Mikhail Vladimirov, Vladimir Rashchikov, Sergey Polozov
{"title":"Features of electron bunch formation in radiofrequency photoguns","authors":"Mikhail Vladimirov, Vladimir Rashchikov, Sergey Polozov","doi":"10.1016/j.nima.2025.170443","DOIUrl":null,"url":null,"abstract":"<div><div>The paper investigates some aspects of bunch formation in a radiofrequency (RF) electron gun with a semiconductor photocathode. We numerically solve the drift–diffusion problems for excessive electron and hole concentrations inside the semiconductor medium influenced by picosecond laser pulses and an accelerated field of an RF cavity. Being a result of electron transport via drift and diffusion, the electron concentration at the photocathode surface made it possible to determine the photocurrent. We also demonstrate that the approach under consideration permit obtaining characteristic emission curves and determing quantum efficiency of the photocathode.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170443"},"PeriodicalIF":1.4000,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S016890022500244X","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/3/24 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
引用次数: 0
Abstract
The paper investigates some aspects of bunch formation in a radiofrequency (RF) electron gun with a semiconductor photocathode. We numerically solve the drift–diffusion problems for excessive electron and hole concentrations inside the semiconductor medium influenced by picosecond laser pulses and an accelerated field of an RF cavity. Being a result of electron transport via drift and diffusion, the electron concentration at the photocathode surface made it possible to determine the photocurrent. We also demonstrate that the approach under consideration permit obtaining characteristic emission curves and determing quantum efficiency of the photocathode.
期刊介绍：
Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section.
Theoretical as well as experimental papers are accepted.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
