HGTD-IJS meeting

Friday 16 May 2025, 08:15 → 09:00 Europe/Ljubljana

C/0-C084 - F9 seminarska soba (Jamova)

These are HGTD-IJS group meeting pages

 

https://cern.zoom.us/j/96207798641?pwd=STczWTN5YjFYTmlITFB3bEdPTE1MUT09 

 

 

F9 internal database:
(preprod) https://docs.google.com/spreadsheets/d/1um1xUsOMzj5rGVuCReQqf53B1h4MXAHaCTQQISyXkPY/edit#gid=762628997
(prod) https://docs.google.com/spreadsheets/d/1qijuMoBZnw5EZt8lmTz2q48BkcZ_ctu25dv5TNTIzX0/edit?usp=sharing

HGTD sample inventory:
https://docs.google.com/spreadsheets/d/13VakRG1eQYrnmJMr7BnfdmC9SSElFxrlI6vjo5_Zdck/edit?usp=sharing

Grafana:
https://grafana-hgtd-sensors-qc.app.cern.ch/dashboards

HGTD production database:
https://nginx-hgtddb.app.cern.ch/

 

First batch of production wafers (25x IHEP) is arriving imminently. It is called IHEP1 below

PQC:
- Full PQC test of at least 1 QCTS per wafer (die #31) from IHEP1 before we irradiate it
- Upload results to HGTD database

Database:
- Test Guilherme's scripts for Sr90 upload

IT:
- HV sparking in hybrids:
    - 10 hybrids tested last week by Pau Fuste Martin (4e14, 8e14, 15e14, 7x 25e14)
    - 15 min at 600 V + 30 min at 650 V (8 kOhm, 1.5 mA)
    - One hybrid wit burn marks on needle contacts, not functional
    - One hybrid recovered
    - Visual inspection (Google Drive)
    - Shipping of UN2910 to IFAE/CNM not practical
    - Maybe receive more hybrids for testing
    - Do a long run in climate chamber
- Preproduction IRRAD Samples
    - it seems we requested 4e14, 8e14 and 12e14 **p/cm2**, not neq/cm2
    - tests ongoing, required results:
        - IV: Determine (calculate) equivalent fluences, Graph of PIN current vs calculated equivalent fluence, example of PIN current vs Vbias, current vs Vbias in 1x1 LGAD, table of Vbd in 1x1 LGAD
        - CV: Graph of Vgl vs calculated equivalent fluence, extract the c-parameter
        - TCT: Standard IT tests - graphs of Vgl & Gain vs calculated equivalent fluence, upload to HGTD database
        - Sr90: Charge and time resolution vs Vbias, then two summary graphs of charge + timing at operating voltage vs fluence
        - Check the time reference performance (low signals MPV 200 mV observed last week)
- Production IHEP1:
    - Teach Brigita how to prepare samples for irradiation (pick, pack, label)
    - Check storage space for unirradiated samples (Gel paks) and irradiatied samples (bags)
    - Standard TCT IT: Die #31 is the main, irradiate also #5 & #48
    - TCT should start ASAP
    - Report readiness status at Sensor meeting

Timing:
- Voltage steps 400, 450, 500, 550 V, (600 V)
- Set up multichannel system (caen)

Flex Tails:
- none

HGTD detector performance (my limited take):
- GK to deliver scripts to JD for implementation in Athena

Publications:
- Autorship policy for ATLAS HGTD: projects funded with CERN core money have FIRST AUTHOR + FULL HGTD author list
- HPK HAB version 4 - need to implement comments
- IT QC test paper: paper done in-house, now HGTD approving plots, after that HGTD paper approval
- HGTD testbeam paper will require Sr90 data

3D CNM:
- received second shipments of run 16069 - CVs in progress
- 1-x (square single), 2-x (hex single), 4-x (hex 5x5), 5-x (square 5x5)

 

AIDA TL-LGAD:
- April 2025 analysis pending

 

Thin LGAD (Ex-Flu)
- Received 15, 20 um thick LGADs
- Todo timing unirradiated

 

AC-LGAD:
- IHEP shipment first TCT done with Chubut
- Submit DRD3 abstract for DB-TCT

 

Other:
- Try Edge-TCT on QCTS: polishing, optics to be explored. The goal is to measure E-field/gain, also helpful to NIKHEF/Nijmegen HGTD performance simulation (QT Petja)

 

 

Summer student projects:
- SiC TCT with RD50 CNM - Ajda Osterman
- DC AC TCT for defect studies (start Top-TCT IR with W317, next irradiated, next E-TCT). Try also red light - Marko
- weighting field simulation in HGTD pixel corner
- 3d measurements with TCT+Sr90 (use LGAD for time reference)
- 3d in photovoltaic mode
- MP exploring open source TCAD software 

08:15 → 08:25 QC/QA

Speakers: Bojan Hiti, Gregor Kramberger (Jozef Stefan Institute), Iskra Velkovska, Jernej Debevc (Jozef Stefan Institute (SI)), Matic Terglav (IJS)

08:25 → 08:35 Irradiation test

Speakers: Bojan Hiti, Gregor Kramberger (Jozef Stefan Institute), Jernej Debevc (Jozef Stefan Institute (SI))

08:35 → 08:45 Flex tails

Speakers: Bojan Hiti, Gregor Kramberger (Jozef Stefan Institute), Jernej Debevc (Jozef Stefan Institute (SI))

08:45 → 08:50 AoB