Sökning: "Collimation system"

Hittade 4 uppsatser innehållade orden Collimation system.

  1. 1. EVALUATION OF RADIATION DOSES USING CONE BEAM COMPUTED TOMOGRAPHY IN ENDOVASCULAR AORTIC REPAIR AND SCOLIOSIS PROCEDURES

    Master-uppsats,

    Författare :Louise Strandberg; [2021-04-06]
    Nyckelord :Medical physics; Cone beam CT; CT; EVAR; scoliosis; radiation dose; effective dose;

    Sammanfattning : Purpose: The study includes the two areas, vascular surgery and orthopedics, and focuses on endovascular aortic aneurysm repair (EVAR) and scoliosis procedures. EVAR procedures contribute to a high radiation dose to the patient and for scoliosis procedures, it is often young girls that are undergoing surgery. LÄS MER

  3. 2. Conceptual and Detailed Design of the NMX Beam Geometry Conditioning System

    Master-uppsats, Lunds universitet/Hållfasthetslära

    Författare :Niklas Granlund; [2016]
    Nyckelord :ESS; NMX; Collimation system; Neutron; Beam geometry; Technology and Engineering;

    Sammanfattning : The European Spallation Source ERIC is a new neutron spallation source being built in Lund, Sweden, with NMX as one of the pioneer instruments. NMX is a Quasi-Laue single crystal neutron diffractometer for the investigation of large biological molecules. LÄS MER

  4. 3. Investigation of Control Approaches for a High Precision, Piezo-Actuated Rotational Stage

    Master-uppsats, Linköpings universitet/Reglerteknik

    Författare :Niklas Ericson; [2016]
    Nyckelord :Rotational stage; Piezoelectric actuator; Integral resonance control; Adaptive control; External disturbance rejection; Harmonic cancellation;

    Sammanfattning : The Equipment Controls and Electronics section (EN-STI-ECE) at CERN is developing a high precision piezo-actuated rotational stage for the UA9 crystal collimation project. This collaboration is investigating how tiny bent crystals can help to steer particle beams used in modern hadron colliders such as the Large Hadron Collider (LHC). LÄS MER

  5. 4. Collimation technique for HPGe-detector gamma spectrometry in intense radiation fields

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Mattias Jönsson; [2010]
    Nyckelord :Radioekologi; Medicine and Health Sciences;

    Sammanfattning : The aim of this master thesis was to develop a rotation-based collimation system for large coaxial high-purity germanium detectors for use in intense radiation fields. A collimator was constructedformed as a cylinder surrounding the detector, with a 90° slit opening to the detector. LÄS MER