TREX 06-04-2022 Preliminary minutes (zoom meeting recorded by FSG)

• Matter arising - VELO discussion (LMC request - likely end of week 15 or beginning of 16)

Totem PPS

• Totem PPS status presented by Joachim
• Readiness of the available detector installation - OK
• Not complete spectrometer installed (3/4 of Si-Pixels installed).
• Reparation of the Si-pixel ongoing (wire bond thermo-mechanical stress issue).
• Reinstallation by TS1 May 2022
• Alignment run to be seen

Q-FSG - How long would take the May installation

A-JB - 2.5days based on the experience (installation and connection of all the services)

Q-JS Alignment of the XRPs is only related to the detector package or full pot units?

A-JB To be seen based on the beam position, but it is possible. Standard approach will apply (x-rays of the VMs)

Q-MBM Next YETS planning?

A-JB - No special request on the top of the standard maintenance.

AFP ALPHA

• ARP status presented by Ivan Lopez.
• ALPHA ready for 2022 commissioning.
• AFP with new detector packages, TOF detector upgraded.
• Motherboard replacement strategy - during YETS if necessary (1-2 per day);
• New design of the AFP pot allows to intervene on PMT without breaking the secondary vacuum.

C-JS the same x-rays strategy as for Totem PPS applies.

C-MR - Slides missing on then INDICO

ZDC

• ZDC status presented by Sorina.
• Activities are foreseen for TS2.
• Installation of the ZDC before high intensity run.

Q-MBM - TS activities are for special TS LHCb or TS2

A-SP - Activities foreseen TS2 - September 2022

SND

• Installation of the SND presented by Pablo.
• Detector and infrastructure ready.
• Commissioning ongoing, accesses during the TS foreseen.

Q-FSG - Emulsion bricks are still empty.

A-PSD - Will be installed tomorrow.

ZDC-RPD

• Comprehensive status of the ATLAS ZDC presented by Riccardo Longo.
• Services ready for Run3.
• Installation foreseen TS before the heavy ion run (September 2022?)

C-FSG - Detailed discussion is needed (Francisco will organize this one).

C-MR - Documentation should be uploaded to ATLAS repository.

A-RL - It will be corrected.

Q-SP - ZDC team should be on the loop of these activities to avoid any schedule issues.

A-FSG - TREX will include the ZDC team on the loop.

BRAN

- No comment / feedback provided at the moment.

FASER

• Status of the Faser provided by Brian.
• All YETS foreseen installation activities completed.
• Special access for FASERnu box replacement scheduled for July 18th 2022.
• Removal of the final box during the TS.
• No activities for the YETS at the moment.

Q - FSG - Is the special access coordinated with Jorg?

A-BP - Yes it is.

---

Minutes written by J. Sestak 06-04-2022