Resources

Publications

  • Space-charge effects during half-integer resonance crossing in the CERN Proton Synchrotron Booster

    Author(s): Tirsi Prebibaj, Fanouria Antoniou, Foteini Asvesta, Hannes Bartosik, and Giuliano Franchetti Operation close to half-integer resonances can lead to significant beam quality degradation and beam loss in high-intensity/high-brightness synchrotrons. At the CERN Proton Synchrotron Booster, the controlled crossing of the 2Qy=9 half-integer resonance was experimentally investigated and benchmarked against six-dimensional self-consistent tracking...

  • Data-model-guided framework for systemic emittance minimization in high-brightness photoinjectors

    Author(s): H. Tünnermann, Y. Chen, A. Klemps, D. Ilia, M. Cai, N. Ay, B. Beutner, F. Brinker, W. Decking, J. Good, I. Hartl, W. Hillert, Y. Jiang, C. Li, T. Long, C. Mahnke, H. Panuganti, F. Pressacco, and M. Scholz Emittance minimization in high-brightness photoinjectors is a key challenge for x-ray free-electron lasers. We demonstrate a data- and model-guided framework combining physics-informed laser shaping with inverse emittance modeling...

  • Design of a storage ring based on a fixed-field alternating-gradient configuration with an internal target for heavy-ion beams with stochastic charge ...

    Author(s): Yoshihiro Ishi, Tomonori Uesugi, Yoshiharu Mori, and Katsuhisa Nishio Heavy-ion storage rings with internal targets offer highly efficient production of rare events, but are severely limited by stochastic charge-state conversion at each target interaction, which drives rapid transverse emittance growth. We introduce a concept based on a scaling fixed-field alternating-gradient (FFA) lattice with an azimuthally modulated field index...

  • Charge-exchange cooling of multicharge-state heavy-ion beams

    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...

  • Coherent radiation of ultrashort electron-bunches from linear acceleration

    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...

  • First experimental report of nonlinear collimator in the SuperKEKB

    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...

  • Over 8 hours of continuous operation of a free-electron laser driven by a laser-plasma accelerator

    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...
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