arXiv subjects
Publications and source records attributed to M. Holz.
In this paper, beam diagnostic and monitoring tools developed by the MAX IV Operations Group are discussed. In particular, new beam position monitoring and accelerator tunes visualization software tools, as well as tools that directly influence the beam quality and stability are introduced. An availability and downtime monitoring application is also presented.
Semiconductor-metal hybrid structures can exhibit a very large geometrical magnetoresistance effect, the so-called extraordinary magnetoresistance (EMR) effect. In this paper, we analyze this effect by means of a model based on the finite element method and compare our results with experimental data. In particular, we investigate the important effect of the contact resistance $ρ_c$ between the semiconductor and the metal on the EMR effect. Introducing a realistic $ρ_c=3.5\times 10^{-7} Ω{\rm cm}^2$ in our model we find that at room temperature this reduces the EMR by 30% if compared to an analysis where $ρ_c$ is not considered.