Correction of stopping power and LET quenching for radiophotoluminescent glass dosimetry in a therapeutic proton beam

2017 ◽  
Vol 62 (23) ◽  
pp. 8869-8881 ◽  
Author(s):  
Weishan Chang ◽  
Yusuke Koba ◽  
Tetsurou Katayose ◽  
Keisuke Yasui ◽  
Chihiro Omachi ◽  
...  
Keyword(s):  
Proton Beam ◽  
Stopping Power

scholarly journals A novel range telescope concept for proton CT

2022 ◽  
Author(s):  
Marc Granado-González ◽  
César Jesús-Valls ◽  
Thorsten Lux ◽  
Tony Price ◽  
Federico Sánchez
Keyword(s):  
Computed Tomography ◽  
Proton Beam ◽  
Energy Resolution ◽  
Plastic Scintillator ◽  
Proton Beam Therapy ◽  
Stopping Power ◽  
High Quality ◽  
X Ray ◽  
Proton Computed Tomography ◽  
Clinical Conditions

Abstract Proton beam therapy can potentially offer improved treatment for cancers of the head and neck and in paediatric patients. There has been asharp uptake of proton beam therapy in recent years as improved delivery techniques and patient benefits are observed. However, treatments are currently planned using conventional x-ray CT images due to the absence of devices able to perform high quality proton computed tomography(pCT) under realistic clinical conditions. A new plastic-scintillator-based range telescope concept, named ASTRA, is proposed here to measure the proton’s energy loss in a pCT system. Simulations conducted using GEANT4 yield an expected energy resolution of 0.7%. If calorimetric information is used the energy resolution could be further improved to about 0.5%. In addition, the ability of ASTRA to track multiple protons simultaneously is presented. Due to its fast components, ASTRA is expected to reach unprecedented data collection rates, similar to 10^8 protons/s.The performance of ASTRA has also been tested by simulating the imaging of phantoms. The results show excellent image contrast and relative stopping power reconstruction.

Stopping power of TGS crystals for proton beam at ferro-paraelectric phase transition

2021 ◽  
Author(s):  
Arundhati H. Patil ◽  
S. S. Kulkarni ◽  
Sangshetty Kalyani ◽  
U. V. Khadke
Keyword(s):  
Phase Transition ◽  
Proton Beam ◽  
Paraelectric Phase ◽  
Stopping Power ◽  
Paraelectric Phase Transition

Stopping Power of Proton Beam in a Weakly Non-ideal Xenon Plasma

1999 ◽  
Vol 39 (1-2) ◽  
pp. 45-48 ◽  
Author(s):  
V. Mintsev ◽  
V. Gryaznov ◽  
M. Kulish ◽  
A. Filimonov ◽  
V. Fortov ◽  
...  
Keyword(s):  
Proton Beam ◽  
Stopping Power

Fusion Energy and Stopping Power in a Degenerate DT Pellet Driven by a Laser-Accelerated Proton Beam

2016 ◽  
Vol 65 (6) ◽  
pp. 761-766 ◽  
Author(s):  
M. Mehrangiz ◽  
A. Ghasemizad ◽  
S. Jafari ◽  
B. Khanbabaei
Keyword(s):  
Proton Beam ◽  
Fusion Energy ◽  
Stopping Power

Atomic orientation effects in proton stopping at low velocity

1983 ◽  
Vol 41 ◽  
pp. 708-709
Author(s):  
Kin Lam
Keyword(s):  
Polycrystalline Material ◽  
Charged Particles ◽  
Target Material ◽  
Stopping Power ◽  
Low Velocity ◽  
Electronic Density ◽  
Interatomic Distances ◽  
Frame Work ◽  
Image Position ◽  
Atomic Orientation

The energy of moving ions in solid is dependent on the electronic density as well as the atomic structural properties of the target material. These factors contribute to the observable effects in polycrystalline material using the scanning ion microscope. Here we outline a method to investigate the dependence of low velocity proton stopping on interatomic distances and orientations.The interaction of charged particles with atoms in the frame work of the Fermi gas model was proposed by Lindhard. For a system of atoms, the electronic Lindhard stopping power can be generalized to the formwhere the stopping power function is defined as

Stopping-power determination for compound by EELS

1994 ◽  
Vol 52 ◽  
pp. 948-949 ◽  
Author(s):  
David C. Joy ◽  
Suichu Luo ◽  
John R. Dunlap ◽  
Dick Williams ◽  
Siqi Cao
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Materials Science ◽  
Average Energy ◽  
Stopping Power ◽  
Accurate Information ◽  
Power Calculation ◽  
Coulomb Collisions ◽  
Electron Energy Loss

In Physics, Chemistry, Materials Science, Biology and Medicine, it is very important to have accurate information about the stopping power of various media for electrons, that is the average energy loss per unit pathlength due to inelastic Coulomb collisions with atomic electrons of the specimen along their trajectories. Techniques such as photoemission spectroscopy, Auger electron spectroscopy, and electron energy loss spectroscopy have been used in the measurements of electron-solid interaction. In this paper we present a comprehensive technique which combines experimental and theoretical work to determine the electron stopping power for various materials by electron energy loss spectroscopy (EELS ). As an example, we measured stopping power for Si, C, and their compound SiC. The method, results and discussion are described briefly as below.The stopping power calculation is based on the modified Bethe formula at low energy:where Neff and Ieff are the effective values of the mean ionization potential, and the number of electrons participating in the process respectively. Neff and Ieff can be obtained from the sum rule relations as we discussed before3 using the energy loss function Im(−1/ε).

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