Impedance analysis of bunch length measurements at the ATF damping ring

Issue title: Proceedings of the tenth International Symposium on Applied Electromagnetics and Mechanics ISEM-Tokyo

Article type: Research Article

Authors: Bane, K.L.F.^{b; *} | Naito, T.^a | Okugi, T.^a | Qin, Q.^c | Urakawa, J.^a

Affiliations: [a] High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki, Japan | [b] The Stanford Linear Accelerator Center (SLAC), MS-26, P.O. Box 4349, Stanford, CA, 94309 USA | [c] Institute of High Energy Physics (IHEP), Beijing, People's Republic of China

Correspondence: [*] Corresponding author: K.L.F. Bane, Tel.: +1 650 926 2026; Fax: +1 650 926 5368; E-mail: [email protected]

Abstract: We present energy spread and bunch length measurements at the Accelerator Test Facility (ATF) at KEK, as functions of current, for different ring rf voltages, and with the beam both on and off the coupling resonance. We fit the on-coupling bunch shapes to those of an impedance model consisting of a resistor and an inductor connected in series. We find that the fits are reasonably good, but that the resulting impedance is unexpectedly large.

DOI: 10.3233/JAE-2002-389

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 197-202, 2002