Fast Neutral Pressure Measurements in NSTX

[摘要] Several fast neutral pressure gauges have been installed on NSTX [National Spherical Torus Experiment] to measure the vessel and divertor pressure during inductive and coaxial helicity injected (CHI) plasma operations. Modified, PDX [Poloidal Divertor Experiment]-type Penning gauges have been installed on the upper and lower divertors. Neutral pressure measurements during plasma operations from these and from two shielded fast Micro ion gauges at different toroidal locations on the vessel mid-plane are described. A new unshielded ion gauge, referred to as the In-vessel Neutral Pressure (INP) gauge is under development.

[发布日期] 2002-08-06 [发布机构] Princeton University. Plasma Physics Laboratory.

[关键词] Vacuum;70 Plasma Physics And Fusion Technology;Spherical Torus;Pressure Measurement Diagnostics;Divertors