Radiation effects at the LHC experiments and impact on operation and performance

23 Apr 2018, 08:30 → 24 Apr 2018, 20:15 Europe/Zurich

6/2-024 - BE Auditorium Meyrin (CERN)

With focus on radiation effects in inner detector systems, the goal of this 2 day workshop at CERN is to bring together experiences of the different LHC experiments. A substantial integrated luminosity has now been delivered and radiation effects are becoming increasingly apparent, so such discussions are timely. How well are we modelling and monitoring radiation damage? Have there been unforeseen effects, if so how was the impact mitigated? What lessons can be learned for the LHC upgrades and future vertex and tracking detector systems?

The workshop is divided into sessions on: sensor measurements & TCAD simulations, radiation background simulation and monitoring; impact of radiation on electronics/optoelectronics. See below for more detail. Please note that the electronics session has been timed to precede the ACES electronics workshop for LHC upgrades to allow easy participation between the communities: https://indico.cern.ch/event/681247/

Participation to the workshop is open to all.
Oral presentations are by invitation only.
There are no registration fees, but please register (if you'd like free coffee!)​​​​​​​

Session 1: Sensor Measurements (Mon 9.00-12.30)

Overview of radiation induced changes of sensor properties and the resulting degradation of LHC tracking performance. This will include measurements of sensor-, cluster-, and track-level observables that are sensitive to radiation damage effects including the leakage current, "depletion voltage", Lorentz angle, hit efficiency, charge collection efficiency, tracking efficiency, tracking resolution, etc. Discussion will include techniques and models used to scale sensor damage parameters over temperature, fluence and time. Outlook to expected future performance degradation and discussion on lessons learned from present detector operation towards the future (2018 and Run 3+) in relation to damage modelling, prediction, measurements and potentially mitigation.

Session 2: Electronics/Optoelectronics (Mon 14.00-17.30)

Overview of both ionizing and non-ionizing radiation effects on tracking detector electronics.  Low and high dose-effects will be discussed.  This session will include measurements and operational experience with single event upsets, calibration drift, and tuning.  The session will also include strategies for mitigating radiation-induced effects such as lowering thresholds and re-calibrating / power-cycling.  Future outlook toward the readout in 2018 and Run 3+ will be discussed.

Session 3: Radiation Background Simulation and Monitoring (Tue 9.00-12.30)

Overview of the radiation background simulations performed at the LHC experiments. Discussions on: pp collision event generation; particle transport FLUKA/G4; predicting radiation damage NIEL/TID/SEU; comparisons between the simulated predictions and the LHC Run1/Run2 detector and monitoring measurements; understanding simulation uncertainties (and safety factors) for predictions at the HL-LHC and beyond.

Session 4: Sensor Simulation (Tue 14.00-17.30)

Review strategies and algorithms deployed by the LHC experimental collaborations to simulate fluence-dependent effects in silicon tracking detectors.  Discussion will include model integration into collaboration Monte Carlo productions, benchmark studies, validation and tuning strategies, comparisons to data, challenges (e.g. annealing), and outlook for Run 3 and the HL-LHC (time permitting).

RadDamageWorkshopPoster.pdf

Monday, 23 April

1 Registration

2 Workshop welcome & goals

Speaker: Ian Dawson (University of Sheffield (GB))

RadDamageWorkshopIntro.pdf

Sensor Measurements

Scope: Overview of radiation induced changes of sensor properties and the resulting degradation of LHC tracking performance. This will include measurements of sensor-, cluster-, and track-level observables that are sensitive to radiation damage effects including the leakage current, "depletion voltage", Lorentz angle, hit efficiency, charge collection efficiency, tracking efficiency, tracking resolution, etc. Discussion will include techniques and models used to scale sensor damage parameters over temperature, fluence and time. Outlook to expected future performance degradation and discussion on lessons learned from present detector operation towards the future (2018 and Run 3+) in relation to damage modelling, prediction, measurements and potentially mitigation.

