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Čerenkov radiation from computer simulations of the γ-ray-initiated atmospheric showers

Черенковское иэлучение иэ мащинных моделирований атмосферных ливней, обраэованных рентгеновскими лучами

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Il Nuovo Cimento A (1965-1970)

Summary

Computer simulations have been made of the spatial and temporal characteristics of the Čerenkov radiation produced in the atmosphere by showers initiated by γ-rays of energy (10÷300) GeV. The simulations contain improvements in detail over those previously available and allowance was made for the effects of the geomagnetic field on the electron cascade development and absorption in the atmosphere of the Čerenkov light. The results are appropriate to a range of detectors at an altitude of 2380 m and at sea-level. Details are given of the average spatial and temporal characteristics of the light flux including isophote plots. The fluctuations in these quantities are specified and the origin of the fluctuations identified.

Riassunto

Si sono fatte simulazioni col calcolatore delle caratteristiche spaziali e temporali della radiazione di Čerenkov prodotta nell’atmosfera da sciami iniziati da raggi γ di energia (10÷300) GeV. Le simulazioni contengono miglioramenti nei dettagli rispetto a quelle precedentemente disponibili e si è tenuto conto degli effetti del campo geomagnetico sullo sviluppo e sull’assorbimento della cascata di elettroni nell’atmosfera della luce di Čerenkov. I risultati sono appropriati per un intervallo di rivelatori ad un’altezza di 2380 m e al livello del mare. Si danno dettagli delle caratteristiche spaziali e temporali del flusso di luce comprendenti diagrammi di isofote. Si specificano le fluttuazioni di queste quantità e si identifica l’origine delle fluttuazioni.

Реэюме

Проводятся мащинные моделирования пространственных и временных характеристик черенковского иэлучения, обраэованного в атмосфере ливнями, выэванными рентгеновскими лучами с знергиями (10÷300) ГзВ. Моделирования содержат ряд усоверщенствований по сравнению с предыдушими рассмотрениями. Вводятся поправки, свяэанные с влиянием геомагнитного поля на раэвитие и поглошение злектронного каскада в атмосфере, для черенковского иэлучения. Полученные реэультаты соответствуют области детекторов на высоте 2380 м и уровне моря. Аналиэируются особенности средних пространственных и временных характеристик светового потока, включая иэофотные диаграммы. Рассматриваются флуктуации зтих величин и идентифицируется происхождение зтих флуктуации.

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Author notes

  1. R. Browning

    Present address: The Appleton Laboratory, Slough, England

Authors and Affiliations

  1. Department of Physics, University of Durham, Durham, England

    R. Browning & K. E. Turver

Authors
  1. R. Browning
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  2. K. E. Turver
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Additional information

The computer programme for the electron-photon cascade is based upon that developed by Drs. A. J. Baxter and D. J. Marsden of the Univeristy of Leeds and has benefitted from the improvements made by Dr. H. R. Allan and colleagues at Imperial College, London, and the present authors.

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Browning, R., Turver, K.E. Čerenkov radiation from computer simulations of the γ-ray-initiated atmospheric showers. Nuov Cim A 38, 223–238 (1977). https://doi.org/10.1007/BF02730021

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  • DOI: https://doi.org/10.1007/BF02730021

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