🗓 Weekly Coordination Meeting

23/03/2026

Davide P.

Fantini: requesting updates on final designs; potential copper machining slot soon after Easter.
Bussetti informed about the successful gas-tightness test.
Fan-in/fan-out: 3 units confirmed at LNF.

Davide F.

GEM assembly: first GEM stack assembled at LNF; alignment issue found between inner and external frames.
Fix agreed: slot all external-frame holes by 2 mm per side on both GEM stacks; Tecnoalarm to machine; Daniele to deliver updated drawings by 23/03.
CERN GEMs/cathodes: GEM3 has critical issues (v-bond causing shorts on protection resistors). CERN confirmed new GEMs for the second stack will ship soon. CERN also remaking cathodes; team ready to contribute 400 CHF provided all edges/tips are rounded for safe 50 kV operation.
Copper box movement (Hall F): inspection confirmed the box can be transported already assembled into the experimental area. Plan: remote-controlled crane + mobile air cushion; estimated cost ~€5k. Davide F. to verify with SPP and LNGS Technical Coordination whether temporary corridor wall-sheet removal is allowed and what documentation is required.
Copper drawings: workflow unblocked after the stall.
Field cage/infrastructure: missing closure holes may be added using a dedicated punching tool designed by Daniele. Pre-commissioning infrastructure progressing, but some 30×30 Bosch aluminum profiles still missing.
Follow-ups: organize broader Hall F inspection with full team later (not urgent). Check HV cable compatibility in Hall F. Discuss thin PMT window solution with Giorgio. Evaluate whether the second GEM shipment can use an existing CERN transport on 01/04.

Giorgio

Analysis: Luan optimizing digitization (Quest high/low gain and Fusion), implemented Atul’s variables for ER/NR discrimination tests.
Analysis meeting on Thursday with expected presentation from Luan.
PMTs: open question on how to test/validate; Giorgio to ask Luigi to write regarding cathode modifications (action right after meeting).
Outreach: asked to give a directional DM talk to CSN2 in April.

Giulia

Simulations: dedicated simulations of 8 keV X-rays from GEM copper available on the cloud; Emanuele + Davide P. will digi-reconstruct and analyze.
Computing: Emanuele exploring use of CNAF queues via a dedicated account (instead of notebook-based running).

16/03/2026

Davide F.

O₂ sensor procurement: vendor promised required documents; still no feedback received.
H₂O (humidity) sensor procurement: vendor promised required documents; still no feedback received.
HV cable: quote requested from an Italian supplier.
NIER (PRA update): no feedback last week; will re-ping.
Frascati trip: meeting tomorrow; staying 3 days; goal is to mount the first GEM stack (if remaining issues are solved).
Copper box movement: tomorrow Cesidio to provide feedback from LNGS crane team (if any) to clarify movement procedure.
Copper box: review of Antonio’s work in progress ongoing.
Trigger module test bench: postponed to next week.
Hall F: inspection with technicians and LNGS services to finalize routing paths; next steps to be discussed/organized.

Giorgio

Analysis: no major update; small updates from Igor on digitization and checks with analysis.
Metrology/analysis improvement: meeting today with Edward Shields + Federico (3-month grant) on possible diffusion deconvolution improvements.
GEM assembly readiness: premounting looks OK even with bent bandelle; final confirmation pending real mounting.
Field cage foils: missing holes to secure in position; plan to assess tomorrow how to fix/handle.
GEMs repaired and ready; waiting for Luigi to arrange transport back.
Paper on field cage (Alex + Giorgio): replying to reviewers.

Stefano

Rb-83 source: no reply from both contact persons.
DAQ: meeting last week; discussed gas tightness tests with N₂ and operating condition of ~3 ± 2 mbar overpressure.
DAQ: new DAQ tested in long MANGO data taking; performance OK so far.

09/03/2026

Davide P.

