Über den Einfluß der Strömungsverteilung hinter der letzten Stufe einer Dampfturbine auf den Abdampfdiffusor

Die Verluste des Abdampfsystems werden sehr stark bestimmt durch die Beschaffenheit des Axialradialdiffusors, dessen Wirkungsgrad wiederum von der Verteilung der Strömungsgrößen hinter der letzten Stufe abhängt, insbesondere vom Geschwindigkeitsprofil, den Drallwinkel Da in Tangentialrichtung und einem induzierten Anstellwinkel in der Meridionalebene. In der Regel hat man die Möglichkeit, an nicht rotierenden Versuchsanlagen den Einfluß von einem einzigen der genannten Faktoren hinsichtlich der Auswirkung auf die Diffusorströmung zu untersuchen. Andererseits ist im realen Betrieb gerade der Bereich 'letzte Stufe - Diffusor' die Stelle, wo die Faktoren kompliziert zusammenwirken

The problem of the course reception of sympatomimetics from the group of aliphatic amines safety (geranamine, octodrine, AMP citrate)

Sport nutrition used to reduce weight or improve performance may contain psychostimulant aliphatic amines. The most common of them are DMAA, octodrine and AMP citrate. There are no toxicometric data for above compounds, which prevents their preclinical and clinical study and the formation of optimal dosing regimens or algorithms for overdose therapy. We determined that all of the above drugs have a low degree of cumulation of <20%. Based on the properties of this class of drug, the course should not exceed 7 days in order to avoid complications and the development of addiction

Observation of microwave radiation using low-cost detectors at the anka storage ring

Synchrotron light sources emit Coherent Synchrotron Radiation (CSR) for wavelengths longer than or equal to the bunch length. At most storage rings CSR cannot be observed, because the vacuum chamber cuts off radiation with long wavelengths. There are different approaches for shifting the CSR to shorter wavelengths that can propagate through the beam pipe, e.g.: the accelerator optics can be optimized for a low momentum compaction factor, thus reducing the bunch length. Alternatively, laser slicing can modulate substructures on long bunches [1]. Both techniques extend the CSR spectrum to shorter wavelengths, so that CSR is emitted at wavelengths below the waveguide shielding cut off. Usually fast detectors, like superconducting bolometer detector systems or Schottky barrier diodes, are used for observation of dynamic processes in accelerator physics. In this paper, we present observations of microwave radiation at ANKA using an alternative detector, a LNB (Low Noise Block) system. These devices are usually used in standard TV-SAT-receivers and are very cheap. We determined the time response of LNBs to be below 100 ns. The sensitivity of LNBs is optimized to detect very low intensity ”noise-like” signals. This microwave radiation study shows the possibility to apply the LNB for bunch length monitoring

Electro-optical bunch length monitor for flute: Layout and simulations

A new compact linear accelerator FLUTE is currently under construction at Karlsruhe Institute of Technology (KIT) in collaboration with DESY and PSI. It aims at obtaining femtosecond electron bunches (~1fs - 300 fs) with a wide charge range (1 pC - 3 nC) and requires a precise bunch length diagnostic system. Here we present the layout of a bunch length monitor based on the electro-optic technique of spectral decoding using an Yb-doped fiber laser system (central wavelength 1030 nm) and a GaP crystal. Simulations of the electro-optic signal for different operation modes of FLUTE were performed and main challenges are discussed in this talk. This work is funded by the European Union under contract PITN-GA-2011-28919