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Day
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Summary
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Link to report from morning meeting
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Monday, 27th June
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08:30
meeting
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Sunday, 26th June
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- 08:30
Refill.
- 09:40
Stable beams #1895 1236b initial luminosity 1.15E33
cm-2s-1.
- 10:00
Beam dumped by vacuum in B2 IR4.
-
Increased vacuum intlk threshold from 4e-7 to 2e-6 on one IR4 gauge.
- 11:30
refill delayed by booster septum problem.
- 15:00
Stable beam #1896 1236b initial luminosity 1.15E33
cm-2s-1.
- 16:40
Beam dumped, lost sector 34.
- Access.
- 22:00
Injection
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09:00
meeting
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Saturday, 25th June
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- Stable beams ongoing.
- 13:09
Beam lost - cryo lost in Pt5. Integrated luminosity 45 pb-1.
- Access
for cryo, CMS, ALICE.
- Patrol
lost in Pt5 - as usual.
- 18:00
machine closed.
- 19:00
Injection.
- 20:31
beam dumped at start of squeeze due to SIS interlock on beam position wrt
TCSG. BPMSB.B4.R6B1 triggered when exceeding the limit of 1 mm (1.4 sigma).
- 21:30
Lost cryo in Pt5 for short moment while at injection. Pre-cycle.
- 23:00
refill
- 01:00
Stable beams #1893 1236b.initial luminosity 1.15E33
cm-2s-1.
- 01:40
Beam dumped by vacuum B2 in IR4. 1.8 pb-1.
- 03:00
Refill.
- 04:20
Stable beams #1894 1236b.initial luminosity 1.15E33
cm-2s-1.
- 06:30
Beam dumped by vacuum in B2 IR4. 8 pb-1.
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09:00
meeting
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Friday, 24th June
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- Preparing
to inject 1236. Small adjustments of the line steering for losses.
- 11:00
Stable beam fill #1889 1236b, initial luminosity
1.26E33 cm-2s-1.
- 13:45
fill #1889 dumped by AUG in TI2. 11 pb-1 integrated luminosity.
- Access
for AUG, QPS and RF.
- 19:20
Beam back
- 21:00
Controls problems during the squeeze.
- 21:31
Flat top with 1236b
- 22:53
Stable beams. Fill 1890 1236b,
initial luminosity 1.15E33
cm-2s-1.
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08:30
meeting
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Thursday, 23rd June
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- Recovery
ongoing. Access in various part of the ring.
- 18:00
Cryo back. Precycling.
- 20:00
Injection.
- 20:15
Lost sector 81. Fip comm. problem.
- 23:00
Injection steering, check of increased MKI pulse for B1.
- Overnight
loss maps. 2 klystron trips.
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08:30
meeting
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Wednesday, 22nd June
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- 02:00
Injection problem. Could be traced to an orbit correction on the SPS
flat top.
- No
beam from 08:30 to 12:30.
- Access.
- 16:30
Lightning strike during preparation for beam. Cryo Pt8 lost compressor,
all sectors off, etc etc
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08:30
meeting
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Tuesday, 21st June
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- Analysis
of bunch by bunch injection oscillations from the previous fill reveals
that the B1 injection kicker may not be timed correctly - last bunches seem
to be kicked in V plane. Injection kicker pulse length increased by 200
ns on B1.
- 18:15:
fill #1883 dumped by SIS interlock (OFSU down), 47.5 pb-1 in around 18
hours.
- Refill
delayed due to RF problems (noise) in the SPS.
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08:30
meeting
Cryo
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Monday, 20th June
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- Cryo
recovery. One compressor in Pt8 vibrates and is noisy - possible source
of the oil filter clogging.
- Beam
screen bake-out on standalone magnets in IR8 (Q5, Q6).
- 9:00
cryo back - pre-cycle.
- 21:00
Injecting, steering TI2 and TI8.
- 23:00
Filling 1092 b.
- 00:15
Stable beams fill #1883 initial luminosity ~ 1.1E33
cm-2s-1.
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08:30
meeting
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