D. Seckel, Univ. of Delaware
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Topics. RF pulses from Showers. Radiation from single particles. ZHS: 2 0.5. Sum over particles/Integrate over shower. Shower Front + Light Cone. Density of Excess Projected Track Length. Separation of Variables & Form Factor. Phase Factors and Rescaling FF. Most MC’s use this.

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Topics
Topics

  • RF pulses from Showers



Sum over particles integrate over shower
Sum over particles/Integrate over shower

Shower Front + Light Cone

Density of Excess Projected Track Length



Phase factors and rescaling ff
Phase Factors and Rescaling FF

Most MC’s use this



Avz zhs g4 later
AVZ, ZHS, (G4 later)

AVZ Use a Gaussian, and give the half-width of the Cerenkov cone

at 1 GHz as 3.72 ° for a 1 PeV (3.1 m) shower.

Determine Gz as FT of gaussian


Scaling vs avz
Scaling vs AVZ

Field calculation is integral

over shower profile

  • Adapted from Alvarez, Vazquez, Zas

  • “Full sim” is approx a

  • Blue – Gaussian for f(z), AVZ approx c for Gy

  • Red – Griessen for f(z)

Separation of shower profile

Separation of phase factors

Separation of form factors

With scaled frequencies





Scaling with medium
Scaling with medium

AVZ scaled

G4


Scaling behavior
Scaling behavior

Single particle & shower signals

Includes LPM effect

to observer

qc

fractional excess

y

z







Acoustic in progress
Acoustic (in progress)

  • Same as radio except

    • scalar vs vector

    • total track length

    • v/c is smaller

    • attenuation

    • experiment bandwidth



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