Broadband continuous wave source localization via pair‐wise, cochleagram processing

2005 ◽  
Vol 117 (4) ◽  
pp. 2463-2463
Author(s):  
Eva‐Marie Nosal ◽  
L. Neil Frazer
Keyword(s):  
Source Localization ◽  
Continuous Wave ◽  
Wave Source

scholarly journals Dynamical theory calculations of spin-echo resolved grazing-incidence scattering from a diffraction grating

2010 ◽  
Vol 43 (3) ◽  
pp. 455-465 ◽  
Author(s):  
Rana Ashkar ◽  
P. Stonaha ◽  
A. L. Washington ◽  
V. R. Shah ◽  
M. R. Fitzsimmons ◽  
...  
Keyword(s):  
Diffraction Grating ◽  
Continuous Wave ◽  
Spin Echo ◽  
Grazing Incidence ◽  
Grating Period ◽  
Dynamical Theory ◽  
Neutron Spin ◽  
Wave Source ◽  
Rectangular Profile ◽  
Good Account

Neutrons scattered or reflected from a diffraction grating are subject to a periodic potential analogous to the potential experienced by electrons within a crystal. Hence, the wavefunction of the neutrons can be expanded in terms of Bloch waves and a dynamical theory can be applied to interpret the scattering phenomenon. In this paper, a dynamical theory is used to calculate the results of neutron spin-echo resolved grazing-incidence scattering (SERGIS) from a silicon diffraction grating with a rectangular profile. The calculations are compared with SERGIS measurements made on the same grating at two neutron sources: a pulsed source and a continuous wave source. In both cases, the spin-echo polarization, studied as a function of the spin-echo length, peaks at integer multiples of the grating period but there are some differences between the two sets of data. The dynamical theory explains the differences and gives a good account of both sets of results.

Continuously Tuneable, Quasi-Continuous-Wave Source for Ultraviolet Resonance Raman Spectroscopy

1995 ◽  
Vol 49 (2) ◽  
pp. 247-252 ◽  
Author(s):  
Stephen J. Doig ◽  
Franklyn G. Prendergast
Keyword(s):  
Raman Spectroscopy ◽  
Continuous Wave ◽  
Uv Light ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Laser Source ◽  
Ultraviolet Region ◽  
Wave Source ◽  
The Third ◽  
Ultraviolet Resonance Raman

A continuously tuneable, quasi-continuous-wave (cw), ultraviolet source for resonance Raman spectroscopy has been developed. The third and fourth harmonics of a picosecond mode-locked titanium: sapphire laser were generated in nonlinear crystals. The pulses which resulted from these processes were spectrally narrow (10–15 cm−1) and had low peak powers (<1 kW), while the system as a whole provides high average powers. Fourth-harmonic wavelengths were generated from 208 to 230 nm with average powers from 15 to 40 mW, while the third harmonic ranged from 255 to 305 nm with over 90 mW of power. The UV light was well collimated and focused well, and the power was stable for hours. Resonance Raman spectra of tryptophan and phenylalanine were recorded to demonstrate the practical application of this system. Spectra with excellent signal-to-noise ratios were recorded in 6 min with no deleterious effects from nonlinear processes. The selective enhancement of tryptophan scattering in a 1:10 molar solution of tryptophan to phenylalanine makes clear the advantage of a continuously tuneable UV source. Elaboration of this system to the full tuning range of titanium: sapphire lasers will create a laser source suitable for resonance Raman spectroscopy throughout the ultraviolet region (205–400 nm).

scholarly journals THz phase-contrast computed tomography based on Mach-Zehnder interferometer using continuous wave source: proof of the concept

2013 ◽  
Vol 21 (21) ◽  
pp. 25389 ◽  
Author(s):  
Masayuki Suga ◽  
Yoshiaki Sasaki ◽  
Takeshi Sasahara ◽  
Tetsuya Yuasa ◽  
Chiko Otani
Keyword(s):  
Computed Tomography ◽  
Phase Contrast ◽  
Continuous Wave ◽  
Zehnder Interferometer ◽  
Wave Source ◽  
Mach Zehnder Interferometer

scholarly journals Gravitational wave source localization for eccentric binary coalesce with a ground-based detector network

2017 ◽  
Vol 96 (8) ◽  
Author(s):  
Sizheng Ma ◽  
Zhoujian Cao ◽  
Chun-Yu Lin ◽  
Hsing-Po Pan ◽  
Hwei-Jang Yo
Keyword(s):  
Gravitational Wave ◽  
Source Localization ◽  
Wave Source
Sign in / Sign up

Export Citation Format

Share Document