Resources

Publications

  • Fabrication and test of a 6-tesla-class high-temperature superconducting dipole magnet at 4.2 K

    Author(s): Dmytro Abraimov et al. Can high-temperature superconductors take accelerator dipoles past the limits of Nb-Ti and Nb₃Sn? The U.S. Magnet Development Program and industry partners tested C3, a canted-cosine-theta dipole wound with commercial REBCO CORC® wires, reaching 5.99 T in a 65 mm clear aperture at 4.2 K, with no measurable degradation after a thermal cycle. Field quality and energy loss were limited by strong conductor magnetization...

  • Beam instability induced by the rf cavity accelerating modes and its suppression in the Super Tau-Charm Facility

    Author(s): Wenshu Liang, Tianlong He, Weiwei Li, Yelong Wei, Ye Zou, Qing Luo, and Jingyu Tang High-luminosity electron–positron colliders require ampere-level beam currents, rendering coupled-bunch instabilities driven by RF-cavity accelerating modes a critical concern. For the Super Tau-Charm Facility, we demonstrate that these instabilities can be effectively suppressed over the full 1–3.5 GeV energy range using solely the baseline low-level...

  • Collimation system baseline design for the electron storage ring at the Electron-Ion Collider

    Author(s): Andrii Natochii, Elke-Caroline Aschenauer, Karim Hamdi, Charles Hetzel, Eric Link, Daniel Marx, Christoph Montag, Steven Tepikian, Yunhai Cai, and Yuri Nosochkov High-current electron storage rings require efficient collimation to protect superconducting magnets and minimize detector backgrounds. We present the first baseline collimation system design for the Electron-Ion Collider electron ring, combining optimized lattice integration...

  • 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...
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