Mallinson, DerekMorrow, Ivor L.2019-04-082019-04-082018-10-25Mallinson D & Morrow I (2018) Implementation of HEMP waveforms for time-domain modeling. In: 2018 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO), Reykjavik, Iceland, 8-10 August 2018.978-1-5386-5205-3http://doi.org/10.1109/NEMO.2018.8503130http://dspace.lib.cranfield.ac.uk/handle/1826/14052This paper presents recent advances in the development of HEMP waveforms with causal responses suitable for implementation in Finite Difference Time Domain models. New time-domain implementations of the HEMP environment are proposed using direct and indirect employment of the HEMP waveform. Numerical instabilities of the waveform are addressed and a new stable waveform matched to the IEC standard has been evaluated. It is concluded that the implementation of the quotient exponential model provides a stable and accurate waveform for time-domain modelling.enAttribution-NonCommercial 4.0 InternationalDouble ExponentialDEXPFDTDElectromagnetic PulseQEXPHEMPTime DomainQuotient ExponentialConference paper