Time-domain measurement of broadband coherent Cherenkov radiation

P. Miočinović, R. C. Field, P. W. Gorham, E. Guillian, R. Milinčić, D. Saltzberg, D. Walz, and D. Williams
Phys. Rev. D 74, 043002 – Published 7 August 2006

Abstract

We report on further analysis of coherent microwave Cherenkov impulses emitted via the Askaryan mechanism from high-energy electromagnetic showers produced at the Stanford Linear Accelerator Center (SLAC). In this report, the time-domain based analysis of the measurements made with a broadband (nominally 1–18 GHz) log periodic dipole array antenna is described. The theory of a transmit-receive antenna system based on time-dependent effective height operator is summarized and applied to fully characterize the measurement antenna system and to reconstruct the electric field induced via the Askaryan process. The observed radiation intensity and phase as functions of frequency were found to agree with expectations from 0.75–11.5 GHz within experimental errors on the normalized electric field magnitude and the relative phase; σR|E|=0.039μV/MHz/TeV and σϕ=17°. This is the first time this agreement has been observed over such a broad bandwidth, and the first measurement of the relative phase variation of an Askaryan pulse. The importance of validation of the Askaryan mechanism is significant since it is viewed as the most promising way to detect cosmogenic neutrino fluxes at Eν1015eV.

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  • Received 23 February 2006

DOI:https://doi.org/10.1103/PhysRevD.74.043002

©2006 American Physical Society

Authors & Affiliations

P. Miočinović1,*, R. C. Field2, P. W. Gorham1, E. Guillian1, R. Milinčić1, D. Saltzberg3, D. Walz2, and D. Williams3,†

  • 1Department of Physics and Astronomy, University of Hawaii at Manoa, Honolulu, Hawaii, USA
  • 2Stanford Linear Accelerator Center, Stanford University, Menlo Park, California, USA
  • 3Department of Physics and Astronomy, University of California at Los Angeles, Los Angeles, California, USA

  • *Electronic address: predrag@phys.hawaii.edu
  • Present address: Pennsylvania State University, State College, PA, USA

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Issue

Vol. 74, Iss. 4 — 15 August 2006

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