A Data Acquisition Command Interface Using VAX/VMS DCL

Instrument criteria are presented for the Low-Q Diffractometer (LOD) at the LOS Alamos Neutron Scattering Center (LANSCE), and a design is shown to meet these criteria. The collimator consists of q ultiple-aperture pinhole platea, qnd incorporates "dynamic gravity focusing" to center all wavelengths on the detector. Preliminary test results, making use of the Proton Storage Ring, a liquid hydrogen u operator, and tvo different position-sensitive detectors are shown.

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The Low-Q Diffractometer at the Los Alamos Neutron Scattering Center

Seeger

Hjelm

Nutter

1990

Molecular Crystals and Liquid Crystals Incorporating Nonlinear

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Configuration for the WNR Data Acquisition System for Neutron Measurements

Nelson

Barrus

Cort

et al. 1985

IEEE Trans. Nucl. Sci.

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The Design and Performance of the Parallel Multiprocessor Nuclear Physics Data Acquisition System, DAPHNE

Welch

Moog

Daly

et al. 1987

IEEE Trans. Nucl. Sci.

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The ever Increasing complexity of nuclear physics experiments places severe demands on computerized data acquisition systems. A natural evolution of these systems, taking advantage of the Independent nature of "evants", Is to use Identical parallel microcomputers In a front end to simultaneously analyze separate events. Such a system has been developed at Argonne to serve the needs of the experimental program of ATLAS, a new superconducting heavy-Ion accelerator and other on-going research. Using microcomputers based on the National Semiconductor 32016 microprocessor housed In a Multibus I cage, CPU power equivalent to several VAXs Is obtained at a fraction of the cost of one VAX. The front end Interfaces to a VAX 11/750 on which an extensive user friendly command language based on DCL resides. The whole system, known as DAPHNE, also provides the means to replay data using the same command language. Design concepts, data structures, performance, and experience to date are discussed.

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A Data Acquisition Command Interface Using VAX/VMS DCL

Cited by 4 publications

References 3 publications

The Low-Q Diffractometer at the Los Alamos Neutron Scattering Center

The Low-Q Diffractometer at the Los Alamos Neutron Scattering Center

Configuration for the WNR Data Acquisition System for Neutron Measurements

The Design and Performance of the Parallel Multiprocessor Nuclear Physics Data Acquisition System, DAPHNE

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