Weekly Meeting

Monday 23 Mar 2026, 09:00 → 09:30 Europe/Rome

Davide Fiorina (GSSI & INFN)

https://cern.zoom.us/j/9553247390

Rolling Report

1 Previous week recap

Speaker: Davide Fiorina (GSSI & INFN)

Previous week recap (by person) — week of this meeting

Davide F.

• O₂ and H₂O sensor procurement remained blocked: vendors promised required documents, but no feedback received yet.
• Requested a quote for the new HV cable from an Italian supplier.
• PRA update with NIER stalled; planned to re-ping due to no feedback.
• Planned a 3-day Frascati trip starting tomorrow to mount the first GEM stack (if remaining issues are solved).
• Awaited LNGS crane-team feedback (via Cesidio) to clarify the copper-box movement procedure.
• Continued reviewing Antonio’s copper-box work-in-progress.
• Trigger-module test bench slipped and was postponed to next week.
• Performed Hall F routing inspection with technicians and LNGS services; follow-up organization pending.

Giorgio

• No major analysis update; minor digitization updates from Igor.
• Met with Edward Shields and Federico to explore improvements for diffusion deconvolution.
• GEM premounting looked acceptable even with bent bandelle; final confirmation pending full mounting.
• Identified field-cage foil issue (missing securing holes) and scheduled triage for tomorrow.
• Confirmed GEMs repaired and ready; transport back still pending with Luigi.
• Continued replying to reviewer comments on the field-cage paper (with Alex).

Stefano

• Received no reply from both contacts regarding the Rb-83 source.
• DAQ meeting held: discussed N₂ gas-tightness tests and operating overpressure (~3 ± 2 mbar).
• New DAQ validated in a long MANGO data-taking run; performance OK so far.

2 DavideP report

Speaker: Davide Pinci (Istituto Nazionale di Fisica Nucleare)

• Fantini company:
  • is asking for news about final designs;
  • a possible time slot to machine the copper is soon after Easter;
• Bussetti  was informed about the successful gas tightness test;
• 3 FanINFanOut confirmed at LNF

3 Elisabetta report

Speaker: Elisabetta Baracchini (Istituto Nazionale di Fisica Nucleare)

4 DavideF report

Speaker: Davide Fiorina (GSSI & INFN)

Weekly Summary

GEM stacks and assembly

• The first GEM stack was successfully assembled at LNF, but an alignment issue was found between the inner and the external frames.
• The agreed fix is to slot all external-frame holes by 2 mm per side on both GEM stacks.
• Tecnoalarm will machine the modified parts, and Daniele will provide updated drawings by 23/03.

GEMs and cathodes from CERN

• GEM3 showed critical issues: the v-bond created some short-circuited protection resistors.
• CERN confirmed that new GEMs for the second stack will be shipped soon.
• CERN is also remaking the cathodes; the team is ready to contribute 400 CHF, provided all edges/tips are rounded for safe 50 kV operation.

Copper box movement in Hall F

• A Hall F inspection confirmed that the copper box can be transported already assembled into the experimental area.
• The current plan uses a remote-controlled crane + mobile air cushion, with an estimated cost of about 5 k€.
• DavideF must verify with SPP and LNGS Technical Coordination whether temporary removal of corridor wall sheets is allowed and what documentation is required.

Copper drawings

• A way was found to unblock the copper drawing workflow after the stall.

Field cage, setup, and infrastructure

• For the field cage, missing closure holes may be added using a dedicated punching tool designed by Daniele.
• Work progressed on the pre-commissioning infrastructure, though some 30x30 Bosch aluminum profiles are still missing.

Other follow-up items

• A broader Hall F inspection with the full team should be organized later, though it is not urgent.
• DavideF still has to check HV cable compatibility in Hall F and discuss a possible thin PMT window solution with Giorgio.
• The team should also check whether the second GEM shipment can use an already planned CERN transport on 01/04.

5 Giorgio report

Speaker: Giorgio Dho (Istituto Nazionale di Fisica Nucleare)

Analysis

• Main news is from Luan who will optimize digitization for quest high gain and low gain and fusion and has implemented Atul's variables to test ER/NR discrimination.
• Analysis meeting on Thursday (presentation from Luan expected)

 

LNF

• Per i PMT, come vogliamo testarli e validarli?
• Chiedere a Luigi di scrivere per la modifica dei catodi (Farò appena dopo il meeting)

 

Altro

• Mi hanno chiesto di fare il talk su dark matter direzionale a CSN2 ad aprile.  Buona pubbicità

6 Stefano report

Speaker: Stefano Piacentini (GSSI and INFN LNGS)

7 Giulia report

Speaker: Giulia D'Imperio (Istituto Nazionale di Fisica Nucleare)

• dedicated simulations of the 8 keV xrays from GEM copper available on the cloud. Emanuele/DavideP will digi-reconstruct and analyze them.
• Emanuele is investigating the possibility to use the cnaf queues from a dedicated cnaf account (instead of using the notebook)

8 Fabrizio report

Speaker: Fabrizio Petrucci (Istituto Nazionale di Fisica Nucleare)

9 Andrea report

Speaker: Andrea Messina (Istituto Nazionale di Fisica Nucleare)