scholarly journals Tikhonov regularization modified as improved method for determining electron energy spectra from percentage depth dose curves data of broad beams

2016 ◽  
Author(s):  
Jorge Homero Wilches Visbal ◽  
Alessandro Martins Da Costa
Keyword(s):  
Electron Energy ◽  
Tikhonov Regularization ◽  
Energy Spectra ◽  
Improved Method ◽  
Percentage Depth Dose ◽  
Depth Dose

Precipitating electron energy spectra and auroralpower estimation by incoherent scatter radar with hightemporal resolution

2021 ◽  
Author(s):  
Habtamu W. Tesfaw ◽  
Ilkka I. Virtanen ◽  
Anita T. Aikio ◽  
Amore' Elsje Nel ◽  
Michael Kosch ◽  
...  
Keyword(s):  
Electron Energy ◽  
Energy Spectra ◽  
Incoherent Scatter Radar ◽  
Incoherent Scatter ◽  
Scatter Radar

Percentage depth dose fragmentation for investigating and assessing the photon beam dosimetry quality

2018 ◽  
Vol 18 (03) ◽  
pp. 280-284 ◽  
Author(s):  
Mohamed Bencheikh ◽  
Abdelmajid Maghnouj ◽  
Jaouad Tajmouati
Keyword(s):  
Exponential Decay ◽  
Target Volume ◽  
Photon Beam ◽  
Field Size ◽  
Photon Beams ◽  
Energy Agency ◽  
Percentage Depth Dose ◽  
Depth Dose ◽  
Beam Dosimetry

AbstractAimThe purpose of this study is to introduce a new approach to assess the dosimetry quality of photon beam with energy and irradiation field size. This approach is based on percentage depth dose (PDD) fragmentation for investigating the dosimetry quality.Materials and methodsFor the investigation of the dosimetry quality of 6 and 18 MV photon beams, we have proceeded to fragment the PDD at different field sizes. This approach checks the overall PDD and is not restricted to the exponential decay regions, as per the International Atomic Energy Agency Technical Reports Series No 398 and the American Association of Physicist in Medicine Task Group 51 recommendations.Results and discussionThe 6 MV photon beam deposited more energy in the target volume than the 18 MV photon beam. The dose delivered by the 6 MV beam is greater by a factor of 1·5 than that delivered by the 18 MV beam in the build-up region and the dose delivered by the 6 MV beam is greater by a factor of 2·6 than that delivered by the 18 MV beam in the electronic equilibrium and the exponential decay regions.ConclusionThe dose measured at different points of the beam is higher for 6 MV than for 18 MV photon beam. Therefore, the 6 MV beam is more dosimetrically efficient than the 18 MV beam. Using the proposed approach, we can assess the dosimetry quality by taking into account overall PDD not only in the exponential decay region but also in the field.

scholarly journals The effects of cutouts on output, mean energy and percentage depth dose of 12 and 14 MeV electrons

2011 ◽  
Vol 36 (4) ◽  
pp. 213 ◽  
Author(s):  
Navid Khaledy ◽  
Dariush Sardari ◽  
Azim Arbabi
Keyword(s):  
Percentage Depth Dose ◽  
Depth Dose

scholarly journals Electron Energy Spectra from the Strong-Field Double-Ionization of Xenon

2002 ◽  
Vol 101 (3) ◽  
pp. 337-346 ◽  
Author(s):  
J.L. Chaloupka ◽  
R. Lafon ◽  
J. Rudati ◽  
B. Sheehy ◽  
P. Agostini ◽  
...  
Keyword(s):  
Electron Energy ◽  
Strong Field ◽  
Double Ionization ◽  
Energy Spectra

scholarly journals Applications and benefits of using gradient percentage depth dose instead of percentage depth dose for electron and photon beams in radiotherapy

2021 ◽  
Vol 27 (1) ◽  
pp. 25-29
Author(s):  
Labinot Kastrati ◽  
Gezim Hodolli ◽  
Sehad Kadiri ◽  
Elvin Demirel ◽  
Lutfi Istrefi ◽  
...  
Keyword(s):  
Electron Beams ◽  
Published Data ◽  
Photon Beams ◽  
Data Set ◽  
Percentage Depth Dose ◽  
Depth Dose ◽  
Electron And Photon

Abstract Introduction: The aim of this study is to analyze the gradient of percentage depth dose for photon and electron beams of LINACs and to simplify the data set. Materials and Methods: Dosimetry measurements were performed in accordance with Technical Reports Series No. 398 IAEA. Results and discussion: The gradient of percentage depth dose was calculated and compared with the available published data. Conclusion: Instead of percentage depth dose for increasing and decreasing parts, the findings suggest using only two numbers for specific gradient of dose, separately. In this way, they can replace the whole set of the percentage depth dose (PDD).

scholarly journals Plasma scale-length effects on electron energy spectra in high-irradiance laser plasmas

2016 ◽  
Vol 93 (4) ◽  
Author(s):  
O. Culfa ◽  
G. J. Tallents ◽  
A. K. Rossall ◽  
E. Wagenaars ◽  
C. P. Ridgers ◽  
...  
Keyword(s):  
Electron Energy ◽  
High Irradiance ◽  
Energy Spectra ◽  
Laser Plasmas ◽  
Scale Length ◽  
Length Effects

Continuous electron energy spectra ejected from solid carbon targets bombarded with light and heavy ions

1975 ◽  
Vol 275 (3) ◽  
pp. 229-233 ◽  
Author(s):  
F. Folkmann ◽  
K. O. Groeneveld ◽  
R. Mann ◽  
G. Nolte ◽  
S. Schumann ◽  
...  
Keyword(s):  
Electron Energy ◽  
Heavy Ions ◽  
Energy Spectra ◽  
Solid Carbon
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