E
E. Shefer
Researcher at Weizmann Institute of Science
Publications - 23
Citations - 784
E. Shefer is an academic researcher from Weizmann Institute of Science. The author has contributed to research in topics: Photocathode & Electron. The author has an hindex of 16, co-authored 23 publications receiving 773 citations.
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Journal ArticleDOI
Electron field emission for ultrananocrystalline diamond films
Alan R. Krauss,Orlando Auciello,M. Q. Ding,Dieter M. Gruen,Y. Y. Huang,Victor V. Zhirnov,E.I. Givargizov,Amos Breskin,R. Chechen,E. Shefer,Vitali I. Konov,Sergej M. Pimenov,A.V. Karabutov,A. T. Rakhimov,Nikolay V. Suetin +14 more
TL;DR: In this paper, ultrananocrystalline diamond (UNCD) films 0.1-2.4 μm thick were conformally deposited on sharp single Si microtip emitters, using microwave CH4-Ar plasmaenhanced chemical vapor deposition in combination with a dielectrophoretic seeding process.
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Optical and photoemission studies of DLC films prepared with a systematic variation of the sp3:sp2 composition
Yeshayahu Lifshitz,G. Lempert,E. Grossman,H.-J. Scheibe,S. Voellmar,B. Schultrich,Amos Breskin,Rachel Chechik,E. Shefer,D. Bacon,Rafi Kalish,Alon Hoffman +11 more
TL;DR: In this article, the optical and photo-emission properties of hydrogen-free DLC films were reported under conditions which result in different types of carbon bonding (previously determined from electron energy loss spectroscopy) and the energy gaps were derived from Tauc plots (Eg) and from α = 104 cm−1 values (E04).
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Absolute quantum photoyield of diamond thin films: Dependence on surface preparation and stability under ambient conditions
A. Laikhtman,Alon Hoffman,Rafi Kalish,Y. Avigal,Amos Breskin,R. Chechik,E. Shefer,Yeshayahu Lifshitz +7 more
TL;DR: The dependence of the QPY on hydrogenation by exposure to a hydrogen microwave (MW) plasma and oxidation by a mixture of acids or on exposure to air under ambient conditions has been studied in this article.
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CsBr and CsI UV photocathodes: new results on quantum efficiency and aging
TL;DR: In this paper, the photoemission properties of 300 and 5000 CsBr photocathodes were investigated under high photon flux and ion bombardment in gas avalanche multiplication mode, without exposure to air.
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Study of CsI photocathodes: volume resistivity and ageing
TL;DR: In this paper, the ageing of CsI photocathodes under high photon flux, with one atmosphere CH4 and under a detector gain of 105, for several substrate materials.