Extending DIII-D neutral beam modulated operations with a CAMAC based total on time interlock

Author

Baggest, D.S. ; Broesch, J.D. ; Phillips, J.C.

Author_Institution

Gen. Atomics, San Diego, CA, USA

fYear

1999

fDate

1999

Firstpage

503

Lastpage

506

Abstract

A new total-on-time interlock has increased the operational time limits of the neutral beam systems at DIII-D. The interlock, called the Neutral Beam On-Time-Limiter (NBOTL), is a custom built CAMAC module utilizing a Xilinx 9572 Complex Programmable Logic Device (CPLD) as its primary circuit. The Neutral Beam Injection Systems are the primary source of auxiliary heating for DIII-D plasma discharges and contain eight sources capable of delivering 20 MW of power. The delivered power is typically limited to 3.5 s per source to protect beam-line components, while a DIII-D plasma discharge usually exceeds 5 s. Implemented as a hardware interlock within the neutral beam power supplies, the NBOTL limits the beam injection time

Keywords

CAMAC; fusion reactor design; fusion reactor ignition; fusion reactor operation; nuclear engineering computing; plasma beam injection heating; plasma toroidal confinement; power supplies to apparatus; programmable logic devices; 20 MW; CAMAC based total on time interlock; DIII-D neutral beam modulated operations extension; NBI; Neutral Beam On-Time-Limiter; Xilinx 9572 Complex Programmable Logic Device; auxiliary heating; beam injection time; custom built CAMAC module; fusion reactor; neutral beam power supplies; operational time limits; tokamak; CAMAC; Circuits; Fault location; Heating; Optical modulation; Particle beam injection; Particle beams; Plasma devices; Plasma sources; Programmable logic devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1999. 18th Symposium on

Conference_Location

Albuquerque, NM

Print_ISBN

0-7803-5829-5

Type

conf

DOI

10.1109/FUSION.1999.849888

Filename

849888