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Title: A transverse bunch by bunch feedback system for Pohang Light Source upgrade

The Pohang Light Source upgrade (PLS-II) project has successfully upgraded the Pohang Light Source (PLS). The main goals of the PLS-II project are to increase the beam energy to 3 GeV, increase the number of insertion devices by a factor of two (20 IDs), increase the beam current to 400 mA, and at the same time reduce the beam emittance to below 10 nm by using the existing PLS tunnel and injection system. Among 20 insertion devices, 10 narrow gap in-vacuum undulators are in operation now and two more in-vacuum undulators are to be installed later. Since these narrow gap in-vacuum undulators are most likely to produce coupled bunch instability by the resistive wall impedance and limit the stored beam current, a bunch by bunch feedback system is implemented to suppress coupled bunch instability in the PLS-II. This paper describes the scheme and performance of the PLS-II bunch by bunch feedback system.
Authors:
; ; ;  [1] ; ;  [2]
  1. Pohang Accelerator Laboratory, Pohang, Kyungbuk 790-834 (Korea, Republic of)
  2. SPring-8, Kouto, Sayo-cho, Sayo-gun Hyogo 679-5198 (Japan)
Publication Date:
OSTI Identifier:
22392291
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAM CURRENTS; FEEDBACK; GEV RANGE 01-10; IMPEDANCE; INSTABILITY; OPERATION; PERFORMANCE; POHANG LIGHT SOURCE; WIGGLER MAGNETS