A new CERN report documenting the knowledge and experiences gained by the LHC experiments in running detector systems in radiation environments during 2010–2018.has been published by CERN, edited and authored by Dr. Ian Dawson (QMUL). The report covers topics such as: Are the detector systems operating and performing as expected? How reliable are the radiation damage models and predictions? How accurate are the Monte Carlo simulation codes? Have there been unexpected effects? What mitigation strategies have been developed? Further details can be found at: https://doi.org/10.23731/CYRM-2021-001
This year Dr Dawson helped organise and convene sessions at the IEEE NSS-MIC conference, a leading international annual meeting for scientists, engineers, researchers, medical physicists and students with an interest in radiation detectors, related technologies and their applications.
A new paper co-authored by the Sheffield team has been accepted for publication in the Journal “Non Destructive Testing and Evaluation”. In this paper we show the important role simulation plays in dosimetry, as well providing an effective method for studying self shielding effects. For further details click here.
New paper published in JINST on “In situ radiation damage studies of opto-electronics in the ATLAS semiconductor tracker”. Co-authored by the Sheffield team. To access the paper click here.
A new paper co-authored by Dr I. Dawson and P. S. Miyagawa has been published in the Journal of Instrumentation (JINST). The pixel detector system is closest to the interaction point where the radiation backgrounds are most intense. For further details click here.
Our Geant4 simulation work into the effects of radiation of ultrasonic transducers, was presented at the ENSAR2 Workshop on Geant4 in Nuclear Physics, held at Ciemat, Madrid. The full poster can be found at: https://indico.cern.ch/event/746466/contributions/3345606/
Last week the Innovate UK ReDRESS team has successfully irradiated three different ultrasound transducer technologies with gammas and neutrons at the Jozef Stefan Institute TRIGA nuclear research reactor. The goal is to demonstrate the levels of radiation resilience for non destructive testing in the nuclear industry. Detailed simulations are also being performed by the University of Sheffield to establish the neutron and gamma fluences inside the devices under test, as well as quantities such as total ionising dose, neutron kerma, and DPA. The results will be published.
A third in a series of workshops at CERN will take place 11-12 February, looking at the impact of radiation on sensor and electronic systems at the Large Hadron Collider. Dr Dawson is leading the organisation of the workshop – unique in bringing together the experiences from across the experiments (ATLAS, CMS, LHCb and ALICE). All these experiments are now observing significant radiation damage in their detector systems, so it is timely to compare the original performance predictions with today’s measurements. The high levels of radiation are caused by the intense rates of proton-proton collision (billions every second). Four sessions at the workshop will look into 1) silicon sensor measurements, 2) sensor simulation, 3) radiation environment simulation and monitoring, 4) impact of radiation on electronic and optoelectronics. As a result of the workshops Dr Dawson will lead on producing a so called “CERN Yellow Report”, which will become the go to reference for designing and operating state-of-the-art detector systems in future projects.
A UK consortium of tech companies with the University of Sheffield as the academic partner, successfully irradiated three different ultrasound transducer technologies with gamma at the Dalton Cumbrian Facility, University of Manchester, UK in December. The goal is to demonstrate the radiation resilience of ultrasound transducers up to ionising dose rates of 10 MGy. Detailed simulations have been performed by the Sheffield Radiation Effects team to establish the gamma fluence and dose profiles inside the devices under test. The results will either be presented at a conference, or be published in a peer reviewed journal.