Essays about: "ionization chamber"

Showing result 1 - 5 of 14 essays containing the words ionization chamber.

  1. 1. Simulation of Detector Response : How Does the Electron Multiplication Differ Within Ionization Chambers with Various Geometries?

    University essay from KTH/Medicinteknik och hälsosystem

    Author : Matilda Messén; Elvira Moser; [2019]
    Keywords : nuclear physics; simulation model; ionization chamber; electron multiplication; Python 3.7; inner radius; anode wire radius; electric field strength; multiplication peak;

    Abstract : This degree project was performed in collaboration with the division of nuclear physics at the department of physics, KTH Royal Institute of Technology. A partial goal of the project was to create a simulation model, where the relationship be- tween the multiplication of electrons that occurs in an ionization chamber and the different pressures of air in the detector could be visualized. READ MORE

  3. 2. Design and Evaluation of a 3D Printed Ionization Chamber

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Caroline Boström; Olivia Messler; [2019]
    Keywords : 3D printing; Ionization chamber; Gas-filled detectors;

    Abstract : Ionizing radiation is often used within medicine for diagnosis and treatments. Because ionizingradiation can be harmful to the body, it is important to know how it affects the tissue. Dosimetryis the study of how ionizing radiation deposits energy in a material. READ MORE

  4. 3. Monte Carlo simulations and measurements of the radiation environment at a laser-plasma accelerator

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Jack Strand Berg; [2016]
    Keywords : Physics and Astronomy;

    Abstract : In current experiments at the high-power laser facility at the Lund Laser Centre, electrons accelerated to hundreds of MeV over short distances by means of laser wakefield acceleration in produced plasmas. To determine the amount of secondary radiation generated when accelerated electrons interact with surrounding materials is of interest to ensure a safe working environment. READ MORE

  5. 4. Validation of the Eclipse(TM) Treatment Planning System for Synchrotron Microbeam Radiotherapy

    University essay from Lunds universitet/Medicinsk strålningsfysik, Lund; Lunds universitet/Sjukhusfysikerutbildningen

    Author : Madeleine Holm; [2016]
    Keywords : Medicine and Health Sciences;

    Abstract : This work presents the first data from a calculation engine for synchrotron Microbeam Radiation Therapy (MRT) implemented in the EclipseTM Treatment Planning System from Varian Medical Services. The calculation engine constitutes a simple pencil beam algorithm estimating ‘peak’ dose and of Monte Carlo simulated Peak Valley Dose Ratios (PVDRs) that are used to obtain ‘valley’ dose. READ MORE

  6. 5. Utilizing statistical process control analysis and EPID for routine QA of medical linear accelerators

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Patrik Andersson; [2011]
    Keywords : Medicine and Health Sciences;

    Abstract : Purpose: The main purposes of this study is to a) evaluate the suitability of a Varian aS1000 EPID as a safe quality assurance device for control of machine specific parameters, such as linac output, beam quality and beam symmetry, and b) to investigate the usefulness of the SPC concept for evaluation of the obtained data. Method and Materials: Measurements were performed using a Varian Clinac 2300iX linear accelerator (Varian, Inc. READ MORE