11 Introduction of ITER Port plug and Diagnostics Integration 17 April 2015 Damao Yao

22 ITER Diagnostics  Although its scale and expected performance is close to that required for a commercial reactor, ITER must be considered as an experiment and as such has uncertainties in many aspects of its plasma physics performance.  Consequently, a major goal of the ITER Project is to improve the understanding of reactor-grade tokamak plasmas and their effect on the machine hardware  To accomplish this mission, the Project from the start has devoted significant effort in designing and facilitating diagnostic access and compatibility with the fusion plasma.  In total, approximately 50 different diagnostic systems are in preparation to accomplish this.  These are meant to not only understand the performance of the ITER plasma, but to also optimize and to control it.

33 Port Plug Locations

44 upper port plugs equatorial port plugs Port Plug Locations

55 Divertor, Equatorial & Upper Port Diagnostics Diagnostics are everywhere!

66 Equatorial Port Plug Diagnostics approximately 30 systems in 6 port plugs

77 Upper Port Plug Diagnostics approximately 18 systems in 12 port plugs

88 Equatorial Port Plugs 2007

99 Equatorial Port Diagnostic Apertures 2007

10 Equatorial Port Plugs Structure Radial Drawers All diagnostics interface with all others Lids have structural problem Doesn’t mitigate disruptions BSM focuses load towards front of EPP structure Assembly complicated in a RH environment EPP 2006 in ITER_D_23G32M

11 Equatorial Port Plugs Structure

12 Upper Port Plugs

13 Upper Port Diagnostic Apertures BOLOMETRY RAYCXRS DIV_IMP_MONITOR H_ALPHA_SPECTRONEUTRON_ACT VERT_NEUT VISIBLE_IR_TV

14 DFW is separable from the DSM DFW and its fastening to drawer addressed by DFW effort

15 DFW is separable from the DSM DFW and its fastening to drawer addressed by DFW effort

16 Port Plug for Antenna ICRH EQ-ECH UP-ECH

17 Relevant Information  ITER IDM connection  DFW and DSM design review presentations (PDR-LWDUCP, FDR-LWEMA4 )  DDD for CDR, PDR and FDR  Port plug and diagnostics integration from different DA  ITER IDM documents (55. Diagnostics/…)

18 Summary  Reactor-grade tokamak plasma physics performance study is necessary  Diagnostics integrated in port plug is convenient for maintenance  Radiation shielding should be considered for device and diagnostic components protection  Labyrinth structure is required for improve nuclear shielding  Nuclear heating will deposit on diagnostic components