The MING proposal at SHINE: megahertz cavity enhanced X-ray generation

Huang, Nanshun; Liu, Zi-Peng; Deng, Bangjie; Zhu, Zihan; Li, Shaohua; Liu, Tao; Zheng, Qiwen; Yan, Jiawei; Zhang, Wei; Xiang, Sheng-Wang; Lei, Yixiong; Zhu, Y.; He, Yuan; Yuan, Qi-Bing; Gao, Fei; Deng, Rong-Bing; Sun, Sen; Lei, Zhi-Di; Jiang, Zhiqiang; Duan, Meng‐Qi; Zhuan, Yuan; Huang, Xue-Fang; Dong, Ping; Li, Zhongliang; Si, Shangyu; Li, Xue; Chen, Si; Liu, Yongfang; Tong, Yali; Deng, Haixiao; Zhao, Zhentang

doi:10.1007/s41365-022-01151-6

Cited by 21 publications

(10 citation statements)

References 129 publications

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“…Several facilities have been built in the world such as Eu-XFEL [2,3] and LCLS-II [4]. The Shanghai High Repetition rate XFEL and Extreme light facility (SHINE) [5][6][7] is an x-ray FEL facility based on an 8 GeV continuous-wave superconducting RF linac, 3 undulator lines, 3 X-ray beamlines and 10 experimental stations, which has started its construction from april of 2018. It currently under construction at Zhangjiang Hi-Tech Park, close to the Shanghai Synchrotron Radiation Facility(SSRF) [8] and the Shanghai soft X-ray free-electron laser(SXFEL) [9], aims to deliver FEL pulses between 0.4 keV and 25 keV with repetition rate up to 1 MHz, which enable research in various fields, including biology, chemistry, and material science.…”

Section: Introductionmentioning

confidence: 99%

Coupler RF kick and emittance optimization of the SHINE injector

Guo,

Gu,

Jiang

et al. 2024

J. Inst.

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Coupler RF kick due to the asymmetric structure caused by the coupler, is more likely to lead to emittance growth in the SHINE injector with low beam energy. The calculation of coupler RF kick and resulting emittance dilution has been studied in detail in the literature. In this paper, a novel approach is provided that a lossy material is placed on the surface of the superconducting cavity to approximate the Q 0 of the TESLA cavity, and a frequency solver of CST is used to simulate the electromagnetic field distribution, which is used to calculate coupler RF kick, and calibrated against the results of CST Particle Tracking Studio with a good agreement. In order to minimize the emittance growth of SHINE injector, a 1.3 GHz symmetric twin-coupler cavity is adoped in the single-cavity cryomodule, and the rotational angle and permutation of the 8 cavities in the 8-cavities cryomodule is optimized. Ultimately, the optimized emittance is lower than the design parameter.

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Section: Introductionmentioning

confidence: 99%

Coupler RF kick and emittance optimization of the SHINE injector

Guo,

Gu,

Jiang

et al. 2024

J. Inst.

Self Cite

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“…The hard X-ray free-electron lasers (XFEL) and the high-energy photon sources (HEPS) stand at the fourth generation advanced X-ray light sources. These cutting-edge facilities provide exceptional experimental capabilities and open up significant opportunities for detecting structures of matter [1][2][3][4]. These technologies enable ultrafast dynamic analysis of molecular or atomic level matter structures, which plays a crucial role in advancing materials science [5,6].…”

Section: Introductionmentioning

confidence: 99%

Ultra-large scale array silicon pixel sensors with uniform and low leakage current for advanced X-ray light sources

Sun,

Lu,

et al. 2024

J. Inst.

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The development of silicon pixel sensors (SPS) with high operating voltage, low leakage currents, and large arrays can contribute to improving the energy and spatial resolution of advanced X-ray light source detection systems. The Future Detection System comprises a hybrid-pixel detector with a collective resolution of 2048 × 2048 pixels, each measuring 100 μm× 100 μm. It consists of 16 p-i-n SPSs, where each sensor has an array size of 1024× 256 pixels. In this paper, the design of the pixel and guard rings is optimized to achieve uniform and ultra-low pixels leakage currents under high operating voltage. The high leakage current uniformity of the designed sensor is demonstrated through several tests conducted on small scale array SPS. The leakage current of the tested pixels is in the range of 0.50–0.55 pA at room temperature with less than 5% leakage deviation on the whole array. It is accompanied by breakdown voltages greater than 1000 V. The optimized 256× 128 pixel SPS showcases uniform leakage currents below 0.6 pA per pixel at room temperature, as evidence in both the edge and central pixels. The 1024× 256 pixels SPS is then manufactured based on the optimized design results. The obtained results show that the breakdown voltage is greater than 1000 V and the leakage current of the pixel is less than 2.5 pA. In addition, the interpixel capacitance of the sensor also reach an ultra-low level of 16 fF. This study paves the way for the development of a robust semiconductor device solution for applications where ultra-fast and large panel-pixel detectors in advanced X-ray light source detection systems are required.

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“…[19][20][21][22][23][24][25] In recent years, the high-repetition-rate operation of XFEL has been proposed to obtain pulses with high average brightness, which has enormous potential in a variety of scientific studies. 3,7,[26][27][28] Based on superconducting accelerators, FLASH 29 and the European XFEL 7 can reach repetition rates of 1 and 4.5 MHz in a burst mode, respectively. Moreover, SHINE 27,28 and LCLS-II 26 are designed to achieve 1 MHz in a continuous-wave mode.…”

Section: Introductionmentioning

confidence: 99%

“…3,7,[26][27][28] Based on superconducting accelerators, FLASH 29 and the European XFEL 7 can reach repetition rates of 1 and 4.5 MHz in a burst mode, respectively. Moreover, SHINE 27,28 and LCLS-II 26 are designed to achieve 1 MHz in a continuous-wave mode. A seeded FEL with a repetition rate of 1 MHz can meet the requirements of specific experiments, such as highresolution spectroscopy techniques.…”

Section: Introductionmentioning

confidence: 99%

High-repetition-rate seeded free-electron laser enhanced by self-modulation

2023

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The spectroscopic methods for the ultrafast electronic and structural dynamics of materials require fully coherent extreme ultraviolet and soft X-ray radiation with high-average brightness. Seeded free-electron lasers (FELs) are ideal sources for delivering fully coherent soft X-ray pulses. However, due to state-of-theart laser system limitations, it is challenging to meet the ultraviolet seed laser's requirements of sufficient energy modulation and high repetition rates simultaneously. The self-modulation scheme has been proposed and recently demonstrated in a seeded FEL to relax the seed laser requirements. Using numerical simulations, we show that the required seed laser intensity in the self-modulation is ~3 orders of magnitude lower than that in the standard high-gain harmonic generation (HGHG). The harmonic self-modulation can launch a singlestage HGHG FEL lasing at the 30th harmonic of the seed laser. Moreover, the proof-of-principle experimental results confirm that the harmonic self-modulation can still amplify the laser-induced energy modulation. These achievements reveal that the self-modulation can not only remarkably reduce the requirements of the seed laser but also improve the harmonic upconversion efficiency, which paves the way for realizing high-repetitionrate and fully coherent soft X-ray FELs.

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The MING proposal at SHINE: megahertz cavity enhanced X-ray generation

Cited by 21 publications

References 129 publications

Coupler RF kick and emittance optimization of the SHINE injector

Coupler RF kick and emittance optimization of the SHINE injector

Ultra-large scale array silicon pixel sensors with uniform and low leakage current for advanced X-ray light sources

High-repetition-rate seeded free-electron laser enhanced by self-modulation

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