At the Advanced Light Source an undulator beamline, with an energy range from 6 to 30 eV, has been constructed for chemical dynamics experiments. The higher harmonics of the undulator are suppressed by a novel, windowless gas filter. In one branchline high flux, 2 % bandwidth radiation is directed toward an end station for photodissociation and crossed molecular beam experiments. A photon flux of 1016 photon/sec has been measured at this end station. In a second branchline a 6.65 m offplane Eagle monochromator delivers narrow bandwidth radiation to an end station for photoionization studies. At this second end station a peak flux of 3 × 1011 was observed for 25,000 resolving power. This monochromator has achieved a resolving power of 70,000 using a 4800 grooves/mm grating, one of the highest resolving powers obtained by a VUV monochromator.
|Original language||English (US)|
|Number of pages||10|
|Journal||Proceedings of SPIE - The International Society for Optical Engineering|
|State||Published - Nov 22 1996|
|Event||Optics for High-Brightness Synchrotron Radiation Beamlines II 1996 - Denver, United States|
Duration: Aug 4 1996 → Aug 9 1996
Bibliographical noteFunding Information:
The authors wish to thank H. Padmore and E. Gullikson for helpful discussions. The contributions of R. DiGennaro, C. Corradi, B. Gee, N. Andreson, G. Morrison, and A. Robb in constructing this beamline must be acknowledged. B. Dolan, 3. Billington and D. Schoeffel of McPherson must also be thanked for their efforts in building the Eagle monochromator. This work is supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Chemical Sciences Division and Materials Sciences Division of the U.S. Department of Energy under Contract Number DE-ACO3-76SF00098.
- Synchrotron beamline
- VUV monochromator