Development of a Tellurium frequency standard for laser spectroscopy of atomic hydrogen
Development of a Tellurium frequency standard for laser spectroscopy of atomic hydrogen
Doppler free spectra in Tellurium have been examined in the region of 486nm, close to one quarter of the hydrogen and deuterium 1S-2S transitions. The frequency of two selected lines have then been compared to the frequency of a 633nm HeNe laser actively stabilised to the 11-5R(127)'i' transition in I2127. Using a 150MHz plane/plane interferometer the two components were measured to a precision of 2 parts in 1010 (one standard deviation). These measured components constitute a useful transfer standard for the measurement of absolute frequencies of both Balmer β transitions and the 243nm two photon transitions in hydrogen and deuterium. A high density atomic hydrogen beam has been produced, suitable for laser spectroscopy on the 1S-2S transition. With a divergence half angle of 6 degrees the beam density was measured to be 5 x 10^12 atoms cm^-3, 25cm from the nozzle. This source was developed along with several systems for the selective detection of atomic hydrogen. A Tellurium Doppler free spectral feature was also used to actively stabilise an Argon ion laser operating on the 488nm transition. The linewidth of the stabilised laser was measured to be 70MHz with a centre frequency of 614172.88GHz.
University of Southampton
1987
Girkin, John Michael
(1987)
Development of a Tellurium frequency standard for laser spectroscopy of atomic hydrogen.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
Doppler free spectra in Tellurium have been examined in the region of 486nm, close to one quarter of the hydrogen and deuterium 1S-2S transitions. The frequency of two selected lines have then been compared to the frequency of a 633nm HeNe laser actively stabilised to the 11-5R(127)'i' transition in I2127. Using a 150MHz plane/plane interferometer the two components were measured to a precision of 2 parts in 1010 (one standard deviation). These measured components constitute a useful transfer standard for the measurement of absolute frequencies of both Balmer β transitions and the 243nm two photon transitions in hydrogen and deuterium. A high density atomic hydrogen beam has been produced, suitable for laser spectroscopy on the 1S-2S transition. With a divergence half angle of 6 degrees the beam density was measured to be 5 x 10^12 atoms cm^-3, 25cm from the nozzle. This source was developed along with several systems for the selective detection of atomic hydrogen. A Tellurium Doppler free spectral feature was also used to actively stabilise an Argon ion laser operating on the 488nm transition. The linewidth of the stabilised laser was measured to be 70MHz with a centre frequency of 614172.88GHz.
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Published date: 1987
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Local EPrints ID: 461905
URI: http://eprints.soton.ac.uk/id/eprint/461905
PURE UUID: d6afa271-35c4-40f5-a89f-915336942e1c
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Date deposited: 04 Jul 2022 18:58
Last modified: 04 Jul 2022 18:58
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Author:
John Michael Girkin
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