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MOIAA01 |
Progress of steady-state microbunching research | |
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Funding: Work supported by the National Key Research and Development Program of China No. 2022YFA1603400 and the Tsinghua University Initiative Scientific Research Program No. 20197050028, 20191081195. Steady-state microbunching (SSMB) is a new concept radiation-generation mechanism that utilizes laser and a specially designed magnetic lattice to create and maintain fine structures in a high-quality electron beam for coherent light emission [1]. The SSMB concept combines major advantages of conventional synchrotron light sources and linac-based free-electron lasers. It opens up a rich field for beam dynamics research and holds tremendous potential as one of the candidate options for next-generation light source for advanced semiconductor fabrication. The proof-of-principle demonstration experiment of SSMB has been accomplished [2]. R&D on a complete dedicated SSMB facility is currently underway [3]. In this talk, we will report on the progress on the beam dynamics design and optimization, as well as the key components including the laser enhancement cavity and electron injector of a SSMB light source. [1] Phys. Rev. Lett. 105, 154801 (2010) [2] Nature 590, 576¿579 (2021). [3] Acta Phys. Sin. 71, 152901 (2022). |
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| MOPB039 | Low-Alpha Storage Ring Design for Steady-State Microbunching to Generate EUV Radiation | 88 |
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| A new concept is proposed for minimizing the longitudinal emittance of a low momentum compaction factor (low-alpha) storage ring which has the capability to stably store sub-femtosecond electron bunches for the first time. This storage ring is designed for Steady-State microbunching (SSMB) to generate kW level average power EUV radiation. The proposed design approach can be applied to any quasi-isochronous storage rings to yield very high radiation power due to longitudinal coherence of the radiation. We obtain an optimal lattice design by minimizing global and local momentum compaction factors simultaneously and the result of single-particle tracking shows that the electron beam with equilibrium rms bunch length of about 40 nm can be stored in this ring. Nonlinear dynamics is studied for this lattice. | ||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-SAP2023-MOPB039 | |
| About • | Received ※ 03 July 2023 — Revised ※ 08 July 2023 — Accepted ※ 11 July 2023 — Issued ※ 31 December 2023 | |
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TUCYA01 |
Development and application of ultrahigh vacuum S-band RF gun | |
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Funding: The work was partially supported by the National Key Research and Development Program of China No. 2022YFA1603400. Next generation of electron sources require higher electric field gradient and lower thermal emittance photocathodes. Recently, a series of high quantum efficiency, low thermal emittance and visible light driven advanced photocathodes have been developed, while they are sensitive to the vacuum condition. The previous studies on these advanced photocathodes are carried out at low gradient gun and the performances at the high gradient gun require comprehensive investigations. We developed an ultrahigh vacuum S-band RF gun to accommodate the vacuum sensitive photocathodes. The gun serves as a platform for high gradient studies on advanced photocathodes and is promising to advance the frontier of the electron beam brightness. This report will introduce the development of the ultrahigh vacuum S-band gun and the corresponding load lock system and advanced photocathode deposition system. |
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