Design of shunt structure to avoide TE mode in PLS-II storage ring vacuum chamber

  • Published : 2010.08.18

Abstract

We, previously, proved that the noise in the vertical readback from some of beam position monitors (BPMs) in the vacuum chamber of Pohang Light Source (PLS) are caused by the transverse electric (TE) longitudinal harmonic resonances. Based on this analysis, we now design the shunt structure to remove the TE mode resonces near the BPMs operation frequency of 500 MHz in the storage ring vacuum chamber of PLS upgrade project (PLS-II). The simulation result and experimental test result will be presented.

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