Design and preliminary tests of a beam intensity monitor for LEP

Author

Unser, K.B.

Author_Institution

CERN, Geneva, Switzerland

fYear

1989

fDate

20-23 Mar 1989

Firstpage

71

Abstract

The beam intensity monitor for the circulating beams in the CERN LEP (Large Electron-Positron) collider uses toroidal cores of an amorphous magnetic alloy as sensors. It consists of two independent systems. The first system is a current transformer employing a parametric amplifying principle to measure the sum of the currents of both beams (DC component). This system has a resolution better than 0.2 μA and gives the absolute calibration of the monitor. The second system is a passive integrating current transformer to measure the relative charge of each individual bunch. Synchronous analog signal processing corrects for baseline offsets and tracks a selected bunch over many revolutions. This makes it possible to measure the number of circulating particles with great precision and for each bunch separately

Keywords

calibration; current transformers; particle beam diagnostics; LEP; beam intensity monitor; calibration; current transformer; parametric amplifying; passive integrating current transformer; resolution; synchronous analog signal processing; Amorphous magnetic materials; Amorphous materials; Colliding beam devices; Current measurement; Current transformers; Magnetic cores; Magnetic separation; Monitoring; Testing; Transformer cores;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/PAC.1989.73158

Filename

73158