Proceedings of the Korean Vacuum Society Conference (한국진공학회:학술대회논문집)
- 2012.02a
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- Pages.229-229
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- 2012
Experimental Verification of Transverse Electric Mode Controlled Vacuum Chamber of PLS-II Storage Ring
Abstract
It is significant issue to control the unwanted transverse electric (TE) modes in the vacuum chamber for preventing the position reading noise from the beam position monitor (BPM) of storage ring. We introduce shunt structure to control the frequency distribution of TE resonance modes excited in the vacuum chambers of the Pohang Light Source II (PLS-II). The design of shunt structure is performed using the full three dimensional finite-difference time-domain (FDTD) simulation. It is verified that the sympton of the BPM noise is not oberved up to the beam current of 190 mA in the commmissioning of PLS-II.