Bari pixel meeting

Friday 4 Apr 2025, 11:00 → 13:10 Europe/Rome

zoom link: https://cern.zoom.us/j/69218434153?pwd=gZBaCe7AmqsFbSGxlteyKbfQwumFeg.1

 

Passcode    032489

11:00 → 11:30 status and actions for finalisation of micro-ITS3 paper

Speakers: Giovanni Francesco Tassielli, Shyam Kumar (Istituto Nazionale di Fisica Nucleare)

PerTestBeam-Analisi-Update.pptx

11:30 → 11:50 update on the baby-moss measurements in Lab

Speakers: Angelo Colelli (Istituto Nazionale di Fisica Nucleare), Francesco Barile (Istituto Nazionale di Fisica Nucleare), Francesco Barile (INFN Ba), Rajendra Nath Patra (Istituto Nazionale di Fisica Nucleare), Rajendra Nath Patra (Variable Energy Cyclotron Centre, Kolkata, India)

babyMOSS_testing_Bari_040425.pdf

11:50 → 12:00 short update on OpAmp paper

Speakers: Angelo Colelli (Istituto Nazionale di Fisica Nucleare), Francesco Barile (Istituto Nazionale di Fisica Nucleare), Shyam Kumar (Istituto Nazionale di Fisica Nucleare)

OPAMP_Paper_Update_Bari_Pixel_Meeting_20250404.pdf

TestBeamAnalysis_INFNBari_4Apr25_Shyam.pdf

12:00 → 12:20 short update on the medical applications

Speakers: Domenico Colella (INFN and University of Bari), Dr Fabio Colamaria (INFN - Sezione di Bari)

PixelChamber_A9_BondingScheme.pdf

 

• Intraoperative probe
  • First working assembly succesfully completed --> To be characterized 
    • New MOSAIC firmware and software (by G. de Robertis) now available --> Fabio's availability after QM
    • Next to next steps: measurements using radiotracer at ITEL, to be defined
  • Worth to start asking for a design of a stick to be used to handle the probe, which allocates the USB-C cable
• Compton Chamber
  
  • Carrier board received
    
    • Clock lines routing error --> Solved through a modified wire-bonding and usage of available and unneeded pad-strips. Require small intervantion on the board: one board prepared
    • Support during sensor gluing and wire-bonding: design completed, soon under machining in workshop 
  • A4 using ALTAI (50 um thick) to validate the loop shape done and loop shape validated
    • Giovanni explored theusage of clamp flag option that close the clamp not at the apogeo of the loop but only after having reached the required lenght of the wire, allowing for a loop shape way lower than before.
  • Wire-bonding scheme based on ITS2 OB-HIC module defined (attached slides) --> To be validated
  • Next steps: 
    
    • A4 assembly with mid quality sensors for board validation --> Waiting for board support tooling
    • (if everything verified) full A9 assembly with good quality sensors
    • Measurements with radioactive source + Measurements at beam facility (under investigation Bergen)
• Abstract for a Poster submitted to EuNPC focusing on both projects

12:20 → 13:00 AOB (planning of conferences, ITS3 mechanics, ALICE3, SVT, … )

Speakers: Angelo Colelli (Istituto Nazionale di Fisica Nucleare), Domenico Colella (INFN and University of Bari), Domenico Elia (Istituto Nazionale di Fisica Nucleare), Francesco Barile (Istituto Nazionale di Fisica Nucleare), Triloki Triloki (INFN Bari Italy)

ITS3_dcolella_20250404_WP4meeting_Bari_Super-ALPIDE.pdf

OldVacuumSetupRecovery_1.jpeg

OldVacuumSetupRecovery_2.jpeg

OldVacuumSetupRecovery_3.jpeg

OldVacuumSetupRecovery_4.jpeg

PixelChamber_A9_BondingScheme.pdf

PresentVacuumSetup.jpeg

• ePIC SVT
  • New tooling for sensors handling and for support structures gluing available
    • Small further modification requested: additional vacuum hole for the main vacuum base + claps to hold the longherons during gluing procedures
  • Completed third HB-L0 --> Details in the slides
    • One of the two silicon pieces broken, probably due to an already existiging crack
  • Started a new assembly on Thursday 3/4
  • Start procurement of useful materials: Silicon pieces, carbon foams and carbon fleece

 

• ITS3 Super-ALPIDE
  • Attempt to build first working super-ALPIDE
  • Problem during wire-bonding with FPC
  • High current observed after bonding on one of the two sensors --> all wires disconnected for this problematic sensor
  • Characterization of second sensor started
    • One problematic DAC (VRESETD)
    • No data during digital and threshold scans
  • Next steps to be defined:
    • possibility to use old mandrel for new bending to keep working on the previous one
    • if willing to continue, need to collect some material from Strasbourg

 

• UHV setup
  • Setup recovered after UPS installation
  • Old spherical chamber equipped with TMP from Vincenzo Variale and (very) old pressure gauge and RGA --> Succesful! (Attached pictures)
    • Setup required by Nicola Mazziotta for fiber scintillar assembly
    • This setup also useful for spattering studies
  • New setup for IRIS protype outgassing characterization under discussion
    • A double vacuum with controlled pressure difference (maximum 50 mbar) is required