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@inproceedings{terui:ipac2021-wepab358,
author = {S. Terui and T. Abe and Y. Funakoshi and T. Ishibashi and H.N. Nakayama and A. Natochii and K. Ohmi and D. Zhou},
% author = {S. Terui and T. Abe and Y. Funakoshi and T. Ishibashi and H.N. Nakayama and A. Natochii and others},
% author = {S. Terui and others},
title = {{Development of Low-Z Collimator for SuperKEKB}},
booktitle = {Proc. IPAC'21},
pages = {3537--3540},
eid = {WEPAB358},
language = {english},
keywords = {impedance, cavity, electron, positron, operation},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-WEPAB358},
url = {https://jacow.org/ipac2021/papers/wepab358.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB358},
abstract = {{Collimator jaws for SuperKEKB main ring, which is an electron-positron collider, installed to suppress background noise in a particle detector complex named Belle II. The collimators are successful to reduce backgrounds when the collimator was closed. But, in high current operations with 500 mA or more, jaws were occasionally damaged by hitting abnormal beams. This trouble is a low-frequency, which is once-a-commissioning period currently, but a high-consequence one because we are not able to apply high voltage on detectors in Belle II by high backgrounds. Low-Z collimator jaw, that is durable through hitting uncontrollable beam, have been designed due to protect important component as the solution of the trouble. The low-Z collimator jaws are installable in a present collimator chamber, have a pair of vertically opposed movable jaws. One pair of low-Z collimator jaws was installed. The paper is to describe what did we calculate and measure to make a low-Z collimator, how did we make a low-Z collimator, the impact of the installed low-Z collimator, mainly transverse mode coupling instability.}},
}