A Compact Delayed Photocurrent Model Based on a Reduced Order Data-Driven Exponential Time Integrator
Publication: Earth and Space 2022
ABSTRACT
Analysis of radiation effects on electrical circuits requires computationally efficient compact radiation models. Currently, development of such models is dominated by analytic techniques that rely on empirical assumptions and physical approximations to render the governing equations solvable in closed form. In this paper we demonstrate an alternative numerical approach for the development of a compact delayed photocurrent model for a pn-junction device. Our approach combines a system identification step with a projection-based model order reduction step to obtain a small discrete time dynamical system describing the dynamics of the excess carriers in the device. Application of the model amounts to a few small matrix-vector multiplications having minimal computational cost. We demonstrate the model using a radiation pulse test for a synthetic pn-junction device.
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Earth and Space 2022
Pages: 556 - 570
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Published online: Jan 5, 2023
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