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Proceedings Paper

LOPES: detecting radio emission from cosmic ray air showers
Author(s): Andreas Horneffer; T. Antoni; W. D. Apel; F. Badea; K. Bekk; A. Bercuci; M. Bertaina; H. Bluemer; H. Bozdog; I. M. Brancus; M. Brueggemann; P. Buchholz; C. Buettner; A. Chiavassa; K. Daumiller; C. Marco de Vos; P. Doll; R. Engel; J. Engler; Heino Falcke; F. Fessler; P. L. Ghia; H. J. Gils; R. Glasstetter; A. Haungs; D. Heck; J. R. Hoerandel; T. Huege; Karl-Heinz Kampert; G. W. Kant; H. O. Klages; Y. Kolotaev; Gert Maier; H. J. Mathes; Helmut J. Mayer; J. Milke; C. Morello; M. Mueller; G. Navarra; R. Obenland; J. Oehlschlaeger; S. Ostapchenko; Mihai Petcu; S. Plewnia; H. Rebel; A. Risse; M. Roth; Harald Schieler; J. Scholz; M. Stuempert; T. Thouw; G. C. Trinchero; H. Ulrich; S. Valchierotti; J. van Buren; W. Walkowiak; A. Weindl; J. Wochele; J. Zabierowski; S. Zagromski
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Paper Abstract

Radio pulses emitted in the Atmosphere during the air shower development of high-energy primary cosmic rays were measured during the late 1960ies in the frequency range from 2 MHz to 520 MHz. Mainly due to difficulties with radio interference these measurements ceased in the late 1970ies. LOFAR (Low Frequency Array) is a new digital radio interferometer under development. Using high bandwidth ADCs and fast data processing it it will be able to filter out most of the interference. By storing the whole waveform information in digital form one can analyze transient events like air showers even after they have been recorded. To test this new technology and to demonstrate its ability to measure air showers a "LOFAR Prototype Station" (LOPES) is set up to operate in conjunction with an existing air shower array (KASCADE-Grande). The first phase consisting of 10 antennas is already running. It operates in the frequency range of 40 to 80 MHz, using simple short dipole antennas and direct 2nd Nyquist sampling of the incoming wave. It has proven to be able to do simple astronomical measurements, like imaging of a solar burst. It has also demonstrated how digital interference suppression and beamforming can overcome the problem of radio interference and pick out air shower events.

Paper Details

Date Published: 29 September 2004
PDF: 10 pages
Proc. SPIE 5500, Gravitational Wave and Particle Astrophysics Detectors, (29 September 2004); doi: 10.1117/12.551466
Show Author Affiliations
Andreas Horneffer, Max-Planck-Institut fur Radioastronomie (Germany)
T. Antoni, Univ. Karlsruhe (Germany)
W. D. Apel, Forschungszentrum Karlsruhe (Germany)
F. Badea, Univ. Karlsruhe (Germany)
K. Bekk, Forschungszentrum Karlsruhe (Germany)
A. Bercuci, Forschungszentrum Karlsruhe (Germany)
M. Bertaina, Univ. degli Studi di Torino (Italy)
H. Bluemer, Forschungszentrum Karlsruhe (Germany)
Max-Planck-Institut fur Radioastronomie (Germany)
H. Bozdog, Forschungszentrum Karlsruhe (Germany)
I. M. Brancus, National Institute of Physics and Nuclear Engineering (Romania)
M. Brueggemann, Univ. Siegen (Germany)
P. Buchholz, Univ. Siegen (Germany)
C. Buettner, Univ. Karlsruhe (Germany)
A. Chiavassa, Univ. degli Studi di Torino (Italy)
K. Daumiller, Univ. Karlsruhe (Germany)
C. Marco de Vos, ASTRON (Netherlands)
P. Doll, Forschungszentrum Karlsruhe (Germany)
R. Engel, Forschungszentrum Karlsruhe (Germany)
J. Engler, Forschungszentrum Karlsruhe (Germany)
Heino Falcke, ASTRON (Netherlands)
F. Fessler, Forschungszentrum Karlsruhe (Germany)
P. L. Ghia, Istituto di Fisica dello Spazio Interplanetario, CNR (Italy)
H. J. Gils, Forschungszentrum Karlsruhe (Germany)
R. Glasstetter, Univ. Wuppertal (Germany)
A. Haungs, Forschungszentrum Karlsruhe (Germany)
D. Heck, Forschungszentrum Karlsruhe (Germany)
J. R. Hoerandel, Univ. Karlsruhe (Germany)
T. Huege, Max-Planck-Institut fur Radioastronomie (Germany)
Karl-Heinz Kampert, Univ. Wuppertal (Germany)
G. W. Kant, ASTRON (Netherlands)
H. O. Klages, Forschungszentrum Karlsruhe (Germany)
Y. Kolotaev, Univ. Siegen (Germany)
Gert Maier, Forschungszentrum Karlsruhe (Germany)
H. J. Mathes, Forschungszentrum Karlsruhe (Germany)
Helmut J. Mayer, Forschungszentrum Karlsruhe (Germany)
J. Milke, Forschungszentrum Karlsruhe (Germany)
C. Morello, Istituto di Fisica dello Spazio Interplanetario, CNR (Italy)
M. Mueller, Forschungszentrum Karlsruhe (Germany)
G. Navarra, Univ. degli Studi di Torino (Italy)
R. Obenland, Forschungszentrum Karlsruhe (Germany)
J. Oehlschlaeger, Forschungszentrum Karlsruhe (Germany)
S. Ostapchenko, Univ. Karlsruhe (Germany)
Mihai Petcu, National Institute of Physics and Nuclear Engineering (Romania)
S. Plewnia, Forschungszentrum Karlsruhe (Germany)
H. Rebel, Forschungszentrum Karlsruhe (Germany)
A. Risse, Soltan Institute for Nuclear Studies (Poland)
M. Roth, Univ. Karlsruhe (Germany)
Harald Schieler, Forschungszentrum Karlsruhe (Germany)
J. Scholz, Forschungszentrum Karlsruhe (Germany)
M. Stuempert, Univ. Karlsruhe (Germany)
T. Thouw, Forschungszentrum Karlsruhe (Germany)
G. C. Trinchero, Istituto di Fisica dello Spazio Interplanetario, CNR (Italy)
H. Ulrich, Forschungszentrum Karlsruhe (Germany)
S. Valchierotti, Univ. degli Studi di Torino (Italy)
J. van Buren, Forschungszentrum Karlsruhe (Germany)
W. Walkowiak, Univ. Siegen (Germany)
A. Weindl, Forschungszentrum Karlsruhe (Germany)
J. Wochele, Forschungszentrum Karlsruhe (Germany)
J. Zabierowski, Soltan Institute for Nuclear Studies (Poland)
S. Zagromski, Forschungszentrum Karlsruhe (Germany)

Published in SPIE Proceedings Vol. 5500:
Gravitational Wave and Particle Astrophysics Detectors
James Hough; Gary H. Sanders, Editor(s)

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