Installation of spectrally selective imaging system in RF negative ion source.

An Automatic Real Time Impedance Matching System for Use in an RF Electrostatics Accelerator Ion Source

Development Strategy of RF Ion Source for Neutral Beam Injector in Fusion Devices

Large-area RF-driven ion source is being developed at Germany for the heating and current drive of ITER device [1, 2]. Negative hydrogen ion sources are major components of neutral beam injection systems in future large-scale fusion experiments such as ITER and DEMO. RF sources for the production of positive hydrogen ions have been successfully developed at IPP (Max-Planck-Institute for Plasma ...

Physical Performance Analysis And The Progress Of The Development Of The Negative Ion RF Source For The ITER NBI System

For heating and current drive the neutral beam injection system for ITER requires a 1 MeV deuterium beam for up to 1 h pulse length. In order to inject the required 17 MW the large area source (1.9m x 0.9m) has to deliver 40 A of negative ion current at the specified source pressure of 0.3 Pa. In 2007 the IPP RF driven negative hydrogen ion source was chosen as the new reference source for the ...

Selective MRI of magnetically labeled cells – a comparative evaluation of positive contrast techniques

J-H. Seppenwoolde, R. Oude Engberink, A. van der Toorn, E. L. Blezer, C. J. Bakker Image Sciences Institute / Dept. of Radiology, University Medical Center Utrecht, Utrecht, Netherlands Introduction – For the detection and visualization of SPIO-labeled cells or clusters of USPIOs, T2*-weighted imaging is generally used. A clear disadvantage of using T2* weighted techniques is the detection of t...

Assessment of the Characteristics of MRI Coils in Terms of RF Non-Homogeneity Using Routine Spin Echo Sequences

Introduction: One of the major causes of image non-uniformity in MRI is due to the existence of  non-homogeneity in RF receive and transmit. This can be the most effective source of error in  quantitative  studies  in  MRI  imaging.  Part  of  this  non-homogeneity  demonstrates  the  characteristics of RF coil and part of it is due to the interaction of RF field with the material being  imaged...