An automated BPM characterization system for LEDA

An automated and highly accurate system for 'mapping' 5 cm-diameter beam position monitors (BPMs) used in the Low Energy Demonstrator Accelerator (LEDA) at Los Alamos is described. Two-dimensional data is accumulated from the four micro-stripline electrodes in the probe by sweeping an ante...

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Bibliographic Details
Published inAIP conference proceedings Vol. 451; no. 1
Main Authors Shurter, R. B., Gilpatrick, J. D., Ledford, J., O'Hara, J., Power, J.
Format Journal Article
LanguageEnglish
Published United States 10.12.1998
Subjects
ACCELERATORS
ANTENNAS
APERTURES
BEAM BUNCHING
BEAM MONITORING
BEAM MONITORS
BEAM POSITION
CALIBRATION
CONTROL SYSTEMS
DESIGN
ELECTRODES
MHZ RANGE
PARTICLE ACCELERATORS
PARTICLE BEAMS
PROBES
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Summary:An automated and highly accurate system for 'mapping' 5 cm-diameter beam position monitors (BPMs) used in the Low Energy Demonstrator Accelerator (LEDA) at Los Alamos is described. Two-dimensional data is accumulated from the four micro-stripline electrodes in the probe by sweeping an antenna driven at the LEDA bunching frequency of 350 MHz in discrete steps across the aperture. These data are then used to determine the centroid, first- and third-order sensitivities of the BPM. These probe response coefficients are then embedded in the LEDA control system database to provide normalized beam position information to the operators. A short summary of previous systems we have fielded is given, along with their attributes and deficiencies that had a bearing on this latest design. Lessons learned from this system will, in turn, be used on the next mappers that are currently being designed for 15 cm and 2.5 cm BPMs.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.57009