Response of the imaging cameras to hard radiation during JET operation
| Autor: | Vasili Kiptily, Sergey Popovichev, G. F. Matthews, V. Huber, Alberto Milocco, S. A. Silburn, Sean Conroy, D. Kinna, A. Huber, H. T. Lambertz, I. Balboa, K.-D. Zastrow, Gennady Sergienko, U. Kruezi, Philippe Mertens, Laurent Mercadier, S. Cramp, Christian Linsmeier |
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| Přispěvatelé: | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla. RNM138: Física Nuclear Aplicada |
| Rok vydání: | 2017 |
| Předmět: |
Physics::Instrumentation and Detectors
Astrophysics::High Energy Astrophysical Phenomena Hard radiation Accelerator Physics and Instrumentation Camera cooling 01 natural sciences 010305 fluids & plasmas Radiation damage Optics 0103 physical sciences General Materials Science Image sensor Civil and Structural Engineering 010302 applied physics Physics Jet (fluid) business.industry Mechanical Engineering Acceleratorfysik och instrumentering Nuclear Energy and Engineering Hot pixels Image Camera ddc:620 business CCd |
| Zdroj: | Fusion engineering and design 123, 669-673 (2017). doi:10.1016/j.fusengdes.2017.03.167 idUS: Depósito de Investigación de la Universidad de Sevilla Universidad de Sevilla (US) idUS. Depósito de Investigación de la Universidad de Sevilla instname Fusion Engineering and Design |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2017.03.167 |
| Popis: | The analysis of the radiation damage of imaging systems is based on all different types-of aiialoiue/digital cameras with uncooled as well as actively cooled image sensors in the VIS/NIR/MWIR spectral ranges. The Monte Carlo N-Particle (MCNP) code has been used to determine the neutron fluence at different camera locations in JET. An explicit link between the sensor damage and the neutron fluence has been observed. Sensors show an increased dark-current and increased numbers of hot-pixels. Uncooled cameras must be replaced once per year after exposure to a neutron fluence of similar to 1.9-3.2 x 10(12)neutrons/cm(2). Such levels of fluence will be reached after approximate to 14-22 ELMy H-mode pulses during the future D-T campaign. Furthermore, dynamical noise seen as a random pattern of bright pixels was observed in the presence of hard radiation (neutrons and gammas). Failure of the digital electronics inside the cameras as well as of industrial controllers is observed beyond a neutron fluence of about similar to 4 x 10(9) neutrons/cm(2). The impact of hard radiation on the different types of electronics and possible application of cameras during future D-T campaign is discussed. EURATOM 633053 |
| Databáze: | OpenAIRE |
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