Towards experiments on a superconducting atom chip.
This thesis widely reviews the literatures on laser cooling and trapping, magnetic trapping and atom chip. Temperatures and atom number densities of 87-Rubidium cloud in our magneto-optical trap, compressed magneto-optical trap and molasses experiments are reported. For `Z' traps with wires...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2009
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| Online Access: | http://hdl.handle.net/10356/18096 |
| _version_ | 1811690818852880384 |
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| author | Wu, Xing. |
| author2 | Rainer Helmut Dumke |
| author_facet | Rainer Helmut Dumke Wu, Xing. |
| author_sort | Wu, Xing. |
| collection | NTU |
| description | This thesis widely reviews the literatures on laser cooling and trapping, magnetic
trapping and atom chip. Temperatures and atom number densities of 87-Rubidium cloud
in our magneto-optical trap, compressed magneto-optical trap and molasses experiments
are reported. For `Z' traps with wires of width-to-thickness ratio = 500, discrepancy in the magnetic field distribution from those of `Z' wires at much more moderate widthto-thickness ratio during the compressing stage is discovered through simulations with Finite Element Method. Offset magnetic field has to be reduced in order to recover the normal feature of a `Z' trap during the compressing stage. The thermally induced atom spin flip lifetime in our `Z' trap is also approximated. The design of a cold finger structure which can enhance the cooling of a YBCO superconducting atom chip inside a liquid nitrogen cryostat to below critical temperature is summarized. The distortion
to the magnetic quadrupole trap due to the eddy current inside a nearby chip holder at
liquid nitrogen temperature during the fast switching of the trap is investigated. |
| first_indexed | 2024-10-01T06:10:03Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/18096 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:10:03Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-10356/180962023-02-28T23:15:55Z Towards experiments on a superconducting atom chip. Wu, Xing. Rainer Helmut Dumke School of Physical and Mathematical Sciences NTU Ultra Cold Atom Laboratory DRNTU::Science This thesis widely reviews the literatures on laser cooling and trapping, magnetic trapping and atom chip. Temperatures and atom number densities of 87-Rubidium cloud in our magneto-optical trap, compressed magneto-optical trap and molasses experiments are reported. For `Z' traps with wires of width-to-thickness ratio = 500, discrepancy in the magnetic field distribution from those of `Z' wires at much more moderate widthto-thickness ratio during the compressing stage is discovered through simulations with Finite Element Method. Offset magnetic field has to be reduced in order to recover the normal feature of a `Z' trap during the compressing stage. The thermally induced atom spin flip lifetime in our `Z' trap is also approximated. The design of a cold finger structure which can enhance the cooling of a YBCO superconducting atom chip inside a liquid nitrogen cryostat to below critical temperature is summarized. The distortion to the magnetic quadrupole trap due to the eddy current inside a nearby chip holder at liquid nitrogen temperature during the fast switching of the trap is investigated. Bachelor of Science in Physics 2009-06-19T07:31:38Z 2009-06-19T07:31:38Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/18096 en 68 p. application/pdf |
| spellingShingle | DRNTU::Science Wu, Xing. Towards experiments on a superconducting atom chip. |
| title | Towards experiments on a superconducting atom chip. |
| title_full | Towards experiments on a superconducting atom chip. |
| title_fullStr | Towards experiments on a superconducting atom chip. |
| title_full_unstemmed | Towards experiments on a superconducting atom chip. |
| title_short | Towards experiments on a superconducting atom chip. |
| title_sort | towards experiments on a superconducting atom chip |
| topic | DRNTU::Science |
| url | http://hdl.handle.net/10356/18096 |
| work_keys_str_mv | AT wuxing towardsexperimentsonasuperconductingatomchip |