Control system for the lithium beam edge plasma current density diagnostic on the DIII-D tokamak

Author

Peavy, J.J. ; Gary, W.P. ; Thomas, D.M. ; Kellman, D.H. ; Hoyt, D.M. ; Delaware, S.W. ; Pronko, S.G.E. ; Harris, T.E.

Author_Institution

Fusion Group, Gen. Atomics, San Diego, CA, USA

fYear

2003

Firstpage

344

Lastpage

346

Abstract

An edge plasma current density diagnostic employing a neutralized lithium ion beam system has been installed on the DIII-D tokamak. The lithium beam control system is designed around a GE Fanuc 90-30 series PLC and Cimplicity^® HMI (human machine interface) software. The control system operates and supervises a collection of commercial and in-house designed high voltage power supplies for beam acceleration and focusing, filament and bias power supplies for ion creation, neutralization, vacuum, triggering, and safety interlocks. This paper provides an overview of the control system, while highlighting innovative aspects including its remote operation, pulsed source heating and pulsed neutralizer heating, optimizing beam regulation, and beam ramping, ending with a discussion of its performance.

Keywords

Tokamak devices; current density; physical instrumentation control; plasma diagnostics; plasma toroidal confinement; plasma transport processes; reviews; Cimplicity HMI; DIII-D tokamak; GE Fanuc 90-30 series; PLC; beam acceleration; beam focusing; beam ramping; bias power supplies; filament; high voltage power supplies; human machine interface software; ion creation; lithium beam control system; lithium beam edge plasma current density diagnostic; neutralization; neutralized lithium ion beam system; optimizing beam regulation; overview; pulsed neutralizer heating; pulsed source heating; remote operation; safety interlocks; triggering; vacuum; Control systems; Current density; Heating; Lithium; Particle beams; Plasma density; Plasma diagnostics; Power supplies; Pulsed power supplies; Tokamaks;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 2003. 20th IEEE/NPSS Symposium on

Print_ISBN

0-7803-7908-X

Type

conf

DOI

10.1109/FUSION.2003.1426654

Filename

1426654