Performance of the VUV high-resolution and high-flux beamline for chemical dynamics studies at the Advanced Light Source

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 off-plane Eagle monochromator delivers narrow bandwidth radiation to an end station for photoionization studies. At this second end station a peak flux of 3 X 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.

[1]  M. Koike,et al.  High-resolution VUV spectroscopic facility at the photon factory. , 1986, Applied optics.

[2]  T. Namioka.  Design of High-Resolution Monochromator for the Vacuum Ultraviolet. An Application of Off-Plane Eagle Mounting*† , 1959 .

[3]  R. Korde,et al.  Stability and quantum efficiency performance of silicon photodiode detectors in the far ultraviolet. , 1989, Applied optics.

[4]  Philip A. Heimann,et al.  Design of a high-resolution step-and-scan type monochromator capable of tuning to undulator radiation over a wavelength range of 80-180 nm , 1996, Optics & Photonics.

[5]  Transmission grating spectrometer for characterization of undulator radiation , 1994 .

[6]  J. Cable,et al.  One gigarad passivating nitrided oxides for 100% internal quantum efficiency silicon photodiodes , 1993 .

[7]  P Z Takacs,et al.  Optical constants for thin films of C, diamond, Al, Si, and CVD SIC from 24 A to 1216 A. , 1988, Applied optics.

[8]  B. Gee,et al.  VUV high resolution and high flux beamline for chemical dynamics studies at the advanced light source , 1994 .

[9]  H. D. Morgan,et al.  The very high resolution spectrometer at the National Institute of Standards and Technology , 1994 .

[10]  F. B. Orth,et al.  Vacuum UV performance of a new 6.65-m concave diffraction grating with 4800 grooves/mm. , 1986, Applied optics.

[11]  K. Ueda,et al.  High-resolution measurement for photoabsorption cross sections in the autoionization regions of Ar, Kr and Xe , 1993 .

[12]  M. Bissen,et al.  Cleaning of optical surfaces with photogenerated reactants , 1994 .

[13]  J. Berkowitz,et al.  Photoionization mass spectrometry of neon using synchrotron radiation: Anomalous variation of resonance widths in the noble gases , 1979 .

[14]  A. Kung,et al.  A differentially pumped harmonic filter on the Chemical Dynamics Beamline at the Advanced Light Source , 1995 .

[15]  H. Hotop,et al.  On the Ne(2p5ns',nd') autoionisation resonances: high-resolution measurement and quantum defect analysis , 1983 .

[16]  E. Gullikson,et al.  A Soft X-Ray/EUV Reflectometer Based on a Laser Produced Plasma Source. , 1992, Journal of X-ray science and technology.