- Accesses in the evening for LBDS and RQT12.R4B1
|
Presentation
at the 08:30 meeting
Presentation
at the 17:00 meeting
ALICE
ATLAS
CMS
LHCb |
|
Monday 29th March 2010 |
- 09:00: Filing 450 GeV with colliding bunch pattern -
DONE- All O.K.
- 10:45 am: Ramp #1 to 3.5 TeV with non colliding bunch
pattern - DONE.
- 12:00 : Continue end of fill tests - simulation of
asynchronous beam dump - DONE - Beam
debunched - Losses as foreseen
- 16:00 : Ramp #2 to 3.5 TeV: Test with stable beam flag
off /on - DONE -
- 16:20 : Continue end of fill tests: Energy off set to
verify containment of off-momentum losses in IR3 -
DONE
- 16:45: Ramping down the magnets to 450 GeV, preparing
for a short access in UA27 -
- 18:00 - 20:00 : Access in UA27 - Bad connector found on
the current lead RQX.R2 and fixed
- 20:00 - 21:00 : Recovering from access and beams back at
450 GeV
- 21:00 - 22:35 : Beam checks at 450 GeV
- 22:35 - 23:25 : Ramping to 3.5 TeV - non colliding
bunches
- 23:25 - 01:10 : Preparing for stable beams
- 01:10 - 02-30 : Fill with stable beam flag
|
Presentation
at the 08:30 meeting
Presentation
at the 17:00 meeting |
