Discussion on the Characterization of AIDAInnova Related Productions

Requested: Second week of the test beam, starting October 8th

• Test beam crew list (PLEASE SUBSCRIBE):
  • Crew List (Google Sheet)
• Test beam detailed equipment and DUT list:
  • Equipment & DUT List (Google Sheet)
• Zurich Wiki for sensors:
  • UZH Silicon Wiki

Devices Under Test (DUT)

• TI-LGADs (V1):
  • Proposed list of devices from Iskra's talk attached in the indico. Priority: V1.
  • Fluence points: 1.5E15, 2.5E15, 0 (from UZH). Need to add and check 0.8E14 sample.
  • We need to calculate how much time is required per batch (at least 3 days).
  • Assume that one batch can accommodate DUTs for each fluence.
• 3D Devices: Fresh and irradiated 3D-trenched from FBK (AIDAInnova), and DS 3D-columnar from IMB-CNM (RD50).
  • Trenched 3D at CERN and irradiated in IRRAD: ~50 structures in 16 samples, equally shared among fluences:
    Φ = 1×10¹⁶, Φ = 2.5×10¹⁶, Φ = 5×10¹⁶, Φ = 1×10¹⁷
  • Unclear how many unirradiated samples are at CERN.
  • IFCA will provide the UCSC board to be mounted at CERN.
  • Need to confirm status of irradiated CNM columnar 3D samples at JSI (irradiation point, radioprotection clearance).

Front-End

• UCSC boards + second-stage amplifier (per Vagelis’ suggestion: link). To buy the amplifiers.
  Note: second stage reduces SNR by approximately ½ according to specifications.

Sample Packaging

• At CERN: mounting 3D-trenched devices on UCSC boards.
• At JSI: irradiated TI-LGADs on Chubut2.
• At JSI: non-irradiated TI-LGADs on Chubut2.

Cold Box Equipment

• Five XY piezo stages for DUT and one additional XY piezo stage for reference sensor.
• Single DUT per frame.
• Suppor frames availability for Chubut2 and UCSC (to locate or/and manufacture)
• Cooling box: request transfer to the H6 area.
• Missing AIDA chiller and water cooler (contact: Andre).
• Need to remove/relocate horizontal aluminum profile of the telescope supporting frame (used as cable tray) to prevent collisions with the cooling box.
• Motorized heavy-duty stages (missing end-of-limit switches):
  • Resetting position could move cooling box too far, risking cable and tube breakage.
  • Movement remains under expert control (Andre or Vagelis).
  • Recommendation: disconnect the large stage after alignment for safety.

Reference Plane

• Design proposed by Vagelis: HPK LGAD + UCSC board + second-stage amplifier feeding two digitizers (via RF splitter).

Power Supplies

• Need to clarify availability of HV power supplies.

DAQ

• TI-LGAD:
  • Same DAQ as April 2025 test beam.
• 3D Pixels:
  • Proposal: use a Tektronics MS064-6B from the CERN Electronics Pool.
  • Suggested arrangement (Vagelis): link.
  • Note: no EUDAQ producer available for high-bandwidth oscilloscopes.
  • Dedicated meeting required.