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One-dimensional ordering in coasting and bunched beams

H Danared, A Källberg and A Simonsson

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The sudden reduction of momentum spread, and under certain conditions also of Schottky-noise power, that has been observed with electron-cooled coasting beams of highly charged ions at several storage rings, has been interpreted as the effect of a one-dimensional ordering of the beams. At CRYRING, first observations of a momentum-spread reduction have also been made with bunched beams. We discuss models of one-dimensional ordering and compare model predictions of Schottky-noise power, and in the case of bunched beams the bunch length, with experimental results from CRYRING.


PACS

05.40.Ca Noise

41.75.Fr Electron and positron beams

Subjects

Accelerators, beams and electromagnetism

Statistical physics and nonlinear systems

Dates

Issue 5 (14 March 2003)

Received 22 October 2002, in final form 13 January 2003

Published 24 February 2003



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