Tune measurement in the NSLS booster synchrotron

Author

Blum, E.B. ; Nawrocky, R.

Author_Institution

Nat. Synchrotron Light Source, Brookhaven Nat. Lab., Upton, NY, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

2246

Abstract

The NSLS booster synchrotron can accelerate an electron beam from approximately 80 to 750 MeV in 0.7 sec. The betatron tunes can change during acceleration by as much as 0.1 units, causing beam loss as they cross resonance lines. Precise measurements with a conventional swept spectrum analyzer have always been difficult because of the rapid variation of tune as the magnets are ramped. We are now using a system based on a Tektronix 3052 digital spectrum analyzer that can obtain a complete frequency spectrum over a 10 MHz bandwidth in 200 μsec. Betatron oscillations are stimulated for the measurements by applying white noise to the beam through stripline electrodes. We will describe the instrumentation, our measurements of tune as a function of time during the acceleration cycle, and the resulting improvements to the booster operation

Keywords

beam handling techniques; electron accelerators; particle beam diagnostics; synchrotrons; tuning; white noise; 0.7 s; 10 MHz; 200 mus; 80 to 750 MeV; NSLS booster synchrotron; Tektronix 3052 digital spectrum analyzer; acceleration cycle; beam loss; betatron oscillations; betatron tunes; booster operation; magnet ramping; resonance lines; stripline electrodes; swept spectrum analyzer; tune measurement; white noise; Acceleration; Bandwidth; Electron beams; Frequency; Magnets; Noise measurement; Particle beams; Resonance; Spectral analysis; Synchrotrons;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.309283

Filename

309283