2012/07/08 by T. J. Harrison, Timothy Harrison, Harrison, Timothy
Computer Science · Materials Science · Physics and Astronomy · #Diamond and Carbon-based Materials Research #Electronic and Structural Properties of Oxides #Quantum Information and Cryptography #physics.plasm-ph #quant-ph
paper · pdf · doi:10.48550/arxiv.1207.1901
A Part III Project at the University of Cambridge Physics department under the supervision of Prof. Michael Köhl in the Atomic and Optical Physics department: http://www.quantumoptics.eu Thanks is given to Prof. Michael Köhl,Matthias Steiner and Hendrik Meyer for their help and advice. SEE VIDEOS: http://youtu.be/8rUrHVuBlc8 SEE HIGH RES PDF: http://dl.dropbox.com/u/79619909/th347project.pdf
arxiv created 2012/09/08 · arxiv updated 2012/09/11
A plasma glow discharge system was created using a conventional microwave oven to ignite and maintain the plasma. The system was used for plasma cleaning and its properties were analysed to assess its viability for removing surface contaminants, which cause anomalous heating, from Paul trap electrodes used in ion trapping. Qualitative results showed that the argon plasma could remove copper oxide layers formed on thin sheets in 1-2 minutes. The addition of air into the plasma system allowed for the cleaning of more complex hydrocarbon contaminants, as highlighted by the removal of permanent marker pen. The surface removal rate of the system was evaluated by measuring the time taken to remove gold plating from washers and aluminium plates. A nominal rate of 5-15 nm per min was found under optimal conditions. Plasma treatment, in addition to wet chemical cleaning, was found to increase the finesse of an optical cavity by a factor of two, compared to acetone cleaning alone. These results are promising for the system's in-situ use on Paul trap electrodes and could be a feasible technique for increasing their lifetime.