A study of space charge induced non-linearity in the Single Line Of Sight camera

Trosseille, C.; Durand, C. E.; Hurd, E. R.; Dayton, M. S.; Engelhorn, K.; Hall, G. N.; Holder, J. P.; Landen, O. L.; Carpenter, A. C.; Nagel, S. R.

doi:10.1063/5.0071957

Title: A study of space charge induced non-linearity in the Single Line Of Sight camera

Journal Article · 07 February 2022 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/5.0071957 · OSTI ID:1860671

^[1]; Durand, C. E. ^[1]; Hurd, E. R. ^[1]; Dayton, M. S. ^[1]; Engelhorn, K. ^[2];

^[1];

^[1]; Carpenter, A. C. ^[1];

^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
General Atomics, San Diego, CA (United States)

We report a new generation of gated x-ray detectors at the National Ignition Facility has brought faster, enhanced imaging capabilities. Their performance is currently limited by the amount of signal they can be operated with before space charge effects in their electron tube start to compromise their temporal and spatial response. We present a technique to characterize this phenomenon and apply it to a prototype of such systems, the Single Line Of Sight camera. Results of this characterization are used to benchmark Particle In Cell simulations of the electrons drifting inside the detector, which are found to well reproduce experimental data. These simulations are then employed to predict the optimum photon flux to the camera, with the goal to increase the quality of the images obtained on an experimental campaign while preventing the appearance of deleterious effects. They also offer some insight into some of the improvements that can be brought to the new pulse-dilation systems being built at Lawrence Livermore National Laboratory

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1860671

Report Number(s):: LLNL-JRNL-826681; 1040477

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 93; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: A study of space charge induced non-linearity in the Single Line Of Sight camera

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