Improvement of a High-resolution Pulse Cold Neutron Spectrometer AGNES

A pulse-front-tilt-compensated streaked optical spectrometer with high throughput and picosecond time resolution.

A high-throughput, broadband optical spectrometer coupled to the Rochester optical streak system equipped with a Photonis P820 streak tube was designed to record time-resolved spectra with 1-ps time resolution. Spectral resolution of 0.8 nm is achieved over a wavelength coverage range of 480 to 580 nm, using a 300-groove/mm diffraction grating in conjunction with a pair of 225-mm-focal-length d...

A high-resolution Ramsey-Bordé spectrometer for optical clocks based on cold Mg atoms

We report on recent progress in our Ramsey-Bordé interferometer with cold magnesium atoms at 457.2 nm. A resolution as high as ∆ν = 290 Hz was achieved, which corresponds to a quality factor of Q = 2.3 × 10. An upper limit of 170 Hz for the laser oscillator line width is inferred from the interferometric analysis of the contrast decay induced by the residual atomic motion and spontaneous emissi...

The new cold neutron chopper spectrometer at the Spallation Neutron Source: design and performance.

The design and performance of the new cold neutron chopper spectrometer (CNCS) at the Spallation Neutron Source in Oak Ridge are described. CNCS is a direct-geometry inelastic time-of-flight spectrometer, designed essentially to cover the same energy and momentum transfer ranges as IN5 at ILL, LET at ISIS, DCS at NIST, TOFTOF at FRM-II, AMATERAS at J-PARC, PHAROS at LANSCE, and NEAT at HZB, at ...

The High Resolution K 600 Spectrometer

A high-resolution glottal pulse tracker

A new method of computing the glottal pulse period of voiced speech is given. This algorithm is based on the mathematically derived fact that the amplitudes of the odd harmonics of a periodic function with period P are zero when the function is expanded in a Fourier series whose coefficients are determined by integrating over 2P instead of the usual P. It is shown that such a glottal pulse trac...