Measurements of the Ion Transverse Velocity Distribution in the Gap of an Ion Beam Diode

1986 ◽  
Author(s):  
Y. Maron ◽  
M. D. Coleman ◽  
D. A. Hammer ◽  
H. S. Peng
Keyword(s):  
Velocity Distribution ◽  
Ion Beam ◽  
Transverse Velocity

Measurements of ion transverse‐velocity distribution in the gap of an ion‐beam diode

1987 ◽  
Vol 61 (10) ◽  
pp. 4781-4785 ◽  
Author(s):  
Y. Maron ◽  
M. D. Coleman ◽  
D. A. Hammer ◽  
H. S. Peng
Keyword(s):  
Velocity Distribution ◽  
Ion Beam ◽  
Transverse Velocity

scholarly journals The velocity distribution of young radio pulsars: simulating the observations

1996 ◽  
Vol 160 ◽  
pp. 53-54 ◽  
Author(s):  
J.W. Hartman
Keyword(s):  
Magnetic Field ◽  
Velocity Distribution ◽  
Proper Motion ◽  
Transverse Velocity ◽  
Radio Pulsar ◽  
Population Synthesis ◽  
Radio Pulsars ◽  
Full Report ◽  
Simulated Sample

Lyne & Lorimer (1994) argue that the velocities of young pulsars are much higher than was previously thought. However, recent radio pulsar population synthesis work by Hartman et al. (1996, these proceedings) shows that simulations that use a birth velocity distribution with more pulsars at low velocities, Phinney’s modification of the Paczyński (1990) distributiondescribes the observed magnetic field, period and luminosity distribution equally well as simulations that use the Lyne & Lorimer distribution.We use this radio pulsar population synthesis model to obtain the proper motion distribution of the simulated sample, and from that we calculate the transverse velocity distribution to compare it with the observed transverse velocity distribution. A full report of this work will be given in Hartman (1996).

Experimental Characterization of EHD Flow in an Electrostatic Air-Oil Droplets Separator Using Particle Image Velocimetry

2010 ◽  
Author(s):  
Xiangling Kong ◽  
Mohamed Alshehhi ◽  
Afshin Goharzadeh ◽  
Amir Shooshtari ◽  
Serguei Dessiatoun ◽  
...  
Keyword(s):  
Particle Image Velocimetry ◽  
Velocity Distribution ◽  
Particle Image ◽  
Electrostatic Force ◽  
Transverse Velocity ◽  
Inertial Force ◽  
Flow Patterns ◽  
Solid Particles ◽  
Oil Droplets ◽  
Image Velocimetry

In the present work, results of electrohydrodynamic (EHD) flow field in a wire-plate air-oil droplets electrostatic separator under positive polarity are presented. Using Particle Image Velocimetry (PIV), the structure of EHD flow under fully developed primary laminar gas flow is investigated and corresponding flow patterns are studied. Velocity distribution results show that the transverse velocity induced by EHD flow depends significantly on applied voltage and the cross-section plane position of the separator. Detailed transverse velocity distribution profiles under different ratio between electrostatic force and inertial force of droplets (Ehd/Re2) are presented. Oscillating jets are observed under a relatively low Ehd/Re2 ∼ 4 and counter rotating vortices around the wire for large Ehd/Re2 > 90 are characterized in this experiment. Contrary to EHD flow patterns for fine solid particles, no von Karman vortex was observed downstream of the charged electrode wire.

scholarly journals Precision measurement of transverse velocity distribution of a strontium atomic beam

AIP Advances ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 027118 ◽  
Author(s):  
F. Gao ◽  
H. Liu ◽  
P. Xu ◽  
X. Tian ◽  
Y. Wang ◽  
...  
Keyword(s):  
Velocity Distribution ◽  
Precision Measurement ◽  
Atomic Beam ◽  
Transverse Velocity

Transient Change in the Velocity Distribution Functions of Sputtered Atoms during Initial Dose in Ion-Beam Bombardment

1986 ◽  
Vol 25 (Part 2, No. 3) ◽  
pp. L182-L184 ◽  
Author(s):  
Yoshinobu Matsuda ◽  
Chikahisa Honda ◽  
Satoshi Matsubaguchi ◽  
Tadamasa Moroishi ◽  
Katsunori Muraoka ◽  
...  
Keyword(s):  
Velocity Distribution ◽  
Initial Dose ◽  
Ion Beam ◽  
Distribution Functions ◽  
Transient Change ◽  
Velocity Distribution Functions

Towards a precision test of time dilation at high velocityThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.

2009 ◽  
Vol 87 (7) ◽  
pp. 749-756 ◽  
Author(s):  
C. Novotny ◽  
B. Bernhardt ◽  
D. Bing ◽  
G. Ewald ◽  
C. Geppert ◽  
...  
Keyword(s):  
Velocity Distribution ◽  
Signal To Noise Ratio ◽  
Ion Beam ◽  
Double Resonance ◽  
Feasibility Studies ◽  
Time Dilation ◽  
Resonance Spectroscopy ◽  
Atomic Ions ◽  
Doppler Shifts ◽  
Order Of Magnitude

We report on first measurements towards an Ives–Stilwell test of time dilation at velocities around 0.3c. In Ives–Stilwell type experiments, fast atomic ions containing a well-known transition are used as moving clocks, and time dilation as well as the velocity can be derived from the simultaneous laser-spectroscopic measurements of the Doppler shifts with and against the direction of motion. To accurately measure these Doppler shifts, the Doppler broadening caused by the ions velocity distribution needs to be overcome. We performed first feasibility studies for laser spectroscopy on 7Li+ ions in the 2s3S21 metastable ground state at the Gesellschaft für Schwerinonenforschung (GSI) in Darmstadt. The ions were stored in the Experimental Storage Ring (ESR) at a velocity of 0.338c, and optical–optical double-resonance spectroscopy on a closed Λ-type three level system was performed with two lasers propagating antiparallel to the ions motion. We found that Doppler shift measurements on a narrow subclass of the ions velocity distribution with sufficient signal-to-noise ratio are possible if the ion beam is electron-cooled and bunched. Together with the control of systematic error sources developed in our previous experiments on slower beams, the ESR experiment promises an improvement of previously achieved sensitivities to time dilation by about an order of magnitude.

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