Berlin 2005 – scientific programme

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EP: Extraterrestrische Physik

EP 18: Poster-Session I: CAWSES, Atmosph
äre und erdnaher Weltraum

EP 18.6: Poster

Friday, March 4, 2005, 09:00–19:00, Poster TU BH

Upgrading the Kiel Neutron Monitor — •Christian T. Steigies, Andreas Klassen, Klaus Röhrs, Christiane Helmke, and Robert F. Wimmer-Schweingruber — IEAP, Christian-Albrechts-Universität zu Kiel

The Neutron Monitor in Kiel is one of the longest operating Neutron Monitors in the world, it has been operating continuously since the IGY 1957. The original counting electronics was upgraded in the mid-90’s in collaboration with the IZMIRAN group, using a redundant arrangement of standard PCs. Even though this setup has been operating without any problems for the last ten years, the hardware needs replacement to prevent data loss in case of failure of the aging hardware. For this we are preparing a new set of data acquisition electronics that will be set up in parallel to the existing electronics. A programmable automation controller (PAC) is the centrepiece of the upgraded electronics. The PAC runs a real-time OS and can be programmed with LabVIEW. We present data from the Kiel Neutron Monitor for the October/November 2003 events, as well as others, which demonstrate the high resolution and sensitivity of the currently existing system. By using optimal-filtering techniques, we determine onset and decay times of these ground level events (GLE). We investigate the desirability of higher time resolution and its impact on the reliability of the determination of onset times.