2nd General VTX workshop

Name: 2nd General VTX workshop
Start: 2026-04-20T13:00:00+02:00
End: 2026-04-22T13:00:00+02:00
Location: DESY

20 Apr 2026, 13:00 → 22 Apr 2026, 13:00 Europe/Berlin

Building 1B, Seminar room 4a/b (DESY)

Building 1B, Seminar room 4a/b

DESY

Notkestraße 85 D-22607 Hamburg

Ami Rostomyan (BELLE (BELLE II Experiment)), Jerome Baudot (IPHC-Strasbourg)

Description

This 2nd general VTX workshop will mostly focus on mechanical lintegration aspects. But all other VTX activities should also be discussed to some extent.

The workshop will be held in:

Monday & Tuesday: building 1B, 2nd floor, Seminar room 4A/b,
Wednesday: building 5, auditorium

Remote participation is possible, use https://speakapp.link/to/I1Wn8A.
Eduroam and DESY-guest networks are available.

Starting and ending times should allow participants to travel on Monday morning and Wednesday afternoon.

Timetable is in preparation and current status is PRELIMINARY.

Fees will cover:

coffee breaks and social dinner: 60 EUR
coffee breaks only: 30 EUR

Social dinner on Monday 20^th April at 7 PM at Hoppe's Restaurant on the Elbe bank: Övelgönne 6, 22605 Hamburg. Fish, meat and veggie options will be available. The dinner includes a main dish and one soft drink/beer.

Registration are now closed, contact us in case of issue.

Participants

35 View full list

Monday 20 April
- 13:30 → 14:00
  
  Registration 30m Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
- 14:00 → 15:30
  Introduction Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
  
  Convener: Jerome Baudot (IPHC-Strasbourg)
  - 14:00
    
    Welcome to DESY 10m
    
    Speaker: Ami Rostomyan (DESY)
  - 14:15
    
    Status of VTX and workshop goals 20m
    
    Speaker: Jerome Baudot (IPHC-Strasbourg)
    
    intro-DesyWorkshop-202604120.pdf
  - 14:40
    
    WG2 sensor design report 20m
    
    Speaker: Thanh Hung Pham (BELLE (BELLE II Experiment))
    
    vtx_workshop_avril_2026_pixeldesign.pdf
    
    vtx_workshop_avril_2026_pixeldesign.pptx
  - 15:05
    
    WG3 sensor testing report 20m
    
    Speaker: Christian Bespin (Universität Bonn)
    
    WG3 Status Report
- 15:30 → 16:00
  
  Coffee break 30m Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
- 16:00 → 18:00
  oVTX Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
  - 16:00
    
    oVTX Design Status 40m
    
    (30' talk + 10' discussion)
    Items:
    - oVTX layout: L4,5,6 ladder design, fixing to the cones with sliding mechanism;
    - Mechanical characterisation of the new L6 prototypes. How to cope with starting deformation: thermal cycles by INFN-Pi and cold-glueing by the company;
    - thermal-fluid-dynamic bench with not-uniform heathers for 1-pipe cold plate and thermal simulations;
    - oVTX cooling needs (Alice experience on the cooling plant: no water-leak sensor!).
    
    Speaker: Maurizio Massa (BELLE (BELLE II Experiment))
    
    2026_04_21 2nd VTX Workshop DESY.pptx
  - 16:40
    
    Status of the Design of the 4-chip Cu Dummy flex 30m
    
    (20' talk + 10' discussion)
    Items covered:
    -Design/order status, estimated delivery time
    -Implementation of temperature sensors' reading
    -Plan for the test in Vienna: chip emulation by FPGA
    
    Speaker: Massimo Minuti (BELLE (BELLE II Experiment))
    
    Dummy_Flex_Design_20262004.pdf
  - 17:10
    
    oVTX Module/Ladder assembly 40m
    
    (20' Talk + 20' discussion)
    Items covered:
    - Specifications & QA;
    - modules (i.e. electrical unit) assembly;
    - ladders (mechanical unit) assembly;
    - Tools (chuck/jigs), prototype's parts procurements and assembly procedures development;
    - Construction sites / schedule.
    
