|
Day |
Summary |
Link to report from morning meeting |
|
Monday 27th September |
- 09:30 End of fill measurements
- 11:00 access for tune monitor (BBQ) and quench heater power supply
repair
|
Slides from 08:30 meeting |
|
Sunday 26th September |
- Moved to adjust at 09.00. Fill luminosity > 1 pb-1
- End of fill studies
- TOTEM Roman pot test
- Refill for physics with the same scheme
- Capture problems for Beam 1 (finally traced with noise on the
voltage on Cavity 4B1)
- 21:30 Stable beams #1373 150ns_104b_93_8_93_8bpi
|
Slides from
9:00 meeting |
| Saturday
25th September |
- 09:40 Stable beams 150ns_56b_47_16_47_8bpi
- Beams lost at 11.00 with a fast loss when moving Roman pots
- LSS6 BPM for 104 bunches and transfer line checks
Scheme 150ns_104b_93_8_93_8bpi
- Fill lost at start ramp - TCDQ control problem (didn't move)
- Mods made to sequencer - experts need to look at this
- Fill 1372 in the evening, 104b scheme
- Stable beams from 19.30. Initial luminosity 3.5 1031
- Colliding beams overnight
|
Slides from
9:00 meeting |
|
Friday 24th September |
- 09.00 End of physics fill 1366
- Integrated lumi ~650 nb-1 in ~ 13h
- EOF studies:
- Extended lumi scans for emittance checks
- Wire scans provoked beam dump around 10.00
- ALICE polarity switch (dipole and solenoid)
- Test ramp and squeeze
- 21:50 MCBXH3.L8 trip ==> beams lost at the end of the squeeze.
- 22:30 - 04:00 Access for quench heater power supply repair
and WorldFip replacement
|
Slides from 8:30 meeting |
| Thursday
23rd September |
- 06:45 Beam dump - End of coast 1364 - ~170 nb-1
- 08:30 - 10:00 Access for Quench Heater Power supply repair
- 10:00 - 14:00 - Pre-cycle and prepare for physics
- 13:53 Beam dump due to TCDQ position reading error
- 14:00 ALICE dipole trip
- 17.30 Some delays from LINAC, then fill for physics
-
Scheme 150ns_56b_47_16_47_8bpi
- 19.00 Stable beams. Initial luminosities 2 1031cm. Corresponds to
ε
~ 2.2 µm.rad
- ALICE have a problem with parasitic collisions polarity mismatch between dipole and external Xing
bumps
|
Slides from 8:30 meeting |
| Wednesday
22nd September |
- 01:00 - 05:00 Asynch dump test: End of squeeze
- 05.00 - 08.00 Loss map off momentum (negative) before squeeze with
100/110 urad crossing angle
Final qualification tests certified OK by relevant experts
- 09:00 - 12:49 Verification of the interlocked BPM and preparation for
stable beams with 24 on 24 bunches
- 12:49 Fast loss in 8L7. Go for another ramp
- 17:04 Stable beams 24x24 - 4.6x1030 cm-2 s-1
initial luminosity
|
Slides from 8:30 meeting |
|
Tuesday 21st September |
- 01:00 - 04:00 Asynch dump test: End of squeeze -
beams lost before test .. spikes on QTF
- 04.00 - 09:00 Preparation for TOTEM alignment and loss map (ramp squeeze
collision with 1 nominal bunch per beam).
- 0900 - 16:00 TOTEM beam based alignment and loss map with TOTEM at
20(H)/18(V) sigma
- 16:00 - 21:00 BPM sensitivity switching tests, tests of the functions
for collimators
- 21:00 - 01:00 pilot run through ramp and squeeze with nominal bunch
intensity + beta beating measurements and k-modulation for IP8 + loss map off momentum
(positive) at the end of squeeze separated. BPM sensitivity switching test
when overinjecting.
|
Slides from 8:30 meeting |
|
Monday 20th September |
- Loss maps and asynchronous dump tests
- 08:30 QPS trigger in Sector 12 due to noise on RQ10.L2
- 10:30 Pre-cycle
- 13:00-15:00 Ramp (chromaticity measurement) and squeeze
- 15:00 - 18.00 Momentum collimation set-up and loss map
- 18:00 - 20:00 TCDQ test
- 20:00 - 21:00 Injection verification with 8 bunches
- 21:00 - 01:00 Asynch dump test at 3.5 TeV with crossing angles
reduced to 100/110 urad - unsqueezed - beams separated
|
Slides from 8:30 meeting |