Publications Details

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

Adrian, P.J.; Frenje, J.; Aguirre, Brandon A.; Bachmann, B.; Birkel, A.; Johnson, M.G.; Kabadi, N.V.; Lahmann, B.; Li, C.K.; Mannion, O.M.; Martin, William J.; Mohamed, Z.L.; Regan, S.P.; Rinderknecht, H.G.; Scheiner, B.; Schmitt, M.J.; Seguin, F.H.; Shah, R.C.; Sio, H.; Sorce, C.; Sutcliffe, G.D.; Petrasso, R.D.

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.