    Speaker: Stefano Bettarini (BELLE (BELLE II Experiment))
    
    jb-ideas-module-assembly-20260420.pdf
    
    oVTX_20260420_vs5.pdf
- 19:00 → 21:30
  
  Social dinner 2h 30m Hoppe's Restaurant
  
  Hoppe's Restaurant
  
  Övelgönne 6, 22605 Hamburg https://maps.app.goo.gl/k9JGoyEcDycLUMAL6
Tuesday 21 April
- 08:30 → 10:30
  WG4 - iVTX Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
  - 08:30
    
    Plans towards iVTX ladder prototypes with TPG 15m
    
    (10' talk + 5' discussion)
    Items:
    - Parts (TPG, Si, parylene, ...) procurement;
    - Prototype assembly procedures;
    - Thermal test plans and expectations from simulations.
    
    Speaker: Julien Bonis (BELLE (BELLE II Experiment))
    
    Towards_iVTX_TPG_prototype.pdf
  - 08:45
    
    Result of dicing samples at the iVTX dimension 5m
    
    Speaker: Mr Mathieu Goffe (DESY (Deutsches Elektronen Synchrotron))
    
    2026_04_21 100 um dummy samples for iVTX.pdf
  - 08:50
    
    iVTX developments at QMUL 40m
    
    (20' talk + 5' discussion)
    Progress on the sliding mechanism and overall iVTX mechanical support
    Conductivity measurement
    Fallabck cooling option
    
    Speakers: Adrian Bevan (BELLE (BELLE II Experiment)), Dr Ali Awais (BELLE (BELLE II Experiment)), Dhyey Ketan Joshi (QMU London), Dominic Howgill (BELLE (BELLE II Experiment))
    
    2026_04_21 QMUL iVTX Discussion.pdf
- 10:30 → 11:00
  
  Coffee break 30m Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
- 11:00 → 12:00
  WG4 - iVTX Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
  - 11:00
    
    Thermal conductivity of irradiated TPG 25m
    
    (20' talk + 5' discussion)
    
    Speaker: Franz matejcek (U. Frankfurt)
    
    26-04-21_TPG_Irradiation_FMatejcek.pdf
  - 11:25
    
    RDL: electrical measurements on IZM structures and prototype 25m
    
    (20' talk + 5' discussion)
    Items:
    - eye diagrams of the IZM test structures;
    - from IZM: proposal to manufacture the ladders;
    - iVTX flex circuit (from ladder to the lpGBT/VTRx+ board).
    
    Speaker: Mr Andreas Ulm (BELLE (BELLE II Experiment))
    
    ulm_rdl.pdf
- 12:00 → 13:00
  
  Lunch 1h Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
- 13:00 → 14:35
  I.R. Integration Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
  - 13:00
    
    LS2 IR mechanics activity status and plan 40m
    
    (30' talk + 10' discussion)
    
    Speaker: Shuji Tanaka (BELLE (BELLE II Experiment))
    
    LS2IRintegration20260421.pdf
  - 13:40
    
    oVTX services and rings' shape 10m
    
    (5' talk + 5' discussion)
    
    Speaker: Margherita Rovini (BELLE (BELLE II Experiment))
    
    VTX Workshop_oVTX_Manifolds_and_cabling_summary_21_04_26.pdf
  - 13:50
    
    oVTX Ladder mount concept "a la SVD" (compliant with the sliding mechanism) 10m
    
    (5' Talk + 5' discussion)
    
    Speaker: Maurizio Massa (BELLE (BELLE II Experiment))
  - 14:00
    
    Discussion also with STL 35m
- 14:35 → 16:15
  WG4 - Discussion with PXD + Potential visit Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
  - 14:35
    
    Discussion 1h 40m
    
    Speakers: Carsten Niebuhr (DESY), Fabian Becherer (BELLE (BELLE II Experiment)), Karsten Gadow (BELLE (BELLE Gruppe)), Maiko Takahashi (BELLE (BELLE II Experiment))
    
