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Laengner R.,Institute For Energie Und Klimaforschung | Unterberg B.,Institute For Energie Und Klimaforschung | Lyssoivan A.,EURATOM | Paul M.,Institute For Energie Und Klimaforschung | And 7 more authors.
Journal of Nuclear Materials | Year: 2011

In this contribution, we report on the application of Li beam emission spectroscopy to determine electron density and temperature in ion cyclotron wall conditioning plasmas with the help of a collisional-radiative model. Intensity ratios of atomic line emission at 670 nm, 610 nm and 460 nm have been chosen. The overall range of ne and Te in ICWC plasmas measured with the Li beam is 1016 m-3 to a few 1017 m-3 for the electron density and 1.5-15 eV for the electron temperature. With the application of oscillating vertical and horizontal magnetic fields in the range of 0.01 T the plasma extends towards the bottom of the TEXTOR vessel, providing a wider distribution of particle fluxes to the vessel walls. © 2010 Elsevier B.V. All rights reserved. Source


Baufume S.,Institute For Energie Und Klimaforschung | Hennings W.,Institute For Energie Und Klimaforschung | Kuckshinrichs W.,Institute For Energie Und Klimaforschung | Linssen J.,Institute For Energie Und Klimaforschung | And 3 more authors.
BWK - Energie-Fachmagazin | Year: 2012

The forced system integration of renewable energy and increasing energy efficiency are two important pillars of the current energy concept of the federal government. Thus, energy storage development is recognized as an important key element. The current focus is directed particularly to the storage of electricity. Currently, research efforts of groRe are made for the storage of excess amounts of electricity, and possible concepts for seasonal balancing of fluctuating renewable generation are studied. Natural gas storage is already playing a role as seasonal demand fluctuations can be compensated. Electricity storage in the form of chemical energy (hydrogen or methane) is discussed. Through this, the so-called power-to-gas concept results in a linkage of electricity and gas network infrastructure. Source

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