An x-ray penumbral imager for measurements of electron–temperature profiles in inertial confinement fusion implosions at OMEGA

• Published in: Review of scientific instruments Vol. 92; no. 4
• Main Authors: Adrian, P. J., Frenje, J., Aguirre, B., Bachmann, B., Birkel, A., Johnson, M. Gatu, Kabadi, N. V., Lahmann, B., Li, C. K., Mannion, O. M., Martin, W., Mohamed, Z. L., Regan, S. P., Rinderknecht, H. G., Scheiner, B., Schmitt, M. J., Séguin, F. H., Shah, R. C., Sio, H., Sorce, C., Sutcliffe, G. D., Petrasso, R. D.
• Format: Journal Article
• Language: English
• Published: 01.04.2021
• ISSN: 0034-6748; 1089-7623
• DOI: 10.1063/5.0041038

Hot-spot shape and electron temperature (Te) are key performance metrics used to assess the efficiency of converting shell kinetic energy into hot-spot thermal energy in inertial confinement fusion implosions. X-ray penumbral imaging offers a means to diagnose hot-spot shape and Te, where the latter can be used as a surrogate measure of the ion temperature (Ti) in sufficiently equilibrated hot spots. We have implemented a new x-ray penumbral imager on OMEGA. We demonstrate minimal line-of-sight variations in the inferred Te for a set of implosions. Furthermore, we demonstrate spatially resolved Te measurements with an average uncertainty of 10% with 6 μm spatial resolution.