Resources

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...

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...

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...

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...

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...

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...