نتایج جستجو برای: collimation

تعداد نتایج: 1626  

Journal: :Physical review letters 2017
Ming-Hao Liu Cosimo Gorini Klaus Richter

We put forward a concept to create highly collimated, nondispersive electron beams in pseudorelativistic Dirac materials such as graphene or topological insulator surfaces. Combining negative refraction and Klein collimation at a parabolic pn junction, the proposed lens generates beams, as narrow as the focal length, that stay focused over scales of several microns and can be steered by a magne...

2001
R. P. Fliller A. Drees D. Gassner L. Hammons D. Trbojevic V. Biryukov Y. Chesnokov V. Terekhov

The use of a two stage crystal collimation system in the RHIC yellow ring is examined. The system includes a copper beam scraper and a bent silicon crystal. While scrapers were installed in both of the RHIC rings before the year 2000 run, the crystal is installed for the 2001 run in one ring only, forming a two stage collimation system there. We present simulations of the expected channeling th...

2012
N. Ismail

We propose a novel technique for microlens fabrication which is compatible with silicon oxynitride technology, and enables the collimation of light exiting the waveguides into beams with divergence angles of 0.52°. Keywords-arrayed microlenses; integrated optics; waveguides

2002
Peter Tenenbaum

We summarize the formalism of collimator wakefields and their effect on beams that are near the center of the collimator gap, and apply the formalism to the TESLA, NLC, and CLIC collimation systems. Collimator Wakefield Calculations for ILC-TRC Report

Journal: :Symposium - International Astronomical Union 1997

Journal: :Symposium - International Astronomical Union 1987

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