Study of 60 Hz Beam Orbit Fluctuations in the Taiwan Photon Source

Huang, Chih-Hsien; Cheng, Yung-Sen; Chiu, Pei-Chen; Hsu, Kuo-Tung; Hu, Kuo Hwa; Liao, Chih-Yu; Wu, Chunyi

doi:10.18429/JACoW-IPAC2017-TUPAB107

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RIS citation export for TUPAB107: Study of 60 Hz Beam Orbit Fluctuations in the Taiwan Photon Source

TY - CONF
AU - Huang, C.H.
AU - Cheng, Y.-S.
AU - Chiu, P.C.
AU - Hsu, K.T.
AU - Hu, K.H.
AU - Liao, C.Y.
AU - Wu, C.Y.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - Study of 60 Hz Beam Orbit Fluctuations in the Taiwan Photon Source
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - The Taiwan Photon Source is a 3 GeV synchrotron light source at NSRRC. To achieve high quality experimental results, it is important to minimize beam motion. During the installation of insertion devices and front-ends, the beam motion around 60 Hz became significant. The response matrix together with singular value decomposition was used to identify the transmitter of the superconducting radio frequency system as the source for the 60 Hz perturbations. This was subsequently corrected by rerouting the grounding of the mains in the transmitters. Yet, the 60Hz orbit fluctuation became even more serious after the next shutdown. A serious of experiments are performed to dig out that the beam was disturbed by the magnetic field from newly installed fan motors. Shielding the fans with mu-metal and increasing the distance between fan and beam pipe drastically reduced the leakage field and greatly increased beam stability. These errors could be prevented at the design stage in the ideal case. However, these errors happened finally and need to be dug out and eliminated. The method and experiences are summarized in this report. These will benefit others who facing the similar problems.
PB - JACoW
CP - Geneva, Switzerland
SP - 1566
EP - 1569
KW - SRF
KW - vacuum
KW - shielding
KW - photon
KW - insertion-device
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-TUPAB107
UR - http://jacow.org/ipac2017/papers/tupab107.pdf
ER -