Search found 163 matches

by dukwon
Fri Mar 08, 2024 12:43 pm
Forum: The Accelerator
Topic: 2024 Operation
Replies: 3
Views: 144

2024 Operation

New year new beams
udp ..multicast-bevlhc1 1234 - VLC media player 24-03-08_12 46.png
by dukwon
Thu Aug 03, 2023 9:31 am
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

The repairs went well, and the cooldown is in progress. We expect beams back on 11th September: a few days of machine checkout, followed by low-intensity protons — VdM, high-beta, pp reference fun at 2.68 TeV — then ion run.
by dukwon
Tue Jul 25, 2023 5:01 pm
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

The leak was indeed found on Monday (1.6 mm hole just about visible in the close-up pic below). Work is ongoing to replace the damaged bellow. Time is really critical, as the longer this intervention takes, the bigger the risk of damage to the cryo system. If it takes too long, the whole sector will...
by dukwon
Mon Jul 24, 2023 5:13 pm
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

Screenshot from 2023-07-24 19-06-09.png
Screenshot from 2023-07-24 19-06-09.png (12.88 KiB) Viewed 49476 times
This sounds promising and suggests that they might not have to warm up the sector, but we will hear more in the next few days.
by dukwon
Fri Jul 21, 2023 11:58 am
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

Vibration tests have shown an "a clear anomaly" at a particular interconnect, which is likely where the leak is. X-rays were performed at that location but were inconclusive. The current plan is to open up the W-bellow at that location on Monday and see what's there. The longer-term plan will depend...
by dukwon
Thu Jul 20, 2023 1:46 pm
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

Rather than doing my own write-up: here's an official one

https://home.cern/news/news/accelerator ... leak-major
by dukwon
Wed Jul 19, 2023 7:18 pm
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

lhc1.png
On Sunday night the LHC experienced an electrical perturbation, causing an RF trip (P4) and several magnet quenches close to P8. As a consequence, the pressure in the insulation vacuum increased, which indicates a possible leak (unsure if it is air or Helium).
by dukwon
Wed Apr 05, 2023 2:45 pm
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

First collisions in 2023 with 450 GeV beams
by dukwon
Wed Mar 29, 2023 8:41 pm
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

FIrst ramp of the year
by dukwon
Tue Mar 28, 2023 10:29 am
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

Both beams
by dukwon
Tue Mar 28, 2023 9:25 am
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

Beam 1 threaded to IP5 before LBDS problems

Beam 2 successfully circulating
by dukwon
Wed Mar 22, 2023 9:47 am
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

Re: 2023 Operation

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.
by dukwon
Fri Mar 17, 2023 10:55 am
Forum: The Accelerator
Topic: 2023 Operation
Replies: 16
Views: 57699

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...