High Z x-ray spectroscopy of laser-imploded capsules

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Abstract
X‐ray spectroscopy is a valuable tool for diagnosing laser‐imploded capsules. Using a compact spectrometer/streak camera, which fits down a 6‐in.‐diam tube, we routinely perform time‐resolved measurements of deuterium‐filled capsules, seeded with Ar, on implosions driven by the NOVA laser. Future high performance targets will preclude the use of Ar as a diagnostic; we are pursuing spectral diagnostics at higher proton energy (Ne‐like Xe) and have performed a series of direct drive implosions of capsules filled with Xe, and with Kr, to help validate line broadening models for Ne‐like ions. We will discuss the details of the instrument and these experiments.