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Feasibility of producing a short, high energy s-band linear accelerator using a klystron power source
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10.1118/1.4794928
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    Affiliations:
    1 Department of Oncology, Medical Physics Division, University of Alberta, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
    2 Department of Medical Physics, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
    3 Department of Physics, University of Alberta, 11322-89 Avenue, Edmonton, Alberta T6G 2G7, Canada; Department of Medical Physics, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada; and Department of Oncology, Medical Physics Division, University of Alberta, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
    4 Department of Medical Physics, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada and Department of Oncology, Medical Physics Division, University of Alberta, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
    a) Author to whom correspondence should be addressed. Electronic mail: ssteciw@ualberta.ca
    Med. Phys. 40, 041713 (2013); http://dx.doi.org/10.1118/1.4794928
/content/aapm/journal/medphys/40/4/10.1118/1.4794928
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/4/10.1118/1.4794928
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) The peak surface electric fields within the waveguide (solid line) compared with the threshold for breakdown (dashed line), as the first cavity fields are scaled. (b) The beam current striking the target as the first cavity fields are scaled (solid line) compared with the beam current from the magnetron powered (6 MV) waveguide (dashed line).

Image of FIG. 2.
FIG. 2.

Error in the rescaled axial fields compared to the fields obtained by shifting the first coupling cavity, as a percentage of the maximum axial fields. The 0.5 mm coupling cavity shift is shown by the solid line, the 1.5 mm coupling cavity shift is shown by the dashed line.

Image of FIG. 3.
FIG. 3.

(a) The maximum electron energy as the first cavity fields are scaled. (b) The width of the electron energy spectrum (solid line), defined by the energies at which the relative intensity drops to 20% of the maximum, compared with the width of the energy spectrum produced by the magnetron powered (6 MV) waveguide (dashed line).

Image of FIG. 4.
FIG. 4.

(a) The electron energy spectrum produced by the magnetron powered waveguide. (b) The electron energy spectrum produced by the klystron powered waveguide when the first cavity fields are scaled by 0.475.

Image of FIG. 5.
FIG. 5.

PDD produced by our waveguide model with a first cavity scaling factor of 0.475 (solid line) and a PDD measured from a Varian 10 MV linac (dashed line). Normalized to dose at 10 cm depth. Uncertainty in calculated dose is less than 1% at all depths, and 0.2% near dmax. Each PDD was independently scaled in this figure for visual clarity.

Image of FIG. 6.
FIG. 6.

Penumbra of a 10 × 10 cm2 field at 10 cm depth produced by our waveguide model with a first cavity scaling factor of 0.475 (solid line) and produced by published Varian 10 MV linac electron beam parameters (dashed line) (Ref. 18 ). Normalized to central axis dose at 10 cm depth. Uncertainty is less than 0.2% at all points.

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/content/aapm/journal/medphys/40/4/10.1118/1.4794928
2013-03-20
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Feasibility of producing a short, high energy s-band linear accelerator using a klystron power source
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/4/10.1118/1.4794928
10.1118/1.4794928
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