3 Session introduction

Speaker: Michael Moll (CERN)

4 Pixel Leakage Current Measurements from ATLAS (20'+5')

Speaker: Aidan Grummer (University of New Mexico (US))

Grummer_RadiationEffects.pdf

5 Leakage Current Measurements from LHCb (20'+5')

Speaker: Vinicius Franco Lima (University of Liverpool (GB))

lhcb_IV_radiationeffectsCERN_5.pdf

6 CMS Pixel and Strip radiation damage measurements (20'+10')

Speakers: Julia Alexandra Hunt (KIT - Karlsruhe Institute of Technology (DE)), Julia Alexandra Hunt (KIT - Karlsruhe Institute of Technology (DE))

2018_04_23_Julia_Hunt_Pixel_and_Strip_rad_dam.pdf

10:35 Coffee Break

7 Pixel Depletion Voltage Measurements from ATLAS (15'+5')

Speaker: Julien-Christopher Beyer (Max-Planck-Institut fur Physik (DE))

beyer_depl_volt_ATLAS.pdf

8 Depletion Voltage Measurements from LHCb (20'+5')

Speaker: William James Barter (University of Manchester (GB))

DepletionVoltageMeasurements.pdf

9 Measurements with the ATLAS strip detector (20'+5')

Speaker: Taka Kondo (High Energy Accelerator Res. Organ. (KEK))

RadDamageWksp_20180423_Taka.pdf

10 Latest News from RD50 (15'+5')

Speaker: Matteo Centis Vignali (CERN)

presRadEffectLHCcentis.pdf

12:30 Lunch Break

Electronics/Optoelectronics

Scope: Overview of both ionizing and non-ionizing radiation effects on tracking detector electronics.  Low and high dose-effects will be discussed.  This session will include measurements and operational experience with single event upsets, calibration drift, and tuning.  The session will also include strategies for mitigating radiation-induced effects such as lowering thresholds and re-calibrating / power-cycling.  Future outlook toward the readout in 2018 and Run 3+ will be discussed.

electr_irrad_summary_v2.docx

electr_irrad_summary_v2.pdf

11 Introduction

Speakers: Alexandre Rozanov (CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR)), Erik Butz (KIT - Karlsruhe Institute of Technology (DE)), Ian Dawson (University of Sheffield (GB))

rozanov_introduction_electronics.pdf

rozanov_introduction_electronics.pptx

12 TID effects at 130nm pixel electronics at low dose in ATLAS

15 min talk + 5 min discussion

Speaker: Malte Backhaus (ETH Zurich (CH))

20180423 - IBL LV current.pdf

13 SEU effects in the ATLAS pixel electronics

15 min talk + 5 min discussion

Speaker: Pierfrancesco Butti (CERN)

SEU_RadWorkshop.pdf

14 Irradiation effects in the ATLAS optoelectronics

15 min talk + 5 min discussion

Speaker: Anthony Weidberg (University of Oxford (GB))

In-Situ Radiation Damage Studies for SCT Optical Links 200418.pdf

In-Situ Radiation Damage Studies for SCT Optical Links 200418.ppt

15 SEU in the ATLAS strip detector (SCT)

15 min talk + 5 min discussion

Speaker: Dave Robinson (University of Cambridge (GB))

RadWorkshop23042018_DR.pdf

16 Irradiation aging of the electronics of the ATLAS Transition Radiation Tracker (TRT)

15 min talk + 5 min discussion

Speaker: Bijan Haney (University of Pennsylvania (US))

TRT_Radiation_Workshop_April23.pdf

15:50 Coffee break

17 Strip electronics and optoelectronics irradiation effects at CMS

15 min talk + 5 min discussion

Speaker: Jan Troska (CERN)

CMSTk_olink_radeffects_workshop_23apr2018.pdf

18 SEU in CMS pixels

15 min talk + 5 min discussion

Speaker: Wolfram Erdmann (Paul Scherrer Institut (CH))

2018-04-23-cms-pixel-seu.pdf

19 Irradiation effects in ALICE electronics

15 min talk + 5 min discussion

Speaker: Hartmut Hillemanns (CERN)

CERN_LHC_Rad_symp_23042018_HHI.pdf

20 Discussion session

discussion_electronics.pdf

discussion_electronics.pptx

Tuesday, 24 April

Radiation Background Simulation and Monitoring

Scope: Overview of the radiation background simulations performed at the LHC experiments. Discussions on: pp collision event generation; particle transport FLUKA/G4; predicting radiation damage NIEL/TID/SEU; comparisons between the simulated predictions and the LHC Run1/Run2 detector and monitoring measurements; understanding simulation uncertainties (and safety factors) for predictions at the HL-LHC and beyond.

