Each spectrograph in the Atomic Spectroscopy Group is among the most
powerful of its type in the world. Collectively, the set of instruments
available to our scientists and guest researchers is unparalleled in the world.
Our spectrographs allow us to record spectra over a large range: from the
extreme ultraviolet (1 nm) to the near infrared (1200 nm). We've
collected spectra on hundreds of atomic systems over the years for data
compilation and astronomical applications, as well as for more applied research
in the lighting and microlithography fields.
Our instruments include:
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- 10.7 m Normal Incidence Vacuum Spectragraph
- Spectral Range: 30 nm to 500 nm
- Plate Factor: 0.078 nm/mm (1st order)
- Detection: Photographic or Scanning Photoelectric
- 10.7 m Eagle Spectrograph
- Spectral Range: 200 nm to 1000 nm
- Plate Factor: 0.078 nm/mm (1st order)
- Detection: Photographic
- 10.7 m Grazing Incidence Vacuum Spectrograph
- Spectral Range: 3 nm to 70 nm
- Plate Factor: 0.012 nm/mm @ 7 nm (1st order)
- Detection: Photographic
- 3.3 m High-resolution Plane-grating Spectrograph
- Spectral Range: 190 to 1200 nm
- Plate Factor: 0.013 to 0.11 nm/mm (order dependent)
- Detection: Photographic
- 2.2 m Grazing Incidence Vacuum Spectrograph
- Spectral Range: 1 nm to 60 nm
- Plate Factor: 0.016 nm/mm @ 1 nm (1st order)
- Detection: Photographic
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10.7 m Normal Incidence Spectrograph
Recent Projects:
- Precision measurement of F2
laser
We recently used our 10.7 m normal incidence vacuum spectrograph to make
precision measurements of the wavelengths of lasing lines in a commercial
molecular fluorine laser at 157 nm.
- Spectra of highly-ionized atoms for fusion plasma diagnostics
As part of our continuing
effort to provide spectroscopic data needed for diagnosis of controlled
fusion plasmas we use our 10.7 m grazing incidence spectrograph to
observe spectra of moderately- and highly-ionized atoms Spectra of Ar, Zr,
Nb, Mo, and W are of particular importance due to their presence in the
edge-plasma regions of tokamak machines.
- Spectrum and energy levels of singly-ionized mercury (Hg II)
The spectra and energy levels of singly-ionized Hg was observed
with out 10.7 m vacuum and air spectrographs. This spectra is of
particular interest because it plays a prominent role in some chemically
peculiar stars recently observed with the Hubble Space Telescope. |
