Observation of Radar Echoes from High-Energy Particle Cascades

S. Prohira, K. D. De Vries, P. Allison, J. Beatty, D. Besson, A. Connolly, N. Van Eijndhoven, C. Hast, C. Y. Kuo, U. A. Latif, T. Meures, J. Nam, A. Nozdrina, J. P. Ralston, Z. Riesen, C. Sbrocco, J. Torres, S. Wissel

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


We report the observation of radar echoes from the ionization trails of high-energy particle cascades. Data were taken at the SLAC National Accelerator Laboratory, where the full electron beam (∼109 e- A t ∼10 GeV/e-) was directed into a plastic target to simulate an ultrahigh-energy neutrino interaction. The target was interrogated with radio waves, and coherent radio reflections from the cascades were detected with properties consistent with theoretical expectations. This is the first definitive observation of radar echoes from high-energy particle cascades, which may lead to a viable neutrino detection technology for energies -1016 eV.

Original languageEnglish (US)
Article number091101
JournalPhysical review letters
Issue number9
StatePublished - Mar 6 2020

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


Dive into the research topics of 'Observation of Radar Echoes from High-Energy Particle Cascades'. Together they form a unique fingerprint.

Cite this