magistrsko delo
Gregor Košir (Author), Matej Lipoglavšek (Mentor), Matjaž Vencelj (Co-mentor)

Abstract

Cilj projekta je optimizacija optoelektričnega zajema s silicijevimi fotopomnoževalkami (SiPM) v scintilacijskem detektorju DEGAS BC BGO, ki bo uporabljen v eksperimentih kolaboracije FAIR/NUSTAR. Scintilacijski kristal je v obliki pravilne šeststrane prizme s krožnim izsekom v enem izmed robov zaradi prostorskih omejitev sistema DEGAS. Pri izdelavi prototipa je bilo potrebno izbrati primeren reflektor in najmanjše zadostno število SiPM, da bo detektor dovolj učinkovito deloval kot generator signala veto za dogodke ozadja in za neelastično sipane žarke gama. Narejene so bile računalniške simulacije v katerih sem preveril različne kombinacije reflektorjev in izbire števila SiPM-jev. Predstavljen je tudi proces izdelave in testiranja prototipa optoelektrične verige, ki vključuje zajem izhodnega signala SiPM in sistem potreben za napajanje tako elektronskih vezij kot fotopomnoževalk.

Keywords

spektroskopija žarkov gama;silicijeve fotopomnoževalke;scintilacijski detektorji;Monte Carlo simulacije;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FMF - Faculty of Mathematics and Physics
Publisher: [G. Košir]
UDC: 539.1
COBISS: 30088451 Link will open in a new window
Views: 383
Downloads: 65
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Other data

Secondary language: English
Secondary title: Optimizing a BGO Scintillation Detector for DEGAS detector array
Secondary abstract: The goal of this project is to optimize the DEGAS BGO scintillation detector with silicon photomultipliers (SiPM), to be used in experiments by the FAIR/NUSTAR collaboration. The scintillation crystal is in the shape of a hexagonal prism with one of the corners cylindrically cut from the rest of the crytal, due to spatial limitations of the DEGAS detector array. During the prototype design, an apropriate reflector foil and the lowest sufficient number of SiPMs needed to be selected for the detector to properly function in veto mode for background events and Compton scattered gamma rays. For that purpose I made computer simulations with various combinations of reflectors and numbers of SiPMs. The process used to design and test the readout, biasing and power supply electronics is described and at the end some first measurements are presented.
Secondary keywords: gamma-ray spectroscopy;silicon photomultipliers;scintillation detectors;Monte Carlo simulations;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za matematiko in fiziko, Oddelek za fiziko
Pages: 56 str.
ID: 12039025