The LEBIT project at the NSCL is an experiment under construction that will accept a high-energy beam from the coupled cyclotron and convert it to a low-energy, lowemittance beam. This low-energy beam will be used in a variety of experiments, including precision mass measurements of exotic nuclei. The experiment contains a gas-stopping cell followed by an ion transport and trapping system. One ...

Spin-polarized scanning electron microscopy (spin SEM) is a method, which measures spin polarizations of secondary electrons, for observing magnetic domains. The main characteristics of spin SEM images are high spatial resolution, topography independency, and the capability of magnetization vector analysis in three dimensions. Taking advantages of these characteristics, spin SEM is expected to ...

The effect of wedge-shaped fan flow deflectors on the mean and turbulent flow-fields of dual-stream jets is investigated. Several wedge-shaped deflector concepts were used to create asymmetry in the plume of a dual-stream jet issuing from a scaled down version of the NASA Glenn ‘5BB’ bypass-ratio 8 turbofan nozzle. The deflector configurations comprised internal and external wedges with and wit...

In the normal mode of operation, the TRIUMF cyclotron accelerates H ions to produce 500 MeV proton beams of 160 A with 4 nsec pulses separated by 43 nsec. A proposed experiment ( ! e conversion) requires a 500 MeV beam with 100-200 nsec pulses separated by 1-2 sec with an average intensity of 200 A. Two methods have been investigated to achieve this time structure. Both incorporate a pulsed ele...

We have designed, fabricated and characterized dual-wavelength metasurfaces that function at two assigned terahertz wavelengths with independent phase and amplitude control at each wavelength. Specifically, we have designed a dual-wavelength achromatic metasurface-based deflector deflecting the incident wave to the same direction at two selected wavelengths, which has circumvented the critical ...

In two configurations, a solid-state acousto-optic (AO) deflector or modulator is mounted in a 0.5 m monochromator for background correction with inductively coupled plasma atomic emission spectrometry (ICP-AES). A fused silica acousto-optic modulator (AOM) is used in the ultraviolet (UV) spectral region applications while a glass AO deflector (AOD) is used for the visible (VIS) region. The sys...

Flip buckets are terminal spillway elements, generating free jets for energy dissipation. Deflectors are an alternative to flip buckets with constructional ease yet of similar hydraulic features. A first experimental study published at the 33 IAHR Congress, Vancouver, investigated deflectorgenerated jets in terms of their air concentration characteristics. For jet impact onto a movable bed, the...

This paper presents a computational study on the aerodynamic effectiveness of vane-type fan-flow deflectors used for reducing jet noise from a supersonic turbofan exhaust with bypass ratio of 2.7. The numerical code solved the three-dimensional Reynolds-averaged Navier–Stokes equations. A series of nozzle configurations using deflector vanes of variable number, airfoil section, azimuthal mounti...

The Herschel satellite observatory will explore the universe at far-infrared, submillimetre, and millimetre wavelengths. This regime of the electromagnetic spectrum is difficult to observe, because water vapour in the Earth’s atmosphere absorbs the signals of almost all the astronomical sources. With the 3.5m telescope (the largest ever placed aboard a spacecraft), it will be possible to observ...