Assessment and mitigation of diagnostic-generated electromagnetic interference at the National Ignition Facility

Abstract

(Presented XXXXX; received XXXXX; accepted XXXXX; published online XXXXX) Electromagnetic interference (EMI) is an ever-present challenge at laser facilities such as the National Ignition Facility (NIF). The major source of EMI at such facilities is laser-target interaction that can generate intense electromagnetic fields within, and outside of, the laser target chamber. In addition, the diagnostics themselves can be a source of EMI, even interfering with themselves. In this paper we describe EMI generated by ARIANE and DIXI, present measurements, and discuss effects of the diagnostic-generated EMI on ARIANE's CCD and on a PMT nearby DIXI. Finally we present some of the efforts we have made to mitigate the effects of diagnostic-generated EMI on NIF diagnostics.

Investigation into the electromagnetic impulses from long-pulse laser illuminating solid targets inside a laser facility

“…Tao The patterns of EMP transportation are possibly responsible for the coupled voltage output in this measurement, which mainly stem from the laser-target interaction and diagnostic-generated EMI [12], where some preliminary results of EMI induced by various diagnostic setups are evaluated. More tests needed to be elaborated and performed to confirm the specific origins of EMI since the testing environment is extremely complicated.…”

Strong electromagnetic pulses generated in high-intensity short-pulse laser interactions with thin foil targets

“…With the advent of petawatt lasers and MJ laser facilities the issue of EMP became of considerable practical interest, because such pulses strongly interfere with the electronics used to collect data and manipulate targets and hence pose a serious threat to safe and reliable execution of experiments. Therefore a dedicated effort was made to study the EMP effect at facilities such as Vulcan, Titan, Omega, NIF, LMJ and other (Mead et al, 2004;Raimbourg, 2004;Stoeckl et al, 2006;Remo et al, 2007;Brown et al, 2008;Bourgade et al, 2008;Eder et al, 2009;Brown et al, 2010;Eder et al, 2010;Chen et al, 2011;Bateman & Mead, 2012;Brown et al, 2012;Brown et al, 2013;). Pulses of 100's ns duration and electric fields of 100's kV/m strength were recorded.…”

Targets for high repetition rate laser facilities: needs, challenges and perspectives

“…The coupling of EMP radiation with electronic devices in the experimental room interferes with the correct operation of the devices, producing additional noise in detector readouts and disturbing motor operation. The electronic systems themselves can become an important source of EMP [145,146] . A number of dedicated studies have been devoted to EMP investigation, in order to minimize these collateral effects [145,146] .…”