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@inproceedings{shobuda:ipac2021-wepab245, author = {Y. Shobuda and K. Horino and J. Kamiya and K. Kotoku and T. Takayanagi and T. Ueno and T. Yanagibashi}, % author = {Y. Shobuda and K. Horino and J. Kamiya and K. Kotoku and T. Takayanagi and T. Ueno and others}, % author = {Y. Shobuda and others}, title = {{A Possible Modification of Ceramic Chambers in the Injection Area at the RCS in J-PARC}}, booktitle = {Proc. IPAC'21}, pages = {3205--3208}, eid = {WEPAB245}, language = {english}, keywords = {impedance, simulation, injection, dipole, proton}, 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-WEPAB245}, url = {https://jacow.org/ipac2021/papers/wepab245.pdf}, note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB245}, abstract = {{The J-PARC RCS is composed of ceramic chambers covered over copper stripes to suppress the eddy current on the chamber. The inductance, comprising the copper stripes and flanges, in combination with the capacitors makes an LCR electric circuit with the chamber and can cause field modulation in the chamber. Though most chambers are not harmful at the RCS, the chambers at the injection area excite beam losses, because a trapezoid field pattern is excited to accumulate LINAC beam during the injection period. In this report, we consider several types of ceramic chambers to suppress the field modulation. One type is a ceramic chamber covered over copper stripes in parallel with damping resistors. Another is that covered over spiral copper stripes with only capacitors.}}, }