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Electron gun with a transmission photocathode for the Joint Institute for Nuclear Research photoinjector

 a,  a,  a,  a,  b,  b,  b,  c
a Joint Institute for Nuclear Research, Dubna, Moscow Region, Russian Federation
b Federal Research Center Institute of Applied Physics of the Russian Academy of Sciences, ul. Ulyanova 46, Nizhny Novgorod, 603000, Russian Federation
c Institute of Electrical Engineering, Dúbravská cesta 9, Bratislava, 84104, Slovak Republic

Photocathode electron guns are key to the generation of high-quality electron bunches which are currently the primary source of electrons for linear electron accelerators. The photogun test bench built at the Joint Institute for Nuclear Research (JINR) is currently being used to further develop the hollow (backside irradiated) photocathode concept. A major result was the replacement of the hollow photocathode by a technologically more feasible transmission photocathode made from a metal mesh which serves as a substrate for films of various photomaterials. A number of thin-film cathodes on quartz glass substrates are fabricated by photolithography. Vectorial photoeffect (related to the surface-normal component of the wave electric field) is observed and found to significantly affect the quantum yield. The dependence of the quantum yield of diamond-like carbon photocathodes on the manufacturing technology is investigated. The Rutherford backscattering and elastic recoil detection techniques are combined to carry out the elemental analysis of the films. An estimate of the emittance of a 400 pC electron beam is obtained using the cross-section method.

Text can be downloaded in Russian. English translation is available here.
Keywords: DC photoinjector, transmissive photocathode, vectorial photoeffect
PACS: 29.25.Bx, 79.60.−i (all)
DOI: 10.3367/UFNe.2017.03.038145
URL: https://ufn.ru/en/articles/2017/10/h/
Citation: Balalykin N I, Minashkin V F, Nozdrin M A, Shirkov G D, Zelenogorskii V V, Gacheva E I, Poteomkin A K, Huran J "Electron gun with a transmission photocathode for the Joint Institute for Nuclear Research photoinjector" Phys. Usp. 60 1051–1058 (2017)
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Received: 30th, March 2017, 1st, March 2017

Оригинал: Балалыкин Н И, Минашкин В Ф, Ноздрин М А, Ширков Г Д, Зеленогорский В В, Гачева Е И, Потемкин А К, Гуран Й «Электронная пушка с прозрачным фотокатодом для фотоинжектора Объединённого института ядерных исследований» УФН 187 1134–1141 (2017); DOI: 10.3367/UFNr.2017.03.038145

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