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Time Projection Chamber digitizer test system using a microcomputer

Description: A small computer system for testing digitizers, control cards, and backplanes was developed at the Lawrence Berkeley Lab to be used in the Time Projection Chamber (TPC) Detector. The objective of this development was to provide a low cost test system for fast debugging, maintenance, a quality control by outside vendors who fabricated these units as well as Laboratory personnel. When the system was delivered to the vendors, it consisted of the computer programming and documentation necessary to do a complete checkout of approximately 20,000 signal channels. To obtain this low cost system (totaling $1400) a commercial microcomputer with 16K of memory and a printer (40 characters per line, 30 characters per second) were selected. This paper describes the overall test system and programming features including the linking capabilities of the debug program. It also describes the various interfacing techniques that were used to obtain hardcopies.
Date: October 1, 1980
Creator: Nunnally, C.
Partner: UNT Libraries Government Documents Department

Modular multi-wire readout system for proportional wire chambers

Description: From nuclear science symposium; San Francisco, California, USA (14 Nov 1973). The design features of a data readout system for multiwire proportional chambers are described. The electronic circuitry for this amplifier-per-wire'' system has been designed in modular form to provide ease in system assembly, flexibility, and economy. Fast readout of the hit-pattern data is accomplished by using priority encoder integrated circuits for address generation and bit- parallel transfer of the output data words. About 7000 channels have been implemented using this system and an additional 4000 channels have been ordered. An analysis of cost per channel is given, based on the experience gained thus far. (auth)
Date: November 1, 1973
Creator: Olson, S.R.; Kirsten, F.A.; Binnall, E.P.; Lee, K.L.; Bhandari, N.N. & Nunnally, C.C.
Partner: UNT Libraries Government Documents Department