Computer data-acquisition and control system for Thomson-scattering measurements

Technical Report · Tue Mar 01 04:00:00 EST 1983

DOI:https://doi.org/10.2172/6416755· OSTI ID:6416755

Stewart, K. A.; Foskett, R. D.; Kindsfather, R. R.; Lazarus, E. A.; Thomas, C. E.

The Thomson-Scattering Diagnostic System (SCATPAK II) used to measure the electron temperature and density in the Impurity Study Experiment is interfaced to a Perkin-Elmer 8/32 computer that operates under the OS/32 operating system. The calibration, alignment, and operation of this diagnostic are all under computer control. Data acquired from 106 photomultiplier tubes installed on 15 spectrometers are transmitted to the computer by eighteen 12-channel, analog-to-digital integrators along a CAMAC serial highway. With each laser pulse, 212 channels of data are acquired: 106 channels of signal plus background and 106 channels of background only. Extensive use of CAMAC instrumentation enables large amounts of data to be acquired and control processes to be performed in a time-dependent environment. The Thomson-scattering computer system currently operates in three modes: user interaction and control, data acquisition and transmission, and data analysis. This paper discusses the development and implementation of this system as well as data storage and retrieval.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6416755
• Report Number(s): ORNL/TM-8553; ON: DE83008167
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ALIGNMENT
CALIBRATION
CONTROL SYSTEMS
DATA ACQUISITION SYSTEMS
ELECTRON DENSITY
ELECTRON TEMPERATURE
INELASTIC SCATTERING
ISX TOKAMAK
PLASMA DIAGNOSTICS
SCATTERING
THERMONUCLEAR REACTORS
THOMSON SCATTERING
TOKAMAK TYPE REACTORS