Feasibility of producing a short, high energy s‐band linear accelerator using a klystron power source

Abstract

The authors' simulation results show that a short, high-energy, s-band accelerator is feasible and electric breakdown is not expected to interfere with operation at these field strengths. With minor modifications to the first coupling cavity, all electron beam parameters are improved.

Performance of a clinical gridded electron gun in magnetic fields: Implications for MRI‐linac therapy

“…Multimode electron accelerators are a current area of research for MRI-linacs. 14,15 Of the major manufactures, Tomotherapy, Cyber-Knife, and Siemens all utilize gridded guns. Varian uses gridded guns on multimode systems, and diode guns on low energy guides.…”

“…Although the MRI-linac devices investigated in the published literature to date appear to utilize diode electron guns, [11][12][13] recent publications have focused on the potential of multimode MRI-linac devices to improve achievable dose distributions for deep seated tumors, 14,15 and beam gating using MRI-linacs. 16,17 As such, it is clear that triode electron guns are likely to find useful application in the next generation of MRI-linac systems.…”

FEM design and simulation of a short, 10 MV, S‐band Linac with Monte Carlo dose simulations

“…The port dimensions were unchanged from the previous work, 17.1 × 23.5 mm with 3.4 mm radius of curvature on the corner. 10 F. 2.…”

“…A 10 MV Linac head (target, primary collimator, flattening filter, monitor chamber, mirror, and jaws) was simulated in BEAMnrc following Varian specifications, 22 and the electron phase spaces produced by PARMELA were converted to an input phase space and used as input. 10 For each coupling cavity shift, three field sizes were simulated: 4 × 4, 10 × 10, and 20 × 20 cm, producing three phase spaces for input into DOSXYZnrc. DOSXYZnrc was then used to calculate depth dose curves and beam penumbras for each shift and field size.…”

“…The depth dose curves were calculated with voxel sizes of 5 × 5 × 1 mm for the first 3.5 cm depth and 5 × 5 × 5 mm until 30 cm depth, with the phantom modeled to 40 cm depth to ensure accurate backscatter. As in our previous work, 10 we used 100 × 10 6 histories for the BEAMnrc simulations and 15 × 10 9 for the DOSXYZnrc simulations. For comparison purposes, the BEAMnrc and DOSXYZnrc simulations were repeated using the Varian 10 MV electron beam properties from Sheik-Bagheri and Rogers.…”