학술논문
In situ electromagnetic field diagnostics with an electron plasma in a Penning–Malmberg trap
Document Type
article
Author
Amole, C; Ashkezari, MD; Baquero-Ruiz, M; Bertsche, W; Butler, E; Capra, A; Cesar, CL; Charlton, M; Deller, A; Evetts, N; Eriksson, S; Fajans, J; Friesen, T; Fujiwara, MC; Gill, DR; Gutierrez, A; Hangst, JS; Hardy, WN; Hayden, ME; Isaac, CA; Jonsell, S; Kurchaninov, L; Little, A; Madsen, N; McKenna, JTK; Menary, S; Napoli, SC; Olchanski, K; Olin, A; Pusa, P; Rasmussen, CØ; Robicheaux, F; Sarid, E; Silveira, DM; So, C; Stracka, S; Tharp, T; Thompson, RI; van der Werf, DP; Wurtele, JS
Source
New Journal of Physics. 16(1)
Subject
Language
Abstract
We demonstrate a novel detection method for the cyclotron resonance frequency of an electron plasma in a Penning-Malmberg trap. With this technique, the electron plasma is used as an in situ diagnostic tool for the measurement of the static magnetic field and the microwave electric field in the trap. The cyclotron motion of the electron plasma is excited by microwave radiation and the temperature change of the plasma is measured non-destructively by monitoring the plasma's quadrupole mode frequency. The spatially resolved microwave electric field strength can be inferred from the plasma temperature change and the magnetic field is found through the cyclotron resonance frequency. These measurements were used extensively in the recently reported demonstration of resonant quantum interactions with antihydrogen. © 2014 IOP Publishing and Deutsche Physikalische Gesellschaft.