The Los Alamos Neutron Scattering Center data acquisition system
The FASTBUS subsystem of the LANSCE data acquisition system consists of a single FASTBUS crate segment with four custom modules and a QPI interface for the VAX. Since experiments at the LANSCE facility always include a time-of-flight parameter for the detected neutron and may optionally include additional position parameters characterizing the event, a time stamp is generated for each event by the Programmable Master Clock (PMC) module. The time and any position information are latched into the Time-Of-Flight buffer (TOF) module. After all events associated with a single neutron burst have been captured in a frame buffer internal to the TOF module, each event is analyzed by the MAPPER module and reduced to a histogram address to increment in the BULKSTORE module. Software access to the histogram is provided through the QPI interface.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Scientific Systems International, Los Alamos, NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6536964
- Report Number(s):
- LA-UR-87-1825; CONF-870552-5; ON: DE87010140
- Resource Relation:
- Conference: 5. conference on real-time computer applications in nuclear, particle, and plasma physics, San Francisco, CA, USA, 12 May 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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