Electron–electron scattering in microcolumns

Thomson, M. G. R.

doi:10.1116/1.587458

Cited by 17 publications

(13 citation statements)

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“…The simulations allow the inclusion of electron tunneling and electron-electron interactions into the electron emission process. 12 The lines represent theoretical predictions of the energy width from a 0.3 m radius Schottky emitter at three values of tip temperature and angular current densities from 0.1 to 100 A/sr. Electric fields of 0.01 to 0.14 V/Å at 1800 K were applied to obtain the theoretical data.…”

Section: Resultsmentioning

confidence: 99%

“…2 It has a larger energy spread when compared to a cold field emitter at a given angular emission current density. 11,12 However, Schottky emitters have a much more stable emission current than the cold field emitters due to the lower electric fields and the larger and more stable emitting areas. 8,13,14 In this article, we present detailed experimental measurements of the energy distributions of the emitted electrons from Schottky emitters as functions of tip temperature and angular emission current density.…”

Section: Introductionmentioning

confidence: 99%

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Energy distributions of Zr/O/W Schottky electron emission

Kim¹,

Yu²,

Thomson³

et al. 1997

Journal of Applied Physics

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy distributions of Zr/O/W Schottky electron emission

Kim¹,

Yu²,

Thomson³

et al. 1997

Journal of Applied Physics

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“…It can reduce the device damage and it is possible to irradiate insulating devices without significant surface charging because of the considerably reduced electron penetration into the test samples. [7][8][9][10] The resolution of the miniaturized electron optical system is determined by various factors such as spherical aberration, astigmatism, and coma, and a prelens double deflector was proposed to avoid these excessive aberrations. [4][5][6] The scaled aberration coefficients of miniature columns are particularly suitable for generating higher-resolution beams of low-energy electrons, 2 and the electron optics of an electrostatic microcolumn have been studied intensively.…”

Section: Introductionmentioning

confidence: 99%

Optimization of electrostatic lens systems for low-energy scanning microcolumn applications

Kim

Ahn

et al. 2008

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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The optimization of a low-energy scanning microcolumn is proposed by adopting a modified Einzel lens sandwiched between an aligner and a deflector. The modified Einzel lens is composed of four electrodes, and the two center electrodes are specially designed quadrupole lenses having keyhole type rather than circular apertures. The outer electrodes of the Einzel lens having circular apertures are grounded, and the quadrupole lens is operated by applying the quadrupole voltages. The effects of the separated deflector system and the static quadrupole lens were investigated by analyzing the scanning electron beam spot at the target, and the results show that the proposed system can improve the performance of the scanning microcolumn.

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“…There are several reported results concerning ͑field emit-ted͒ electron focusing, either as a specific issue [2][3][4][5][6][7][8][9] or correlated with the FED application. 10,11 Generally speaking, these ͑experimental and theoretical͒ studies refer to Spindt-type 12 emitters provided with one or more supplementary electrodes, appearing either as an aperture ͑above the gate͒ or in the same plane with the gate and concentric with it.…”

Section: Introductionmentioning

confidence: 99%

Proposal for a new self-focusing configuration involving porous silicon for field emission flat panel displays

Nicolaescu

Filip

Okuyama

1997

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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Process design and emission properties of gated n + polycrystalline silicon field emitter arrays for flat-panel display applicationsField emission displays ͑FEDs͒ work in principle in a similar way with conventional cathode ray tubes ͑CRTs͒, namely emitted electrons excite phosphors which in turn emit visible light. However, FEDs obtain the electrons through field emission from a distributed network of sharp emitters, and there is no special deflection system for them. The size of the light spot associated with an island of emitters ͑a pixel͒ depends on many factors, such as display geometrical dimensions and operating conditions. In this article, a special self-focusing configuration for FEDs is analyzed using a combined analytical and numerical approach. The proposed configuration involves a distributed network of electron emitting areas which are concave in shape and not plane as usual, one for each phosphor pixel. The cathode concave areas are covered with a porous silicon layer, having sharp fibrils with several nanometers radius of curvature. The concave shape has a built-in electron self-focusing feature but, as a by-product, decreases the electric field compared to the plane cathode situation. However, the field multiplication approximation applies in this case, as concerns the electric field enhancement due to both the concave cathode and fibrils. It is shown that high enough electric fields are obtained, allowing electron field emission to occur. Analytical equations are provided for the electric field on the cathode concave surface. These equations are then used in a numerical model, taking into account the electric field enhancement associated with the fibrils, their mutual influence included. This approach allows the computation of the field emitted current as function of model parameters.

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Electron–electron scattering in microcolumns

Abstract: Electron-electron scattering in a double quantum dot: Effective mass approach

Cited by 17 publications

References 0 publications

Energy distributions of Zr/O/W Schottky electron emission

Energy distributions of Zr/O/W Schottky electron emission

Optimization of electrostatic lens systems for low-energy scanning microcolumn applications

Proposal for a new self-focusing configuration involving porous silicon for field emission flat panel displays

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