Study of Cs-Te photocathode for rf electron gun

Shuri Matsuzaki, Mariko Nishida, Kazuyuki Sakaue, Masakazu Washio, Hokuto Iijima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

At Waseda University, we have been studying high quality electron beam with an rf electron gun. In recent accelerator study and application researches, high quality electron beam are strongly required. Photocathode is a key component to generate higher quality electron beam, thus we started to develop a Cs-Te photocathode as an electron source since 2007. Cs-Te photocathode shows high quantum efficiency (Q.E.) (∼10 %) and has long life time (∼several months). From 2013, we built a photocathode evaporation chamber and started photocathode study. In this study, our purpose is to clarify their property and to establish an ideal evaporation recipe. We succeeded in producing high quality Cs-Te photocathode, and electron beam generated by our Cs-Te photocathode shows high charge (4.6 nC/bunch) and high Q.E. (1.74 %) in our rf electron gun. Furthermore, we found a Q.E recovery after Cs deposition process and it causes higher Q.E. than usual due to, we believe, Cs deposition quantity or Cs deposition speed. Thus we are now surveying the optimum Cs evaporation parameters. In this conference, we will report a detail of our photocathode development system, the latest progress of optimization study of Cs-Te photocathode and future plans.

Original languageEnglish
Title of host publication6th International Particle Accelerator Conference, IPAC 2015
PublisherJoint Accelerator Conferences Website (JACoW)
Pages1632-1634
Number of pages3
ISBN (Electronic)9783954501687
Publication statusPublished - 2015
Event6th International Particle Accelerator Conference, IPAC 2015 - Richmond, United States
Duration: 2015 May 32015 May 8

Other

Other6th International Particle Accelerator Conference, IPAC 2015
CountryUnited States
CityRichmond
Period15/5/315/5/8

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Matsuzaki, S., Nishida, M., Sakaue, K., Washio, M., & Iijima, H. (2015). Study of Cs-Te photocathode for rf electron gun. In 6th International Particle Accelerator Conference, IPAC 2015 (pp. 1632-1634). Joint Accelerator Conferences Website (JACoW).