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UBC Theses and Dissertations
Loading of a far off resonance dipole force trap for stable ³⁹K Prime, Erika
Abstract
The TRIumf Neutral Atom Trap (TRINAT) group is performing precision measurements to test the standard model of the weak interaction. Nuclear β decay asymmetry experiments are carried out on radioactively decaying potassium isotopes, trapped in a Magneto Optical Trap (MOT). In order to accurately test whether parity is fully violated, atoms of well defined polarisation are required. A useful tool which can achieve a high level of polarisation is a Circularly polarized Far Off Resonance dipole Force Trap (CFORT). This work is the first step in its development; building the necessary components in order to successfully load stable ³⁹K into a linearly polarised FORT from a MOT, where the atoms are pre-cooled to a temperature of a few hundred μK. The FORT consists of 700mW of light from a Titanium Sapphire ring laser, linearly polarized and focused with a 200mm achromatic lens to a waist of 35μm. The light is detuned between 1 and 20nm from the D₁ transition and this gives rise to trap depths in the region of a few millikelvin. A characterisation of the FORT loading efficiency and lifetime as a function of FORT beam detuning, power and ellipticity are studied.
Item Metadata
Title |
Loading of a far off resonance dipole force trap for stable ³⁹K
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2005
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Description |
The TRIumf Neutral Atom Trap (TRINAT) group is performing precision
measurements to test the standard model of the weak interaction. Nuclear
β decay asymmetry experiments are carried out on radioactively decaying
potassium isotopes, trapped in a Magneto Optical Trap (MOT). In order to
accurately test whether parity is fully violated, atoms of well defined polarisation
are required. A useful tool which can achieve a high level of polarisation
is a Circularly polarized Far Off Resonance dipole Force Trap (CFORT). This
work is the first step in its development; building the necessary components
in order to successfully load stable ³⁹K into a linearly polarised FORT from
a MOT, where the atoms are pre-cooled to a temperature of a few hundred
μK. The FORT consists of 700mW of light from a Titanium Sapphire ring
laser, linearly polarized and focused with a 200mm achromatic lens to a waist
of 35μm. The light is detuned between 1 and 20nm from the D₁ transition
and this gives rise to trap depths in the region of a few millikelvin. A characterisation
of the FORT loading efficiency and lifetime as a function of FORT
beam detuning, power and ellipticity are studied.
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Genre | |
Type | |
Language |
eng
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Date Available |
2009-12-15
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0085164
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2005-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.