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Title: Initial operation of NSTX with plasma control

Abstract

First plasma, with a maximum current of 300kA, was achieved on NSTX in February 1999. These results were obtained using preprogrammed coil currents. The first controlled plasmas on NSTX were made starting in August 1999 with the full 1MA plasma current achieved in December 1999. The controlled quantities were plasma position (R, Z) and current (Ip). Variations in the plasma shape are achieved by adding preprogrammed currents to those determined by the control parameters. The control system is fully digital, with plasma position and current control, data acquisition, and power supply control all occurring in the same four-processor real time computer. The system uses the PCS (Plasma Control Software) system designed at General Atomics. Modular control algorithms, specific to NSTX, were written and incorporated into the PCS. The application algorithms do the actual control calculations, with the PCS handling data passing. The control system, including planned upgrades, will be described, along with results of the initial controlled plasma operations. Analysis of the performance of the control system will also be presented.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., Princeton, NJ (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
756721
Report Number(s):
PPPL-3453
TRN: US0003230
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 13 Jun 2000
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; NSTX DEVICE; COMPUTERIZED CONTROL SYSTEMS; POSITIONING; POWER SUPPLIES; ALGORITHMS; PERFORMANCE; OPERATION

Citation Formats

D. Gates, M. Bell, J. Ferron, S. Kaye, J. Menard, D. Mueller, C. Neumeyer, and S. Sabbagh. Initial operation of NSTX with plasma control. United States: N. p., 2000. Web. doi:10.2172/756721.
D. Gates, M. Bell, J. Ferron, S. Kaye, J. Menard, D. Mueller, C. Neumeyer, & S. Sabbagh. Initial operation of NSTX with plasma control. United States. doi:10.2172/756721.
D. Gates, M. Bell, J. Ferron, S. Kaye, J. Menard, D. Mueller, C. Neumeyer, and S. Sabbagh. Tue . "Initial operation of NSTX with plasma control". United States. doi:10.2172/756721. https://www.osti.gov/servlets/purl/756721.
@article{osti_756721,
title = {Initial operation of NSTX with plasma control},
author = {D. Gates and M. Bell and J. Ferron and S. Kaye and J. Menard and D. Mueller and C. Neumeyer and S. Sabbagh},
abstractNote = {First plasma, with a maximum current of 300kA, was achieved on NSTX in February 1999. These results were obtained using preprogrammed coil currents. The first controlled plasmas on NSTX were made starting in August 1999 with the full 1MA plasma current achieved in December 1999. The controlled quantities were plasma position (R, Z) and current (Ip). Variations in the plasma shape are achieved by adding preprogrammed currents to those determined by the control parameters. The control system is fully digital, with plasma position and current control, data acquisition, and power supply control all occurring in the same four-processor real time computer. The system uses the PCS (Plasma Control Software) system designed at General Atomics. Modular control algorithms, specific to NSTX, were written and incorporated into the PCS. The application algorithms do the actual control calculations, with the PCS handling data passing. The control system, including planned upgrades, will be described, along with results of the initial controlled plasma operations. Analysis of the performance of the control system will also be presented.},
doi = {10.2172/756721},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 13 00:00:00 EDT 2000},
month = {Tue Jun 13 00:00:00 EDT 2000}
}

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