Commissioning the photoinjector of a gamma-ray light source

Chen, Han; Liu, Yan; Tian, Qingyong; Lin, Zuzhang; Wang, Dong; Cheng, Cheng; Shi, Jiaru; Zha, Hao; Du, Yingchao; Chen, Huaibi; Huang, Wenhui; Tang, Chuanxiang

doi:10.1103/physrevaccelbeams.22.053403

Cited by 9 publications

(2 citation statements)

References 30 publications

(30 reference statements)

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“…sensitive to the minimum transverse emittance. This is because the existence of a high-order field in the solenoid leads to non-linear focusing of the beam slice and then causes emittance growth [22]. Therefore, several gun solenoids with different longitudinal dimensions are designed to mitigate the spherical aberration of the gun solenoid.…”

Section: Beam Dynamics Simulationmentioning

confidence: 99%

Design of a kilohertz repetition rate, low-emittance S-band photoinjector

He,

Shan,

Wang

et al. 2024

Front. Phys.

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Low-emittance photoinjector-enabled cutting-edge scientific instruments, such as free-electron lasers, inverse Compton scattering light sources, and ultrafast electron diffraction, will greatly benefit from the improved repetition rate. In this paper, we proposed a specifically designed S-band radio frequency (RF) photoinjector to obtain low emittance and kilohertz (kHz) high-repetition rates simultaneously. By lowering the gradient, much lower RF power is needed to feed the electron gun, and then the heat problem is much easier to handle. Meanwhile, by optimizing the length of the gun’s first cell from the normal case of 0.6-cell to 0.4-cell, the launch phase and the extraction field are significantly improved, thus ensuring the generation of low-emittance electron beams. In our design, the proposed 1.4-cell RF gun can work effectively under different field gradients ranging from 30 MV/m to 100 MV/m. For a standard case of 60 MV/m, 2.5 MW peak RF power with μs level pulse width is sufficient, thus offering the feasibility of improving the repetition rate to kHz level with a standard 5 MW irradiation klystron. In addition, simulated electron beams with a low emittance of 0.29 mm.mrad@200 pC can be generated by this proposed photoinjector, showing that this high-repetition rate injector holds the potential to deliver high-quality beams comparable to those of state-of-the-art S-band photoinjectors. Combining the merits of low emittance and high-repetition rate, this proposed photoinjector will provide a new possibility for future free-electron laser facilities operating at repetition rates ranging from kHz to tens of kHz.

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Section: Beam Dynamics Simulationmentioning

confidence: 99%

Design of a kilohertz repetition rate, low-emittance S-band photoinjector

He,

Shan,

Wang

et al. 2024

Front. Phys.

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“…The Thomson-radiated extreme x-ray (T-REX) source at the Lawrence Livermore National Laboratory in the US demonstrated ICS in 2010 [274] with a future goal of delivering 8 MeV monoenergetic beams (bandwidth of ΔE/E = 0.1%) [271]. There are multi-MeV facilities based on linacs under development [275][276][277], offering extremely high photon flux up to 10 13 photons per second [271].…”

Section: Inverse Compton Scatteringmentioning

confidence: 99%

Review of high energy x-ray computed tomography for non-destructive dimensional metrology of large metallic advanced manufactured components

et al. 2022

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Advanced manufacturing technologies, led by additive manufacturing, have undergone significant growth in recent years. These technologies enable engineers to design parts with reduced weight while maintaining structural and functional integrity. In particular, metal additive manufacturing parts are increasingly used in application areas such as aerospace, where a failure of a mission-critical part can have dire safety consequences. Therefore, the quality of these components is extremely important. A critical aspect of quality control is dimensional evaluation, where measurements provide quantitative results that are traceable to the standard unit of length, the metre. Dimensional measurements allow designers, manufacturers and users to check product conformity against engineering drawings and enable the same quality standard to be used across the supply chain nationally and internationally. However, there is a lack of development of measurement techniques that provide non-destructive dimensional measurements beyond common non-destructive evaluation focused on defect detection. X-ray computed tomography (XCT) technology has great potential to be used as a non-destructive dimensional evaluation technology. However, technology development is behind the demand and growth for advanced manufactured parts. Both the size and the value of advanced manufactured parts have grown significantly in recent years, leading to new requirements of dimensional measurement technologies. This paper is a cross-disciplinary review of state-of-the-art non-destructive dimensional measuring techniques relevant to advanced manufacturing of metallic parts at larger length scales, especially the use of high energy XCT with source energy of greater than 400 kV to address the need in measuring large advanced manufactured parts. Technologies considered as potential high energy x-ray generators include both conventional x-ray tubes, linear accelerators, and alternative technologies such as inverse Compton scattering sources, synchrotron sources and laser-driven plasma sources. Their technology advances and challenges are elaborated on. The paper also outlines the development of XCT for dimensional metrology and future needs.

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Overview on Inverse Compton X-ray Sources

Günther

2023

Springer Theses

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Commissioning the photoinjector of a gamma-ray light source

Cited by 9 publications

References 30 publications

Design of a kilohertz repetition rate, low-emittance S-band photoinjector

Design of a kilohertz repetition rate, low-emittance S-band photoinjector

Review of high energy x-ray computed tomography for non-destructive dimensional metrology of large metallic advanced manufactured components

Overview on Inverse Compton X-ray Sources

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