Carbon-Based Field Emitters: Properties and Applications

Егоров, Н. В.; Sheshin, E.P.

doi:10.1007/978-3-030-47291-7_10

Cited by 11 publications

(2 citation statements)

References 78 publications

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“…Однако по факту они не совпадают, что дает основание говорить об обратном, т. е. свидетельствовать об изменении условий на рабочей поверхности катода на фронте импульса, включая морфологию. Этот факт отражен в работе [13].…”

Section: результаты экспериментов и их обсуждениеunclassified

Характеристики Матричного Катода Из Карбида Кремния В Предпробойных И Пробойных Условиях

Морозов¹,

Егоров²,

Трофимов³

et al. 2023

Журнал Технической Физики

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This study assesses promising field electron sources based on silicon carbide monolithic field emission array (FEA). FEA is fabricated on single-crystal wafers of silicon carbide (0001C) 6H-SiC of n-type conductivity using the technology of two-stage reactive ion etching in SF6/O2/Ar atmosphere. To implement conditions close to breakdown, an experimental setup based on high-voltage narrow pulses generating device GKVI-300 was used. A series of nanosecond voltage pulses with amplitudes from 120 to 250 kV was generated. To study the characteristics of the FEA in the pre-breakdown state, the beam of field emitted electrons was separated from the ion torch or cathode plasma, formed in the following breakdown phases, by placing a 50-μm-thick titanium foil under zero potential into the interelectrode gap. Current-voltage characteristics of peak-currents vs. peak-voltages passing through the foil are close to rectilinear in the Fowler-Nordheim coordinates. The current-voltage characteristics plotted for each of the pulses along increasing and decreasing branches show a discrepancy (hysteresis). After the experiments, the silicon carbide cathode FEA was studied in a scanning electron microscope.

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