Leiden University Student Repository

Stolpe, M.F. van de (2017)

Power dissipation of a superconducting radio frequent source at 6K

Master thesis | Physics (MSc)

One of the limiting factors for improving the sensitivity towards single spin detection using Magnetic Resonance Force Microscopy is the working temperature. A component limiting this working temperature is the radio frequent (RF) source. The use of a superconducting NbTiN instead of a copper RF-source improves this working temperature and theory suggests that the dissipation of such a NbTiN RF-source is geometry dependent. The dissipation of 9 NbTiN RF-sources with different geometries was measured using two different methods. First a four-point measurement was used that returned inductive effects obscuring the dissipation of the RF-source. Secondly a calorimetric measurement was tried that returned dissipation originating in the supply cables overshadowing the dissipation of the RF-source. The dissipation of these supply cables corresponds very well with the dissipation attributed to the RF-source by our predecessors. The dissipation of the RF-source is thus found to be much lower...Show moreOne of the limiting factors for improving the sensitivity towards single spin detection using Magnetic Resonance Force Microscopy is the working temperature. A component limiting this working temperature is the radio frequent (RF) source. The use of a superconducting NbTiN instead of a copper RF-source improves this working temperature and theory suggests that the dissipation of such a NbTiN RF-source is geometry dependent. The dissipation of 9 NbTiN RF-sources with different geometries was measured using two different methods. First a four-point measurement was used that returned inductive effects obscuring the dissipation of the RF-source. Secondly a calorimetric measurement was tried that returned dissipation originating in the supply cables overshadowing the dissipation of the RF-source. The dissipation of these supply cables corresponds very well with the dissipation attributed to the RF-source by our predecessors. The dissipation of the RF-source is thus found to be much lower than previously thought.Show less

dissipation superconductor radio frequency

Author

Stolpe, M.F. van de

Faculty

Faculty of Science

Specialisation

Physics

Supervisors

Oosterkamp, T.H.

ECTS Credits

5

Language

en