List of Figures and Tables

Figure 2-1 Cross section the PiBeta detector
Figure 2-2 Plastic Scintillator Hodoscope strips in assembly
Figure 2-3 Spectrum obtained with Hodoscope
Figure 2-4 Support Structure
Figure 2-5 Timing of Trigger
Figure 2-6 Scheme of Clusters and Superclusters
Figure 2-7 PiBeta detector
Figure 3-1 CsI Calorimeter
Figure 3-2 Fundamental Triangle from Geodesic Breakdown
Figure 3-3 Linear Attenuation Coefficient of CsI as a function of photon energy.
Figure 3-4 Atypical shower distributions of 50 MeV photons
Figure 3-5 Light Emission Spectrum of pure CsI
Figure 3-6 Response function of CsI crystal to cosmic muons
Figure 3-7 Comparison of common reflecting materials
Figure 3-8 Influence of uniformity from treatment of the front side
Figure 3-9 Cut through the Crystal Tomography Apparatus
Figure 3-10 Two dimensional tomography pictures of a CsI crystal
Figure 3-11 CsI crystal uniformity obtained with a Cs source and cosmic muons
Figure 3-12 Layout of the RASTA apparatus
Figure 3-13 Determination of light yield
Figure 4-1 CsI assembly
Figure 4-2 CsI assembly
Figure 4-3 Detector Acceptances
Figure 4-4 Angular resolution and position reconstruction
Figure 4-5 Differences in angular resolution for positrons and photons
Figure 4-6 Comparison of the angular resolution of photons and positrons at different energies.
Figure 4-7 Comparison of measured and simulated angular resolution
Figure 4-8 Photograph of the 1996 CsI detector array
Figure 4-9 Energy resolution of the CsI array
Figure 5-1 The Kinematics of the p ⁺->e⁺ n _e g decay
Figure 5-2 Detector acceptances for radiative pion and muon decay
Figure 5-3 Numerical evaluation of the terms contributing to the p ⁺->e⁺ n _e g decay rate
Figure 6-1 Area layout for the measurements with the LH2 target
Figure 6-2 Picture of the CsI array
Figure 6-3 Trigger logic for the measurement of the Panofsky ratio
Figure 6-4 Kinematics of the charge exchange reaction at rest
Figure 7-1 Pedestals and Noise
Figure 7-2 Evaluation of the noise threshold
Figure 7-3 Typical p ⁰ spectrum (max. in CsI)
Figure 7-4 Typical p ⁰ spectrum (max in NaI)
Figure 7-5 Gain matching progress (peak position)
Figure 7-6 Gain matching progress (accuracy)
Figure 7-7 Comparison of simulation and data for gain matching
Figure 7-8 Position Reconstruction (geometric correction)
Figure 7-9 Reconstruction of the angle of incidence in q and f direction
Figure 7-10 Evaluation of cut on shower losses
Figure 7-11 Shower distribution within the calorimeter and evaluation of a threshold function
Figure 7-12 Overlay of data and simulation.
Figure 7-13 Visualization of the timing cut
Figure 7-14 Result of the timing cut.
Figure 7-15 Photon spectrum of Panofsky ratio measurement superimposed by fit functions
Table 2-1 Classification of b -decays
Table 2-2 Classification of Quarks and Leptons
Table 2-3 p and µ decay modes and probabilities
Table 3-1 Properties of CsI
Table 3-2 Improvements due to optical coating
Table 4-1 Gain matching of simulation
Table 4-2 Summary of the obtained energy resolutions
Table 5-1 Acceptances for radiative pion and muon decay modes
Table 5-2 Listing of the p ⁺->e⁺ n _e runs
Table 5-3 Compilation of measurements of the radiative pion decay rate
Table 7-1 Angular resolutions of NaI-wall and CsI array
Table 7-2 Shower parameters for photons and positrons
Table 7-3 Compilation of all published determinations of the Panofsky ratio