Silicon Strip Module Quality Control and Test Beam for the ATLAS Inner Tracker
(2024) FYSK04 20241Department of Physics
Particle and nuclear physics
- Abstract
- The Large Hadron Collider (LHC) at CERN is undergoing a major upgrade to prepare for the High-Luminosity LHC. It will allow for many more particle collisions to occur. Some detectors that make up the LHC experiments must be replaced to withstand the harsher conditions.
In particular, the inner tracking detector (ID) of the ATLAS experiment will be replaced by the new Inner Tracker (ITk). Every component that makes up the final project must work to its fullest capacity, which is why quality control plays a vital role in preparing for the upgrade.
Half of this project will focus on analysing a series of electrical tests performed on different modules, the basic components of the ITk Strip system. By analysing Response Curves for... (More) - The Large Hadron Collider (LHC) at CERN is undergoing a major upgrade to prepare for the High-Luminosity LHC. It will allow for many more particle collisions to occur. Some detectors that make up the LHC experiments must be replaced to withstand the harsher conditions.
In particular, the inner tracking detector (ID) of the ATLAS experiment will be replaced by the new Inner Tracker (ITk). Every component that makes up the final project must work to its fullest capacity, which is why quality control plays a vital role in preparing for the upgrade.
Half of this project will focus on analysing a series of electrical tests performed on different modules, the basic components of the ITk Strip system. By analysing Response Curves for several modules, taken during thermal cycling, strips with noise and gain values outside the required window can be identified. IV curves are also presented and analysed. The results show normal noise and gain values for the modules tested, but some unusual behaviour in the IV-curves. These results serve as a base for future work with these modules and further characterization of their performance as detectors.
The second half of the project will be based on the March 2024 DESY Test Beam, where modules were tested in a 5 GeV electron beam. As a follow-up on the test beam week, I worked on plotting the efficiencies of a module to discover its operating window. The module analysed had ``cold noise" and the influence this phenomenon has on the operating window is discussed. (Less) - Popular Abstract
- What particles make up the cosmos? What is dark matter How do nature's forces interact with each other? These are just a few of the questions that can be investigated using the particle detector ATLAS, located at the world-leading research centre, CERN. Here, particles such as protons are accelerated in the Large Hadron Collider (LHC) and made to collide in detectors, such as ATLAS. The outcome of these collisions is then studied to answer the fundamental questions of the universe.
The LHC is going through a major upgrade to become the HL- (high-luminosity) LHC, allowing for ten times more particle collisions t a time. This means the amount of data collected will increase substantially, allowing for faster potential scientific... (More) - What particles make up the cosmos? What is dark matter How do nature's forces interact with each other? These are just a few of the questions that can be investigated using the particle detector ATLAS, located at the world-leading research centre, CERN. Here, particles such as protons are accelerated in the Large Hadron Collider (LHC) and made to collide in detectors, such as ATLAS. The outcome of these collisions is then studied to answer the fundamental questions of the universe.
The LHC is going through a major upgrade to become the HL- (high-luminosity) LHC, allowing for ten times more particle collisions t a time. This means the amount of data collected will increase substantially, allowing for faster potential scientific discoveries. This upgrade will lead to much harsher radiation conditions, and the ATLAS experiment is facing a total makeover to prepare for it. This thesis focuses on analysing the electrical tests that are done on the new sub-detectors, to ensure their optimal performance.
The ATLAS detector consists of many layers responsible for detecting different types of particles, but this project will focus on the innermost layer. After the upgrade, this layer will be called the ATLAS Inner Tracker, or ITk. This silicon detector will measure the direction, momentum and charge of electrically charged particles produced in each collision. It will be more radiation resistant and have a higher resolution than the current inner tracking detector. The ITk is divided into two parts; the Pixel system and the Strip system (the latter relevant to this project).
The building blocks of the strips are known as modules, which are sub-detectors on which we run tests to evaluate their behaviour and performance.
Some tests are done by injecting small amounts of electrical charge into the module and seeing how it responds. Other tests can be done using real particles that are shot at the modules, known as a test beam, to simulate conditions in the actual detector. Modules' responses from both testing methods were analysed in this thesis and conclusions were drawn regarding the functioning of these modules.
In sum, testing particle detectors is an essential step to guarantee the best results once they are put into action. We are approaching an incredibly exciting period for Particle Physics and many fascinating discoveries are sure to come from this upgrade. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9165813
- author
- Murphy, Alexandra LU
- supervisor
-
- Hannah Herde LU
- Sten Åstrand LU
- Erik Wallin LU
- organization
- course
- FYSK04 20241
- year
- 2024
- type
- M2 - Bachelor Degree
- subject
- language
- English
- id
- 9165813
- date added to LUP
- 2024-06-20 11:38:12
- date last changed
- 2024-06-20 11:38:12
@misc{9165813,
abstract = {{The Large Hadron Collider (LHC) at CERN is undergoing a major upgrade to prepare for the High-Luminosity LHC. It will allow for many more particle collisions to occur. Some detectors that make up the LHC experiments must be replaced to withstand the harsher conditions.
In particular, the inner tracking detector (ID) of the ATLAS experiment will be replaced by the new Inner Tracker (ITk). Every component that makes up the final project must work to its fullest capacity, which is why quality control plays a vital role in preparing for the upgrade.
Half of this project will focus on analysing a series of electrical tests performed on different modules, the basic components of the ITk Strip system. By analysing Response Curves for several modules, taken during thermal cycling, strips with noise and gain values outside the required window can be identified. IV curves are also presented and analysed. The results show normal noise and gain values for the modules tested, but some unusual behaviour in the IV-curves. These results serve as a base for future work with these modules and further characterization of their performance as detectors.
The second half of the project will be based on the March 2024 DESY Test Beam, where modules were tested in a 5 GeV electron beam. As a follow-up on the test beam week, I worked on plotting the efficiencies of a module to discover its operating window. The module analysed had ``cold noise" and the influence this phenomenon has on the operating window is discussed.}},
author = {{Murphy, Alexandra}},
language = {{eng}},
note = {{Student Paper}},
title = {{Silicon Strip Module Quality Control and Test Beam for the ATLAS Inner Tracker}},
year = {{2024}},
}