The Chemical Dynamics Beamline (CDB) is located at the Advanced Light Source (ALS), a national user facility at the Lawrence Berkeley National Laboratory. The beamline is devoted to the study of fundamental chemical processes using vacuum ultraviolet light generated by an undulator at the ALS. The photon light is tunable between 7.4 eV and 30 eV.
The beamline is operated and maintained by a group of staff scientists, post-doctoral fellows, and graduate students. Outside users collaborate with the beamline staff to perform studies of fundamental chemical interactions, combustion, interstellar and environmental chemistry, and materials. The scope of research includes all areas of chemical physics. New directions in microscopies, aerosol science, kinetics, structure, and dynamics of gas phase, cluster studies, among others, are encouraged.
Beamtime is distributed among CDB Staff and independent investigators. In order to obtain beamtime, independent investigators must submit a proposal to the ALS. Proposals are submitted twice a year, typically six months in advance. Please see the ALS User Guide for instructions. Independent investigators should first establish contact with the beamline staff and discuss their interest in detail.
Four terminals are available at the beamline. Terminals 1 and 2 (T1 and T2) provide low resolution broadband light with a photon flux ~10 15 photons/s. T1 can accommodate roll-up endstations, while T2 has a permanent imaging endstation. The remaining two terminals (T3 and T4) provide medium resolution, monochromatized light with a photon flux ~1013 photons/s. These terminals allow for roll-up endstations. Please see the Research tab for information about our roll-up endstations. Potential users may also bring their own endstations, vacuum chambers, electronics, detectors, etc. for carrying out experiments. Those systems must adhere to standard platforms and meet synchrotron safety requirements. Experiments and their special needs must be planned well in advance.