Performance of the high-resolution beamline for atomic and molecular physics at the advanced light source

Beamline 9.0.1 at the Advanced Light Source provides an intense photon beam with high spectral resolution and is well suited for a variety of experiments in atomic and molecular physics. The high brightness synchrotron source, 4.5 m long undulator and high quality spherical grating monochromator are all critical to the high performance of the beamline. The accessible photon energy range covers 20 to 300 eV with approximately 1012 photons per second with a bandwidth of one part in 10,000. The resolution-flux ratio can be varied to meet the demands of the experiment. Very high resolution spectra of the He double excitation resonances have recently been obtained, for example, using slit widths of < 5 μm. Examples of high resolution photoionization, ion yield and photoelectron spectra measured using beamline 9.0.1 will be presented