Table 1.
Explanation of the different proton nozzles at SMC.
Fig 1.
Schematic of SMC proton therapy facility.
Fig 2.
Design of each scanning nozzle using Monte Carlo simulation FLUKA.
Fig 3.
Feature of the WENDI-2 detector and its Schematic modeled in Monte Carlo simulation.
(Left) The WENDI-2 neutron detector used for measurement of secondary neutron flux (Thermo Scientific), (Right) Schematic of the WENDI-2 detector structure that modeled in FLUKA simulation.
Fig 4.
Parameters for data analysis of beam properties.
Fig 5.
Experiment equipment to obtain proton beam properties.
(Left) Installation of the ion chamber on the patient table to measure the Bragg peak, R90, R10 and distal fall-off (Zebra multi-layer ion chamber, IBA Inc.), (Right) Installation of the ion chamber in the water phantom for beam spot size measurement.
Fig 6.
Measurement of secondary neutrons in each gantry by FLUKA.
Fig 7.
WENDI-2 detector location for secondary neutron dose measurement.
x-axis offset of (A) 44.29 cm, (B) 16.43 cm, (C) -16.43 cm and (D) -44.29 cm, respectively.
Fig 8.
Gantry 1 results: 1) Bragg peak, 2) R90, 3) R10, and 4) distal fall-off.
Fig 9.
Gantry 2 results: 1) Bragg peak, 2) R90, 3) R10, and 4) distal fall-off.
Fig 10.
Results from Gantries 1(Left) and 2(Right) of FWHM of beam spot size.
Fig 11.
Normalized secondary neutron dose from 110 MeV proton beam at Gantries 1 and 2 from Monte Carlo simulation.
Fig 12.
Normalized secondary neutron dose from 190 MeV proton beam at Gantries 1 and 2 from Monte Carlo simulation.
Fig 13.
Comparison of simulated and experimentally measured values of normalized.