Robert F. Heeter leads experiments on X-ray absorption and emission of high-energy-density plasmas as a staff physicist in the Radiative Properties Group of Physics Division. He received a B.S. in physics from Stanford University in 1993. He joined LLNL as a Lawrence Postdoctoral Fellow in 1999, after completing his Ph.D. in astrophysical sciences (program in plasma physics) at Princeton University, where he measured plasma instabilities in magnetic fusion devices. Since 1999 he has led experiments at the Z facility and the Omega and Jupiter laser facilities, producing X-ray spectra to benchmark codes used in stockpile stewardship, inertial confinement fusion, and the astrophysics of black hole accretion disks.