Sökning: "beam scanning"

Visar resultat 16 - 20 av 70 uppsatser innehållade orden beam scanning.

  1. 16. Dual-polarized geodesic lens in sub-THz

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Wenfu Fu; [2022]
    Nyckelord :beam scanning; dual polarization; fully metallic; geodesic lens; Luneburg lens antenna; THz; strålskanning; korspolarisering; fullt metallisk; geodetisk lins; Luneburg linsantenn; THz;

    Sammanfattning : In the sub-THz frequency range, the geodesic lens can realize low losses and beam scanning capability with high gain and high aperture efficiency due to its fully metallic property and rotational symmetry. Therefore, in high-frequency applications, a geodesic lens is considered a more promising solution in comparison to phased arrays or other beamforming techniques. LÄS MER

  3. 17. Breathing Effects in Proton Scanning for Hodgkin's Lymphoma

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :John Nilsson; [2022]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Purpose/Background Proton beam scanning (PBS) for mediastinal Hodgkin's Lymphoma (HL) is limited when treating in free-breathing (FB) due to breathing motion in the thoracic region. Tumour motion and the time structure of the beam delivery will cause interplay and dose blurring effects, resulting in discrepancies of dose in the planned dose distribution both inside and at the edges of tumour volume (TV). LÄS MER

  4. 18. Broad ion beam cross-sectioning, microscopy, and image analysis of battery electrode morphology

    Master-uppsats, Lunds universitet/Industriell Produktion

    Författare :Aamer Mohammed Saleem Siddiqui; [2022]
    Nyckelord :BIB; SEM; Li Plating; Particle cracking; Tortuosity; Image analysis; Technology and Engineering;

    Sammanfattning : Lithium-ion batteries (LiB) are witnessing an increasing demand for electric vehicles. It provides a sustainable energy storage solution that is more efficient and ecofriendly than the fossil fuels. LÄS MER

  5. 19. Melt pool Geometry and Microstructure Characterization in Additively Manufactured WE43 Alloy

    Master-uppsats, Uppsala universitet/Institutionen för materialvetenskap

    Författare :Satya Chaitanya Vaddamanu; [2022]
    Nyckelord :;

    Sammanfattning : Mg-RE based alloys have exhibited promising properties in application for biodegradable implants. This work provides a systematic study on the characterization of melt pool geometry and profile for one such alloy, WE43. LÄS MER

  7. 20. Scenario Dose Calculation for Robust Optimization in Proton Therapy Treatment Planning

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Johan Sundström; [2021]
    Nyckelord :cancer; radiation therapy; proton therapy; treatment planning; robust optimization; dose calculation algorithms; scenarios; patient setup; range error; organ motion; pencil beam scanning; computational efficiency; range-corrected dose-mapping; Mathematics and Statistics;

    Sammanfattning : Robust optimization plays a vital role in proton therapy treatment planning. A monoenergetic beam of protons has a finite range and delivers most of its dose at some specific depth in the patient. This allows the design of treatments that mainly damage the tumor and not any surrounding tissue. LÄS MER