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WE1A06 |
Pulse-to-pulse Beam Modulation for 4 Storage Rings with 64 Pulsed Magnets |
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- Y. Enomoto, K. Furukawa, T. Kamitani, F. Miyahara, T. Natsui, M. Satoh, K. Yokoyama, M. Yoshida
KEK, Ibaraki, Japan
- H.S. Saotome
Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan
- S. Ushimoto
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
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The KEK injector linac has delivered electrons and positrons for particle physics and photon science experiments for more than 30 years. It is planned to inject electron and positron beams with energies from 2.5 GeV to 7 GeV pulse-by-pulse at 50 Hz into the dual ring SuperKEKB collider and two light source storage rings. As the beam quality requirement from SuperKEKB is demanding, the beam orbit and optics conditions have to be maintained precisely. To that end 64 newly designed pulsed magnets were installed. Quadrupole magnets with the inductance of 1 mH are driven by power supplies with pulses up to 330 A and 0.5 ms, which recover the energy stored in coils up to 65%. Orbit corrector magnets with the inductance of 3 mH are driven with bipolar pulsed power supplies up to 10 A. Those power supplies are controlled under the event-based synchronized controls and monitored pulse-by-pulse, and are confirmed to have the stability over weeks within 0.1%. The details of the design and the operational performance will be reported.
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Slides WE1A06 [6.694 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2018-WE1A06
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About • |
paper received ※ 11 September 2018 paper accepted ※ 19 September 2018 issue date ※ 18 January 2019 |
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THPO127 |
The Effect of Energy Fluctuation on the Multi-bunch Acceleration in E-driven ILC Positron Source |
958 |
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- M. Kuriki, H. Nagoshi
HU/AdSM, Higashi-Hiroshima, Japan
- S. Kashiwagi
Tohoku University, Research Center for Electron Photon Science, Sendai, Japan
- K. Negishi
Iwate University, Morioka, Iwate, Japan
- T. Okugi, T. Omori, M. Satoh, Y. Seimiya, J. Urakawa, K. Yokoya
KEK, Ibaraki, Japan
- Y. Sumitomo
LEBRA, Funabashi, Japan
- T. Takahashi
Hiroshima University, Graduate School of Science, Higashi-Hiroshima, Japan
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E-Driven method is a technical backup for positron source for ILC. In the positron source, the positron is generated and accelerated in a multi-bunch format with gaps in a macro-pulse. We employ AM (Amplitude Modulation) to suppress the transient beam-loading, but a small fluctuation is still expected, depending on the compensation accuracy. In this article, the positron yield which is ratio of numbers of positrons over electrons, is evaluated as a function of the compensation accuracy. With this result and the detail investigation of the beam loading compensation accuracy by AM, the positron yield of E-Driven Positron source for ILC is evaluated.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2018-THPO127
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About • |
paper received ※ 12 September 2018 paper accepted ※ 19 September 2018 issue date ※ 18 January 2019 |
|
Export • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
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