A novel vacuum ultra violet lamp for metastable rare gas experiments

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Autor/in:
Erscheinungsjahr:
2011
Medientyp:
Text
Schlagworte:
  • Krypton
  • Trace analysis
  • Atom trap
  • Particle Accelerators
  • Mass Spectrometry
  • Radiocarbon Dating
  • Krypton
  • Trace analysis
  • Atom trap
  • Particle Accelerators
  • Mass Spectrometry
  • Radiocarbon Dating
Beschreibung:
  • We report on a new design of a vacuum ultra violet (VUV) lamp for direct optical excitation of high laying atomic states, e.g., for excitation of metastable rare gas atoms. The lamp can be directly mounted to ultra-high vacuum vessels (p ≤ 10-10mbar). It is driven by a 2.45 GHz microwave source. For optimum operation, it requires powers of ∼20 W. The VUV light is transmitted through a magnesium fluoride window, which is known to have a decreasing transmittance for VUV photons with time. In our special setup, after a run-time of the VUV lamp of 550 h the detected signal continuously decreased to 25% of its initial value. This corresponds to a lifetime increase of two orders of magnitude compared to previous setups or commercial lamps. © 2011 American Institute of Physics.
Lizenz:
  • info:eu-repo/semantics/openAccess
Quellsystem:
Forschungsinformationssystem der UHH
Interne Metadaten
Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/016f68cb-f1f8-491a-8c30-6149780b30c6