First synchrotron infrared beamlines at the Advanced Light Source:211 Spectromicroscopy and fast timing

摘要

Two recently commissioned infrared beamlines on the 1.4 bending magnet port at211u001ethe Advanced Light Source, LBNL, are described. Using a synchrotron as an IR 211u001esource provides three primary advantages: increased brightness, very fast light 211u001epulses, and enhanced far-IR flux. The considerable brightness advantage manifests 211u001eitself most beneficially when performing spectroscopy on a microscopic length 211u001escale. Beamline (BL) 1.4.3 is a dedicated FTIR spectromicroscopy beamline, where 211u001ea diffraction-limited spot size using the synchrotron source is utilized. BL 211u001e1.4.2 consists of a vacuum FTIR bench with a wide spectral range and step-scan 211u001ecapability. This BL makes use of the pulsed nature of the synchrotron light as 211u001ewell as the far-IR flux. Fast timing is demonstrated by observing the pulses from 211u001ethe electron bunch storage pattern at the ALS. Results from several experiments 211u001efrom both IR beamlines will be presented as an overview of the IR research 211u001ecurrently being done at the ALS.