Energy recovery linac based fully coherent light source

Zhao, Zhentang; Wang, Z.; Feng, Chao; Chen, Shaohua; Cao, Liqiang

doi:10.1038/s41598-021-03354-0

Cited by 9 publications

(10 citation statements)

References 33 publications

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“…25 For example, none of these known cathodes can provide such high QE to meet a high beam current as it is required for future energy recovery lines (ERL) applications. 26–28…”

Section: Introductionmentioning

confidence: 99%

“…25 For example, none of these known cathodes can provide such high QE to meet a high beam current as it is required for future energy recovery lines (ERL) applications. [26][27][28] The development of better photocathodes is progressing steadily and rapidly. Metal cathodes such as copper (Cu), magnesium (Mg) and lead (Pb) are used as the first cathodes when an accelerator facility is commissioned.…”

Section: Introductionmentioning

confidence: 99%

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Review of photocathodes for electron beam sources in particle accelerators

2023

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“…25 For example, none of these known cathodes can provide such high QE to meet a high beam current as it is required for future energy recovery lines (ERL) applications. 26–28…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review of photocathodes for electron beam sources in particle accelerators

2023

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“…The SSMB beam physics study (Deng et al, 2020a(Deng et al, ,b, 2021bZhang et al, 2021;Deng, 2022) and magnet lattice design (Pan et al, 2019) for the EUV SSMB storage ring are also ongoing, with encouraging progress being achieved. Other active SSMB-related research activities are also ongoing (Jiao et al, 2011;Chao et al, 2016;Khan, 2017;Li et al, 2019;Tsai et al, 2021;Tsai, 2022a,b;Zhao et al, 2021;Lu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Average and statistical properties of coherent radiation from steady-state microbunching

Deng¹,

Zhang²,

Pan³

et al. 2023

J Synchrotron Radiat

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A promising accelerator light source mechanism called steady-state microbunching (SSMB) is being actively studied. With the combination of strong coherent radiation from microbunching and high repetition rate of a storage ring, high-average-power narrow-band radiation can be anticipated from an SSMB storage ring, with wavelengths ranging from THz to soft X-ray. Such a novel light source could provide new opportunities for accelerator photon science like high-resolution angle-resolved photoemission spectroscopy and industrial applications like extreme ultraviolet (EUV) lithography. In this paper, a theoretical and numerical study of the average and statistical properties of coherent radiation from SSMB are presented. The results show that 1 kW average-power quasi-continuous-wave EUV radiation can be obtained from an SSMB ring provided that an average current of 1 A and a microbunch train with bunch length of 3 nm can be formed at the radiator which is assumed to be an undulator. Together with the narrow-band feature, the EUV photon flux can reach 6 × 1015 photons s−1 within a 0.1 meV energy bandwidth, which is three orders of magnitude higher than that in a conventional synchrotron source and is appealing for fundamental condensed matter physics and other research. In this theoretical investigation, we have generalized the definition and derivation of the transverse form factor of an electron beam which can quantify the impact of its transverse size on coherent radiation. In particular, it has been shown that the narrow-band feature of SSMB radiation is strongly correlated with the finite transverse electron beam size. Considering the pointlike nature of electrons and quantum nature of radiation, the coherent radiation fluctuates from microbunch to microbunch, or for a single microbunch from turn to turn. Some important results concerning the statistical properties of SSMB radiation are presented, with a brief discussion on its potential applications, for example the beam diagnostics. The presented work is of value for the development of SSMB to better serve potential synchrotron radiation users. In addition, this also sheds light on understanding the radiation characteristics of free-electron lasers, coherent harmonic generation, etc.

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“…Recently, a novel electron beam manipulation technique termed angular-dispersion-induced microbunching (ADM) (Li et al, 2020;Feng & Zhao, 2018) has been proposed, which utilizes small laser-induced energy modulation to directly imprint strong coherent microbunching onto electron beams, significantly reducing the requirement on laser power. Consequently, a new complex (Zhao et al, 2021) has been proposed to generate fully coherent radiation pulses with high repetition rates by implementing the ADM technique on the ERL. The combination of ADM and ERL can take full advantage of the GHz-level repetition rate, full coherence and high-flux with a sub-meV spectral resolution compared with the storage ring (Zhao, 2010) and the FEL (Madey, 1971;Emma et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…The combination of ADM and ERL can take full advantage of the GHz-level repetition rate, full coherence and high-flux with a sub-meV spectral resolution compared with the storage ring (Zhao, 2010) and the FEL (Madey, 1971;Emma et al, 2010). Three-dimensional (3D) start-to-end (S2E) simulations have been carried out with feasible parameters of the ERL and the results show that fully coherent radiation pulses can be achieved with an average brightness approximately five to six orders of magnitude higher than that of the diffraction-limited storage rings (Zhao et al, 2021;Eriksson et al, 2014;Einfeld et al, 2014), making the proposed scheme a potential candidate for the next generation of light sources.…”

Section: Introductionmentioning

confidence: 99%

Multiplexed emitting system for an energy-recovery-linac-based coherent light source

Cao,

Liu,

Wang

et al. 2023

J Synchrotron Radiat

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Recently, a novel approach has been proposed to produce ultrashort, fully coherent high-repetition-rate EUV and X-ray radiation by combining an energy recovery linac (ERL) with the angular-dispersion-induced microbunching methodology. It is critical to maintain microbunching when the beam passes through bending magnets between the undulators, which results in difficulties supporting multiple beamlines. In this paper, the design of a multiplexed emitting system consisting of multi-bend achromats, matching sections and radiators to facilitate the multi-beamline operation is presented. Theoretical analysis and numerical simulations have been carried out and the results show that the microbunching and beam quality can be well maintained after four times of bending. Five radiation pulses with a central wavelength of 13.5 nm and peak power at the MW level have been produced by the same electron beam via this multiplexed emitting system. The proposed method holds potential in the multi-beamline operation of ERL- or storage-ring-based coherent light sources.

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Energy recovery linac based fully coherent light source

Cited by 9 publications

References 33 publications

Review of photocathodes for electron beam sources in particle accelerators

Review of photocathodes for electron beam sources in particle accelerators

Average and statistical properties of coherent radiation from steady-state microbunching

Multiplexed emitting system for an energy-recovery-linac-based coherent light source

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