Production of a Dosimetry Cross Section Set Up to 50 MeV

2008 ◽  
pp. 417-417-8 ◽  
Author(s):  
F Maekawa ◽  
U von Möllendorff ◽  
PPH Wilson ◽  
M Wada ◽  
Y Ikeda
Keyword(s):  
Cross Section ◽  
Set Up

On the Influence of the Slot Orifice in Diesel Common Rail Nozzle

2018 ◽  
Vol 11 (1) ◽  
pp. 55-69 ◽  
Author(s):  
Giancarlo Chiatti ◽  
Ornella Chiavola ◽  
Fulvio Palmieri ◽  
Roberto Pompei
Keyword(s):  
Cross Section ◽  
Flow Rate ◽  
Experimental Analysis ◽  
Common Rail ◽  
Spray Angle ◽  
The Novel ◽  
Hydraulic Behavior ◽  
Reference Information ◽  
Light Duty ◽  
Set Up

Background:The paper deals with a diesel common rail nozzle in which a novel orifice layout is implemented.Objective:Its influence on the nozzle mechanical-hydraulic behavior and on the spray shape transient development is experimentally investigated.Methods:In the research, a solenoid injector for light duty diesel engines is equipped with the novel nozzle prototype and tested. The prototype layout is described, pointing out the features of the nozzle orifices, in which a Slot cross-section is adopted; the investigation is accomplished extending the hydraulic tests and the spray visualizations to a reference nozzle with standard holes. The influence of the hole layout on the mechanical-hydraulic behavior of the nozzle is assessed by experimental analysis based on the rate of injection measurement, in comparison with the reference nozzle. Once the hydraulic behavior of the novel nozzle has been characterized in terms of mass flow rate, the slot influence on the spray shape is assessed analyzing the macroscopic features such as the penetration distance and the spray angle, in non evaporative conditions. The study is carried out under transient injection conditions, for different injection pressures, up to 1400 bar.Results:The results on spray characteristics also provide reference information to set up spray models suited to take the Slot orifice into account.

Recent Progress in the 3D Experimentation and Simulation of Nanoindents

2007 ◽  
Vol 550 ◽  
pp. 199-204
Author(s):  
N. Zaafarani ◽  
Franz Roters ◽  
Dierk Raabe
Keyword(s):  
Cross Section ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Physically Based Model ◽  
Rotation Direction ◽  
Crystal Rotation ◽  
Crystal Plasticity Model ◽  
Physically Based ◽  
Set Up ◽  
Rotation Map

This work studies the rotations of a (111) Cu single crystal due to the application of a conical nanoindent. With the aid of a joint high-resolution field emission SEM-EBSD set-up coupled with serial sectioning in a focused ion beam (FIB) system in the form of a cross-beam 3D crystal orientation microscope (3D EBSD) a 3D rotation map underneath the indent could be extracted. When analyzing the rotation directions in the cross section planes (11-2) perpendicular to the (111) surface plane below the indenter tip we observe multiple transition regimes with steep orientation gradients and changes in rotation direction. A phenomenological and a physically-based 3D elastic-viscoplastic crystal plasticity model are implemented in two finite element simulations adopting the geometry and boundary conditions of the experiment. While the phenomenological model predicts the general rotation trend it fails to describe the fine details of the rotation patterning with the frequent changes in sign observed in the experiment. The physically-based model, which is a dislocation density based constitutive model, succeeded to precisely predict the crystal rotation map compared with the experiment. Both simulations over-emphasize the magnitude of the rotation field near the indenter relative to that measured directly below the indenter tip. However, out of the two models the physically-based model reveals better crystal rotation angles

The Effect of the Earth’s Rotation on Laminar Flow in Pipes

1956 ◽  
Vol 23 (1) ◽  
pp. 123-127
Author(s):  
G. S. Benton
Keyword(s):  
Laminar Flow ◽  
Secondary Flow ◽  
Cross Section ◽  
Pipe Flow ◽  
Earth’S Rotation ◽  
Laboratory Studies ◽  
Earth's Rotation ◽  
Parabolic Profile ◽  
Set Up ◽  
Laminar Pipe Flow

Abstract The theory of laminar pipe flow has been developed, retaining the effect of the earth’s rotation. A secondary flow is set up in the pipe cross section which results in distortion of the usual parabolic profile. The distortion may be significant in pipes of moderate diameter. Laboratory studies tend to substantiate these conclusions.

Mechanism Analysis of Magnetostrictive Turning for Piston Skirt Processing

2011 ◽  
Vol 189-193 ◽  
pp. 2134-2138
Author(s):  
Cheng Ying Li ◽  
Jin Zhang ◽  
Wei Wei
Keyword(s):  
Cross Section ◽  
Mechanism Analysis ◽  
Experimental Basis ◽  
Theory Analysis ◽  
Magnetostrictive Material ◽  
Piston Skirt ◽  
Cnc Lathe ◽  
Oval Cross Section ◽  
Set Up ◽  
Magnetostrictive Transducer

The paper presents a turning method by using the magnetostrictive transducer as drive source, this method set up a self-made magnetostrictive tool-post on the CNC lathe. Theoretically, based on the theory analysis of piston skirt varying to oval cross section and middle-convex mold line, this paper expounds the reality of the magnetostrictive turning machining mechanism of middle-convex and varying surface. Experimental results show that this method can not only satisfy the requirements of design, but also simplify workpiece process, establishing theoretical and experimental basis for magnetostrictive material applied to the piston skirt middle-convex and varying surface truning machining.

