ITER in-vessel viewing system prototype campaign

ITER will need frequent inspections of the first wall blankets and divertor surfaces in order to check for damages and plan maintenance interventions. In order to fulfill this requirement JET has studied an in-vessel viewing system (IVVS), which is based on rotating line scanning technology using linear arrays of optical fibres to send images from a distance to CCD sensors. Essential parts of the IVVS have been further developed by a Finnish consortium and this work has now reached the prototyping stage. A full scale opto-mechanical prototype of the view probe and its scan mechanism equipped with an end to end imaging system has been constructed and tested. (authors)