This article is cited in 1 paper

Electron and Ion Beams, Accelerators

Experimental investigation of coupling impedances of the VEPP-4M electron-positron collider

V. A. Kiselev, V. V. Smalyuk

G I. Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk

Abstract: The interaction of a beam with vacuum chamber elements via induced electromagnetic field is analyzed in the frequency domain using frequency-dependent coupling impedances. The knowledge of the impedances makes it possible to estimate the stability conditions for propagation of the beam. The calculation of impedances of accelerators like the VEPP-4M electron-positron collider with a large number of inhomogeneities in the vacuum chamber is a complicated and time-consuming problem. However, the impedances can be studied in such cases experimentally by analyzing the propagation of the beam. The results of experiments on the longitudinal and transverse impedances of VEPP-4M are considered. We describe a method for measuring the local transverse impedance ensuring a higher sensitivity as compared to the methods used earlier.

Received: 26.05.2009

 English version: Technical Physics, 2010, 55:8, 1175–1182

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