Upgrade for the NSTX control computer

D. Mueller; D. A. Gates; J. R. Ferron

doi:10.1109/RTCON.1999.842617

Upgrade for the NSTX control computer

D. Mueller, D. A. Gates, J. R. Ferron

PPPL Advanced Projects

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The National Spherical Torus Experiment (NSTX) is a proof of scientific principle experiment as a magnetic fusion containment device. A primary goal of NSTX operations is control of the plasma current, position and shape in real time for a wide range of plasma pressure and current density profiles. In order to employ the best calculation of the plasma current, position and shape, it is planned to implement the equilibrium analysis code, EFTT, in real-Time, RTEFIT. EFIT inverts the Grad-Shafranov equation and performs a least squares fit to the magnetics data RTEFIT is also capable of providing the plasma current profile and the plasma pressure profile from analysis of diagnostic data. The calculation time for RTEFIT using the present NSTX control computer system is comparable to the expected energy confinement time on NSTX and is thus slower than desired. A computer upgrade based upon 604e processors will permit the RTEFIT calculation loop to complete in about 3 ms. The presence of the passive plates further complicates the control algorithm to be used in conjunction with RTEFlT. The planned approach is to measure the eddy currents in the passive plates and to use the transient response of the coils to minimize the total shell current effect.

Original language	English (US)
Title of host publication	SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999
Editors	Stuart C. Schaller
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	268-270
Number of pages	3
ISBN (Electronic)	078035463X, 9780780354630
DOIs	https://doi.org/10.1109/RTCON.1999.842617
State	Published - 1999
Event	11th IEEE NPSS Real Time Conference - Computer Applications in Nuclear Particle and Plasma Physics, RT 1999 - Santa Fe, United States Duration: Jun 14 1999 → Jun 18 1999

Publication series

Name	SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999

Conference

Conference	11th IEEE NPSS Real Time Conference - Computer Applications in Nuclear Particle and Plasma Physics, RT 1999
Country/Territory	United States
City	Santa Fe
Period	6/14/99 → 6/18/99

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Radiology Nuclear Medicine and imaging
Nuclear and High Energy Physics
Computer Science Applications

Access to Document

10.1109/RTCON.1999.842617

Cite this

Mueller, D., Gates, D. A., & Ferron, J. R. (1999). Upgrade for the NSTX control computer. In S. C. Schaller (Ed.), SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999 (pp. 268-270). Article 842617 (SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RTCON.1999.842617

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title = "Upgrade for the NSTX control computer",

abstract = "The National Spherical Torus Experiment (NSTX) is a proof of scientific principle experiment as a magnetic fusion containment device. A primary goal of NSTX operations is control of the plasma current, position and shape in real time for a wide range of plasma pressure and current density profiles. In order to employ the best calculation of the plasma current, position and shape, it is planned to implement the equilibrium analysis code, EFTT, in real-Time, RTEFIT. EFIT inverts the Grad-Shafranov equation and performs a least squares fit to the magnetics data RTEFIT is also capable of providing the plasma current profile and the plasma pressure profile from analysis of diagnostic data. The calculation time for RTEFIT using the present NSTX control computer system is comparable to the expected energy confinement time on NSTX and is thus slower than desired. A computer upgrade based upon 604e processors will permit the RTEFIT calculation loop to complete in about 3 ms. The presence of the passive plates further complicates the control algorithm to be used in conjunction with RTEFlT. The planned approach is to measure the eddy currents in the passive plates and to use the transient response of the coils to minimize the total shell current effect.",

author = "D. Mueller and Gates, \{D. A.\} and Ferron, \{J. R.\}",

note = "Publisher Copyright: {\textcopyright} 1999 IEEE.; 11th IEEE NPSS Real Time Conference - Computer Applications in Nuclear Particle and Plasma Physics, RT 1999 ; Conference date: 14-06-1999 Through 18-06-1999",

year = "1999",

doi = "10.1109/RTCON.1999.842617",

language = "English (US)",

series = "SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "268--270",

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address = "United States",

}

Mueller, D, Gates, DA & Ferron, JR 1999, Upgrade for the NSTX control computer. in SC Schaller (ed.), SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999., 842617, SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999, Institute of Electrical and Electronics Engineers Inc., pp. 268-270, 11th IEEE NPSS Real Time Conference - Computer Applications in Nuclear Particle and Plasma Physics, RT 1999, Santa Fe, United States, 6/14/99. https://doi.org/10.1109/RTCON.1999.842617

Upgrade for the NSTX control computer. / Mueller, D.; Gates, D. A.; Ferron, J. R.
SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999. ed. / Stuart C. Schaller. Institute of Electrical and Electronics Engineers Inc., 1999. p. 268-270 842617 (SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AB - The National Spherical Torus Experiment (NSTX) is a proof of scientific principle experiment as a magnetic fusion containment device. A primary goal of NSTX operations is control of the plasma current, position and shape in real time for a wide range of plasma pressure and current density profiles. In order to employ the best calculation of the plasma current, position and shape, it is planned to implement the equilibrium analysis code, EFTT, in real-Time, RTEFIT. EFIT inverts the Grad-Shafranov equation and performs a least squares fit to the magnetics data RTEFIT is also capable of providing the plasma current profile and the plasma pressure profile from analysis of diagnostic data. The calculation time for RTEFIT using the present NSTX control computer system is comparable to the expected energy confinement time on NSTX and is thus slower than desired. A computer upgrade based upon 604e processors will permit the RTEFIT calculation loop to complete in about 3 ms. The presence of the passive plates further complicates the control algorithm to be used in conjunction with RTEFlT. The planned approach is to measure the eddy currents in the passive plates and to use the transient response of the coils to minimize the total shell current effect.

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BT - SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999

A2 - Schaller, Stuart C.

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 11th IEEE NPSS Real Time Conference - Computer Applications in Nuclear Particle and Plasma Physics, RT 1999

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Mueller D, Gates DA, Ferron JR. Upgrade for the NSTX control computer. In Schaller SC, editor, SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999. Institute of Electrical and Electronics Engineers Inc. 1999. p. 268-270. 842617. (SANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999). doi: 10.1109/RTCON.1999.842617

Upgrade for the NSTX control computer

Abstract

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All Science Journal Classification (ASJC) codes

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