PURPOSE Linac-magnetic resonance (MR) systems have been proposed in order to achieve realtime image guided radiotherapy. The design of a new linac-MR system with the in-line 6 MV linac generating x-rays along the symmetry axis of an open MR imager is outlined. This new design allows for a greater MR field strength to achieve better quality images while reducing hot and cold spots in treatment p...

The numerical simulation of the development a streamer discharge in gap with an external longitudinal magnetic field was used to demonstrate self-focusing such discharges. Self-focusing is caused by sharp deceleration radial ionization wave due change electron energy distribution function, decrease average energy, rate gas ionization, and mobility crossed electric fields as compared case withou...

PURPOSE The magnetic fields of linac-MR systems modify the path of contaminant electrons in photon beams, which alters patient skin dose. To accurately quantify the magnitude of changes in skin dose, the authors use Monte Carlo calculations that incorporate realistic 3D magnetic field models of longitudinal and transverse linac-MR systems. METHODS Finite element method (FEM) is used to genera...

The origin of the suppression of the longitudinal spin Seebeck effect by applied magnetic fields is studied. We perform numerical simulations of the stochastic Landau-Lifshitz-Gilbert equation of motion for an atomistic spin model and calculate the magnon accumulation in linear temperature gradients for different strengths of applied magnetic fields and different length scales of the temperatur...

We analyze the possibility of detecting weak magnetic fields by using magnetostrictive perturbation of optical fibers. The basic scheme is demonstrated in Fig. 1. A low-loss optical fiber of length L is sheathed in a magnetostrictive jacket that undergoes a longitudinal strain (magnetostriction) when immersed in a magnetic field. This strain affects the phase delay of a laser light beam propaga...

2014 Stationary convective instability in rectangular boxes of finite extent, under the action of an external magnetic field is considered within the framework of linearized theory. In the case where the magnetic field is vertical, by changing the scale accordingly, the situation is shown to be similar to a complete lack of magnetic field. When the magnetic field is horizontally applied, the is...

An ideal magnetic rail should provide a homogeneous magnetic field along the longitudinal direction to guarantee the reliable friction-free operation of high temperature superconducting (HTS) maglev vehicles. But in reality, magnetic field inhomogeneity may occur due to lots of reasons; the joint gap is the most direct one. Joint gaps inevitably exist between adjacent segments and influence the...