HGTD-IJS meeting

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

C/0-C084 - F9 seminarska soba

Jamova

10
Description

These are HGTD-IJS group meeting pages

 

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

 

 

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- IHEP Delivery 1.2 (50 wafers): 66 kW, IT done, all passed
- IHEP Delivery 2 (95 wafers): 63 kW, IT done, B36-W7 & B36-W11 fail TCT gain --> check Sr90
- IHEP Delivery 3 (112 wafers): 63 kW, cooling down
- IHEP Delivery 4 & 5 (36 + 44? wafers): TBC
 
Annealing:
- 160 kmin at 40°C done for CV samples
- 80 kmin at 40°C done for TCT samples
- Plan: systematic 40°C study with Batch 2 samples

PQC:

SQC: 
- Temperature study by Bor:
    - QCTS with Pt100 -30 - +20 °C
    - Eg = 1.19 +- 0.1 eV
    - Extrapolate Pt100 values to T below -22 °C (out of range)
    - apply correction for current slope (p+ generated, not multiplied)
- Try to repeat test on main sensor    

IT:
- Delivery 2 all 95 tested
- B36-W7 & B36-W11 fail TCT gain Pos5 & Pos30 --> todo check with Sr90

Database:
- regularly upload

Timing:
- Voltage steps 400, 450, 500, 550 V, (600 V)
- T history study (USTC W7-50 preprod 107 V)
    - Test Q right after cooling down vs. after long thermalization --> no effect
    - Test Q after long thermalization and different biasing time --> no effect
    - Test SC board stability with a pulsar --> TODO

Flex Tails:
- asked Elgoline for quotes

Irradiations:
- Birmingham 22 MeV: done cp = 2.9e-16
- Krakow 60 MeV: done cp = 2.3e-16
- Cyric 70 MeV: to return in Aug
- UNM/FNAL 400 MeV:  awaiting return
- IRRAD 24 GeV: cp = 2.9e-16

Hybrid tests:
- Module flex connector TID radiation hardness investigated in HGTD
- Asked Elgoline for quote for 20 hybrid boards
- Irradiations of B1.2 to 4e14, 8e14, 15e14, 25e14, 30e14 (2/fluence) - samples annealing done
- Tuning & Sparking:
    - Wire bonded and tested (CO2(s)) three hybrids from 2025 sparking tests:
        - S35 (first column dig. failure from the start), S12, S13 (both ok)
        - S12 developed two noisy pixel on the edge between cold tests 1 & 2 (probably setup/humidity intake related)
        - All can be biased to 600 V without noise increase
        - Minimal threshold 3.9 fC (below edges become noisy)
        - TODO 3e15 hybrid newly bonded
    - Jitter measured with laser, sigma 19 ps
    - Jitter measured with pulsing on WB hybrids, sigma 17 ps at minimal thr
    - Shot noise study - ready to start publication
- Sr90
    - First tests with unirradiated hybrid done
    - Trigger area larger (5x5 pixels) than geometric shadow (2x2 LGAD with 1ch bonded, rest floating) --> scattering?
    - time resolution at -30°C, 100 V: 80 ps/50 ps before/after timewalk correction
- Measurement plan:
    - Hybrid I-V
    - Sparking test 30e14
    - Sr90 efficiency measurement (coincidence REF trigger)
    - study also edge pixels
    - Implement PCB modification to reduce ToA diff nonlinearity

Testbeam:
- AIDAInnova TI-LGAD mar26 analysis ongoing --> see contribution 17 July
 https://docs.google.com/spreadsheets/d/1gXOXmDh_rMZvVni9Ns_o9tcRdI506K8smWYKMCjrMm8/edit?gid=0#gid=0
- IME3D mar26 analysis ongoing

Publications:
- HPK HAB version 4 - need to implement comments
- Mixed
- 3D - working on response
- HGTD hybrid jitter

3D CNM:
- 1-x (square single), 2-x (hex single), 4-x (hex 5x5), 5-x (square 5x5)

Thin LGAD (Ex-Flu)
- Received 15, 20 um thick LGADs
- Todo timing unirradiated,
 
CNM overdoped LGAD:
- Back to step 1
 
CiS LGAD:
- Production ongoing
 
Summer student projects:
- DC AC TCT for defect studies (start Top-TCT IR with W317, next irradiated, next E-TCT). Try also red light
- weighting field simulation in HGTD pixel corner
- 3d in photovoltaic mode
- MP exploring open source TCAD software

 

 

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