Thesis
Meissner effect funneling
Washington State University
Master of Science (MS), Washington State University
2011
Handle:
https://hdl.handle.net/2376/103307
Abstract
Meissner Effect funneling is proposed as an alternative method for positron beam focusing. Focusing of a positron beam in a magnetic field funnel can be done using a preferentially-cooled Type I superconductor. A concept description of the effect is presented here as well as the presentation of the first experimental evidence of the effect. Two types of experiments were undertaken to investigate the focusing system. In the first a sample cooling system was placed on a positron beam and magnetic field focusing was measured indirectly using the positron transmission rate through the cylindrical sample. In the second the cooling system was used in a table-top experiment with a magnetic field measurement directly taken along the center axis of the sample. The magnetic field of this setup was simulated before the experiments for predictive comparisons of magnitude and to further understand the features of the system. A magnetic field increase of 5 times the original field was seen in the table-top experiment. During the positron experiment we observed beam focusing on the order of 20% as well as a increase in the beam width as the beam was scanned across the hole in the focusing sample.
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Details
- Title
- Meissner effect funneling
- Creators
- Sean Proctor McNeil
- Contributors
- Kelvin G. Lynn (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; Pullman, Wash. :
- Identifiers
- 99900525133201842
- Language
- English
- Resource Type
- Thesis