Analyze and Simulation of a Typical MEMS RPG Using MCNP Code

Mohamadian, Masoumeh; Feghhi, S.A.H.; Afarideh, H.

doi:10.1115/icone16-48766

Cited by 4 publications

(1 citation statement)

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“…In this research, we adopted MCNP to simulate the transport processes of β particles in semiconductor materials and to calculate the nuclear radiation–generated current I R . Theoretically, I R can be derived as [ 18 , 19 , 20 ]:

where H is the thickness of the semiconductor, CE ( x ) is the collection probability of electron-hole pairs, q is the electron charge, E ( x ) is the energy deposition, E ( n ) is the energy deposition of the Nth layer semiconductor calculated by MCNP, and k is the number of total layers in the semiconductor during MCNP calculation; x n is the distance of the N th layer from the depletion region, L is the minority carrier diffusion length, and tan h is the hyperbolic tangent function.…”

Section: Structure and Modelsmentioning

confidence: 99%

Optimization Design and Simulation of a Multi-Source Energy Harvester Based on Solar and Radioisotope Energy Sources

Zhang

You

2016

Micromachines

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A novel multi-source energy harvester based on solar and radioisotope energy sources is designed and simulated in this work. We established the calculation formulas for the short-circuit current and open-circuit voltage, and then studied and analyzed the optimization thickness of the semiconductor, doping concentration, and junction depth with simulation of the transport process of β particles in a semiconductor material using the Monte Carlo simulation program MCNP (version 5, Radiation Safety Information Computational Center, Oak Ridge, TN, USA). In order to improve the efficiency of converting solar light energy into electric power, we adopted PC1D (version 5.9, University of New South Wales, Sydney, Australia) to optimize the parameters, and selected the best parameters for converting both the radioisotope energy and solar energy into electricity. The results concluded that the best parameters for the multi-source energy harvester are as follows: Na is 1 × 1019 cm−3, Nd is 3.8 × 1016 cm−3, a PN junction depth of 0.5 μm (using the 147Pm radioisotope source), and so on. Under these parameters, the proposed harvester can achieve a conversion efficiency of 5.05% for the 147Pm radioisotope source (with the activity of 9.25 × 108 Bq) and 20.8% for solar light radiation (AM1.5). Such a design and parameters are valuable for some unique micro-power fields, such as applications in space, isolated terrestrial applications, and smart dust in battlefields.

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