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Proceedings Paper

Entropy, reversible and irreversible emittance growth
Author(s): Patrick G. O'Shea
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Paper Abstract

In this paper we examine the connection between emittance growth and entropy growth in linear accelerators. We divide emittance growth into two classes: reversible and irreversible, depending on the corresponding entropy change. We propose the general hypothesis that if (Delta) E > 0 and (Delta) S equals 0, then the emittance growth may be reversible. We also propose that if (Delta) E > 0 and (Delta) S > 0 then the emittance growth is irreversible. We outline how the concept may be applied to particular cases of relevance e.g. emittance growth and recovery in electron photoinjectors, and wakefield induced emittance growth, where correlations are introduced in the transverse phase space.

Paper Details

Date Published: 25 September 1995
PDF: 6 pages
Proc. SPIE 2522, Electron-Beam Sources and Charged-Particle Optics, (25 September 1995); doi: 10.1117/12.221610
Show Author Affiliations
Patrick G. O'Shea, Duke Univ. (United States)


Published in SPIE Proceedings Vol. 2522:
Electron-Beam Sources and Charged-Particle Optics
Eric Munro; Henry P. Freund, Editor(s)

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