# Picosecond timing of Microwave Cherenkov Impulses from High-Energy Particle Showers Using Dielectric-loaded Waveguides

@article{Gorham2017PicosecondTO,
title={Picosecond timing of Microwave Cherenkov Impulses from High-Energy Particle Showers Using Dielectric-loaded Waveguides},
author={P. Gorham and J. Bynes and B. Fox and C. Hast and B. Hill and K. Jobe and C. Miki and R. Prechelt and B. Rotter and D. Saltzberg and S. Wissel and G. Varner and S. Z. U. O. H. A. Manoa and Slac National Accelerator Lab and Ucla and Cal Poly San Luis Obisbo},
journal={arXiv: Instrumentation and Detectors},
year={2017}
}
We report on the first measurements of coherent microwave impulses from high-energy particle-induced electromagnetic showers generated via the Askaryan effect in a dielectric-loaded waveguide. Bunches of 12.16 GeV electrons with total bunch energy of $\sim 10^3-10^4$ GeV were pre-showered in tungsten, and then measured with WR-51 rectangular (12.6 mm by 6.3 mm) waveguide elements loaded with solid alumina ($Al_2 O_3$) bars. In the 5-8 GHz $TE_{10}$ single-mode band determined by the presence of… Expand

#### References

SHOWING 1-10 OF 22 REFERENCES
Observation of the Askaryan effect: coherent microwave Cherenkov emission from charge asymmetry in high-energy particle cascades.
The first direct experimental evidence for the charge excess in high-energy particle showers and corresponding radio emission predicted nearly 40 years ago by Askaryan is presented, providing strong support for experiments designed to detect high- energy cosmic rays such as neutrinos via coherent radio emission from their cascades. Expand
Observation of coherent Smith-Purcell radiation from short-bunched electrons.
• Ishi, +6 authors Fujita
• Physics, Medicine
• Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
• 1995
Coherent Smith-Purcell radiation, generated by the passage of short-bunched electrons of relativistic energy of 42 MeV above the surface of a metallic grating, has been observed in the wavelengthExpand
Radio-frequency measurements of coherent transition and cherenkov radiation: implications for high-energy neutrino detection
• Gorham, +4 authors Condé
• Physics, Medicine
• Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
• 2000
Measurements of (11-18)-cm wavelength radio emission from interactions of 15.2 MeV pulsed electron bunches at the Argonne Wakefield Accelerator emulate the large electron excess expected to develop during an electromagnetic cascade initiated by an ultrahigh-energy particle. Expand
Beam test results of a 16 ps timing system based on ultra-fast silicon detectors
Abstract In this paper we report on the timing resolution obtained in a beam test with pions of 180 GeV/c momentum at CERN for the first production of 45 µm thick Ultra-Fast Silicon Detectors (UFSD).Expand
Observation of coherent cerenkov radiation from a solid dielectric with short bunches of electrons
• Takahashi, Ishi
• Physics, Medicine
• Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
• 2000
Short bunches of 150-MeV electrons of a linear accelerator passed along the surface of a crystal quartz or a teflon and coherent Cerenkov radiation from the solid dielectrics has been observed in theExpand
Excess negative charge of an electron-photon shower and its coherent radio emission
We investigate the excess of electrons in an electron-photon shower. This excess is caused by annihilation of the positrons in flight and by the Compton and $\delta$-electrons in the cascade. It isExpand
Electronic processes in semiconductor materials studied by nanosecond time-resolved microwave conductivity—III. Al2O3, MgO and TiO2 powders
Abstract Electronic charge carriers have been produced in commercial and special laboratory samples of Al2O3, MgO and TiO2 powders by band-gap excitation using nanosecond pulses of high-energy (3 MeVExpand
New limits on the ultrahigh energy cosmic neutrino flux from the ANITA experiment.
• P. Gorham, +40 authors F. Wu
• Physics, Medicine
• Physical review letters
• 2009
Upper limits derived from the analysis rule out the highest cosmogenic neutrino models, as six events consistent with radio impulses from ultrahigh energy extensive air showers are detected in a background horizontal-polarization channel. Expand
RD for a Dedicated Fast Timing Layer in the CMS Endcap Upgrade
The PhaseII Upgrades of CMS are being planned for the High Luminosity LHC (HL-LHC) era when the mean number of interactions per beam crossing ("in-time pileup") is expected to reach ~140-200. TheExpand
Thermal noise and correlations in photon detection.
A technique for rigorously calculating thermal photon noise, which allows for arbitrary numbers of optical inputs and detectors, multiple-mode illumination, and both internal and external noise sources, is described. Expand