    240129 TB.pdf
    
    HardwareActivities_PreviousPoFPeriod_3col.pdf
    
    poster_general_desy_labs_horizontal.pdf
    
    poster_pxd_asics_readout.pdf
    
    PXD2_status_Fabian_Becherer.pdf
    
    PXD_KEK_installation_simplified_v2.pdf
    
    PXD_mechanics_simplified_v2.pdf
    
    PXD_precommisioning_v2.pdf
- 16:15 → 16:45
  
  Coffee break 30m Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
- 16:45 → 18:25
  WG1 - Performance Building 1B, Seminar room 4a/b
  
  Building 1B, Seminar room 4a/b
  
  DESY
  
  Notkestraße 85 D-22607 Hamburg
  - 16:45
    
    Status and plan for VTX simulations & performance 20m
    
    Speaker: Vidya Sagar Vobbilisetti (CPPM France)
    
    2026-04-21.pdf
  - 17:05
    
    Status of Upgrade performance studies 20m
    
    Speaker: Alessandro Gaz (University of Padova & INFN)
    
    VTX_workshop_ale_0421.pdf
  - 17:25
    
    Discussion on on-going or next tasks 30m
  - 17:55
    
    Discussion with STL 30m
Wednesday 22 April
- 08:00 → 09:50
  WG5 - system / WG6 - telescope Building 1b,Seminar room 3
  
  Building 1b,Seminar room 3
  
  DESY
  - 08:00
    
    WG5 general 10m
    
    Speaker: Christian Irmler (MBI Vienna)
    
    20260422_WG5_intro_irmler.pdf
  - 08:10
    
    Results of lpGBT and VTRx+ irradiation campaign 25m
    
    Speaker: Markus Friedl (MBI Vienna)
    
    2026.04.22_friedl_lpgbt.pdf
  - 08:35
    
    Update lpGBT testing for iVTX at CPPM 20m
    
    Speaker: Patrick Breugnon (BELLE (BELLE II Experiment))
    
    2026-04-22 - Status of lpGBT activities at CPPM.pdf
  - 08:55
    
    Report from Chinese Groups WG5 20m
    
    Speaker: Jingzhou Zhao (BELLE (BELLE II Experiment))
    
    VTXWG5-China groups.pdf
  - 09:15
    
    Requirements on the Interface between VTX back-end and Belle II Trigger 15m
    
    Speaker: Taichiro Koga (BELLE (BELLE II Experiment))
    
    koga_vtxtrg_2026_4_22.pdf
  - 09:30
    
    WG6 - plan for OBELIX telescope 20m
    
    Speaker: Carlos Marinas (IFIC (CSIC-UV))
    
    WG6Marinas.pdf
- 09:50 → 10:20
  
  Coffee break 30m Building 5
  
  Building 5
  
  DESY
- 10:20 → 11:20
  TDR preparation Building 1b, Seminar room 3
  
  Building 1b, Seminar room 3
  
  DESY
  - 10:20
    
    TDR discussion 1h
    
    Speaker: Jerome Baudot (IPHC-Strasbourg)
    
    tdr-discussion-20260422.pptx
- 11:20 → 12:00
  OPEN Steering group meeting Building 1b, Seminar room 3
  
  Building 1b, Seminar room 3
  
  DESY
  - 11:20
    Points to be discussed & discussion 40m
    
    new chat
    
    database for VTX parts
    
    documentation
    
    groups in Gitlab
    
    next workshop
    
    Requests to institutes for
    - Upgrade Group
    - Project-level information?needed for TDR
    
    Speaker: Jerome Baudot (IPHC-Strasbourg)
    
    tdr-discussion-20251215.pdf
- 12:00 → 12:30
  
  Closing Building 1b, Seminar room 3
  
  Building 1b, Seminar room 3
  
  DESY
  
  Convener: Jerome Baudot (IPHC-Strasbourg)
  
  closure-vtx-20260422.pdf

2nd General VTX workshop

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Hoppe's Restaurant

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1B, Seminar room 4a/b

DESY

Building 1b,Seminar room 3

DESY

Building 5

DESY

Building 1b, Seminar room 3

DESY

Building 1b, Seminar room 3

DESY

Building 1b, Seminar room 3

DESY