Title :
Operational upgrades to the DIII-D 60 GHz electron cyclotron resonant heating system
Author :
Harris, T.E. ; Cary, W.P.
Author_Institution :
Gen. Atomics, San Diego, CA, USA
Abstract :
One of the primary components of the DIII-D radiofrequency (RF) program over the past seven years has been the 60 GHz electron cyclotron resonant heating (ECRH) system. The system now consists of eight units capable of operating and controlling eight Varian VGE-8006 60 GHz, 200 kW gyrotrons along with their associated waveguide components. This paper will discuss the operational upgrades and the overall system performance. Many modifications were instituted to enhance the system operation and performance. Modifications discussed in this paper include an improved gyrotron tube-fault response network, a computer controlled pulse-timing and sequencing system, and an improved high-voltage power supply control interface. The discussion on overall system performance will include operating techniques used to improve system operations and reliability. The techniques discussed apply to system start-up procedures, operating the system in a conditioning mode, and operating the system during DIII-D plasma operations
Keywords :
fusion reactor design; fusion reactor ignition; fusion reactor operation; fusion reactors; gyrotrons; high-voltage techniques; nuclear engineering computing; nuclear power stations; plasma filled waveguides; plasma radiofrequency heating; plasma toroidal confinement; power supplies to apparatus; power system control; power system reliability; waveguide components; 200 kW; 60 GHz; DIII-D electron cyclotron resonant heating system; DIII-D plasma operations; DIII-D tokamak radiofrequency program; ECRH system; RF program; Varian VGE-8006 gyrotrons; computer controlled pulse-timing system; computer controlled sequencing system; conditioning mode; fusion reactors; gyrotron tube-fault response network; high-voltage power supply control interface; operational upgrades; reliability; start-up procedures; system performance; waveguide components; Control systems; Cyclotrons; Electrons; Gyrotrons; Heating; Pulsed power supplies; Radio frequency; Resonance; System performance; Waveguide components;
Conference_Titel :
Fusion Engineering, 1993., 15th IEEE/NPSS Symposium on
Conference_Location :
Hyannis, MA
Print_ISBN :
0-7803-1412-3
DOI :
10.1109/FUSION.1993.518514
