- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Demonstration of Large Bandwidth Hard X-Ray Free-Electron Laser Pulses at SwissFEL
摘要： We have produced hard x-ray free-electron laser (FEL) radiation with unprecedented large bandwidth tunable up to 2%. The experiments have been carried out at SwissFEL, the x-ray FEL facility at the Paul Scherrer Institute in Switzerland. The bandwidth is enhanced by maximizing the energy chirp of the electron beam, which is accomplished by optimizing the compression setup. We demonstrate continuous tunability of the bandwidth with a simple method only requiring a quadrupole magnet. The generation of such broadband FEL pulses will improve the efficiency of many techniques such as x-ray crystallography and spectroscopy, opening the door to significant progress in photon science. It has already been demonstrated that the broadband pulses of SwissFEL are beneficial to enhance the performance of crystallography, and further SwissFEL users plan to exploit this large bandwidth radiation to improve the efficiency of their measurement techniques.
关键词： large bandwidth,SwissFEL,free-electron laser,spectroscopy,hard x-ray,x-ray crystallography
更新于2025-09-23 15:19:57
-
[IEEE 2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) - Boston, MA (2018.7.8-2018.7.13)] 2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) - Robust Multi-Layer Graphene-Based Plasmonic Cloaking
摘要： In this paper, a plasmonic cloak is designed at 1.55 μm in an epsilon-near-zero (ENZ) comprised of alternating layers of a graphene-silica stack. Because the inclusion is covered by Au and moreover, the ENZ’s boundaries are sealed by this material with optimized thicknesses, such a cloak can only work for TM incidence. This cloak is robust against the inclusion shape which is capable of working in an exceedingly large bandwidth.
关键词： TM incidence,graphene-silica stack,epsilon-near-zero,plasmonic cloak,robust,large bandwidth
更新于2025-09-11 14:15:04