| Paper |
Title |
Page |
| WEPAL020 |
Measurement of Transverse Dipole and Quadrupole Moments with the BPMS in the J-PARC 3-50 BT |
2197 |
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- T. Toyama
J-PARC, KEK & JAEA, Ibaraki-ken, Japan
- H. Kuboki, K. Satou, M. Tejima
KEK, Ibaraki, Japan
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We measure dipole and quadrupole moments of the beam using the BPMs in the beam transport line 3-50BT of J-PARC and obtain differences of squared horizontal- and vertical-rms-sizes for those BPMs. Then we obtain rms emittances and rms momentum by fitting with given Twiss parameters.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAL020
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| THPAK002 |
Updated Model of the Resistive Wall Impedance for the Main Ring of J-PARC |
3204 |
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- B. Yee-Rendón, Y.H. Chin, H. Kuboki, T. Toyama
KEK, Ibaraki, Japan
- M. Schenk
CERN, Geneva, Switzerland
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The resistive wall impedance is one of the major contributors of the impedance in the Main Ring of J-PARC. The present model assumes round chambers of stainless steel with perfect magnet boundary conditions for its surroundings. This work presents the model of the resistive wall impedances taking into account the different chamber geometries of Main Ring, the materials and more realistic surroundings. The models were benchmarked with measurements of the coherent tune shift of the Main Ring of J-PARC. The simulation of beam instabilities is a helpful tool to evaluate potential threats against the machine protection of the high intensity beams.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK002
|
|
| Export • |
reference for this paper using
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※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
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