Channeling of vacuum ultraviolet radiation down tapered capillaries and prospects for a photoemission spectromicroscopy
Smith, N. V. ; Royer, W. A. ; Rowe, J. E.
[S.l.] : American Institute of Physics (AIP)
Published 1994
[S.l.] : American Institute of Physics (AIP)
Published 1994
| ISSN: |
1089-7623
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|---|---|
| Source: |
AIP Digital Archive
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| Topics: |
Physics
Electrical Engineering, Measurement and Control Technology
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| Notes: |
The transmission of linear tapered silica-glass capillaries is calculated both numerically and analytically for photon energies in the vacuum-ultraviolet region (10–200 eV). The channeling factor C (ratio of transmitted to line-of-sight flux) is given to a good approximation by 2γ/β, where β is the taper angle and γ is a characteristic decay angle determined entirely by the optical constants. The angular divergence (FWHM) of the output flux is 2.4 (βγ)1/2, and the useful length of the capillary is 2dγβ−3/2, where d is the diameter of the exit aperture. Experimental measurements of photoemission spectra on Au samples using tapered capillaries attached to the end of a conventional resonance lamp confirm these expectations. Channeling factors greater than 103 should be achievable with submicron values of d.
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| Type of Medium: |
Electronic Resource
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| URL: |