Beam off-axis emission in direct current high voltage photocathode gun

Renjun, 杨仁俊 Yang; Kai, 李凯 Li; Dexin, 肖德鑫 Xiao; Jianxin, 王建新 Wang; Yu, 刘宇 Liu; Hanbin, 王汉斌 Wang; Dai, 吴岱 Wu; Xingfan, 杨兴繁 Yang

doi:10.3788/hplpb20152706.65101

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Gaas Photocathode1

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2021

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“…The vacuum and ion backbombardment are the principle factors affecting the lifetime. The effects and limitations of the beam off-axis emission to suppress the ion back bombardment is simulated at CAEP [65]. The simulation suggested that the ions mainly bombard the electrostatic center of the photocathode and 95% can be reduced if the electron is excited off-axis.…”

Section: Gaas Photocathodementioning

confidence: 99%

Overview of the Semiconductor Photocathode Research in China

Xie

2021

Micromachines

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With the growing demand from scientific projects such as the X-ray free electron laser (XFEL), ultrafast electron diffraction/microscopy (UED/UEM) and electron ion collider (EIC), the semiconductor photocathode, which is a key technique for a high brightness electron source, has been widely studied in China. Several fabrication systems have been designed and constructed in different institutes and the vacuum of most systems is in the low 10−8 Pa level to grow a high QE and long lifetime photocathode. The QE, dark lifetime/bunch lifetime, spectral response and QE map of photocathodes with different kinds of materials, such as bialkali (K2CsSb, K2NaSb, etc.), Cs2Te and GaAs, have been investigated. These photocathodes will be used to deliver electron beams in a high voltage DC gun, a normal conducting RF gun, and an SRF gun. The emission physics of the semiconductor photocathode and intrinsic emittance reduction are also studied.

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Section: Gaas Photocathodementioning

confidence: 99%

Overview of the Semiconductor Photocathode Research in China

Xie

2021

Micromachines

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Beam off-axis emission in direct current high voltage photocathode gun

Cited by 1 publication

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Overview of the Semiconductor Photocathode Research in China

Overview of the Semiconductor Photocathode Research in China

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