An online beam profiler for laser-accelerated protons

2019 ◽  
Vol 90 (5) ◽  
pp. 053307 ◽  
Author(s):  
K. M. Schwind ◽  
E. Aktan ◽  
R. Prasad ◽  
M. Cerchez ◽  
D. Eversheim ◽  
...  
Keyword(s):  
Accelerated Protons

THE EFFECT OF STOCHASTIC RE-ACCELERATION ON THE ENERGY SPECTRUM OF SHOCK-ACCELERATED PROTONS

2014 ◽  
Vol 790 (1) ◽  
pp. 36 ◽  
Author(s):  
Alexandr Afanasiev ◽  
Rami Vainio ◽  
Leon Kocharov
Keyword(s):  
Energy Spectrum ◽  
Accelerated Protons

scholarly journals Dependence of laser accelerated protons on laser energy following the interaction of defocused, intense laser pulses with ultra-thin targets

2011 ◽  
Vol 29 (3) ◽  
pp. 345-351 ◽  
Author(s):  
C.M. Brenner ◽  
J.S. Green ◽  
A.P.L. Robinson ◽  
D.C. Carroll ◽  
B. Dromey ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Focal Spot ◽  
Laser Pulse Energy ◽  
Laser Energy ◽  
Spot Size ◽  
Proton Flux ◽  
Focal Spot Size ◽  
Order Of Magnitude ◽  
Laser Focal Spot ◽  
Accelerated Protons

AbstractThe scaling of the flux and maximum energy of laser-driven sheath-accelerated protons has been investigated as a function of laser pulse energy in the range of 15–380 mJ at intensities of 1016–1018 W/cm2. The pulse duration and target thickness were fixed at 40 fs and 25 nm, respectively, while the laser focal spot size and drive energy were varied. Our results indicate that while the maximum proton energy is dependent on the laser energy and laser spot diameter, the proton flux is primarily related to the laser pulse energy under the conditions studied here. Our measurements show that increasing the laser energy by an order of magnitude results in a more than 500-fold increase in the observed proton flux. Whereas, an order of magnitude increase in the laser intensity generated by decreasing the laser focal spot size, at constant laser energy, gives rise to less than a tenfold increase in observed proton flux.

scholarly journals 67Cu for metabolic studies in milk cows.

1976 ◽  
Vol 24 (3) ◽  
pp. 187-196
Author(s):  
W.T. Binnerts ◽  
J.C. Kapteyn ◽  
L. Lindner
Keyword(s):  
Large Scale ◽  
Acidic Solution ◽  
Scale Production ◽  
Metabolic Studies ◽  
Large Scale Production ◽  
Metabolic Products ◽  
Milk Cows ◽  
Measurable Activity ◽  
Accelerated Protons ◽  
Large Animals

Primarily because of its half-life, the longest-lived radionuclide of copper, 67Cu (half-time 61.7 h), is often the isotope of choice for application in metabolic studies. However, large-scale production of 67Cu is cumbersome. The 67Cu used in this study was produced in a cyclotron by exposing a zinc target to a beam of accelerated protons. Radiochemical purification was achieved by solvent extraction, electroplating and ion-exchange, in that order. The resulting dilute acidic solution contained no measurable activity apart from 67Cu and 64Cu. After the injection in cows, the 64Cu component of the preparation of radiocopper could be used during the first days of the experiment for external radioassay of the liver. The 67Cu could be followed in metabolic products for over 3 weeks. It is concluded that the isotope 67Cu in batches of about 100 mu Ci can very well be used for metabolic excretion studies even on large animals. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Development of a Platform at the Matter in Extreme Conditions End Station for Characterization of Matter Heated by Intense Laser-Accelerated Protons

2020 ◽  
Vol 48 (8) ◽  
pp. 2751-2758
Author(s):  
Krish Bhutwala ◽  
Mathieu Bailly-Grandvaux ◽  
Joohwan Kim ◽  
Maylis Dozieres ◽  
Eric Galtier ◽  
...  
Keyword(s):  
Intense Laser ◽  
Extreme Conditions ◽  
Accelerated Protons

Ring-like spatial distribution of laser accelerated protons in the ultra-high-contrast TNSA-regime

2018 ◽  
Vol 60 (5) ◽  
pp. 055010 ◽  
Author(s):  
G A Becker ◽  
S Tietze ◽  
S Keppler ◽  
J Reislöhner ◽  
J H Bin ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
High Contrast ◽  
Accelerated Protons

SU-GG-T-398: Cellular Radiosensitivity of Laser Accelerated Protons: A Feasibility Study

2008 ◽  
Vol 35 (6Part15) ◽  
pp. 2816-2816 ◽  
Author(s):  
J Fan ◽  
E Fourkal ◽  
A Guemnie Tafo ◽  
I Veltchev ◽  
J Li ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Cellular Radiosensitivity ◽  
Accelerated Protons

scholarly journals Advances in Spectral Distribution Assessment of Laser Accelerated Protons using Multilayer CR-39 Detectors

2019 ◽  
Vol 9 (10) ◽  
pp. 2052 ◽  
Author(s):  
Andreea Groza ◽  
Mihai Serbanescu ◽  
Bogdan Butoi ◽  
Elena Stancu ◽  
Mihai Straticiuc ◽  
...  
Keyword(s):  
Calibration Curve ◽  
Spectral Distribution ◽  
Incident Energy ◽  
Front Side ◽  
Force Microscopy ◽  
Proton Track ◽  
Accelerated Protons ◽  
Cr 39 Detectors ◽  
Track Diameter ◽  
Proton Incident

We show that a spectral distribution of laser-accelerated protons can be extracted by analyzing the proton track diameters observed on the front side of a second CR-39 detector arranged in a stack. The correspondence between the proton track diameter and the incident energy on the second detector is established by knowing that protons with energies only higher than 10.5 MeV can fully deposit their energy in the second CR-39 detector. The correlation between the laser-accelerated proton track diameters observed on the front side of the second CR-39 detector and the proton incident energy on the detector stack is also presented. By calculating the proton number stopped in the CR-39 stack, we find out that its dependence on the proton energy in the 1–15 MeV range presents some discontinuities at energies higher than 9 MeV. Thus, we build a calibration curve of the track diameter as a function of the proton incident energy within the 1–9 MeV range, and we infer the associated analytical function as the calculations performed indicate best results for proton spectra within the 1–9 MeV range. The calibration curve is used as a tool to ascertain the pits identified on the surfaces of both CR-39 detectors to proton tracks. The proton tracks spatial distribution analyzed by optical and atomic force microscopy is correlated with the peculiarity of the used targets.

Effect of Accelerated Protons on the Surface Properties of Polyethylene

2018 ◽  
Vol 52 (4) ◽  
pp. 294-301 ◽  
Author(s):  
S. R. Allayarov ◽  
I. F. Shaimukhametova ◽  
S. A. Bogdanova ◽  
G. P. Belov ◽  
O. N. Golodkov ◽  
...  
Keyword(s):  
Surface Properties ◽  
Accelerated Protons

scholarly journals Ultra-Fast High-Precision Metallic Nanoparticle Synthesis using Laser-Accelerated Protons

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
M. Barberio ◽  
S. Giusepponi ◽  
S. Vallières ◽  
M. Scisció ◽  
M. Celino ◽  
...  
Keyword(s):  
High Precision ◽  
Nanoparticle Synthesis ◽  
Metallic Nanoparticle ◽  
Accelerated Protons
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