Overview of high priority ITER diagnostic systems status

Walsh, M.*; Andrew, P.*; Barnsley, R.*; Bertalot, L.*; Boivin, R.*; Bora, D.*; Bouhamou, R.*; Ciattaglia, S.*; Costley, A. E.*; Counsell, G.*; Direz, M. F.*; Drevon, J. M.*; Encheva, A.*; Fang, T.*; Janeschitz, G.*; Johnson, D.*; Kim, J.*; Kusama, Yoshinori; Lee, H. G.*; Le Guern, F.*; Levesy, B.*; Martin, A.*; Maquet, P.*; Okayama, Katsumi*; Reichle, R.*; Patel, K.*; Pitcher, C. S.*; Prakash, A.*; Simrock, S.*; Taylor, N.*; Thomas, D.*; Udintsev, V. S.*; Utin, Y.*; Vasu, P.*; Vayakis, G.*; Veshchev, E.*; Walker, C.*; Zvonkov, A.*

The ITER device is currently under construction. To fulfil its mission, it will need a set of measurement systems. These systems will have to be robust and satisfy many requirements hitherto unexplored in Tokamaks. Typically, diagnostics occupy either a removable item called a port plug, or installed inside the machine as an intricate part of the overall construction. Limited space availability has meant that many systems have to be grouped together. Installation of the diagnostic systems has to be closely planned with the overall schedule. This paper will describe some of the challenges and systems that are currently being progressed.