20 February 2017 Picosecond imaging of inertial confinement fusion plasmas using electron pulse-dilation
Author Affiliations +
Proceedings Volume 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics; 103280S (2017) https://doi.org/10.1117/12.2270483
Event: 31st International Congress on High-Speed Imaging and Photonics, 2016, Osaka, Japan
Abstract
Laser driven inertial confinement fusion (ICF) plasmas typically have burn durations on the order of 100 ps. Time resolved imaging of the x-ray self emission during the hot spot formation is an important diagnostic tool which gives information on implosion symmetry, transient features and stagnation time. Traditional x-ray gated imagers for ICF use microchannel plate detectors to obtain gate widths of 40-100 ps. The development of electron pulse-dilation imaging has enabled a 10X improvement in temporal resolution over legacy instruments. In this technique, the incoming x-ray image is converted to electrons at a photocathode. The electrons are accelerated with a time-varying potential that leads to temporal expansion as the electron signal transits the tube. This expanded signal is recorded with a gated detector and the effective temporal resolution of the composite system can be as low as several picoseconds. An instrument based on this principle, known as the Dilation X-ray Imager (DIXI) has been constructed and fielded at the National Ignition Facility. Design features and experimental results from DIXI will be presented.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. J. Hilsabeck, S. R. Nagel, J. D. Hares, J. D. Kilkenny, P. M. Bell, D. K. Bradley, A. K. L. Dymoke-Bradshaw, K. Piston, T. M. Chung, "Picosecond imaging of inertial confinement fusion plasmas using electron pulse-dilation", Proc. SPIE 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics, 103280S (20 February 2017); doi: 10.1117/12.2270483; https://doi.org/10.1117/12.2270483
PROCEEDINGS
6 PAGES


SHARE
Back to Top