Time-domain measurement of broadband coherent Cherenkov radiation

Journal Article · Tue Aug 15 00:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.043002· OSTI ID:20870939

Miocinovic, P; Gorham, P W; Guillian, E; Milincic, R ^[1]; Field, R C; Walz, D ^[2]; Saltzberg, D; Williams, D ^[3]

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1. Department of Physics and Astronomy, University of Hawaii at Manoa, Honolulu, Hawaii (United States)
2. Stanford Linear Accelerator Center, Stanford University, Menlo Park, California (United States)
3. Department of Physics and Astronomy, University of California at Los Angeles, Los Angeles, California (United States)

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; {sigma}{sub RvertcalbarEverticalbar}=0.039 {mu}V/MHz/TeV and {sigma}{sub {phi}}=17 deg. 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 E{sub {nu}}(greater-or-similar sign)10{sup 15} eV.

• OSTI ID: 20870939
• Journal Information: Physical Review. D, Particles Fields, Vol. 74, Issue 4; Other Information: DOI: 10.1103/PhysRevD.74.043002; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANTENNAS
CASCADE SHOWERS
CHERENKOV RADIATION
COSMIC NEUTRINOS
DIPOLES
ELECTRIC FIELDS
FREQUENCY DEPENDENCE
GHZ RANGE
MHZ RANGE
MICROWAVE RADIATION
PERIODICITY
PHOTON EMISSION
PULSES
STANFORD LINEAR ACCELERATOR CENTER
TEV RANGE
TIME DEPENDENCE