Soudan 2 data acquisition and trigger electronics
The 1.1 kton Soudan 2 calorimetric drift-chamber detector is read out by 16K anode wires and 32K cathode strips. Preamps from each wire or strip are bussed together in groups of 8 to reduce the number of ADC channels. The resulting 6144 channels of ionization signal are flash-digitized every 200 ns and stored in RAM. The raw data hit patterns are continually compared with programmable trigger multiplicity and adjacency conditions. The data acquisition process is managed in a system of 24 parallel crates each containing an Intel 80C86 microprocessor, which supervises a pipe-lined data compactor, and allows transfer of the compacted data via CAMAC to the host computer. The 80C86's also manage the local trigger conditions and can perform some parallel processing of the data. Due to the scale of the system and multiplicity of identical channels, semi-custom gate array chips are used for much of the logic, utilizing 2.5 micron CMOS technology.
- Research Organization:
- Argonne National Lab., Argonne, IL 60439
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5810593
- Report Number(s):
- CONF-851009-
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Journal Name: IEEE Trans. Nucl. Sci.; (United States) Vol. NS-33:1; ISSN IETNA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANALOG-TO-DIGITAL CONVERTERS
ANODES
ARRAY PROCESSORS
CAMAC SYSTEM
CATHODES
COMPUTERS
DATA ACQUISITION
DATA-FLOW PROCESSING
DRIFT CHAMBERS
ELECTRODES
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
IONIZATION
MEASURING INSTRUMENTS
MEMORY DEVICES
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
MOS TRANSISTORS
MULTIWIRE PROPORTIONAL CHAMBERS
PARALLEL PROCESSING
PROGRAMMING
PROPORTIONAL COUNTERS
PULSE CIRCUITS
RADIATION DETECTORS
SEMICONDUCTOR DEVICES
SHOWER COUNTERS
SIGNALS
TRANSISTORS
TRIGGER CIRCUITS
WIRES