Magnetic field systems - Import export

Where are magnetic field mats used? The coils currently manufactured by us are processed by our customers into so-called electromagnetic field mats. These mats are used in Pulsed Electromagnetic Field (PEMF) therapy. Many PEMF devices are suitable for private use at home. However, various health service providers including physical therapists as well as non-medical practitioners offer therapies based on magnetic fields. Why is our embroidery technology used for production? This technique creates circular-shaped structures that form the basis for a homogeneous flow/direction of the electric current. At the same time, the mechanical wire laying has an extremely high level of accuracy. The distances can also precisely be determined. How is the magnetic field created? Simply put, this is how electromagnetic fields are created: pulsating magnetic fields are generated by the electric current flowing through the wire. The more wire, the stronger the magnetic field.

AMT&C LLC developed several types of axial magnetic field systems of permanent magnets that allow to reach highly homogenous field in a wide ranges of magnetic flux density and working area size. Examples of magnetic systems, given in the table, represent typical axial field systems that were designed and manufactured according to customized technical requirements. At your request the magnetic field source will be optimized to get the required parameters.

High-tech research is, perhaps, that particular market where the scientific potential and expertise of AMT&C’s research and engineering personnel can most fully be realized and appreciated. We offer the calculation, design and manufacture services in creating high-strength high-uniformity rare earth magnetic field sources/systems for BEAM CONTROL applications (beam focusing, charged particles acceleration and deflection). The development of permanent magnetic field sources for use with SPM, STM, AFM systems, as well as for MRAM and MRI/NMR applications, to the customer’s specific requirements is another promising area for advantageous collaboration.

The magnetic system of this field source is also built on the principle of nested cylindrical Halbach-structures. An important feature is the presence of two motors, controlled independently, so it is possible to manage the change not only the magnitude but also the direction of the magnetic field. Because the device was designed for operation together with an optical microscope, the vertical size of the system near the working region is reduced to 90 mm. Stepper motors, that turn the two magnetic subsystems, are located on the sides of the casing

This type of magnetic field sources also is based on the principle of dipole Halbach-structure, but the special design permits to get an optical access to the sample under investigation along several directions with a rather wide aperture. It is possible to supply the system with a built-in field measuring system, connected to a PC. The field adjustment can be controlled from a PC or with a built-in controller. The geometrical and field parameters described above can be change under customer specification.

This type of magnetic systems is developed for NMR applications, but can also be used for other tasks requiring the highly homogeneous magnetic field in the significant working volume. The main magnetic system, built on the principle of dipole Halbach-structure, is complemented by the additional corrective system of magnetic elements, that allows to bring the homogeneity of the magnetic field to the level of 10-4 in the desired working volume.

This magnetic system is specially designed for non-destructive testing of pumped vacuum devices, that required the creation of a uniform magnetic field not only in the center of the operating bore, but in the toroidal region of large size. The system is assembled on the basis of NdFeB permanent magnets.

This type of highly intensive magnetic field generator is based on the dipole Halbach structure principle and offers the possibility to vary the field value, including field polarity reversal, from –Bmax up to +Bmax. The magnetic induction vector is directed transverse to a cylinder-shaped working bore. The field direction is constant; the field uniformity is ±0.5%. The system is PC-controlled, so it is possible to assign various time profiles of the magnetic field. It is important, that it is possible, using these permanent magnet assemblies, to reach rather high field modulation rates – up to 10 T/sec. AMT&C LLC offers the production of the adjustable field systems under customer specifications. In case the high field uniformity and high field changing rate are not needed we can offer various types of simple adjustable systems. For example, the shown device has symmetrically moving poles so the inductance in the central point can be changed in limits from 0.1 to 1 T.

The compact system of permanent magnets NdFeB, designed according to the principle of the dipole Halbachstructure, allows to get, inside the bore, rather homogeneous magnetic field with the magnetic flux density up to 23 Tesla. The system can be an efficient alternative to electromagnetic sources of the magnetic field, and can be used in scientific and applied research requiring magnetic fields of high intensity. Geometrical dimensions and magnetic flux density in Halbachtype systems can vary widely, the attached data and photos are typical examples. AMT&C LLC offers the manufacturing of steady magnetic field systems according the customer technical specifications. To improve the temperature stability the system can be assembled of SmCo magnets.

AMT&C LLC offers a full range of services in calculations, design and manufacturing of permanent magnet assemblies with required magnetic field configuration. Many years experience in complicated magnetic systems production combined with application of modern most effective magnetic materials permit us to reach high parameters: - to produce, with permanent magnet systems, the magnetic flux density up to 3 Tesla and more; - to reach high homogeneity up to 105; - to create magnetic systems with complicated field pattern; - to produce adjustable magnetic field generators on the basis of permanent magnets. The magnetic field changing rate in such systems can reach 10 Tesla per second.

AMT&C LLC for many years is engaged in design and manufacture of the measuring equipment intended for research of magnetic properties of materials. In the field of the magnetocaloric effect (MCE) these products continue own scientific interests of the AMT&C company employees, recognized experts in this realm of physics. