U.S. ATLAS HL-LHC Upgrade Level 2 and Deputies-NSF only Management Mailing List

[Anyes Taffard <anyes.taffard AT cern.ch>]

Hi Gustaaf,

Thanks for the comments.

I’ve address most of them but need some clarifications with the schedule. See inline

On Jun 27, 2025, at 07:21, Gustaaf Brooijmans <gusbroo AT nevis.columbia.edu> wrote:

Hello Anyes,

Looks good.  A few suggestions:

-sl 4: the title doesn’t really match the slide.  Maybe change to “ATLAS Muon System”?

Done

-sl 5: Please indicate where the MDTs are - you have everything labeled in the figure except the MDTs; the bottom figure labels are unreadable.

Done

-sl 8: UM could be many things, so expand a bit (maybe also UCI => UC Irvine)

Done

-sl 11: external dependencies for 6.6.3…

It’s there - 1st line - ain’t any

-sl 13: maybe start with “All chambers built and shipped to CERN”; Missing “year” at the very end of the slide

Done

-sl 14: please change commissioning to integration; either 2 BIS1 or 4 …

Done

-sl 16: define VS

Done

-sl 17: what do you mean by “risk mitigation before launching pre-prod”?  Define MDTTP (or maybe better don’t use it, just say L0MDT)

The SM rev and CM prototype v2 have the FDR changes, so there are essentially test pre-production boards.

-sl 26: for the TDC you don’t say what you did with the risks listed

Done

-sl 27: the 255/241 is for CSM, not L0MDT!!  (See the spreadsheet we sent.)  This may also invalidate your statement on the previous slide about main remaining risks…

I don’t quite understand why we now have 255 wd float for CSM

Last year we had 6 days

We added ~1 yr to account for LS3 date change but we lost 1 yr in pre-production. 

Last year the float was computed between these 2 tasks below and we had 11 WD float.

- CSM WS (CSM2790 ) ends on Dec 15 2025

- And CSM2810EX Jan 2 2026

As of May 2025:  

- CSM WS (CSM2790 ) ends on June 19 2026

- And CSM2810EX June 19 2026.

According to ATLAS schedule

- MDT Elx for endcap require June 3rd 2026

- MDT Elx for BIL required Nov 2nd 2026

- The Endcap installation starts on mid July 2026

So unless you change the dates on how the float is calculated I don’t understand why this number is now so large.

In the backup p60, I have the detail plans for production batch delivery. 

For L0MDT, the 289 wd come from L0MDT5460

-sl 34: deliverable*s* leverage; the 241 is for CSM, see above; progress has been made

Done

Best,

-a

Best,

Gustaaf

On Jun 26, 2025, at 08:18, Anyes Taffard (via usatlas-hllhc-l2deputymgmt-nsf-l Mailing List) <usatlas-hllhc-l2deputymgmt-nsf-l AT lists.bnl.gov> wrote:

Hi all,

The Muon L2 slides are posted in Doc DB #1892 and linked to the indico agenda.

Best,

Anyes