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Hollow cathode lamps – Means of operation and characterization and origin of their emission
Umeå University, Faculty of Science and Technology, Department of Physics.
2018 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The aim of this experiment is to get the basic understanding of the operating principles of hollow cathode lamp, and to characterize the emission of the Rb-element and Ti-element lamp. The spectrum of the lamps is detected by a grating spectrometer and CCD detector. The origin of their emission and different parts of the spectrum including which type of atoms they emitted from, which specific transition they matched and the upper level, lower level and relative intensity correspondingly are identified by comparing with the NIST database. After all the current dependence on the lines emitted from different types of atoms is analyzed quantitatively.

The emission from the gas medium of the lamp Ne can be classified into 3 groups: 4p-4s, 3s-3p, 3p-3d for both lamps because they contain the same gas medium, and the maximum absorption lines of the cathode element of each lamp are also be identified. The intensity of 2 Rb lines varies with current i2.94, i3.27 while that of Ti element have the current dependence i3.62i3.68 respectively. Adding a lens in front of the lamp made a great improvement for the shape of spectrum.

Place, publisher, year, edition, pages
2018.
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-150048OAI: oai:DiVA.org:umu-150048DiVA, id: diva2:1230782
Subject / course
Fysik C - Examensarbete
Available from: 2018-07-04 Created: 2018-07-04 Last updated: 2018-07-04Bibliographically approved

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