Amplitude calibration of a digital radio antenna array for measuring cosmic ray air showers (2008)
Nehls, S., Hakenjos, A., Arts, M. J., Bluemer, J., Bozdog, H., Van Cappellen, W. A., ...
Radio pulses are emitted during the development of air showers, where air showers are generated by ultra-high energy cosmic rays entering the Earth's atmosphere. These nanosecond short pulses are...
EAS RADIO DETECTION WITH LOPES (2008)
A. Haungs, W. D. Apel, T. Asch, L. Bähren, K. Bekk, A. Bercuci, ...
1 LOPES is set up at the location of the KASCADE-Grande extensive air shower experiment in Karlsruhe, Germany and aims to measure and calibrate radio pulses from Extensive Air Showers. Data taken...
Outdoor evaluation of FLATCON® modules and systems (2008)
Bett, A.W., Jaus, J., Peharz, G., Siefer, G., Hakenjos, A., Heile, I., ...
This paper reviews outdoor performance measurements conducted on FLATCON® modules and systems. It highlights the influence of spectra, humidity, temperature, and acceptance angle on the module...
Amplitude calibration of a digital radio antenna array for measuring cosmic ray air showers. (2008)
Nehls, S., Hakenjos, A., Arts, M.J., Blümer, J., Bozdog, H., Van Cappellen, W.A., ...
Nuclear Instruments and Methods in Physics Research A, 589(2008) S.350-61
Hogarth, W.H.J., Steiner, J., Benziger, J.B., Hakenjos, A.
A 20 cm2 segmented anode fuel cell is used to investigate the performance of a hydrogen-air fuel cell at 1 atm. with two different flow-fields using spatially-resolved current and impedance...
Start up and freezing processes in PEM fuel cells (2007)
Oszcipok, M., Hakenjos, A., Riemann, D., Hebling, C.
The isothermal operation of single PEM fuel cells below 0 degrees C is investigated by potentiostatic experiments and analyzed by physical modeling. Current decay is observed during potentiostatic...
Gerteisen, D., Hakenjos, A., Schumacher, J.O.
A one-dimensional model of the PEM fuel cell cathode is developed to analyse ac impedance spectra and polarisation curves. The porous gas diffusion electrode is assumed to consist of a network of...
Hogarth, WHJ, Steiner, J, Benziger, JB, Hakenjos, A
A 20 cm(2) segmented anode fuel cell is used to investigate the performance of a hydrogen-air fuel cell at 1 atm. with two different flow-fields using spatially-resolved current and impedance...
Simultaneous electrochemical impedance spectroscopy of single cells in a PEM fuel cell stack (2006)
Hakenjos, A., Zobel, M., Clausnitzer, J., Hebling, C.
A measurement set-up is presented containing a multichannel frequency response analyser system that allows the measurements of impedance spectra of single cells in a fuel cell stack simultaneously....
Die absolute Kalibrierung von LOPES30. (2006)
Frühjahrstagung DPG, Fachverband Teilchenphysik, Dortmund, 28.-31.März 2006
Absolute calibration of the LOPES antenna system. (2006)
Nehls, S., Apel, W.D., Badea, F., Bähren, L., Bekk, K., Bercuci, A., ...
Nahnhauer, R. [Hrsg.]
Kalibration eines astronomischen Radioantennenfeldes durch eine externe Quelle. (2006)
Wissenschaftliche Berichte, FZKA-7219 (Mai 2006)
Absolute calibration of the LOPES antenna system. (2006)
Nehls, S., Apel, W.D., Badea, F., Bähren, L., Bekk, K., Bercuci, A., ...
International Journal of Modern Physics A, 21(2006) Suppl.1, S.187-91
Calibration of LOPES30. (2005)
79.Jahrestagung der Astronomischen Gesellschaft, Köln, 26.September - 1.Oktober 2005
Absolute calibration of LOPES30. (2005)
Workshop 'Astroteilchenphysik in Deutschland: Status und Perspektiven 2005', DESY, Zeuthen, 4.-7.Oktober 2005
WO2004055535 A UPAB: 20040805 NOVELTY - Method for measuring the electrical properties of electrochemical cells arranged in series in which the current through the individual cells and voltage across...
Hakenjos, A., Muenter, H., Wittstadt, U., Hebling, C.
A fuel cell has been designed that combines three methods of spatially resolved measurements. The experimental setup allows to perform a simultaneous evaluation of current, temperature and water...
Hakenjos, A., Tüber, K., Schumacher, J.O., Hebling, C.
The characterisation of a proton exchange membrane (PEM) fuel cell with a straight channel flow field design is performed. Spatially resolved current distribution measurements, at different air flow...
PEM fuel cells for the power supply of electronic appliances (2003)
Hebling, C., Burger, B., Hakenjos, A., Hesselmann, J., Münter, H., Pócza, D., ...