Present status of CAEP THz FEL facility

Dou, Yuhuan; Shu, Xiaojian; Yang, Xingfan; Li, Ming; Derong, Deng; Wang, Hanbin; Lu, Xiangyang; Xu, Zuyan

doi:10.1109/irmmw-thz.2015.7327884

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…NovoFEL consists of a series of 180 MHz normal conducting RF cavities and an energy recovery system operating in the cw mode that can generate an average power of 400 W and a micropulse energy of 50 µJ. Various new projects [12][13][14] or studies involving THz FELs have been proposed [15,16].…”

Section: Introductionmentioning

confidence: 99%

Synchronised TeraHertz Radiation and Soft X-rays Produced in a FEL Oscillator

et al. 2022

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We present a scheme to generate synchronised THz and soft X-ray radiation pulses by using a free-electron laser oscillator driven by a high repetition rate (of order 10–100 MHz) energy recovery linac. The backward THz radiation in the oscillator cavity interacts with a successive electron bunch, thus producing few 105 soft/hard X-ray photons per shot (namely 1012–1013 photons/s) via Thomson/Compton back-scattering, synchronised with the mJ-class THz pulse within the temporal jitter of electron beams accelerated in the superconducting cavities of the linac (less than 100 fs). Detailed simulations have been performed in order to assess the capability of the scheme for typical wavelengths of interest, between 10 and 50 μm for the TeraHertz radiation and 0.5–3 nm for the X-rays.

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Section: Introductionmentioning

confidence: 99%

Synchronised TeraHertz Radiation and Soft X-rays Produced in a FEL Oscillator

et al. 2022

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“…Some of the advantages of the FEL oscillator mode with respect to other FEL configurations, like single-pass FELs operating in Self-Amplified Spontaneous Emission (SASE), seeded, or superradiant modes, are its compactness, the relaxed requirements for the electron bunch quality, and the fact that oscillators are suitable for super-conducting linacs enabling the generation of powerful quasi-CW light. Few devices exploiting this scheme operate worldwide [4][5][6] or have been proposed [7,8]. Similar to the multi-pass FEL oscillator configuration is the storage-ring FEL oscillator [9], where the electron beam circulating in the storage ring participates in the FEL interaction during each pass through a FEL undulator.…”

Section: Introductionmentioning

confidence: 99%

Two-Color TeraHertz Radiation by a Multi-Pass FEL Oscillator

Opromolla

Petrillo

2021

Applied Sciences

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In this paper, we show that an electron beam produced by a super-conducting linac, driven in a sequence of two undulator modules of different periods, can generate two-color Terahertz radiation with wavelengths ranging from 100 μm to 2 μm. The generated pulses are synchronized, both MW-class, and highly coherent. Their specific properties and generation will be discussed in detail. Besides the single-spike pulse structure, usually observed in oscillators, we show that both the THz pump and probe can be modulated in a coherent comb of pulses, enabling periodic excitation and stroboscopic measurements.

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