Search

Your search keyword '"Nehls, S."' showing total 5 results
Start Over Author "Nehls, S." Topic physics
5 results on '"Nehls, S."'

1. Hadronic interactions and EAS muon pseudorapidities investigated with the Muon Tracking Detector in KASCADE-Grande

Author

Zabierowski, J., Apel, W. D., Arteaga, J. C., Badea, F., Bekk, K., Bertaina, Mario Edoardo, Blumer, H., Bozdog, H., Brancus, I. M., Bruggemann, M., Buch, Holz, Cantoni, Elena Carla, Chiavassa, Andrea, Cossavella, F., Daumiller, K., de So uza, DI PIERRO, Federico, Doll, P., Engel, R., Engler, J., Finger, M., Fuhrm, Ann, Ghia, D., P. L., Gils, H. J., Glasstetter, Grupen, R., Haungs, C., Heck, A., Horandel, D., J. R., Huege, Isar, T., P. G., Kampert, K. H., Kang, Kickelbick, D., Klages, D., H. O., Kolotaev, Luczak, Y., Mathes, P., H. J., Ayer, Mm, H. J., Milke, Mitrica, J., Morello, B., Navarra, G., Nehls, S., ehlschl辰ger, O., Ostapchenko, J., Petcu, S., Pierog, M., Rebel, T., Roth, H., Schieler, M., Schr旦der, H., Sima, F., Stumpert, O., Toma, M., Trinc, Hero, G. C., Ulrich, Van, Buren, Walkowiak, J., Weindl, W., Wochele, A., and Wommer, J.

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Mean value, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Tracking (particle physics), Atomic and Molecular Physics, and Optics, Nuclear physics, KASCADE, Pseudorapidity, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The Muon Tracking Detector in the KASCADE-Grande EAS experiment allows the precise measurement of shower muon directions up to 700 m distance from the shower center. This directional information is used to study the pseudorapidity of muons in EAS, closely related to the pseudorapidity of their parent mesons. Moreover, the mean value of muon pseudorapidity in a registered shower reflects the longitudinal development of its hadronic component. All of this makes it a good tool for testing hadronic interaction models. The possibilities of such tests given by the KASCADE-Grande experimental setup are discussed and an example of the obtained muon pseudorapidity spectrum is shown.

Published
2009

2. Investigation of the S(500) distribution for large air showers detected with the KASCADE-Grande array

Author

Toma, G., Apel, W. D., Arteaga, J. C., Badea, F., Bekk, K., Bertaina, Mario Edoardo, Blumer, J., Bozdog, H., Brancus, I. M., Bruggemann, M., Buchholz, P., Cantoni, Elena Carla, Chiavassa, Andrea, Cossavella, F., Daumiller, K., Souza, De, DI PIERRO, Federico, Doll, P., Engel, R., Engler, J., Finger, M., Fuhrmann, D., Ghia, P. L., Gils, H. J., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Horandel, J. R., Huege, T., Isar, P. G., Kampert, K. H., Kang, D., Kickelbick, D., Klages, H. O., Kolotaev, Y., Luczak, P., Mathes, H. J., Mayer, Hh, . J., Milke, J., Mitrica, B., Morello, C., Navarra, Gianni Maria, Nehls, S., Oehlschlager, J., Ostapchenko, S., Over, S., Petcu, M., Pierog, T., Rebel, H., Roth, M., Schieler, H., Schroder, F., Sima, O., Stumpert, M., Trinchero, G., Ulrich, H., Walkowiak, W., Weindl, A., Wochele, J., Wommer, M., and Zabierowski, J.

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), business.industry, Attenuation, Context (language use), Atomic and Molecular Physics, and Optics, Charged particle, Computational physics, Optics, KASCADE, Angle of incidence (optics), business, Event (particle physics), Energy (signal processing)
Abstract

Previous EAS investigations have shown that the charged particle density becomes independent of the primary mass at certain distances from the shower core and can be used as an estimator for the primary energy. In the context of the KASCADE-Grande experiment, the particular distance to shower core at which t his effect takes place is around 500 m, hence the study at this particular distance and the notation S(500) for the charged particle density. It has been shown that S(500) maps the primary energy. We present results of further investigations in this direction. An attenuation correction function can be derived from the S(500) attenuation with the EAS angle of incidence, allowing us to build an all event S(500) spectrum. In view of a future conversion of the recorded S(500) spectrum to the primary energy, based on simulations a calibration of the observed S(500) values with the primary energies has been worked out (in the energy range accessible to the KASCADE-Grande array, 10 16 – 10 18 eV ).

