This paper proposes a method for designing EMC shielding enclosures using a peer-to-peer based distributed optimisation system based on a modified particle swarm optimisation (PSO) algorithm. This optimisation system is used to efficiently obtain optimal solutions to a shielding enclosure design problem by sampling only a small fraction of the total problem space. Such a system would find use i...

This study introduced a method for enhancing the shielding effectiveness of an enclosure with apertures using absorber. The absorber was installed on inner surface aperture and attenuated incident electromagnetic waves as they passed through it. Furthermore, reduced standing generated inside owing to cavity effect, improving effectiveness. A 3D numerical analysis confirmed that proposed structu...

This document summarizes recent efforts to characterize the emissions from LWDA electronics still in development. Near final versions of the ARL-developed variable gain stage (otherwise known as the second gain stage or SGS) and digital receiver (RX) have been completed, fabricated and tested recently; a near final version of the adder board is expected in the next few weeks. Individual enclosu...

In this paper, an extremely fast technique is introduced to evaluate the shielding effectiveness of a rectangular enclosure of finite wall thickness and numerous square or circular small apertures subject to a normally incident plane wave. The technique is based on the traditional waveguide circuit model where the enclosure is replaced with an equivalent shorted transmission line. In the propos...

In this study, electric field Shielding Effectiveness (SE) of rectangular enclosure with apertures illuminated by vertical polarization plane wave has been studied by using modal method of moment technique. Electric field SE of enclosure with different shape apertures but same area has been c alculated at three different points inside enclosure. To achieve this, assuming appropriate electric fi...

The shielding effectiveness (SE) measurements on enclosures with various apertures by both reverberation chamber (RC) and GTEM cell (GC) methodologies are presented. Furthermore, computer simulation through commercial software (CST) is used to compare with the experimental data. Our results show that the SE of the rectangular enclosure with five different apertures from RC is usually larger tha...

The Front End Enclosure (FEE) of the Linac Coherent Light Source (LCLS) is a shielding housing located between the electron dump area and the first experimental hutch. The upstream part of the FEE hosts the commissioning diagnostics for the FEL beam. In the downstream part of the FEE, two sets of grazing incidence mirror and several collimators are used to direct the beam to one of the experime...