Single-Electron Detection and Spectroscopy via Relativistic Cyclotron Radiation
- Asner, D. M.
- Bradley, Richard F.
- de Viveiros, L.
- Doe, P. J.
- Fernandes, J. L.
- Fertl, M.
- Finn, E. C.
- Jones, A. M.
- Kofron, J. N.
- LaRoque, B. H.
- Leber, M.
- McBride, E. L.
- Miller, M. L.
- Monreal, Benjamin
- Robertson, R. G. H.
- Rosenberg, L. J
- Rybka, G.
- Sternberg, M. G.
- Tedeschi, J. R.
- Thummler, T.
- VanDevender, B. A.
- Woods, N. L.
- Formaggio, Joseph A.
- Furse, Daniel Lawrence
- Mohanmurthy, Prajwal Thyagart
- Solomon-Oblath, Noah
- Rysewyk, Devyn M.
Publication date
April 2015
DOI Publisher
American Physical Society (APS) ISSN
0031-9007 Journal
Physical Review LettersAbstract
It has been understood since 1897 that accelerating charges must emit electromagnetic radiation. Although first derived in 1904, cyclotron radiation from a single electron orbiting in a magnetic field has never been observed directly. We demonstrate single-electron detection in a novel radio-frequency spectrometer. The relativistic shift in the cyclotron frequency permits a precise electron energy measurement. Precise beta electron spectroscopy from gaseous radiation sources is a key technique in modern efforts to measure the neutrino mass via the tritium decay end point, and this work demonstrates a fundamentally new approach to precision beta spectroscopy for future neutrino mass experiments
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