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Author(s): Hiroshi Imao We introduce a novel beam-cooling concept for multicharge-state heavy-ion beams based on a new multi-zone stripper configuration in a charge stripper ring, where stochastic charge-state transitions combined with charge-state-dependent closed-orbit shifts turn charge exchange—normally associated with beam heating—into a mechanism for rapid cooling. Numerical simulations show substantial emittance reduction within tens of...

Author(s): R. J. McGuigan and S. P. Jamison We show that purely linear acceleration of ultra-short electron bunches results in emission of a significant amount of radiation in regimes within reach of current experiments. In cases relevant to plasma acceleration, with fields of 10’s of GV/m, radiation losses are around 100µJ with losses increasing for larger acceleration field strength and shorter bunches. We also predict that acceleration with...

Author(s): Shinji Terui, Yoshihiro Funakoshi, Naoko Iida, Takuya Ishibashi, Haruyo Koiso, Akio Morita, Shu Nakamura, Yukiyoshi Ohnishi, Hiroshi Sugimoto, Kyo Shibata, Kenta Uno, Mulee Yao, Giacomo Broggi, Katsunobu Oide, Andrii Natochii, and Qingyuan Liu This paper presents the first experimental demonstration of a nonlinear collimator in the SuperKEKB low-energy ring. By using a pair of skew-sextupole magnets, the system enables efficient beam...

Author(s): F. Kohrell, S. K. Barber, C. E. Doss, K. Jensen, S. Schröder, C. Berger, Z. Eisentraut, K. Nakamura, A. J. Gonsalves, F. Isono, G. R. Plateau, R. A. van Mourik, M. Gracia-Linares, L. Labun, B. M. Hegelich, S. V. Milton, C. G. R. Geddes, J. Osterhoff, E. H. Esarey, C. B. Schroeder, F. Grüner, and J. van Tilborg Laser-Plasma Accelerators (LPAs) have emerged as novel, compact drivers for Free-Electron Lasers (FELs), demonstrated most recently...

Author(s): Pei Zhang, Xinying Zhang, Lin Guo, Qiang Ma, Jin Dai, Tongming Huang, Hongjuan Zheng, Fanbo Meng, Zhenghui Mi, Haiying Lin, Qunyao Wang, Dongbing Li, Facheng Zhao, Song Jin, and Jian Li In 2025, the 166.6 MHz high-power, high-order-modes-damped β = 1 quarter-wave superconducting cavity modules—developed for the High Energy Photon Source—successfully accelerated a 100 mA electron beam. This milestone marks the world’s first use of a...

Author(s): Wei Qin, Yulu Huang, Yuan He, Zheng Gao, Longbo Shi, Jiaosai Li, Chenxing Li, Weiping Dou, Xiaofeng Jin, Zhouli Zhang, Zongheng Xue, Yujuan Zhao, Tiancai Jiang, Yupeng Yang, Yuhui Guo, Shilong Gao, Yuqi Xin, and Ruoxu Wang The accelerating structure is a key component of particle linear accelerators. The innovative S-band RF cavity (operating at 3 GHz) that we have developed and tested at high-power pushes the frontiers of high gradient...

Author(s): M. Aiba, M. Böge, H. Braun, C. Calzolaio, K. Dreyer, R. Ganter, P. Lerch, G. Montenero, R. Riccioli, B. Riemann, S. Sanfilippo, S. Sidorov, A. Streun, V. Vranković, and C. Zoller Fourth-generation light sources achieve unprecedented photon beam brightness by dramatically increasing the density of magnets in storage rings, pushing the limits of accelerator design. SLS 2.0, the first storage ring to incorporate a substantial number of...