Electron flow enhancement with a diamond membrane

Гаврилов, С. А.; Dzbanovsky, N.N.; Il’ichev, É. A.; Minakov, P. V.; Poltoratsky, E. A.; Rychkov, G. S.; Suetin, N. V.

doi:10.1134/1.1642688

Cited by 8 publications

(7 citation statements)

References 7 publications

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“…Similar mechanisms have been considered earlier in . Estimations show that with the diffusion length of electron losses in the high‐quality diamond film is L e ∼ 0.1–0.2 µm , in the field E c , the energy gained by the electrons is E e = E c L e = 35–70 eV. These accelerated electrons can produce secondary electrons with SEE coefficient δ ∼ E e /2.5 E g = 2.5–5, which is determined by the energy gap of diamond, E g = 5.5 eV, .…”

Section: Study Of the Cathode Emissivity And Discussion Of The Experimentioning

confidence: 54%

Electron emission amplification of cold cathode by two-layer diamond coating

Иванов

Горбачев

Vikharev

et al. 2015

Phys. Status Solidi A

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The results of experimental investigations of electron emission of molybdenum cathodes with two-layer diamond films are presented. For two-layer coating, the first layer of the two was a high-conductivity nanocrystalline diamond film heavily doped with nitrogen, and the second layer was a thin microcrystalline high-quality diamond film. The emission characteristics of the cathodes were determined on the basis on analyzing the output parameters of a high-power rf pulse compressor, in which these cathodes were used in the high-current (>100 A) regime. In the experiment, the current increasing for the cathode with twolayer coating in comparison with cathodes without and with one layer was observed. This effect of the current increasing can be explained by amplification of the electron beam in the process of the secondary electron emission as the beam passes through the second diamond film.

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Section: Study Of the Cathode Emissivity And Discussion Of The Experimentioning

confidence: 54%

Electron emission amplification of cold cathode by two-layer diamond coating

Иванов

Горбачев

Vikharev

et al. 2015

Phys. Status Solidi A

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“…Normally, insulators have relatively high (greater than 2) coefficients of sec ondary emission. This is due to the fact that insulators exhibit relatively low affinity energies (potential barri ers for the emission of secondary electrons) and rela tively large free path lengths of electrons in the con duction band owing to large band gaps [7][8][9]. It is demonstrated in [7][8][9] that the coefficient of second ary emission amounts to 100 under the condition for the negative affinity (zero potential barrier at the sur face-vacuum interface).…”

Section: Resultsmentioning

confidence: 98%

“…This is due to the fact that insulators exhibit relatively low affinity energies (potential barri ers for the emission of secondary electrons) and rela tively large free path lengths of electrons in the con duction band owing to large band gaps [7][8][9]. It is demonstrated in [7][8][9] that the coefficient of second ary emission amounts to 100 under the condition for the negative affinity (zero potential barrier at the sur face-vacuum interface). At the field strength from [7], the exponential dependence is not observed (as in the case under study), so that the work function of second ary electrons is related only to an increase in the con ductivity inside the diamond structure.…”

Section: Resultsmentioning

confidence: 98%

Secondary-emission properties of the 2D-ordered linear chain carbon films

Streletskii

Khvostov

Novikov

et al. 2012

J. Commun. Technol. Electron.

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The secondary emission of thin films of the 2D ordered linear chain carbon (LCC) with a thick ness of 100 nm are studied using transmission measurements at various energies of primary electrons. It is demonstrated that the coefficient of secondary emission of the LCC films substantially depends on the extraction field strength on the opposite side of the film and reaches a maximum value of 56 at a field strength of about 2 kV/cm.

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“…1−3 At the same time, diamond is used in numerous industrial fields. As a consequence, various diamond structuring strategies have been developed to fit specific requirements, 4−6 e.g., large surface areas, geometrically ordered microstripes or meshes, 7 nano-objects or nanostructures (wires, rods, and whiskers), 8,9 porous films and membranes, 10,11 etc.…”

Section: Introductionmentioning

confidence: 99%

“…27,30,32 In the course of the development and usage of these supports, various aspects of procedures that can be used and specific applications have already been discussed. For example, diamond nanoparticles in a polymer matrix can be used for fabricating porous diamond structures, 7,19 for enhancing the seeding efficiency in planar diamond deposition and for diamond growth on vertical structures. 20,33,34 In the case of diamond deposition on graphitelike materials, the proper seeding technology and the chemical stability of these materials has a direct effect on the final geometry of the structure that is formed.…”

Section: Introductionmentioning

confidence: 99%

Great Variety of Man-Made Porous Diamond Structures: Pulsed Microwave Cold Plasma System with a Linear Antenna Arrangement

et al. 2019

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Synthetic diamond films are routinely grown using chemical vapor deposition (CVD) techniques. Due to their extraordinary combination of intrinsic properties, they are used as the functional layers in various bio-optoelectronic devices. It is a challenge to grow the dimensional layers or porous structures that are required. This study reviews the fabrication of various porous diamond-based structures using linear antenna microwave plasma (LAMWP) chemical vapor deposition (CVD), a low-cost technology for growing diamond films over a large area (>1 m 2 ) at low pressure (<100 Pa) and at low temperature (even at 350 °C). From a technological point of view, two different approaches, i.e., templated diamond growth using three different prestructured (macro-, micro-, and nanosized) porous substrates and direct bottom-up growth of ultra-nanoporous diamond (block-stone and dendritelike) films, are successfully employed to form diamond-based structures with controlled porosity and an enhanced surface area. As a bottom-up strategy, the LAMWP CVD system allows diamond growth at as high as 80% CO 2 in the CH 4 /CO 2 /H 2 gas mixture. In summary, the low-pressure and cold plasma conditions in the LAMWP system facilitate the growth on three-dimensionally prestructured substrates of various materials that naturally form porous self-standing diamond structures.

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Electron flow enhancement with a diamond membrane

Cited by 8 publications

References 7 publications

Electron emission amplification of cold cathode by two-layer diamond coating

Electron emission amplification of cold cathode by two-layer diamond coating

Secondary-emission properties of the 2D-ordered linear chain carbon films

Great Variety of Man-Made Porous Diamond Structures: Pulsed Microwave Cold Plasma System with a Linear Antenna Arrangement

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