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Description
● Previous week recap
Previous week recap (by person) — week of this meeting
Davide P.
- Planned PMT testing ramp-up: tutorial on procedures/data analysis with Stefano and Rita S, plus organizing the first test session.
- Opened AU-team follow-ups on RAD7 shipping from LNF and radon studies (via Robert Gregorio).
- Confirmed key meetings: general meeting (Thu 23, 14:00) and INFN referees update (week of May 4).
Davide F.
- No definitive fix found for GEM tensioning; decided to test current “acceptable” tensioning before further rework.
- Received Hall F copper-box transport quote (€6.8k) and identified need for a portable crane for internal handling (~€2k).
- Tracked dewar wheel retrofit at LNGS workshop (expected ~2 weeks) with support from Maccarrone for testing.
- Prepared DAQ pre-commissioning by receiving all DAQ equipment at LNF (expected today).
- Selected a new oxygen-sensor vendor (+€2k) and proceeded.
Giorgio
- Continued digitisation optimisation (Luan) and moved toward ER/NR discrimination; noted lack of oxygen in Run4 low gain.
- Engaged PMT analysis support (Rita Sousa) and awaited Federico’s updated PMT characterisation code/README.
- Planned retrieval/inspection of GEMs and cathodes from magazzino.
- Requested officina production of the field-cage hole-punching tool.
- Finalised data analysis for the V-bond saturation paper and awaited PubCom reply on the FC paper.
Stefano
- Secured Münster availability to provide an Rb-83 source (free); started resolving container and lab-activity constraints (container specs requested from Riccardo Biondi).
- Confirmed DAQ camera issue is camera-level; fix drafted but still unvalidated under bright conditions.
- Resolved trigger-module MAC-address blocker; rescheduled tests pending Herman’s return.
- Noted missing Renga valves at HdM/LNGS.
Giulia
- Reported Field Cage and GEM simulation status; identified remaining geometry misalignments to resolve with Davide F.
- Continued improving LIME 55Fe simulations with realistic calibration geometry.
● DavideP report
- May 4th, meeting with referee 15:00;
- by May 8th, insert SJ request in CSN2 DB (meeting May 22nd);
● DavideF report
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First GEM stack: mitigation for the tensioning has been tested; the latest configuration uses 4 mm bending of the external frame. If frame relaxation causes loss of GEM tension, a more drastic solution will be needed, but the current expectation is that this should be sufficient.
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Nylon structure / copper box interface: Cesidio identified an alignment issue between the nylon structure and the calibration holes on the copper box. The mitigation is to change the position of the nylon crossbar.
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Field cage: the punching tool is working as intended. After soldering the resistors, the team will proceed with the assembly test.
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Second GEM stack: assembly slot scheduled for Thursday.
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Cathodes from CERN: still waiting for the new cathodes, since the previous ones were not produced according to the design.
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O₂ sensors: procurement is proceeding smoothly with the new vendor.
● Giorgio report
Analysis
- Meeting with Melba Elisabetta and Stefano to better define the neutron measurement direction
- Students at LNF will likely provide the barreling correction (part of their lab course)
- This Thursday meeting
- Davide and I will try to meet Rob and Ali this week (hopefully)
LNF
- 4 PMTs tested by Giulia
- Met with Rita Sousa to analyze PMT data
- LNF has 4k or 3k in "consumo" and 2k in "altro consumo". 7.5k are subjudice.
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