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Strahlteilchenphasenmessung und Regelung beim Protonenbeschleuniger COSY

By A. Schnase, Kernforschungsanlage Juelich G.m.b.H. (KFA) (Germany). Inst. fuer Kernphysik and Technische Hochschule Aachen (Germany)

Abstract

Particle accelerators require that the orbit of the charged particles in the vacuum chamber is controlled to fulfil narrow limits. This is done by magnetic deflection systems and exactly adjusted rf-acceleration. Up to now the necessary control-functions were realised with analogue parts. This work describes a digital phase control system that works in real time and is used with the proton accelerator COSY. The physical design of the accelerator sets the accuracy-specifications of the revolution frequency (<1 Hz in the whole range from 400 kHz to 1.6 MHz), the phase-difference (<0.01 ), the signal-to-noise-ratio (<-60 dBc) and the update rate (<1 #mu#s) of the parameters. In a typical operation the beam is first bunched and synchronised to the reference oscillator. After that the beam influences the rf-system with the help of charge detectors and now the rf-systems will be synchronised with the bunched beam. This control-loop is modelled and simulated with PSPICE. (orig.)Available from TIB Hannover: RA 831(2878) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Topics: 20C - Nuclear physics, particle accelerators, SYNCHROTRONS, BEAM BUNCHING, CONTROL SYSTEMS, DIGITAL SYSTEMS, ORBITS, PARTICLE BEAMS, PROTON BEAMS, RF SYSTEMS, SYNCHRONIZATION, COSY STORAGE RING, BEAM MONITORING, REAL TIME SYSTEMS, ACCURACY, SIGNAL-TO-NOISE RATIO, BEAM TRANSPORT, PHASE SHIFT, ALGORITHMS, OPTIMIZATION, REMOTE CONTROL, ELECTRONIC FILTERS, DIGITAL-TO-ANALOG CONVERTERS, ANALOG-TO-DIGITAL CONVERTERS, MODULAR STRUCTURES, PERSONAL COMPUTERS, SIGNAL PROCESSING, DATA PROCESSING
Year: 1994
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Provided by: OpenGrey Repository
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