A process for batch fabrication of low-cost microcoils for magnetic resonance spectroscopy is demonstrated. Conductors are fabricated on oxidised silicon substrates by electroplating metals inside a deep photoresist mould, and passivated using an epoxy-based resist. Through-wafer deep reactive ion etching is used to define sample volumes and stencil cuts around each die, and dies are separated ...

An experimental study of plasma jet at atmospheric pressure was carried out to examine the influence of external transverse magnetic field on it. A magnetic field was applied to the jet in atmospheric pressure by means of a pair of coils, same Helmholtz coil configuration. It was applied transverse to the jet flow. The strength of the direct current magnetic field was 00.057 Tesla between the t...

For highly sensitive magnetic measurements, e.g., a measurement of the neutron electric dipole moment (EDM), the magnetic field has to be stable in time on a level below picoTesla. One of several measures we employ to achieve this uses an external field coil system which can stabilize the ambient external field at a predefined value. Here we report on the construction and characterization of su...

Introduction In an environment of ultrahigh field (UHF) MRI, B1 + inhomogeneity causes contrast difference and spatially varying image signal in region-ofinterest (ROI). Recently, several designs of radiofrequency (RF) coils have been suggested to compensate this B1 + inhomogeneity. Using parallel transmission system [1-2] is also meaning for compensating B1 + inhomogeneity. However, most of av...

Abstract In electromagnetic detection, the received signal strength is largely determined by transmitter’s strength. Therefore, it necessary to select and design transmitting coil meet requirements of launching system. To obtain better-transmitting coils, Maxwell used establishing square toroidal models for calculation compare magnetic field intensity uniformity. cope with exploration in a comp...

From algal suspensions to magma upwellings, one finds jets which exhibit complex symmetry-breaking instabilities as they are decelerated by their surroundings. We consider here a model system--a saline jet descending through a salinity gradient--which produces dynamics unlike those of standard momentum jets or plumes. The jet coils like a corkscrew within a conduit of viscously entrained fluid,...

INTRODUCTION High-temperature superconducting (HTS) Helmholtz coil pairs have been shown to provide substantial increases in signal-to-noise ratio (SNR) for applications in NMR and MR microscopy (1, 2). One limitation of HTS coils is that their non-linear response to applied power produces distortion of shaped RF pulses (3). Through the use of a previously reported field mapping technique (4) m...

The aim of this study is to observe possible changes in the morphology, orientation or cell growth of an in vitro cultured Schwann cell line by 24 h exposure to 5 mT static magnetic fields. The magnetic field generator basically consists of a pair of circular coils in a Helmholtz arrangement and enables temperature to be controlled (37+/-0.1 degrees C). We did not find any statistically signifi...

This paper describes a set of magnetic measurement systems employed in the development of insertion devices at LNLS (Brazilian Synchrotron Light Source). They are: rotating coil (which can also operate as a flip-coil), spatial field mapping using Hall probes and parallel coils (Helmholtz configuration) for magnetic blocks characterization. Although such techniques are well established, strict s...