An improved resistive wall monitor | Zendy

B. Fellenz | Zendy; Jim Crisp | Zendy

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An improved resistive wall monitor

Author(s) -

B. Fellenz,

Jim Crisp

Publication year - 1998

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.57030

Subject(s) - resistive touchscreen , materials science , calibration , optics , aperture (computer memory) , ferrite (magnet) , electrical impedance , fermilab , electromagnetic interference , acoustics , beam (structure) , ohm , microwave , electrical engineering , engineering , physics , composite material , telecommunications , particle physics , quantum mechanics

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.

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