Localized surface plasmon resonance is characterized by a significant electric field component normal to some parts the surface. Shaping the surface to be normal to the direction of an incident electric field may increase the incident power coupling to the excited plasmonic mode, enhancing the absorption in lossy nanowires. In this work we perform a numerical analysis to investigate the depende...

We have recently designed and installed the first quadrant beam position monitor in the W01B-MX2 beamline. The whole monitor, including its electronics, was installed in-vacuum to reduce errors from current leakage and noise coupling from the outside of the vacuum chamber. Aspects of the mechanical and electronic design of this fluorescence-based beam position monitor, as well as the commission...

We present a phenomenological analysis of production and decays of˜t, ˜ b, and˜τ in e + e − collisions with √ s = 500 – 800 GeV. We include SUSY–QCD and Yukawa coupling corrections as well as initial state radiation. We show that e − beam polarization is a powerful tool for a determination of the underlying SUSY parameters. Using in addition a polarized e + beam improves the precision of the pa...

Scanning laser ophthalmoscopy has been used to measure individual cone-photoreceptor directionalities in the living human eye. The directionality is determined at different retinal eccentricities where it is expected that cones have diameters ranging between 5-10μm, comparable to the spot size of the incident beam. Individual cone directionality values are compared with the predicted directiona...

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1550-7998=20 The beam splitter in high-power interferometers is subject to significant radiation-pressure fluctuations. As a consequence, the phase relations which appear in the beam splitter coupling equations oscillate and phase modulation fields are generated which add to the reflected fields. In this paper, the transfer function of the various input fields impinging on the beam splitter fro...

Supported in part by DFG under contract GraKo 410 and GSI, Darmstadt Stochastic cooling will be an important issue in the new GSI project. Crucial to the efficiency of stochastic cooling is an ideal coupling to the beam. The main coupling elements are pickup/kicker electrodes. These electrodes have to be analysed and optimised extensively. The optimisation is performed by a three dimensional nu...

Phase locking of an array of lasers is a highly effective method in beam shaping because it increases the output power and reduces the lasing threshold. Here, we show a conceptually novel phase-locking mechanism based on ‘antenna mutual coupling’ in which laser elements interact through far-field radiations with definite phase relations. This allows a longrange global coupling among the array e...

B. Doliwa, H. De Gersem, T. Weiland, U.Blell, and O. Boine-Frankenheim Technische Universität Darmstadt, Institut für Theorie Elektromagnetischer Felder, Gesellschaft für Schwerionenforschung, Darmstadt The SIS-18 upgrade is an important step towards the realization of the FAIR project. Besides the resistive beampipe walls, the nine kicker modules mounted in the SIS-18 may have a parasitic infl...

A review of the three main observables for particle beam dynamics, namely tune, chromaticity and coupling is presented. Their relevance for the analysis of singleparticle motion will be discussed together with computational and measurement issues.