An active transverse energy filter to differentiate low energy particles with large pitch angles in a strong magnetic field oleh K. Gauda, S. Schneidewind, G. Drexlin, A. Fulst, V. Hannen, T. König, A. Lokhov, P. Oelpmann, H.-W. Ortjohann, W. Pernice, R. G. H. Robertson, R. W. J. Salomon, M. Stappers, C. Weinheimer