Speaker
Mr
Enrico Ellinger
(Institute for Particle and Astroparticle Physics - University of Wuppertal)
Description
In the Kartin experiment the Forward Beam Monitor Detector is being developed to measure the beta electron spectrum of the electron beam before it enters the main spectrometer. Here a pin diode is used to detect the electrons with an expected high rate of 10^6 1/s mm^2 and low kinetic energies between 0 and 18.6 keV. The high rates cause pile-up effects that lead to unwanted longer dead times of the detector. Furthermore, in the low energy region the electrical noise is the limiting factor (lower limit) for the detectability of the electrons with a satisfactory energy resolution. That is why fast pile-up veto and an efficient amplitude extraction are important for our set-up. Digital pulse processors (like the DP5), using trapezoidal shaping for pulse amplitude extraction, can increase the energy resolution and pulse counting rate. Real and synthesized pulses were produced and processed with the DP5. Noise characteristics can be added to synthesized pulses, yet the true pulse heights remain known. After extracting the pulse height with the DP5 the deviation from the true value can be obtained and be reduced to find the optimal choice of trapezoidal shaping parameters. A brief introduction in pulse processing is given followed by the results of the first investigations.
Primary author
Mr
Enrico Ellinger
(Institute for Particle and Astroparticle Physics - University of Wuppertal)
Co-author
Mr
Uwe Naumann
(Institute for Particle and Astroparticle Physics - University of Wuppertal)
