Tevatron extraction microcomputer

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

OSTI ID:5366607

Chapman, L; Finley, D A; Harrison, M; Merz, W

Extraction in the Fermilab Tevatron is controlled by a multi-processor Multibus microcomputer system called QXR (Quad eXtraction Regulator). QXR monitors several analog beam signals and controls three sets of power supplies: the ''bucker'' and ''pulse'' magnets at a rate of 5760 Hz, and the ''QXR'' magnets at 720 Hz. QXR supports multiple slow spills (up to a total of 35 seconds) with multiple fast pulses intermixed. It linearizes the slow spill and bucks out the high frequency components. Fast extraction is done by outputting a variable pulse waveform. Closed loop learning techniques are used to improve performance from cycle to cycle for both slow and fast extraction. The system is connected to the Tevatron clock system so that it can track the machine cycle. QXR is also connected to the rest of the Fermilab control system, ACNET. Through ACNET, human operators and central computers can monitor and control extraction through communications with QXR. The controls hardware and software both employ some standard and some specialized components. This paper gives an overview of QXR as a control system; another paper summarizes performance.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 5366607
• Report Number(s): FNAL-TM-1322; CONF-850504-252; ON: DE85016985
• Resource Relation: Conference: Particle accelerator conference, Vancouver, Canada, 13 May 1985; Other Information: Paper copy only, copy does not permit microfiche production. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
FERMILAB TEVATRON
COMPUTERIZED CONTROL SYSTEMS
ARRAY PROCESSORS
BEAM EXTRACTION
PROGRAMMING
ACCELERATORS
CONTROL SYSTEMS
CYCLIC ACCELERATORS
SYNCHROTRONS
430302* - Particle Accelerators- Injection & Extraction Systems
430303 - Particle Accelerators- Experimental Facilities & Equipment