Positron beam position measurement for a beam containing both positrons and electrons

Conference · Thu Aug 01 04:00:00 EDT 1996

OSTI ID:270801

Sereno, N S; Fuja, R ^[1]

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1. Argonne National Lab., IL (United States). Advanced Photon Source

Positron beam position measurement for the Advanced Photon Source (APS) linac beam is affected by the presence of electrons that are also captured and accelerated along with the positrons. This paper presents a method of measuring positron position in a beam consisting of alternating bunches of positrons and electrons. The method is based on Fourier analysis of a stripline signal at the bunching and first harmonic frequencies. In the presence of a mixed species beam, a certain linear combination of bunching and first harmonic signals depends only on the position and charge of one specie of particle. A formula is derived for the stripline signal at all harmonics of the bunching frequency and is used to compute expected signal power at the bunching and first harmonic frequencies for typical electron and positron bunch charges. The stripline is calibrated by measuring the signal power content at the bunching and first harmonic frequencies for a single species beam. A circuit is presented that will be used with an APS positron linac stripline beam position monitor to detect the bunching and first harmonic signals for a beam of positrons and electrons.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 270801
• Report Number(s): ANL/ASD/CP--89465; CONF-9605173--9; ON: DE96012794
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ADVANCED PHOTON SOURCE
BEAM BUNCHING
BEAM MONITORS
BEAM POSITION
CALIBRATION
DESIGN
ELECTRON BEAMS
MEASURING METHODS
POSITRON BEAMS