THPS038

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URL	https://doi.org/10.18429/JACoW-IPAC25-THPS038
Title	Study on a novel laser fast abort system for SuperKEKB
Authors	R. Zhang, H. Kaji, H. Nakayama, K. Uno High Energy Accelerator Research Organization H. Kakuno Tokyo City University, University of Tokyo H. Murakami Kobayashi-Maskawa Institute K. Kitamura Tokyo Metrolopolitan University K. Yoshihara University of Hawaii System, University of Hawaii S. Kitada, T. Iijima Nagoya University
Abstract	To ensure stable and continuous commissioning of SuperKEKB, the machine protection system (MPS) plays a crucial role in safeguarding the accelerator's hardware from damage caused by beam loss. The response time of the MPS is a critical factor in mitigating hardware damage caused by the radiation of abnormal beams. In this study, we investigate a novel laser fast abort system for the SuperKEKB accelerator to reduce the response time of the beam abort trigger. The laser, serving as the trigger signal, is transmitted through free space. Compared to the traditional method, the transmission speed is 1.5 times faster than that in optical fiber. This faster signal transmission can shorten the abort time, enabling the realization of effective MPS. The optical design for long-distance laser beam propagation and measurement of coupled laser power have been studied. Investigation will be conducted regarding the long-term stability of the laser beam inside the accelerator tunnel.
Paper	download: THPS038.pdf
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Conference	16th International Particle Accelerator Conference
Series
Location	Taipei, Taiwan
Date	01-06 Jun 2025
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	* Ming-Chyuan Lin - National Synchrotron Radiation Research Center * Yoichi Sato - KEK * Jui-Che Huang - National Synchrotron Radiation Research Center * David Button - Australian Nuclear Science and Technology Organisation * Ping-Shun Chuang - National Synchrotron Radiation Research Center
Online ISBN	978-3-95450-248-6
Online ISSN	2673-5490
Received	27 May 2025
Revised	31 May 2025
Accepted	04 June 2025
Issued	06 June 2025
DOI	10.18429/JACoW-IPAC25-THPS038
Pages	2998-3000
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.