Isolated data acquisition system for high voltage applications

Conference · Sat Jun 01 00:00:00 EDT 1985

OSTI ID:5291472

Waitz, A; Donaldson, A

This report describes the design and operation of a microcomputer controlled system for acquisition of both analog and binary data within the high voltage stages of a linac modulator. The system is comprised of a microprocessor Controller which communicates with the remote data Acquisition circuits via an optical bus. The bus, which uses a 1 MHz Manchester II format, is configured as a loop, starting at the Controller, daisy-chaining the remote cards and terminating back at the Controller. Upon receiving a linac timing pulse, the Controller sends addressed commands to the individual remote cards and receives data back. It then passes this data to the linac control system through a Multibus connection. Each remote circuit can return 16 binary sense and 7 (12 bit) analog parameters within 270 us. This speed is possible because of a pipelined design where one word is transmitted while another is being converted. A data conversion cycle is initiated when a remote data acquisition card receives the proper command and address from the controller.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 5291472
• Report Number(s): FNAL-TM-1323; CONF-850504-247; ON: DE85016984
• Resource Relation: Conference: Particle accelerator conference, Vancouver, Canada, 13 May 1985; Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
43 PARTICLE ACCELERATORS
LINEAR ACCELERATORS
DATA ACQUISITION SYSTEMS
FERMILAB ACCELERATOR
MICROPROCESSORS
REMOTE SENSING
SYNCHRONIZATION
ACCELERATORS
COMPUTERS
CYCLIC ACCELERATORS
ELECTRONIC CIRCUITS
MICROELECTRONIC CIRCUITS
SYNCHROTRONS
990200* - Mathematics & Computers
430303 - Particle Accelerators- Experimental Facilities & Equipment