Paper

Larmor Power Limit for Cyclotron Radiation of Relativistic Particles in a Waveguide

Hayen, L, Smith, E, Fertl, M, Müller, P, Young, A R, Novitski, E, García, A, Malavasi, L, Oblath, N S, Swanson, H E, VanDevender, B A, McClain, D, Dodson, B, Byron, W, Buzinsky, N, Robertson, R G H, Harrington, H, Stancil, D D, Tedeschi, J R, Goodson, A P, Taylor, R J, Storm, D W, Wietfeldt, F E, Melconian, D, Savard, G, DeGraw, W, Graner, B, Rybka, G

2024

Overview

Cyclotron radiation emission spectroscopy (CRES) is a modern technique for high-precision energy spectroscopy, in which the energy of a charged particle in a magnetic field is measured via the frequency of the emitted cyclotron radiation. The He6-CRES collaboration aims to use CRES to probe beyond the standard model physics at the TeV scale by performing high-resolution and low-background beta-decay spectroscopy of \\(^6He\\) and \\(^19Ne\\). Having demonstrated the first observation of individual, high-energy (0.1 -- 2.5 MeV) positrons and electrons via their cyclotron radiation, the experiment provides a novel window into the radiation of relativistic charged particles in a waveguide via the time-derivative (slope) of the cyclotron radiation frequency, \\(df_c/dt\\). We show that analytic predictions for the total cyclotron radiation power emitted by a charged particle in circular and rectangular waveguides are approximately consistent with the Larmor formula, each scaling with the Lorentz factor of the underlying \\(e^\\) as \\(^4\\). This hypothesis is corroborated with experimental CRES slope data.

• Publisher: Cornell University Library, arXiv.org
• Subject: Beta decay / Charged particles / Cyclotron radiation / Cyclotrons / Lorentz factor / Particle physics / Positrons / Radiation / Rectangular waveguides / Relativistic effects / Relativistic particles / Spectrum analysis