Measurements of down-scattered and TT-neutron spectra using the Magnetic Recoil Spectrometer (MRS) on OMEGA

The down-scattered and TT-neutron spectra from an ICF implosion have been measured for the first time using the Magnetic Recoil Spectrometer (MRS) at OMEGA. From the measurements of the down-scattered neutron spectrum, an areal density was inferred for both CH and low-adiabat cryogenic DT implosions. From the TT-neutron measurements, the astrophysical S-factor (``cross section'') and the branching ratio for the different TT-reaction channels were determined at energies inaccessible by conventional accelerator techniques. These measurements are unique because the ICF implosions produce weakly coupled, low-density plasmas in which electron screening has no impact on the S-factor. In this poster, the results from these measurements will be presented. This work was supported in part by the U.S. DOE, LLE and LLNL.