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LUND UNIVERSITY LIBRARIES

Characterisation of the LYCCA Double-Sided Silicon Strip Detectors

Mohamed, Marwan LU (2023) FYSK03 20231
Department of Physics
Particle and nuclear physics
Abstract
The goal of this thesis work is to describe the methods used and perform comprehensive testing of the Double-Sided Silicon-Strip Detectors (DSSD) prior to their implementation in the Lund-York-Cologne CAlorimeter (LYCCA) detector. In the framework of this project, the DSSD characterisation was carried out to ensure specification compliance prior to their "in-kind contribution" delivery to the HISPEC experiment at the NUSTAR collaboration. NUSTAR is one of the four scientific pillars of the future FAIR international accelerator facility currently under construction in Darmstadt, Germany. The main performance parameters obtained were the DSSD's operating voltage, strip-by-strip resolution, leakage current, etc. Two uncollimated alpha... (More)
The goal of this thesis work is to describe the methods used and perform comprehensive testing of the Double-Sided Silicon-Strip Detectors (DSSD) prior to their implementation in the Lund-York-Cologne CAlorimeter (LYCCA) detector. In the framework of this project, the DSSD characterisation was carried out to ensure specification compliance prior to their "in-kind contribution" delivery to the HISPEC experiment at the NUSTAR collaboration. NUSTAR is one of the four scientific pillars of the future FAIR international accelerator facility currently under construction in Darmstadt, Germany. The main performance parameters obtained were the DSSD's operating voltage, strip-by-strip resolution, leakage current, etc. Two uncollimated alpha sources, 244Cm and 148Gd were used for the DSSD testing and performance studies. The energy spectra were measured by the dedicated real time data acquisition system. These spectra were analysed using a Python code to extract the detector’s energy and position resolution. The DSSD's operation voltage and leakage current were obtained from the NIM module used for the detector's high voltage biasing. The intrinsic energy resolution was measured to be approx. 100 keV (FWHM) at 5.797 MeV. The measured resolution is higher than expected for this type of DSSD, which can be partially attributed to the electrical noise, non-uniformity of the dead layer thickness, and non-optimal FPGA-based digital signal processing algorithms. (Less)
Popular Abstract
Detectors in general are incredibly useful for research in nuclear physics as they allow us to observe the decays of unstable particles and their products. The understanding of how these particles decay deepens our theoretical understanding of their structure and how they can be used in many areas such as power production. The Double-Sided Silicon-Strip Detector (DSSD) modules being tested in this thesis will be installed in the Lund-York-Cologne CAlorimeter (LYCCA) setup, which is an essential device that is part of the High-resolution In-flight SPECtroscopy (HISPEC) program in project FAIR. The purpose of LYCCA is to identify exotic nuclei by their physical properties, mainly their mass (proton+neutron) number, A, and proton number Z.... (More)
Detectors in general are incredibly useful for research in nuclear physics as they allow us to observe the decays of unstable particles and their products. The understanding of how these particles decay deepens our theoretical understanding of their structure and how they can be used in many areas such as power production. The Double-Sided Silicon-Strip Detector (DSSD) modules being tested in this thesis will be installed in the Lund-York-Cologne CAlorimeter (LYCCA) setup, which is an essential device that is part of the High-resolution In-flight SPECtroscopy (HISPEC) program in project FAIR. The purpose of LYCCA is to identify exotic nuclei by their physical properties, mainly their mass (proton+neutron) number, A, and proton number Z. The specifications needed to understand how the DSSD modules work are their resolution, operating voltage and hit pattern. This will be done by placing known radiation sources in front of them, leading to the measurement of the radiation emitted. After the collection of the data, it is analysed using specialised Python codes which extracts the parameters of interest.

Delivering these specifications alongside the detectors to project FAIR will allow for enhanced detection and studies of exotic nuclei. This will contribute to answering the most fundamental questions in nuclear physics, such as the limits of the periodic table, and how the nuclear structure evolves with the increase of the number of nucleons (protons or neutrons). Answering these questions won't be done through one single experiment but with the contribution of the experiments conducted using the DSSD modules, we will be closer to answering them. (Less)
Please use this url to cite or link to this publication:
author
Mohamed, Marwan LU
supervisor
organization
course
FYSK03 20231
year
type
M2 - Bachelor Degree
subject
keywords
DSSD LYCCA HISPEC FAIR Characterisation
language
English
id
9125064
date added to LUP
2023-06-14 16:20:53
date last changed
2023-06-14 16:20:53
@misc{9125064,
  abstract     = {{The goal of this thesis work is to describe the methods used and perform comprehensive testing of the Double-Sided Silicon-Strip Detectors (DSSD) prior to their implementation in the Lund-York-Cologne CAlorimeter (LYCCA) detector. In the framework of this project, the DSSD characterisation was carried out to ensure specification compliance prior to their "in-kind contribution" delivery to the HISPEC experiment at the NUSTAR collaboration. NUSTAR is one of the four scientific pillars of the future FAIR international accelerator facility currently under construction in Darmstadt, Germany. The main performance parameters obtained were the DSSD's operating voltage, strip-by-strip resolution, leakage current, etc. Two uncollimated alpha sources, 244Cm and 148Gd were used for the DSSD testing and performance studies. The energy spectra were measured by the dedicated real time data acquisition system. These spectra were analysed using a Python code to extract the detector’s energy and position resolution. The DSSD's operation voltage and leakage current were obtained from the NIM module used for the detector's high voltage biasing. The intrinsic energy resolution was measured to be approx. 100 keV (FWHM) at 5.797 MeV. The measured resolution is higher than expected for this type of DSSD, which can be partially attributed to the electrical noise, non-uniformity of the dead layer thickness, and non-optimal FPGA-based digital signal processing algorithms.}},
  author       = {{Mohamed, Marwan}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Characterisation of the LYCCA Double-Sided Silicon Strip Detectors}},
  year         = {{2023}},
}