Real-time digital control, data acquisition, and analysis system for the DIII-D multipulse Thomson scattering diagnostic

C. M. Greenfield; G. L. Campbell; T. N. Carlstrom; J. C. DeBoo; C. L. Hsieh; R. T. Snider; P. K. Trost

doi:10.1063/1.1141615

Real-time digital control, data acquisition, and analysis system for the DIII-D multipulse Thomson scattering diagnostic

C. M. Greenfield, G. L. Campbell, T. N. Carlstrom, J. C. DeBoo, C. L. Hsieh, R. T. Snider, P. K. Trost

Research output: Contribution to journal › Article › peer-review

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Abstract

A VME-based real-time computer system for laser control, data acquisition, and analysis for the DIII-D multipulse Thomson scattering diagnostic is described. The laser control task requires precise timing of up to eight Nd:YAG lasers, each with an average firing rate of 20 Hz. A cpu module in a real-time multiprocessing computer system will operate the lasers with evenly staggered laser pulses or in a "burst mode," where all available (fully charged) lasers can be fired at 50-100 μs intervals upon receipt of an external event trigger signal. One or more cpu modules, along with a LeCroy FERA (fast encoding and readout ADC) system, will perform real-time data acquisition and analysis. Partial electron temperature and density profiles will be available for plasma feedback control within 1 ms following each laser pulse. The VME-based computer system consists of two or more target processor modules (25 MHz Motorola 68030) running the VMEexec real-time operating system connected to a Unix-based host system (also a 68030). All real-time software is fully interrupt driven to maximize system efficiency. Operator interaction and (non-real-time) data analysis takes place on a MicroVAX 3400 connected via DECnet.

Original language	English
Pages (from-to)	3286-3288
Number of pages	3
Journal	Review of Scientific Instruments
Volume	61
Issue number	10
DOIs	https://doi.org/10.1063/1.1141615
State	Published - 1990
Externally published	Yes

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title = "Real-time digital control, data acquisition, and analysis system for the DIII-D multipulse Thomson scattering diagnostic",

abstract = "A VME-based real-time computer system for laser control, data acquisition, and analysis for the DIII-D multipulse Thomson scattering diagnostic is described. The laser control task requires precise timing of up to eight Nd:YAG lasers, each with an average firing rate of 20 Hz. A cpu module in a real-time multiprocessing computer system will operate the lasers with evenly staggered laser pulses or in a {"}burst mode,{"} where all available (fully charged) lasers can be fired at 50-100 μs intervals upon receipt of an external event trigger signal. One or more cpu modules, along with a LeCroy FERA (fast encoding and readout ADC) system, will perform real-time data acquisition and analysis. Partial electron temperature and density profiles will be available for plasma feedback control within 1 ms following each laser pulse. The VME-based computer system consists of two or more target processor modules (25 MHz Motorola 68030) running the VMEexec real-time operating system connected to a Unix-based host system (also a 68030). All real-time software is fully interrupt driven to maximize system efficiency. Operator interaction and (non-real-time) data analysis takes place on a MicroVAX 3400 connected via DECnet.",

author = "Greenfield, {C. M.} and Campbell, {G. L.} and Carlstrom, {T. N.} and DeBoo, {J. C.} and Hsieh, {C. L.} and Snider, {R. T.} and Trost, {P. K.}",

year = "1990",

doi = "10.1063/1.1141615",

language = "English",

volume = "61",

pages = "3286--3288",

journal = "Review of Scientific Instruments",

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publisher = "American Institute of Physics",

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T1 - Real-time digital control, data acquisition, and analysis system for the DIII-D multipulse Thomson scattering diagnostic

AU - Greenfield, C. M.

AU - Campbell, G. L.

AU - Carlstrom, T. N.

AU - DeBoo, J. C.

AU - Hsieh, C. L.

AU - Snider, R. T.

AU - Trost, P. K.

PY - 1990

Y1 - 1990

N2 - A VME-based real-time computer system for laser control, data acquisition, and analysis for the DIII-D multipulse Thomson scattering diagnostic is described. The laser control task requires precise timing of up to eight Nd:YAG lasers, each with an average firing rate of 20 Hz. A cpu module in a real-time multiprocessing computer system will operate the lasers with evenly staggered laser pulses or in a "burst mode," where all available (fully charged) lasers can be fired at 50-100 μs intervals upon receipt of an external event trigger signal. One or more cpu modules, along with a LeCroy FERA (fast encoding and readout ADC) system, will perform real-time data acquisition and analysis. Partial electron temperature and density profiles will be available for plasma feedback control within 1 ms following each laser pulse. The VME-based computer system consists of two or more target processor modules (25 MHz Motorola 68030) running the VMEexec real-time operating system connected to a Unix-based host system (also a 68030). All real-time software is fully interrupt driven to maximize system efficiency. Operator interaction and (non-real-time) data analysis takes place on a MicroVAX 3400 connected via DECnet.

AB - A VME-based real-time computer system for laser control, data acquisition, and analysis for the DIII-D multipulse Thomson scattering diagnostic is described. The laser control task requires precise timing of up to eight Nd:YAG lasers, each with an average firing rate of 20 Hz. A cpu module in a real-time multiprocessing computer system will operate the lasers with evenly staggered laser pulses or in a "burst mode," where all available (fully charged) lasers can be fired at 50-100 μs intervals upon receipt of an external event trigger signal. One or more cpu modules, along with a LeCroy FERA (fast encoding and readout ADC) system, will perform real-time data acquisition and analysis. Partial electron temperature and density profiles will be available for plasma feedback control within 1 ms following each laser pulse. The VME-based computer system consists of two or more target processor modules (25 MHz Motorola 68030) running the VMEexec real-time operating system connected to a Unix-based host system (also a 68030). All real-time software is fully interrupt driven to maximize system efficiency. Operator interaction and (non-real-time) data analysis takes place on a MicroVAX 3400 connected via DECnet.

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Real-time digital control, data acquisition, and analysis system for the DIII-D multipulse Thomson scattering diagnostic

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