Published
2009

4. Amplified radio emission from cosmic ray air showers in thunderstorms

Author

Buitink, S., Apel, W. D., Asch, T., Badea, F., Bahren, L., Bekk, K., Bercuci, A., Bertaina, Mario Edoardo, Biermann, P. L., Blumer, J., Bozdog, H., Brancus, I. M., Bruggemann, M., Buchholz, P., Butcher, H., Chiavassa, Andrea, Cossavella, F., Daumiller, K., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Gemmeke, H., Ghia, P. L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Horandel, J. R., Horneffer, A., Huege, T., Kampert, K. H., Kolotaev, Y., Kromer, O., Kuijpers, J., Lafebre, S., Mathes, H. J., Mayer, H. J., Meurer, C., Milke, J., Mitrica, B., Morello, C., Navarra, Gianni Maria, Nehls, S., Nigl, A., Obenland, R., Oehlschlager, J., Ostapchenko, S., Over, S., Petcu, M., Petrovic, J., Pierog, T., Plewnia, S., Rebel, H., Risse, A., Roth, M., Schieler, H., Sima, O., Singh, K., Stumpert, M., Toma, G., Trinchero, G. C., Ulrich, H., van Buren, J., Walkowiak, W., Weindl, A., Wochele, J., Zabierowski, J., Zensus, J. A., and Zimmermann, D.

Subjects
Physics, LOPES, Astronomy, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Radiation, Particle acceleration, Air shower, Space and Planetary Science, Electric field, Ionization, Thunderstorm
Abstract

Cosmic ray air showers produce radio emission, consisting in large part of geosynchrotron emission. Since the radiation mechanism is based on particle acceleration, the atmospheric electric field can play an important role. Especially inside thunderclouds large electric fields can be present. We examine the contribution of an electric field to the emission mechanism theoretically and experimentally. Two mechanisms of amplification of radio emission are considered: the acceleration radiation of the shower particles and the radiation from the current that is produced by ionization electrons moving in the electric field. We selected and evaluated LOPES data recorded during thunderstorms, periods of heavy cloudiness and periods of cloudless weather. We find that during thunderstorms the radio emission can be strongly enhanced. No amplified pulses were found during periods of cloudless sky or heavy cloudiness, suggesting that the electric field effect for radio air shower measurements can be safely ignored during non-thunderstorm conditions., Comment: accepted for publication in A&A, 11 pages, 17 figures

Published
2007
Full Text
View/download PDF

5. Radio emission in air showers measured by LOPES-10 in coincidence with KASCADE-Grande observations

Author

Badea, A. F., Apel, W. D., Asch, T., Bähren, L., Bekk, K., Bercuci, A., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Buitink, S., Brüggemann, M., Buchholz, P., Butcher, H., Chiavassa, A., Cossavella, F., Daumiller, K., Pierro, F. di, Doll, P., Engel, R., Falcke, H., Gemmeke, H., Ghia, P. L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J. R., Horneffer, A., Huege, T., Kampert, K. H., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Mathes, H. J., Mayer, H. J., Meurer, C., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Obenland, R., Oehlschläger, J., Ostapchenko, S., Over, S., Petcu, M., Petrovic, J., Pierog, T., Plewnia, S., Rebel, H., Risse, A., Roth, M., Schieler, H., Sima, O., Singh, K., Stümpert, M., Toma, G., Trinchero, G. C., Ulrich, H., Buren, J. van, Walkowiak, W., Weindl, A., Wochele, J., Zabierowski, J., Zensus, J. A., and Zimmermann, D.

Subjects
Physics, ddc:530
Published
2006
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results