TY - JOUR
T1 - Development of a high-resolution cavity-beam position monitor
AU - Inoue, Yoichi
AU - Hayano, Hitoshi
AU - Honda, Yosuke
AU - Takatomi, Toshikazu
AU - Tauchi, Toshiaki
AU - Urakawa, Junji
AU - Komamiya, Sachio
AU - Nakamura, Tomoya
AU - Sanuki, Tomoyuki
AU - Kim, Eun San
AU - Shin, Seung Hwan
AU - Vogel, Vladimir
PY - 2008/6/16
Y1 - 2008/6/16
N2 - We have developed a high-resolution cavity-beam position monitor (BPM) to be used at the focal point of the ATF2, which is a test beam line that is now being built to demonstrate stable orbit control at ∼nanometer resolution. The design of the cavity structure was optimized for the Accelerator Test Facility (ATF) beam in various ways. For example, the cavity has a rectangular shape in order to isolate two dipole modes in orthogonal directions, and a relatively thin gap that is less sensitive to trajectory inclination. A two stage homodyne mixer with highly sensitive electronics and phase-sensitive detection was also developed. Two BPM blocks, each containing two cavity BPMs, were installed in the existing ATF beam line using a rigid support frame. After testing the basic characteristics, we measured the resolution using three BPMs. The system demonstrated 8.7 nm position resolution over a dynamic range of 5μm.
AB - We have developed a high-resolution cavity-beam position monitor (BPM) to be used at the focal point of the ATF2, which is a test beam line that is now being built to demonstrate stable orbit control at ∼nanometer resolution. The design of the cavity structure was optimized for the Accelerator Test Facility (ATF) beam in various ways. For example, the cavity has a rectangular shape in order to isolate two dipole modes in orthogonal directions, and a relatively thin gap that is less sensitive to trajectory inclination. A two stage homodyne mixer with highly sensitive electronics and phase-sensitive detection was also developed. Two BPM blocks, each containing two cavity BPMs, were installed in the existing ATF beam line using a rigid support frame. After testing the basic characteristics, we measured the resolution using three BPMs. The system demonstrated 8.7 nm position resolution over a dynamic range of 5μm.
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U2 - 10.1103/PhysRevSTAB.11.062801
DO - 10.1103/PhysRevSTAB.11.062801
M3 - Article
AN - SCOPUS:45749116543
SN - 1098-4402
VL - 11
JO - Physical Review Special Topics - Accelerators and Beams
JF - Physical Review Special Topics - Accelerators and Beams
IS - 6
M1 - 062801
ER -