Development of a prototype camera and Monte Carlo studies for the optimisation of the CBM-RICH detector / vorgelegt von Jan Martin Kopfer. 2014
Inhalt
- Introduction
- CBM physics motivation and the CBM experiment
- Exploring the phase diagram of nuclear matter
- CBM observables
- Electron pairs from low mass vector meson decays
- The CBM detector
- The CBM-RICH subdetector
- Fundamentals of RICH detectors
- The RICH detector for the CBM experiment
- Ring reconstruction and particle identification
- Feasibility studies
- Evaluation of photomultiplier tubes
- Photomultiplier tubes
- Multianode photomultiplier tubes
- Experimental methods
- Quantum efficiency measurements with continuous light source
- Single photon measurements
- Spatially resolved measurements with pulsed light source
- Quantum efficiency
- Geometrical coverage
- Single photoelectron spectra
- Gain
- Uniformity
- Crosstalk
- Single photon detection efficiency
- Summary
- Wavelength shifting films
- Introduction to WLS films
- Application techniques
- Quantum efficiency
- Evaporated WLS films on PMTs with borosilicate window
- Evaporated WLS film on MAPMT with UV-window
- Dip-coated WLS films on MAPMTs with UV-window and BA photocathode
- Dip-coated WLS films on MAPMTs with UV-window and SBA photocathode
- Improvement of quantum efficiency due to light scattering on the WLS film surface
- Homogeneity
- Crosstalk
- Summary
- RICH prototype beam tests
- The RICH prototype setup
- The RICH prototype camera system
- Experimental setup at CERN
- Data analysis
- Applied cuts and resulting noise
- Ring reconstruction
- External particle identification
- Pixel-by-pixel correction for 2011 data
- Pressure and temperature correction
- Electron pion separation
- Results from the 2011 beam test
- Ring radius and ring centre
- Hit multiplicity
- Dependence of ring radius and hit multiplicity on the refractive index
- Stability of ring radius and hit multiplicity
- Comparison between H8500D-03 and H10996A-103
- Hit multiplicity with and without WLS films
- Electron pion separation
- Results from the 2012 beam test
- Summary
- Implications for Monte Carlo simulations of the RICH performance
- Simulation of the RICH performance with GEANT
- Implementation of realistic input parameters according to laboratory measurements and beam test results
- Verification of Monte Carlo simulations through comparison with beam test results
- Summary
- Conclusion and outlook
- Summary
- Appendices
- Quantum efficiency measurement setup
- Stability of single photon counting measurements
- Single photoelectron spectra
- Simulation parameters
- List of symbols and abbreviations
- References
- Acknowledgement