A relativistic formula for the scattering of mesons under the influence of radiation damping

1943 ◽  
Vol 39 (3) ◽  
pp. 168-172 ◽  
Author(s):  
S. T. Ma
Keyword(s):  
Integral Equation ◽  
Quantum Theory ◽  
Cross Section ◽  
Radiation Damping ◽  
Theoretical Expression ◽  
Free Electrons ◽  
Relativistic Formula ◽  
Complete Detail ◽  
Charged Mesons ◽  
Set Up

It has recently been pointed out by Heitler(1) that the well-known discrepancy between the theoretical expression and the experimental results for the cross-section of scattering of charged mesons by nuclear particles can be removed by a proper consideration of the effect of radiation damping in the quantum theory. The radiation damping in quantum theory was first considered in complete detail for free electrons by Waller(2). A rigorous deduction of the integral equation set up by Waller was given by Heitler on the basis of a method developed by Góra. An alternative rigorous derivation of the integral equation has also been given by Wilson(3). Exact solutions of the integral equation for the simple scattering of mesons by nuclear particles have been found by Heitler in the non-relativistic approximation. An exact solution has not so far been given for physical problems in which the integral equations are complicated, but Wilson has given a general approximate formula for the scattering cross-section, which should be valid for all problems.

Bendable Hexagonal Resonator Designs for Chipless Tag

2016 ◽  
Vol 850 ◽  
pp. 82-87
Author(s):  
Maisarah Abu ◽  
Nur Asyrani Mohd Asari ◽  
Khairul Nabilah Zainul Ariffin ◽  
Nurul Najwa Md Yusof ◽  
Eryana Eiyda Hussin
Keyword(s):  
Dielectric Constant ◽  
Cross Section ◽  
Substrate Thickness ◽  
Network Analyzer ◽  
Horn Antennas ◽  
Rfid Tag ◽  
Chipless Rfid ◽  
Linearly Polarized ◽  
Set Up ◽  
Film Substrate

This paper presented a new design of bendable hexagonal resonator for chipless RFID tag. A linearly polarized plane wave and Radar Cross Section (RCS) probes were used in simulation set-up. The optimized resonator was fabricated on a thin fast-film substrate with dielectric constant, εr=2.7 and substrate thickness, t = 0.13 mm. The fabricated resonator consisted of 3 hexagonal slots which represented three bit 1s. The measurement was performed to validate the designed resonator. It was measured using two transmitting and receiving horn antennas along with the network analyzer. The measured magnitudes were-24.292 dB, -28.854 dB and-32.234 dB.

A Method for Design of Oblique Intersection Beams in Roof Structures

2011 ◽  
Vol 211-212 ◽  
pp. 827-831
Author(s):  
Tao Zhang
Keyword(s):  
Cross Section ◽  
Design Method ◽  
Effective Cross Section ◽  
Vertical Displacement ◽  
Unit Load ◽  
Compatibility Equation ◽  
Unit Load Method ◽  
Beam Section ◽  
Set Up ◽  
Node Position

To facilitate calculation of a reinforced concrete oblique intersection beams in roof structures, the analysis ignores the interaction between moment and torque of node position, assuming the beam ends as hinge supports. Vertical displacement coefficients were found out by unit-load method, the compatibility equation of displacement was set up by the conditions of equal displacement at nodes, which can finally calculate force diagram of beams, and further design beam section. When designing, it is necessary to note reinforcement calculation should be taken into account the change of beam effective cross-section high caused by longitudinal tension reinforcement layer placed. Compared with the engineering example show that the design method is more simple and accurate, the results can provide a reference for the engineering design and related research.

scholarly journals A single-beam photothermal interferometer for in situ measurements of aerosol light absorption

2020 ◽  
Vol 13 (12) ◽  
pp. 7097-7111
Author(s):  
Bradley Visser ◽  
Jannis Röhrbein ◽  
Peter Steigmeier ◽  
Luka Drinovec ◽  
Griša Močnik ◽  
...  
Keyword(s):  
Detection Limit ◽  
Cross Section ◽  
Light Absorption ◽  
Detection Limits ◽  
Field Measurements ◽  
Absorption Cross ◽  
Single Beam ◽  
Dual Beam ◽  
Set Up

Abstract. We have developed a novel single-beam photothermal interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set-up and significantly easier alignment compared to standard dual-beam photothermal interferometers, making it ideal for field measurements. Due to a unique configuration of the reference interferometer arm, light absorption by aerosols can be determined directly – even in the presence of light-absorbing gases. The instrument can be calibrated directly with light-absorbing gases, such as NO2, and can be used to calibrate other light absorption instruments. The detection limits (1σ) for absorption for 10 and 60 s averaging times were determined to be 14.6 and 7.4 Mm−1, respectively, which for a mass absorption cross section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 and 740 ng m−3, respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.

A NEW SET-UP FOR TOTAL REACTION CROSS SECTION MEASURING

Exotic Nuclei ◽  
2013 ◽  
Author(s):  
YU. G. SOBOLEV ◽  
M. P. IVANOV ◽  
A. KUGLER ◽  
YU. E. PENIONZHKEVICH
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Total Reaction Cross Section ◽  
Total Reaction ◽  
Set Up
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