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Neutron Reflectometry performed on an Iridium Sample using the Multi-Blade Detector

Backis, Alexander LU (2018) PHYM01 20181
Nuclear physics
Department of Physics
Abstract
The current thesis presents the results from a neutron reflectometry analysis performed on data collected at ISIS in Rutherford Appleton Laboratories, England, in October 2017. The CRISP instrument was used and the Multi-Blade incorporated as a detector. This was the first attempt ever to use the Multi-Blade in this type of measurement. The Multi-Blade is a cold and thermal neutron detector currently in the prototype stage. It will eventually be used for reflectometry measurements at the European Spallation Source. The measurement was performed on a known ~550 Å thick Iridium layer deposited on a Silicon substrate. In the thesis, the collected raw data were processed to form candidate neutron events. This was done by data reduction... (More)
The current thesis presents the results from a neutron reflectometry analysis performed on data collected at ISIS in Rutherford Appleton Laboratories, England, in October 2017. The CRISP instrument was used and the Multi-Blade incorporated as a detector. This was the first attempt ever to use the Multi-Blade in this type of measurement. The Multi-Blade is a cold and thermal neutron detector currently in the prototype stage. It will eventually be used for reflectometry measurements at the European Spallation Source. The measurement was performed on a known ~550 Å thick Iridium layer deposited on a Silicon substrate. In the thesis, the collected raw data were processed to form candidate neutron events. This was done by data reduction followed by clustering. A fitting procedure was then performed on the created candidate events. From this the thickness of the Iridium sample was correctly identified, with a fitting parameter found to be 550 Å +/- 2.75 Å. This demonstrates the capabilities of the Multi-Blade detector to accurately identify thin samples. In the outlook it is discussed how to further increase the accuracy of this result. This can be done by utilizing the high spatial resolution of the Multi-Blade detector. (Less)
Popular Abstract
How do you look at small stuff? Simple: you shoot neutrons at it and look how they bounce! This method can reveal an inner structure of materials unobtainable by any other technique, and it is used in the development of a wide range of products, ranging from hair-products to medicines. The problem is that neutrons are tricky particles: they are difficult to produce and cumbersome to detect. As a solution to these limitations, the new European Spallation Source (ESS) is being constructed in Lund. At this facility, neutrons will be produced at a never before seen pace. This will require a new type of detectors, capable of keeping up with the intense numbers of neutrons bouncing every second. One of these detectors is the Multi-Blade, and it... (More)
How do you look at small stuff? Simple: you shoot neutrons at it and look how they bounce! This method can reveal an inner structure of materials unobtainable by any other technique, and it is used in the development of a wide range of products, ranging from hair-products to medicines. The problem is that neutrons are tricky particles: they are difficult to produce and cumbersome to detect. As a solution to these limitations, the new European Spallation Source (ESS) is being constructed in Lund. At this facility, neutrons will be produced at a never before seen pace. This will require a new type of detectors, capable of keeping up with the intense numbers of neutrons bouncing every second. One of these detectors is the Multi-Blade, and it was the purpose of this thesis to examine if the current prototype works as expected. (Less)
Please use this url to cite or link to this publication:
author
Backis, Alexander LU
supervisor
organization
course
PHYM01 20181
year
type
H2 - Master's Degree (Two Years)
subject
language
English
id
8958156
date added to LUP
2018-09-10 08:46:41
date last changed
2018-09-10 08:46:41
@misc{8958156,
  abstract     = {The current thesis presents the results from a neutron reflectometry analysis performed on data collected at ISIS in Rutherford Appleton Laboratories, England, in October 2017. The CRISP instrument was used and the Multi-Blade incorporated as a detector. This was the first attempt ever to use the Multi-Blade in this type of measurement. The Multi-Blade is a cold and thermal neutron detector currently in the prototype stage. It will eventually be used for reflectometry measurements at the European Spallation Source. The measurement was performed on a known ~550 Å thick Iridium layer deposited on a Silicon substrate. In the thesis, the collected raw data were processed to form candidate neutron events. This was done by data reduction followed by clustering. A fitting procedure was then performed on the created candidate events. From this the thickness of the Iridium sample was correctly identified, with a fitting parameter found to be 550 Å +/- 2.75 Å. This demonstrates the capabilities of the Multi-Blade detector to accurately identify thin samples. In the outlook it is discussed how to further increase the accuracy of this result. This can be done by utilizing the high spatial resolution of the Multi-Blade detector.},
  author       = {Backis, Alexander},
  language     = {eng},
  note         = {Student Paper},
  title        = {Neutron Reflectometry performed on an Iridium Sample using the Multi-Blade Detector},
  year         = {2018},
}