Resources

Publications

  • Radiation environment at FCC-ee experimental insertion regions

    Author(s): Alessandro Frasca, Manuela Boscolo, Giacomo Broggi, Roderik Bruce, Francesco Cerutti, Andrea Ciarma, Barbara Humann, Narender Kumar, Anton Lechner, Giuseppe Lerner, Giulia Nigrelli, Fabrizio Palla, and Carsten P. Welsch The electron–positron Future Circular Collider (FCC-ee) is an ambitious post-LHC project at CERN, designed to deliver collisions at four interaction points along a 91-km ring. At the experimental insertions, multiple...

  • Direct neutron reactions in storage rings utilizing a supercompact cyclotron neutron target

    Author(s): Ariel Tarifeño-Saldivia, César Domingo-Pardo, Iris Dillmann, and Yuri A. Litvinov Measuring neutron-capture cross sections on radioactive nuclei is one of the main open challenges in nuclear astrophysics, yet no existing technique can reach most of the relevant isotopes. We present the conceptual design of a free-neutron target driven by a supercompact cyclotron, optimized for integration into a low-energy ion storage ring using readily...

  • Multicolor x-ray free-electron laser generation using optical klystron for multiframe diffraction imaging

    Author(s): Xiaodan Liu, Hanxiang Yang, Bingyang Yan, Yue Wang, Nanshun Huang, Liqi Han, Jie Cai, Han Wen, Jinqing Yu, Haixiao Deng, and Xueqing Yan X-ray free-electron lasers provide new opportunities for probing ultrafast dynamical processes in matter. Here we present a four-color XFEL scheme for multiframe diffraction imaging, in which the whole electron beam is used to generate pulses with adjustable wavelength separation and controllable time...

  • 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...
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