21 Introduction

Speakers: Sophie Mallows (KIT - Karlsruhe Institute of Technology (DE)), Ian Dawson (University of Sheffield (GB)), Agnieszka Mucha (UST, FPACS, CERN)

22 ATLAS simulation overview

20 min talk + 5 min discussion

Speaker: Paul Miyagawa (University of Sheffield (GB))

ATLAS Fluka 24-04-18.pdf

23 CMS simulation overview

20 min talk + 5 min discussion

Speaker: Sophie Mallows (KIT - Karlsruhe Institute of Technology (DE))

CMSsimulationOverview_v2.pdf

CMSsimulationOverview_v2.pptx

24 LHCb simulation overview

20 min talk + 5 min discussion

Speaker: Tomasz Szumlak (AGH University of Science and Technology (PL))

LHCb_Sim_CERN_23042018.pdf

LHCb_Sim_CERN_23042018.pptx

10:25 Coffee break

25 ATLAS radiation background studies using GEANT4 & GRID

15 min talk + 5 min discussion

Speaker: Sven Menke (Max-Planck-Institut fur Physik (DE))

radws24042018.pdf

26 CMS benchmarking of the radiation fields

12 min talk + 3 min discussion

Speaker: Igor Azhgirey (Institute for High Energy Physics (RU))

ai_180424.pdf

ai_180424.pptx

27 LHCb benchmarking of the radiation fields

12 min talk + 3 min discussion

Speaker: Matthias Karacson (CERN)

Benchmarking of the radiation fields MK.pdf

28 Inner detector radiation field measurements with RadMons

12 min talk + 3 min discussion

Speaker: Igor Mandic (Jozef Stefan Institute (SI))

RadEffect_Mandic_talk.pdf

29 Measurement of composition of radiation fields in the ATLAS experiment with MPX/TPX

12 min talk + 3 min discussion

Speaker: Stanislav Pospisil (Institute of Experimental and Applied Physics, Czech Technical University in Prague)

Archive.zip

Timepix for Rad-hardness-Workshop-final.pdf

Timepix for Rad-hardness-Workshop-final.pptx

30 Discussion on simulation uncertainties and safety factors

Speaker: Ian Dawson (University of Sheffield (GB))

RadSimSFs.pdf

12:30 Lunch break

Sensor Simulation

Scope: Review strategies and algorithms deployed by the LHC experimental collaborations to simulate fluence-dependent effects in silicon tracking detectors.  Discussion will include model integration into collaboration Monte Carlo productions, benchmark studies, validation and tuning strategies, comparisons to data, challenges (e.g. annealing), and outlook for Run 3 and the HL-LHC (time permitting).

31 Introduction

Speaker: Marco Bomben (LPNHE & Université Paris Diderot, Paris (FR))

bomben_rad_damage_ws_180423.pdf

32 Silicon Sensor Simulation in the ATLAS Monte Carlo Framework (20'+10')

Speaker: Ben Nachman (University of California Berkeley (US))

ATLAS_SensorSim_Nachman .pdf

33 Silicon Sensor Simulation in the LHCb Monte Carlo Framework (15'+5')

Speaker: Tomasz Szumlak (AGH University of Science and Technology (PL))

LHCb_Sim_SiResponse_24042018.pdf

LHCb_Sim_SiResponse_24042018.pptx

34 Silicon Sensor Simulation in the CMS Monte Carlo Framework (15'+5')

Speakers: Morris Swartz (Johns Hopkins University (US)), Morris Swartz (Johns Hopkins University (JHU))

CERN_Radiation_Damage_Workshop.pdf

15:20 Coffee break

35 Cluster and Track Property Data/MC in ATLAS (20'+5')

Speaker: Lorenzo Rossini (Università degli Studi e INFN Milano (IT))

TalkRadDamATLAS.pdf

36 Discussion and Closeout