2023 Operation

[dukwon]

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 LPC page: https://lpc.web.cern.ch/

This year the plan is 49 days of commissioning and intensity ramp, 97 days of pp physics from mid-May, 27 days of PbPb physics from late September.

Next YETS will start at the end of October due to the energy crisis.

Lumi targets are anywhere from 60 to 80 /fb for IP1&5, 7 /fb for IP8, 30 /pb for IP2.

[jmc2000]

153rd LHCC Meeting - OPEN Session
https://indico.cern.ch/event/1254283/

Page 14 of the Status of Accelerator document shows 1.3fb/day for 2023, if I understand things correctly, an improvement from 1.1fb/day for 2022. I was under the impression that it was around 0.8fb/day in 2022.

Jmc

[dukwon]

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.

[dukwon]

Beam 1 threaded to IP5 before LBDS problems

Beam 2 successfully circulating

[dukwon]

Both beams

[dukwon]

FIrst ramp of the year

[dukwon]

First collisions in 2023 with 450 GeV beams

[dukwon]

https://home.cern/news/news/accelerator ... m-back-lhc

[M.]

First collisions at low-beta* - 1.2m.

Followed by the first beta* levelling with colliding beams from 1.2m down to 30cm in ATLAS and CMS.

[M.]

First Stable Beams @ 1.2m -> 30cm!

Now for the intensity ramp-up...