Time‐Resolved Research at the Advanced Photon Source Beamline 7‐ID

The Sector 7 undulator beamline (7‐ID) of the Advanced Photon Source (APS) is dedicated to time‐resolved x‐ray research and is capable of ultrafast measurements on the order of 100 ps. Beamline 7‐ID has a laser laboratory featuring a Ti:Sapphire system (average power of 2.5 W, pulse duration <50 fs, repetition rate 1–5 kHz) that can be synchronized to the bunch pattern of the storage ring. The laser is deliverable to x‐ray enclosures, which contain diffractometers, as well as motorized optical tables for table‐top experiments. Beamline 7‐ID has a single APS Undulator A and uses a diamond (111) double‐crystal monochromator, providing good energy resolution over a range of 6–24 keV. Available optics include Kirkpatrick‐Baez (KB) mirrors to microfocus the x‐ray beam. A variety of time‐resolved diffraction and spectroscopy research is available at 7‐ID, with experiments being done in the atomic, molecular, optical, chemistry, and solid state (bulk and surface) fields.