scholarly journals Interplay between radiation pressure force and scattered light intensity in the cooperative scattering by cold atoms

2013 ◽  
Vol 61 (1) ◽  
pp. 18-24 ◽  
Author(s):  
T. Bienaimé ◽  
R. Bachelard ◽  
J. Chabé ◽  
M.T. Rouabah ◽  
L. Bellando ◽  
...  
Keyword(s):  
Light Intensity ◽  
Radiation Pressure ◽  
Cold Atoms ◽  
Scattered Light ◽  
Scattered Light Intensity ◽  
Pressure Force ◽  
Radiation Pressure Force

scholarly journals Laser-induced vibration of a thin soap film

Lab on a Chip ◽  
2014 ◽  
Vol 14 (18) ◽  
pp. 3525-3529 ◽  
Author(s):  
Olivier Emile ◽  
Janine Emile
Keyword(s):  
Radiation Pressure ◽  
Optical Radiation ◽  
Soap Film ◽  
Pressure Force ◽  
Radiation Pressure Force

We report on the vibration of a thin soap film based on the optical radiation pressure force.

scholarly journals Planar droplet sizing: Application to a spray of Jet A1 kerosene

2017 ◽  
Author(s):  
Pierre Doublet ◽  
Christine Lempereur ◽  
Virginel Bodoc ◽  
Mikael Orain ◽  
Pierre Gajan
Keyword(s):  
Light Intensity ◽  
Scattered Light ◽  
Droplet Surface ◽  
Scattered Light Intensity ◽  
Field Of View ◽  
Fluorescence Signal ◽  
Droplet Volume ◽  
Image Processing Algorithm ◽  
Two Phase ◽  
Scattering Angle

Optical techniques are  widely employed for their non-intrusive behavior and are applied to two-phase flowinvestigations. Until now, the most commonly used technique to determine the droplet size is the Phase Doppler Anemogranulometry, although it is time consuming for an overall injector characterization. An imaging technique called Planar Droplet Sizing has been used to offer an alternative and provide a spatially-resolved 2D map of the Sauter Mean Diameter (SMD). The measurement is based on the ratio between laser-induced fluorescence and scattered light intensities which are assumed to be proportional respectively to the droplet volume and droplet surface area. However, previous studies revealed that the dependence of fluorescence intensity on the droplet volume can be altered by the absorption of light in the liquid. The scattered light intensity depends on the scattering angle and intensity variations within the field of view must be avoided.The aim of this study is to make the PDS technique operational for a Jet A-1 kerosene spray. A strong absorption of liquid kerosene appears under UV excitation at 266 nm making the technique unsuitable. Under visible excitation at 532 nm, a fluorescent tracer (Pyrromethene 597) must be added to the kerosene to enhance the fluorescence signal. To prevent scattered light intensity variations within the field of view, an optimal scattering angle close to 115° is required. An image processing algorithm is proposed in order to reduce the effects ofmultiple scattering.DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4698

scholarly journals Method for the Determination of Density and Phase Functions of Interplanetary Dust

1980 ◽  
Vol 90 ◽  
pp. 55-60
Author(s):  
A. Mujica ◽  
G. Lôpez ◽  
F. Sánchez
Keyword(s):  
Light Intensity ◽  
Unit Volume ◽  
Interplanetary Space ◽  
Scattered Light ◽  
Interplanetary Dust ◽  
Scattered Light Intensity ◽  
Zodiacal Light ◽  
Method Of Determination ◽  
Phase Functions

SummaryA method of determination of the scattered light intensity, , by a unit-volume of interplanetary space is presented. From ground base Zodiacal Light measurements and the experimental results of Pioneer X the density, ρ(r), and phase, σ(θ), functions are obtained without any previous assumptions about them.

scholarly journals Observations of X-Ray Radiation Pressure Force Using High-Speed Diffracted X-Ray Tracking

2011 ◽  
Vol 100 (3) ◽  
pp. 312a
Author(s):  
Yuji C. Sasaki ◽  
Yasuhito Suzuki ◽  
Hiroshi Sekiguchi ◽  
Noboru Ohta ◽  
Tatsuhito Mastuo ◽  
...  
Keyword(s):  
Radiation Pressure ◽  
High Speed ◽  
Pressure Force ◽  
X Ray ◽  
Radiation Pressure Force

Correlation between Powder in the Plasma and Stability of High Rate Deposited a-Si:H

2005 ◽  
Vol 862 ◽  
Author(s):  
Guozhen Yue ◽  
Gautam Ganguly ◽  
Baojie Yan ◽  
Jeffrey Yang ◽  
Subhendu Guha
Keyword(s):  
Solar Cells ◽  
Light Intensity ◽  
Scattered Light ◽  
Scattered Light Intensity ◽  
High Rate ◽  
Invasive Technique ◽  
High Deposition Rate ◽  
Very High Frequency ◽  
Silicon Photodiode ◽  
Non Invasive

AbstractHydrogenated amorphous silicon (a-Si:H) solar cells incorporating high deposition rate (8-10Å/s) intrinsic layers were deposited using modified very high frequency (MVHF) plasma. We have monitored the light scattered from powder generated in the plasma using an Ar-laser and a silicon photodiode. This simple, non-invasive technique allows us to make measurements on the same reactor used to make the solar cells. First, we have varied the total flow rate and observed a maximum in the scattered light intensity from powder in the plasma during the deposition of the intrinsic layer, and correlated this with the degradation, as well as the stabilized performance of the solar cells. Then, we have studied the effects of varying the deposition temperature and/or the addition of germane to the gas mixture on the scattered light intensity due to powder in the plasma.

scholarly journals Long Dust Trails of Short Period Comets

1991 ◽  
Vol 126 ◽  
pp. 229-234
Author(s):  
H.U. Keller ◽  
K. Richter
Keyword(s):  
Radiation Pressure ◽  
Dust Cloud ◽  
Dust Particles ◽  
Pressure Force ◽  
Meteor Streams ◽  
Short Period ◽  
Orbital Periods ◽  
Comet Halley ◽  
Observational Techniques ◽  
Radiation Pressure Force

Comets constitute an important source for the zodiacal dust cloud. Mainly large particles are contributed because the smaller particles are emitted into hyperbolic orbits relative to the sun. Radiation pressure force reduces the effective solar gravitational attraction. Information about large cometary particles can be derived from a variety of sources requiring quite different observational techniques. Many distinct meteor streams are connected to orbits of short period comets. These streams contain large dust particles that are very little influenced by radiation pressure force. In some cases such as the η Aquarids and Orionids connected to comet Halley the total mass and the age of the meteors have been derived (Hughes, 1987; Hajduk, 1987). The mass of the streams is 5 to 10 times larger than the present mass of the nucleus and their lifetime corresponds to 2000 to 3000 orbital periods. Visible meteors are typically 10−2g and more of centimetre size.

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