Impact of varying atmospheric profiles on extensive air shower observation: Fluorescence light emission and energy reconstruction

Keilhauer, B.; Blümer, J.; Engel, R.; Klages, H. O.

doi:10.1016/j.astropartphys.2006.02.005

Cited by 35 publications

(51 citation statements)

References 27 publications

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“…Details can be found in the text. The bars indicate the combination of calculation and input parameters which is favoured in [4]. cal description in [4] are labelled with BK name, where BK stands for the initials of the corresponding author of [4] and name indicates the authors of the input parameters used.…”

Section: Model Calculation and Experimental Datamentioning

confidence: 99%

“…Therefore, the fluorescence efficiency ǫ 0 337.1nm has been set to 0.082% of the deposited energy, the value given by Bunner [7]. The same normalisation for ǫ 0 337.1nm is used in the calculations of [4].…”

Section: Model Calculation and Experimental Datamentioning

confidence: 99%

“…Following the mathematical description in [4], the fluorescence yield (number of photons of wavelength λ produced per meter track length) is written as…”

Section: Model Calculation and Experimental Datamentioning

confidence: 99%

“…In this paper, we extend our previous model calculation for the fluorescence light emission [4] by including the latest results on input parameters and their temperature dependence as obtained in labo- * bianca.keilhauer@ik.fzk.de ratory measurements. For the reconstruction of air shower events, the light emission has to be known in dependence on altitude in the Earth's atmosphere at which the shower is observed.…”

Section: Introductionmentioning

confidence: 99%

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Altitude dependence of fluorescence light emission by extensive air showers

Keilhauer¹,

Blümer²,

Engel³

et al. 2008

Nuclear Instruments and Methods in Physics Research Section A:

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Fluorescence light is induced by extensive air showers while developing in the Earth's atmosphere. The number of emitted fluorescence photons depends on the conditions of the air and on the energy deposited by the shower particles at every stage of the development. In a previous model calculation, the pressure and temperature dependences of the fluorescence yield have been studied on the basis of kinetic gas theory, assuming temperature-independent molecular collision cross-sections. In this work we investigate the importance of temperature-dependent collision cross-sections and of water vapour quenching on the expected fluorescence yield. The calculations will be applied to simulated air showers while using actual atmospheric profiles to estimate the influence on the reconstructed energy of extensive air showers.

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Section: Model Calculation and Experimental Datamentioning

confidence: 99%

Section: Model Calculation and Experimental Datamentioning

confidence: 99%

“…Following the mathematical description in [4], the fluorescence yield (number of photons of wavelength λ produced per meter track length) is written as…”

Section: Model Calculation and Experimental Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Altitude dependence of fluorescence light emission by extensive air showers

Keilhauer¹,

Blümer²,

Engel³

et al. 2008

Nuclear Instruments and Methods in Physics Research Section A:

Self Cite

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“…5 where the lines are grouped into several wavelength bands. The very low pressure dominance of the 391 nm transition is expected [17].…”

Section: Spectrograph Resultsmentioning

confidence: 99%

Techniques of the FLASH thin target experiment

Abbasi

Abu‐Zayyad

Belov

et al. 2008

Nuclear Instruments and Methods in Physics Research Section A:

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Optical emissions associated with terrestrial gamma ray flashes

Célestin

Pasko

2015

JGR Space Physics

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Terrestrial gamma ray flashes (TGFs) are high-energy photon bursts produced by high-energy electrons originating in the Earth's atmosphere through bremsstrahlung processes. In this paper, we present modeling studies on optical emissions resulting from the excitation of air molecules produced by the large population of electrons involved in TGF events based on two possible production mechanisms: relativistic runaway electron avalanches (RREAs) and acceleration of thermal runaway electrons produced by high-potential intracloud lightning leaders. Numerical models developed in this study are first validated through the calculation of fluorescence emissions from air excited by energetic electrons and comparison with available laboratory observations. Detailed discussion of the role of excitation and ionization collisions on the formation of the electron energy distribution is presented. Moreover, using Monte Carlo simulations, we show that electron energy distributions established from the two TGF production mechanisms considered here are inherently different over the full energy range. The strong energy dependence of the capability of electrons to generate excited states responsible for optical emissions from neutral and ionized nitrogen molecules leads to intrinsic differences in optical emissions produced by different mechanisms of TGF production. We also show that TGFs are most likely accompanied by detectable levels of optical emissions and that the distinct optical features are of significant interest for constraining and validating current TGF production models.

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Impact of varying atmospheric profiles on extensive air shower observation: Fluorescence light emission and energy reconstruction

Cited by 35 publications

References 27 publications

Altitude dependence of fluorescence light emission by extensive air showers

Altitude dependence of fluorescence light emission by extensive air showers

Techniques of the FLASH thin target experiment

Optical emissions associated with terrestrial gamma ray flashes

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