An improved resistive wall monitor

Journal Article · Thu Dec 10 00:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.57030· OSTI ID:21202400

Fellenz, Brian; Crisp, Jim ^[1]

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1. Fermi National Accelerator Laboratory P.O. Box 500, Batavia, Illinois 60510 (United States)

Resistive wall monitors were designed and built for the Fermilab Main Injector project. These devices measure longitudinal beam current from 3 KHz to 4 GHz with a 1 ohm gap impedance. The new design provides a larger aperture and a calibration port to improve the accuracy of single-bunch intensity measurements. Microwave absorber material is used to reduce interference from spurious electromagnetic waves traveling inside the beam pipe. Several types of ferrite materials were evaluated for the absorber. Inexpensive ferrite rods were selected and assembled in an array forming the desired geometry without machining.

• OSTI ID: 21202400
• Journal Information: AIP Conference Proceedings, Vol. 451, Issue 1; Conference: 8. beam instrumentation workshop, Stanford, CA (United States), 4-7 May 1998; Other Information: DOI: 10.1063/1.57030; (c) 1998 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
APERTURES
BEAM CURRENTS
BEAM INJECTION
BEAM MONITORING
BEAM MONITORS
BEAM PROFILES
CALIBRATION
DESIGN
ELECTRIC CURRENTS
FERMILAB
FERRITE
GHZ RANGE
IMPEDANCE
KHZ RANGE
MICROWAVE RADIATION
PROTON BEAMS