Trigger module: Herman ready; this week he will assemble the 50 Ω termination resistors in the Trigger Module.
Gas system validation: source flange + new O-ring tested successfully; 1/8" gas connectors tested successfully up to +3 mbar.
CAD workflow: 3DExperience permissions issue is slowing the closure of the copper box drawings.

Davide F.

Humidity sensor: current provider cannot work with Public Administration; searching for an alternative supplier.
O₂ sensor: waiting for quote and required documents.
Copper box drawings: 3DS issue solved; Antonio to provide the drawings this week.
Inner GEM frames: retrofitted by Tecnoalarm; assembly test scheduled for tomorrow.
Rometec order: first batch submitted.
Hall F: inspection/walkthrough with technicians and LNGS services to finalize service routing paths.
Water tanks: new transport to LNF today.
This week: preparing the setup for Herman to test the trigger module.
LN2 line requirement: should be a continuous copper line (not stainless steel / Swagelok).

02/03/2026

Davide P.

Mouser components: both batches now at LNF.
1/8" gas connectors: shipped to LNF via TNT (tracking MY17155749).
Source flange + new O-ring: successfully tested on the vessel.
Tecnoalarm: bandellas reshaped; still imperfect fit on reference—Daniele’s small modification to be tested today.
Nylon66 structure: almost reshaped; residual 1–2 mm sagitta under recovery attempts.
Copper-box handling: meeting today with Franco Tacca (LNGS tunnel handling).
Hardware at LNF: nitrogen MFC arriving tomorrow; HV box arriving tomorrow for tests.

Davide F.

Rometec (affidamento a consumo): finally active; issues/misunderstandings to be reviewed today.
O₂ + humidity sensors: still waiting for required procurement documents.
Gas supply at LNGS: place gas order this week.
LN₂ + filters integration: waiting for NIER feedback.
Copper-box movement in Hall F: this week aim to close/review the movement procedure with Cesidio; execution to be handled by LNGS services.
Copper-box drawings: Antonio + Filippo finalizing; 3DExperience workflow issues causing delay.
GEM inner frames: re-machined by Tecnoalarm but still non-compliant; new intervention with Daniele + Tecnoalarm planned today.
Directionality paper: submitted to PubCom.
HFO paper: corrections still in progress.

Fabrizio

Simulation paper: accepted with minor revisions; will forward reviewer comments to PubCom and start revisions; resubmission deadline March 12.
PD2025 proceedings: deadline March 4 was missed/overlooked; will attempt to complete 5-page document today and submit if still possible.

Andrea

arXiv:2602.02694 (sub-GeV DM with hydrogen) does not cite CYGNO; authors agreed to correct in v2.

16/02/2026

Davide P.

Mouser components: second batch delivered to CERN; transport to LNF agreed with Benussi.
Gas connectors: arrived at RomeTech; shipment to LNF chosen.
Bussetti: material sent back to LNF and already arrived.

Elisabetta

Identified a storage location for LIME copper in the LNGS GSSI lab; coordination ongoing with GSSI colleagues on storage arrangement.

Davide F.

O₂ + humidity sensors: procurement started (quotes requested), budget ~€15k.
Gas supply: plan to procure He and CF₄ bottles at LNGS using remaining 2025 budget.
NIER/PRA: collaboration started; multiple documents/feedback to be delivered to NIER.
Water pool/integration: procedure fully reviewed with Cesidio; Environment Service supports using existing resin + silicone edge sealant (no extra resin layer) → major simplification.
CYGNO-04 handling workflow: finalize PE + copper-box handling procedure (our side) this week; discuss crane/technical aspects with Franco Tacca and expect feedback by end of week; keep ~€10k contingency for cranes (likely not needed).
Logistics: close Cu+PE package and send to Fantini, with PE as priority.
Water tanks: first availability indications; top cable-entry space feasible; cost estimate ~€20k (market dependent).
Simulation inputs: volumes + weights for all CYGNO-04 components available; align with Giulia on how to update simulation.
Papers: supporting Melba on final HFO comments; directionality draft trimmed.