One of the new collimation crystals (installed at point 7 during YETS) is stuck in the beampipe. This will add a ~week delay to first beams.
Caverns are still closing today. Injection tests scheduled for Friday.
Search found 165 matches
- Wed Mar 22, 2023 9:47 am
- Forum: The Accelerator
- Topic: 2023 Operation
- Replies: 16
- Views: 57987
- Fri Mar 17, 2023 10:55 am
- Forum: The Accelerator
- Topic: 2023 Operation
- Replies: 16
- Views: 57987
2023 Operation
Full 2023 schedule: https://edms.cern.ch/document/2785501 We are mid-way through the "hardware recommissioning" stage after YETS. This week have been powering tests, handshake tests, beam mode tests etc. From next week, you can follow along with the commissioning spreadsheet linked at the top of the...
- Mon Nov 28, 2022 3:28 pm
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
Well, show's over for this year, as of 6am.
40 /fb delivered to ATLAS and CMS (target was 25 /fb)
Availability was fairly poor following the ion test, although the definite low-light of the year was the 4 weeks lost due to the cooling plant problem at point 4.
40 /fb delivered to ATLAS and CMS (target was 25 /fb)
Availability was fairly poor following the ion test, although the definite low-light of the year was the 4 weeks lost due to the cooling plant problem at point 4.
- Thu Oct 06, 2022 8:31 am
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
- Tue Oct 04, 2022 3:44 pm
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
LHCb wanted to partially-insert the VELO (to 10 mm separation) today, but it was unable to fully recover from a power-cut at the data-centre.
- Fri Sep 23, 2022 9:26 am
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
Looking to next year, if the energy crisis continues, YETS 2023-24 may begin at the end of October. In the longer term, we may see a general "optimisation" (reduction) in the physics programme. Expect more news after the Council next week.
- Tue Sep 20, 2022 7:05 am
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
I'd expect there are detailed contingency plans for what can be de-energised and for how long and to what schedule, or even a short term sacrifice of some programs/facilities as an interim measure given the changing situation in europe. I haven't held back on details. The only info I can find are "...
- Mon Sep 19, 2022 9:21 am
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
As people may have seen (oddly from the news media rather than directly from CERN), the energy crisis this winter may impact the accelerator complex on short time-scales if EDF requests it: https://www.wsj.com/articles/europes-energy-crunch-squeezes-worlds-largest-particle-collider-11662294416 More ...
- Fri Sep 16, 2022 9:05 am
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
A few updates regarding the schedule.
The LHC should be ready for beam again on Tuesday 20th September
Due to the upcoming winter energy crisis, YETS is brought forward 2 weeks to Monday 28th November.
Whether or not we have a heavy-ion run this year is still TBD.
The LHC should be ready for beam again on Tuesday 20th September
Due to the upcoming winter energy crisis, YETS is brought forward 2 weeks to Monday 28th November.
Whether or not we have a heavy-ion run this year is still TBD.
- Mon Aug 29, 2022 10:12 pm
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
The most recent schedule is always linked near the top of https://lpc.web.cern.ch/
- Mon Aug 29, 2022 1:55 pm
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
This week is being used for access ("part 1 of TS1" if you like), next week will be some OP tests (apparently access not possible) and what remains of TS1 goes ahead as planned the following week. Expect return to operations on/after the 16th September
- Wed Aug 24, 2022 1:55 pm
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
Cooling plant at point 4 stopped last night, leading to failure in RF cryo. Three pressure release disks ruptured!
No beam for approximately 4 weeks
No beam for approximately 4 weeks
- Tue Aug 16, 2022 9:44 am
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
the remaining runs appear to be geared towards confirming the Standard Model rather than discovering new physics as was hoped for You make it sound like we've stopped looking for new physics, which is absolutely not the case. Even "confirming the Standard Model" is itself a way of looking for new p...
- Thu Aug 11, 2022 7:47 am
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
Well we had 2556b fills (with 144b trains) in Run 2. Certainly 240-bunch trains are much longer than before.
According to the Evian/Chamonix 2021 slides, the number of bunches may get up to 2748, depending on the heat load.
According to the Evian/Chamonix 2021 slides, the number of bunches may get up to 2748, depending on the heat load.
- Sun Aug 07, 2022 10:29 am
- Forum: The Accelerator
- Topic: 2022 Operation
- Replies: 80
- Views: 375167
Re: 2022 Operation
Are we really behind schedule? It says 1200b on 4th August, and we were already at 1900b by then.
I heard that the trouble with RF on Friday night was almost enough for them to abandon the night shift, but it seems to have been fixed in the end, albeit continuing on 1900b instead of 2100b.
I heard that the trouble with RF on Friday night was almost enough for them to abandon the night shift, but it seems to have been fixed in the end, albeit continuing on 1900b instead of 2100b.