February 11, 2012Thanks to implementation of a high-repetition-rate, high-power laser system at the U.S. Department of Energy Office of Science's Advanced Photon Source at Argonne National Lsboratory, it has become possible to study light-induced intramolecular processes and solvent interactions in rapidly evolving molecular systems.
Time-Resolved Research (X-ray Science Division)
The TRR groups has full and partial operational responsibility for 7 experimental stations at 5 beamlines. There are 6 undulator end stations (7-ID-B, 7-ID-C, 7-ID–D, 8-ID-E, 8-ID-I and 14-ID-B) and one bending magnet end station (7-BM-B). Time-resolved pump-probe techniques using, most often, high-power lasers as the pump, are performed in stations 7-ID-C and 7-ID-D and 14-ID-B [which the X-ray Science Division (XSD) runs in partnership with BioCARS]. 7-ID-B is white-beam capable and hosts experiments that probe ultrafast fluid dynamics in high-pressure, high velocity sprays. Station 7-BM-B complements the work performed in 7-ID-B by performing spatial mapping of high pressure, high velocity sprays and aerosols via time-resolved radiography and fluorescence measurements. 8-ID-E primarily supports grazing-incidence scattering (GIXS) devoted to measuring the morphology of organic thin films. 8-ID-I, and to a lesser extent 8-ID-E, apply x-ray photon correlation spectroscopy (XPCS) to study the stability of and very low energy excitations in soft (8-ID-I) and hard (8-ID-E) materials. In addition to the x-ray-beamlines, our group maintains and enhances high-power ultrafast laser systems at 7-ID and 14-ID.
Laser SystemsSpecifications below provide general guidelines. Specific capabilities and requirements should be discussed with the beamline staff.
|System||Station||Rep-rate||Pulse Length||Wavelength||Energy per Pulse|
|Ti:Sapph||7-ID-C, 7-ID-D||1 kHz||100 fs||800, 400 nm||200 μJ|
|Ti:Sapph with OPA||7-ID-C||1 kHz||100 fs||200nm - 20 μ||10 μJ|
|Duetto*||7-ID-D||54 kHz - 6.5 MHz||10 ps||1 or 0.5 μm||10 μJ|
|Spectra Ti:Sapph||14-ID-B||< 1 KHz||1 ps||350 nm - 2 μm||200 μJ|
*Portable system primarily operated and maintained by XSD-AMO in Station 7-ID-D. Available for use in other stations via collaboration or permission of XSD-AMO group and with appropriate safety considerations.