Published July 27, 1992 | Version v1
Report Open

Effect of vacuum chamber eddy current and compensation by digital feedback

Creators

Description

Measurement of the effect of the eddy current induced in the APS storage ring vacuum chamber by the storage ring sextupole magnet and its compensation using digital feedback with proportional, integral, and derivative (PID) control algorithm are presented. The magnetic field in the vacuum chamber shows strong quadrupole and sextupole components varying with frequency, in addition to significant attenuation and phase shift. Large changes in the magnet resistance and inductance were also observed. Development of a theory of digital feedback to obtain system responses and the conditions for optimal control will be described, in conduction with design of a digital filter to compensate for the eddy current effect

Availability note (English)

MF available from INIS under the Report Number; Also available from OSTI as DE95015387; NTIS; US Govt. Printing Office Dep.

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Additional details

Publishing Information

Imprint Pagination
30 p.
Report number
LS--209

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
27001881
Subject category
S43: PARTICLE ACCELERATORS;
Descriptors DEI
ADVANCED PHOTON SOURCE; ALGORITHMS; BEAM MONITORING; BEAM MONITORS; BEAM POSITION; CORRECTIONS; DIGITAL FILTERS; EDDY CURRENTS; FEEDBACK; FREQUENCY DEPENDENCE; FREQUENCY MEASUREMENT; MAGNETIC FIELD CONFIGURATIONS; PRESSURE VESSELS; VACUUM SYSTEMS
Descriptors DEC
CONTAINERS; CURRENTS; ELECTRIC CURRENTS; MEASURING INSTRUMENTS; MONITORING; MONITORS; RADIATION SOURCES; STORAGE RINGS; SYNCHROTRON RADIATION SOURCES

Optional Information

Contract/Grant/Project number
Contract W-31-109-ENG-38
Funding organization
USDOE, Washington, DC (United States).