Computational models for investigation of channel amplifier’s optimal parameters

Shymanska, Alla; Babakov, V. A.

doi:10.1007/s10825-013-0494-3

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…Each path has two sequential stages: first collision and multiplication of a single electron until it leaves the channel. Thus, g(ξ ) and d(ξ ) for the second half of the channel can be determined as [14]:…”

Section: Multiplication Of a Single Electronmentioning

confidence: 99%

“…The portion of the channel from an elementary area at its input, where the collision occurred, to the output of the channel can be considered as the amplification path when the spread in incidence coordinates of the input electrons was taken into account [14].…”

Section: Spread In Incidence Coordinatesmentioning

confidence: 99%

“…In addition to the weak field effect for small angles θ there is a significant spread in the collision angles θ 0 of the input electrons with the surface (cos θ 0 = cos θ cos φ [14], where φ ∈ [−π/2; π/2] is the azimuthal angle in the cylindrical coordinate system). The spread in collision angles leads to the spread in σ (V, θ 0 ) (2) and, hence, to the spread in the gain and increase of the variance.…”

Section: Uniform High-efficiency Emittermentioning

confidence: 99%

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Effect of high-efficiency emitter on noise characteristics of electron amplifiers

Shymanska

2015

J Comput Electron

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Electron-optical devices with microchannel amplification have many advantages, except poor noise characteristics. In order to increase gain and reduce a noise factor a layer with increased secondary emission is deposited on the top of a contact conducting layer at the entrance of channels. Effects, arising in the channel amplifier with the high-efficiency emitter, are investigated in this work using the computational method, developed by the author. A computational method for simulation of stochastic processes of an electron multiplication is based on 3D Monte Carlo simulations and the theorems of serial and parallel amplification stages proposed by the author. The method provides a high calculation accuracy with minimal cost of computations. The computational model is used to investigate the effect on the noise factor of the incidence angle of the input electron beam, nonuniformity of the emitter surface, the depth and secondary emission yield of the high-efficiency emitter.Keywords Microchannel electron amplifier · Monte Carlo simulations · Nonuniformity of an emitter surface · High-efficiency emitter · Noise factor

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Section: Multiplication Of a Single Electronmentioning

confidence: 99%

Section: Spread In Incidence Coordinatesmentioning

confidence: 99%

Section: Uniform High-efficiency Emittermentioning

confidence: 99%

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Effect of high-efficiency emitter on noise characteristics of electron amplifiers

Shymanska

2015

J Comput Electron

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“…3) can be considered as the amplification path when the spread in incidence coordinates of the input electrons was taken into account [10]. In such case, the variance D and the average gain G at the output of the multiplier can be defined using (4) and (5), where the sums should be replaced by integrals over the surface of the channels, bombarded by the electrons of the primary beam:…”

Section: Computational Modelmentioning

confidence: 99%

Fast Monte Carlo Method in Stochastic Modelling of Charged Particle Multiplication

Shymanska¹,

Babakov²

2015

IJAPM

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Development of electronic devices, where the secondary electron emission is used to amplify input signals, requires simulation of complicated stochastic processes. The essence of the method proposed here consists of separating the amplification process into serial and parallel stages. The mean and variance of the amplitude distribution at the output of the entire system are obtained using the mean and variance of each stage. Theorems about serial amplification stages and parallel amplification paths constitute the key part of the method with partial Monte Carlo simulation for one simple stage. Here, the method is used to investigate the effect of the contact conducting layer on the gain and the noise factor of the channel amplifier. The case of image converters and intensifiers with an inverting electron-optical system and microchannel plate as an amplifier is taken for the consideration.

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Evaluation of a transfer function model using experimental data and numerical analysis: the case of a pyroelectric sensor

2016

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Computational models for investigation of channel amplifier’s optimal parameters

Cited by 3 publications

References 9 publications

Effect of high-efficiency emitter on noise characteristics of electron amplifiers

Effect of high-efficiency emitter on noise characteristics of electron amplifiers

Fast Monte Carlo Method in Stochastic Modelling of Charged Particle Multiplication

Evaluation of a transfer function model using experimental data and numerical analysis: the case of a pyroelectric sensor

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