Abstract
We report on absorption measurements in electron-beam pumped noble gases in the vicinity of 248 nm over a range of pressures and pump powers relevant to the KrF lasers which are being considered as potential drivers for inertial confinement fusion (IGF). The efficiency with which the deposited energy in large KrF lasers can be extracted by a saturating photon flux is strongly influenced by the ratio of gain to loss in the amplifier. Since several recent experiments1,2 have yielded an absorption which is as much as a factor of 2 higher than current KrF kinetics models predict, we have undertaken to measure the absorption in pure noble gases as a first step in improving our model. Investigating only a single noble gas, e.g., argon or krypton, affords a much simpler kinetics picture that allows for a more precise benchmark of the model than is usually obtained in laser experiments involving a gas mix of Ar, Kr, and F2.
© 1989 Optical Society of America
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