TY  - JOUR
AU  - Huber, Alexander
AU  - Sergienko, Gennady
AU  - Kinna, David
AU  - Huber, Valentina
AU  - Milocco, Alberto
AU  - Mercadier, Laurent
AU  - Balboa, Itziar
AU  - Conroy, Sean
AU  - Cramp, Simon
AU  - Kiptily, Vasili
AU  - Kruezi, Uron
AU  - Lambertz, Horst Toni
AU  - Linsmeier, Christian
AU  - Matthews, Guy
AU  - Popovichev, Sergey
AU  - Mertens, Philippe
AU  - Silburn, Scott
AU  - Zastrow, Klaus-Dieter
TI  - Response of the imaging cameras to hard radiation during JET operation
JO  - Fusion engineering and design
VL  - 123
SN  - 0920-3796
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2017-06360
SP  - 669-673
PY  - 2017
AB  - The analysis of the radiation damage of imaging systems is based on all different types of analogue/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 ∼1.9–3.2 × 1012neutrons/cm2. Such levels of fluence will be reached after ≈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 ∼4 × 109 neutrons/cm2. The impact of hard radiation on the different types of electronics and possible application of cameras during future D-T campaign is discussed.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000418992000139
DO  - DOI:10.1016/j.fusengdes.2017.03.167
UR  - https://juser.fz-juelich.de/record/837447
ER  -