ITER diagnostic system: Vacuum interface

摘要: Abstract Diagnostics play an essential role for the successful operation of ITER tokamak. They provide means to observe control and measure plasma during The components diagnostic system in tokamak will be installed vacuum vessel, cryostat, upper, equatorial divertor ports, cassettes racks, as well various buildings. Diagnostic that are placed a high radiation environment expected operate life ITER. There approx. 45 systems located on Some diagnostics incorporate direct or independently pumped extensions maintain their necessary conditions. require base pressure less than 10 −7  Pa, irrespective operation, leak rate −10  Pa m 3  s −1 . In all cases it is closed fuel cycle. These directly coupled integral part containment therefore subject same design requirements tritium active gas confinement, normal accidental All diagnostics, whether not pumped, penetration boundary (i.e. window assembly, feedthrough etc.) demountable joints. Monitored guard volumes provided elements judged vulnerable by virtue construction, material, load specification etc. Standard arrangements made construction monitoring, evacuating testing these volumes. incorporated at more 20 ports This paper describe typical particular monitored volume. status systems, which start detailed design, outlined specific features described.