The turbulent convective thermal transfer in channel heat exchangers (CHEs) is studied numerically via the CFD (Computational Fluid Dynamics) method. Deflectors are inserted on hot bottom walls of to enhance hydrothermal characteristics. Various shapes in-line deflectors considered, namely: rectangular (a/b = 0.00), cascaded rectangular-triangular 0.25, 0.50, and 0.75), triangular 1.00) shapes....

A large aperture electro-optic deflector has been designed, realized and tested for application on a laser-wire-scanner for particle accelerators. Results on the important parameters such as deflection strength, speed and mode quality preservation are shown and discussed. This report was presented in the EPAC Conference under the reference TUPC123 [email protected] !"#$%$&'()*)+',&#-$.%$...

We review recent experimental results from the BNL ATF using the compressor built by UCLA. The measurements discussed include: first observation of short wavelength coherent edge radiation angular/wavelength spectrum and spectrum, sub-100 fsec pulse-length coherent transition autocorrelation measurements, and longitudinal and transverse phase space distortions. Extension of these measurements, ...

The flocculation that takes place in the central feedwell of thickener plays a crucial role coal-slurry thickening process, which is not only complex but also largely influenced by flow characteristics. A coupled computational fluid dynamics–population balance model (CFD–PBM) was used to flocculation-thickening behaviour an industrial-scale gravity thickener. initialisation parameters inlet wer...

Light rays from a multiply imaged quasar usually sample different path lengths across the deflector. Extinction in the lensing galaxy may thus lead to a differential obscuration and reddening between the observed macro-lensed QSO images. These effects naturally depend on the precise shape of the extinction law and on the redshift of the lens. By means of numerical Monte-Carlo simulations, using...

Many alpine torrents convey regularly debris flows of high destructive hazard. After several granular events observed in Bruchji’s torrent near the Blatten village in the Swiss Alps, it was decided to manage the risk of similar debris flows by designing and constructing a control structure inside the torrent bed. Associated with a breach in the right bank side of the torrent, this control struc...

Dechirper is a passive device composed of a vacuum chamber of two corrugated, metallic plates with an adjustable gap. By introducing a small offset in the dechirper with respect to the reference axis, one might generate transverse wakefields and use the dechirper as a deflector. Understanding the interactions between electron beams of various longitudinal shapes with the wakefields generated by...

Real -time data storage and processing using optical techniques have been considered in recent years. Of particular interest are photosensitive electro-optic crystals which permit volume storage in the form of phase holograms, by means of a charge transfer process. A survey of the state of the art of such holographic memories is presented. The physical mechanism responsible for the formation of...

We propose a simple method to produce short x-ray pulses using a spatially chirped electron bunch in a SASE FEL. The spatial chirp is generated using an rf deflector which produces a transverse offset (in y and/or y′) correlated with the longitudinal bunch position. Since the FEL gain is very sensitive to an initial offset in the transverse phase space at the entrance of the undulator, only a s...