This paper presents an in-plane hydrodynamically reconfigurable optofluidic microlens, which is formed by the laminar flow of two streams of a low-refractive-index fluid and two streams of a high-refractive-index fluid in the two microchannels connecting to an expansion chamber where the microlens finally forms. In the expansion chamber, the stream of high-refractive-index fluid, acting as core...

Recent IHEP Protvino experiments show efficiencies of crystal-assisted slow extraction and collimation of 85.3±2.8%, at the intensities of the chan-neled beam on the order of 10 12 proton per spill of ∼2 s duration. The obtained experimental data well follows the theory predictions. We compare the measurements against theory and outline the theoretical potential for further improvement in the e...

Optical phase singularities, also called optical vortices, are known to have applications in various branches of optics. Here the role played by optical vortices in collimation testing is explained. Interference and a diffractive experimental setup in which the presence of an optical vortex permits collimation testing are presented. It is shown that the moire fringes that aid in collimation det...

The activity concentration for various radionuclides produced in the soil around the collimation section of the Beam Delivery System for the Next Linear Collider is calculated using the FLUKA Monte Carlo code. Different methods are used to calculate the activity concentration of H, Na and Be in soil. The activity concentration of H and Na in groundwater are also calculated and compared with the...

It is shown that multiple volume reflections from different planes of one bent crystal becomes possible when particles move at a small angle with respect to a crystal axis. Such a Multiple Volume Reflection makes it possible to increase the particle deflection angle inside one crystal by more than four times and can be used to increase the efficiency of beam extraction and collimation at the LH...

An all-solid-state 252 nm coherent light source with external cavities for laser cooling silicon atoms using twostage highly efficient frequency conversions has been developed. With the coherent light source, it is possible to manipulate the atomic motion of the silicon atoms, which is necessary for nano-process applications. In this paper, deflection, collimation, and axial velocity selection ...

UNLABELLED The objective of this study, which is related to human brain SPECT, was to increase the sensitivity of a triple-camera SPECT system and reduce statistical noise in reconstructed images using a combination of converging collimators. The reason for combining collimators is to ensure both high sensitivity and sufficient sampling without trading off spatial resolution. METHODS A high-s...

We have performed a 2D blue detuned Sisyphus collimation of cesium beam. Compared to red Doppler transverse molasses cooling, the setup was found very advantageous because its faster cooling time allowing short ( $${1}~\text {cm}$$ ) length and thus finally denser atomic A fibered laser developed delivering up $${500}\,\text {mW}$$ fiber coupled optical power. realized but this can be done only...