Compton and Rayleigh double scattering of unpolarized radiation

1991 ◽  
Vol 44 (7) ◽  
pp. 4232-4248 ◽  
Author(s):  
J. E. Fernández
Keyword(s):  
Double Scattering ◽  
Unpolarized Radiation

Double Scattering of Electrons with Magnetic Interaction. II. Depolarization

1955 ◽  
Vol 100 (6) ◽  
pp. 1551-1557 ◽  
Author(s):  
H. Mendlowitz ◽  
K. M. Case
Keyword(s):  
Magnetic Interaction ◽  
Double Scattering

Complete determination of polarization state in the hard X-ray region

1991 ◽  
Vol 24 (6) ◽  
pp. 982-986 ◽  
Author(s):  
T. Ishikawa ◽  
K. Hirano ◽  
S. Kikuta
Keyword(s):  
Phase Shift ◽  
Linear Polarization ◽  
Amplitude Ratio ◽  
Polarization State ◽  
Perfect Crystal ◽  
Electric Vector ◽  
X Ray ◽  
Complete Determination ◽  
Unpolarized Radiation

A new method for complete determination of polarization state in the hard X-ray region is described. The system consists of a perfect-crystal phase retarder and a linear polarization analyzer. This method gives not only the amplitude ratio of mutually perpendicular electric vector components and the phase shift between them but also the proportion of unpolarized radiation.

On the double-scattering effect from polycrystals

1977 ◽  
Vol 61 (3) ◽  
pp. 193-194 ◽  
Author(s):  
L.L. Balashova ◽  
E.S. Mashkova ◽  
V.A. Molchanov
Keyword(s):  
Double Scattering ◽  
Scattering Effect

scholarly journals An Integrated Framework Based on Full Monte Carlo Simulations for Double-Scattering Proton Therapy

2019 ◽  
Vol 6 (2) ◽  
pp. 31-41
Author(s):  
Jiankui Yuan ◽  
David Mansur ◽  
Min Yao ◽  
Tithi Biswas ◽  
Yiran Zheng ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Proton Therapy ◽  
Treatment Plan ◽  
Planning System ◽  
Treatment Planning System ◽  
Patient Specific ◽  
Double Scattering ◽  
Integrated Framework ◽  
End To End ◽  
Clinical Cases

ABSTRACT Purpose: We developed an integrated framework that employs a full Monte Carlo (MC) model for treatment-plan simulations of a passive double-scattering proton system. Materials and Methods: We have previously validated a virtual machine source model for full MC proton-dose calculations by comparing the percentage of depth-dose curves, spread-out Bragg peaks, and lateral profiles against measured commissioning data. This study further expanded our previous work by developing an integrate framework that facilitates its clinical use. Specifically, we have (1) constructed patient-specific applicator and compensator numerically from the plan data and incorporated them into the beamline, (2) created the patient anatomy from the computed tomography image and established the transformation between patient and machine coordinate systems, and (3) developed a graphical user interface to ease the whole process from importing the treatment plan in the Digital Imaging and Communications in Medicine format to parallelization of the MC calculations. End-to-end tests were performed to validate the functionality, and 3 clinical cases were used to demonstrate clinical utility of the framework. Results: The end-to-end tests demonstrated that the framework functioned correctly for all tested functionality. Comparisons between the treatment planning system calculations and MC results in 3 clinical cases revealed large dose difference up to 17%, especially in the beam penumbra and near the end of beam range. The discrepancy likely originates from a variety of sources, such as the dose algorithms, modeling of the beamline, and the dose metric. The agreement for other regions was acceptable. Conclusion: An integrated framework was developed for full MC simulations of double-scattering proton therapy. It can be a valuable tool for dose verification and plan evaluation.

scholarly journals Design of 100-MeV proton beam spreading scheme with double-ring double scattering method

2019 ◽  
Vol 68 (5) ◽  
pp. 054104
Author(s):  
Jin-Hua Han ◽  
Gang Guo ◽  
Jian-Cheng Liu ◽  
Li Sui ◽  
Fu-Quan Kong ◽  
...  
Keyword(s):  
Proton Beam ◽  
Scattering Method ◽  
Double Scattering ◽  
Beam Spreading ◽  
Double Ring

scholarly journals Triple-pomeron amplitude in the effective action approach

2020 ◽  
Vol 80 (8) ◽  
Author(s):  
M. A. Braun
Keyword(s):  
Momentum Transfer ◽  
Cross Section ◽  
Imaginary Part ◽  
Effective Action ◽  
High Mass ◽  
Longitudinal Momentum ◽  
Double Scattering ◽  
Composite Target ◽  
Scattering Cross ◽  
Simple Factor

Abstract In the effective action approach the imaginary part of the triple pomeron amplitude is calculated. The found dependence on the longitudinal momentum transfer $$e_{-}$$e- is found to separate as a simple factor $$1/|e_{-}|$$1/|e-|. This result is used to calculate the high-mass diffraction on a hadron and double scattering cross-section off a composite target.

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