New Method of Laser Beam Energy Distribution Evaluation in Biological Tissue Based on Wavelet Analysis

2007 ◽  
Author(s):  
A. Zajac ◽  
L. Urbanski ◽  
D. Podniesinski ◽  
J. Swiderski
Keyword(s):  
Wavelet Analysis ◽  
Laser Beam ◽  
Energy Distribution ◽  
Biological Tissue ◽  
Beam Energy ◽  
New Method

scholarly journals PROMPT BETA SPECTROSCOPY AS A DIAGNOSTIC FOR MIX IN IGNITED NIF CAPSULES

2006 ◽  
Vol 21 (13) ◽  
pp. 1029-1040 ◽  
Author(s):  
A. C. HAYES ◽  
GERARD JUNGMAN ◽  
J. C. SOLEM ◽  
P. A. BRADLEY ◽  
R. S. RUNDBERG
Keyword(s):  
Laser Beam ◽  
Beam Energy ◽  
High Energy ◽  
Shell Material ◽  
National Ignition Facility ◽  
Confinement Fusion ◽  
Order Of Magnitude ◽  
Beta Spectroscopy ◽  
Fundamental Physical ◽  
Beta Emission

The National Ignition Facility (NIF) technology is designed to drive deuterium–tritium (DT) internal confinement fusion (ICF) targets to ignition using indirect radiation from laser beam energy captured in a hohlraum. Hydrodynamical instabilities at interfaces in the ICF capsule leading to mix between the DT fuel and the ablator shell material are of fundamental physical interest and can affect the performance characteristics of the capsule. Here we describe new radiochemical diagnostics for mix processes in ICF capsules with plastic or Be (0.9% Cu ) ablator shells. Reactions of high-energy tritons with shell material produce high-energy β-emitters. We show that mix between the DT fuel and the shell material enhances high-energy prompt beta emission from these reactions by more than an order of magnitude over that expected in the absence of mix. We further show how a mix signal could be detectable in an ignition failure regime corresponding to yields greater than about 2 kJ.

Time resolved diagnostic of ion beam energy distribution function for plasma thrusters

1997 ◽  
Author(s):  
Christelle Philippe ◽  
Claude Laure ◽  
Andre Bouchoule ◽  
Christelle Philippe ◽  
Claude Laure ◽  
...  
Keyword(s):  
Distribution Function ◽  
Energy Distribution ◽  
Beam Energy ◽  
Ion Beam ◽  
Energy Distribution Function ◽  
Time Resolved ◽  
Plasma Thrusters

scholarly journals Laser-Beam Zooming to Mitigate Crossed-Beam Energy Losses in Direct-Drive Implosions

2013 ◽  
Vol 110 (14) ◽  
Author(s):  
I. V. Igumenshchev ◽  
D. H. Froula ◽  
D. H. Edgell ◽  
V. N. Goncharov ◽  
T. J. Kessler ◽  
...  
Keyword(s):  
Laser Beam ◽  
Beam Energy ◽  
Energy Losses ◽  
Direct Drive

New method for determination of energy distribution of surface states in the semiconductor band-gap: XPS measurements under biases

1994 ◽  
Vol 92 (3) ◽  
pp. 249-254 ◽  
Author(s):  
Hikaru Kobayashi ◽  
Toshio Mori ◽  
Kenji Namba ◽  
Yoshihiro Nakato
Keyword(s):  
Energy Distribution ◽  
Band Gap ◽  
Surface States ◽  
New Method

scholarly journals Laser beam energy dependence of martensitic transformation in SLM fabricated NiTi shape memory alloy

Materialia ◽  
2019 ◽  
Vol 6 ◽  
pp. 100305 ◽  
Author(s):  
Y. Yang ◽  
J.B. Zhan ◽  
B. Li ◽  
J.X. Lin ◽  
J.J. Gao ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Laser Beam ◽  
Shape Memory ◽  
Energy Dependence ◽  
Beam Energy ◽  
Niti Shape Memory Alloy

scholarly journals Measurement of the Beam Energy Distribution of a Medical Cyclotron with a Multi-Leaf Faraday Cup

Instruments ◽  
2019 ◽  
Vol 3 (1) ◽  
pp. 4 ◽  
Author(s):  
Konrad P. Nesteruk ◽  
Luca Ramseyer ◽  
Tommaso S. Carzaniga ◽  
Saverio Braccini
Keyword(s):  
Energy Distribution ◽  
Beam Energy ◽  
University Hospital ◽  
Stopping Power ◽  
Particle Accelerators ◽  
Faraday Cup ◽  
Range Distribution ◽  
Accurate Knowledge ◽  
Thin Aluminum ◽  
Design Construction

Accurate knowledge of the beam energy distribution is crucial for particle accelerators, compact medical cyclotrons for the production of radioisotopes in particular. For this purpose, a compact instrument was developed, based on a multi-leaf Faraday cup made of thin aluminum foils interleaved with plastic absorbers. The protons stopping in the aluminum foils produce a measurable current that is used to determine the range distribution of the proton beam. On the basis of the proton range distribution, the beam energy distribution is assessed by means of stopping-power Monte Carlo simulations. In this paper, we report on the design, construction, and testing of this apparatus, as well as on the first measurements performed with the IBA Cyclone 18-MeV medical cyclotron in operation at the Bern University Hospital.

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