Anita-Sim David Seckel, ANITA Collab. Mtg. Nov. 24-25, /2002 Notes on building a full ANITA simulation

David Seckel, ANITA Collab. Mtg. Nov. 24-25, /2002

Anita-Sim

Notes on building a full ANITA simulation.


Anita-Sim

Outline

• Event Generator

• Shower parameterization

• Pulse

• Propagation through ice

• Ice/air interface

• Propagation through air

• Antennas

• Instrument model 1: trigger side

• Instrument model 2: waveform side


Anita-Sim

Event Generator

• Earth model

• Need local topography, geology, air

• Neutrino cross-sections standard model PQCD (+/- 25%)– NC/CC different levels of agreement.

• Non standard model cross-sections

• Tau propagation

• Other particles…Monopoles…


Anita-Sim

Shower parameterization

• simple: Nmax, curvature d2N/dx2

• list of sub-showers … tbd


Anita-Sim

Pulse creation

• Real pulse includes all the propagation issues…

• Do a spectral analysis, reconstruct at the antenna


Anita-Sim

Propagation through Ice

• Attenuation (temperature, composition)

• Refraction

• Scattering ?

• bi-refringence


Anita-Sim

Ice/Air interface

• Surface roughness

• Multiple lines of site

• Shadowing

• Polarization


Anita-Sim

Propagation through air

• Dispersion

• Refraction


Anita-Sim

Antennas

• Angular and spectral, polarization response.

• Mutual impedence

• Calibrated instrument

• Simulate noise


Anita-Sim

Instrument trigger

• TBD

• Frequency domain until it hits the discriminator

• convert to time domain at disc


Anita-Sim

Instrument Waveform Digization

• TBD

• RF instrument

• freq -> time domain

• Characteristics of digitizers…

• Maintain database of instrument state

• channel characteristics

Documents

Anita-Sim David Seckel, ANITA Collab. Mtg. Nov. 24-25, /2002 Notes on building a full ANITA simulation