Application of cross-beam energy transfer to control drive symmetry in CH, ICF implosions with a medium gas fill Hohlraum at the NIF*

We present a demonstration of stagnated core symmetry control using a 1 {\AA} wavelength difference between inner and outer drive beams at the National Ignition Facility. Application of a wavelength difference utilizes the process of Cross-Beam Energy Transfer to increase the x-ray drive incident on the waist of the ICF capsule, producing symmetry control in implosions with a plastic ablator. We show these findings over seven experiments by comparing the case of no wavelength difference, $\Delta \lambda =$0 {\AA}, to that of $\Delta \lambda \quad =$ 1{\AA}. We experimentally show implosion symmetry control of \textasciitilde 24 um in Legendre mode 2 (P2) symmetry, based on experimental playbooks this corresponds to a 25{\%} increase of inner beam drive at the waist of the hohlraum.