Enhanced Schottky signals from electron-cooled, coasting beams in a heavy-ion storage ring

Measurements at the Test Storage Ring of the Max-Planck-Institut für Kernphysik in Heidelberg (Germany) have shown that the signal amplitude induced in a Schottky-noise pickup electrode by a coasting electron-cooled ion beam can be greatly enhanced by exposure of the latter to a perturbing radiofreq...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2011-02, Vol.629 (1), p.1-5
Main Authors: Krantz, C., Blaum, K., Grieser, M., Litvinov, Yu.A., Repnow, R., Wolf, A.
Format: Article
Language:English
Subjects:
Accelerators
Amplitudes
Beams (radiation)
Coasting
Electrodes
Electron cooling
Fourier analysis
Ion beams
Radiofrequency
Schottky noise
Storage ring
Storage rings (particle accelerators)
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Summary:Measurements at the Test Storage Ring of the Max-Planck-Institut für Kernphysik in Heidelberg (Germany) have shown that the signal amplitude induced in a Schottky-noise pickup electrode by a coasting electron-cooled ion beam can be greatly enhanced by exposure of the latter to a perturbing radiofrequency signal which is detuned from the true beam revolution frequency. The centre frequencies obtained from harmonic analysis of the observed pickup signal closely follow those imposed on the ions by the electron cooling force. The phenomenon can be exploited to measure the true revolution frequency of ion beams of very low intensity, whose pure Schottky noise is too weak to be measurable under normal circumstances.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2010.12.034