The Nagoya cosmic-ray muon spectrometer 3, part 4: Track reconstruction method

Details The Nagoya cosmic-ray muon spectrometer 3, part 4: Track reconstruction method The Nagoya cosmic-ray muon spectrometer 3, part 4: Track reconstruction method

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....8...52s&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 8 p 52 (SEE N85-36066 24-93)

Physics

Cosmic Rays, Muons, Particle Trajectories, Time Of Flight Spectrometers, Cameras, Image Reconstruction, Photographic Film, Spark Chambers

Scientific paper

One of the greatest problems in measuring particle trajectories with an optical or visual detector system, is the reconstruction of trajectories in real space from their recorded images. In the Nagoya cosmic-ray muon spectrometer, muon tracks are detected by wide gap spark chambers and their images are recorded on the photographic film through an optical system of 10 mirrors and two cameras. For the spatial reconstruction, 42 parameters of the optical system should be known to determine the configuration of this system. It is almost impossible to measure this many parameters directly with usual techniques. In order to solve this problem, the inverse transformation method was applied. In this method, all the optical parameters are determined from the locations of fiducial marks in real space and the locations of their images on the photographic film by the non-linear least square fitting.

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