introduction:  image  distortion  is  one  of  the  major  problems  of  magnetic  resonance  imaging  (mri) for use in 3dmri, velocity mri, fmri and radiotherapy treatment planning (rttp). it is  widely known that the most obvious effect of the inhomogenity of the magnetic fields and the  nonlinearity  of  the  gradient  is  the  geometric  distortion  of  mr  tomograms.  in  this  study,  the...

In this article we perform a general study of possible positron source for linear collider TESLA based on the HERA electron ring. 30 GeV electrons passing 10T wiggler can produce intense synchrotron radiation with characteristic energy of photons of about 6 MeV. High energy photons are converted to few-MeV positrons in a suitable target. The ability of such a source to fit for the TESLA require...

As next generation e + e − linear collider the superconducting accelerator project TESLA has been proposed. In this note the physics potential goals of this project, which is highly complementary to LHC, are described. a a DESY-Zeuthen As next generation e + e − linear collider the superconducting accelerator project TESLA has been proposed. In this note the physics potential goals of this proj...

The ground-based augmentation system (GBAS) is the cornerstone for enabling automated landings without instrument landing (ILS). Currently, GBAS evolving to approach service type-D (GAST-D) category III landings. This development toward GAST-D extends via use of multiple frequencies (L1/L2 and L5) global navigation satellite constellations. requires correction data be broadcast aircraft, which ...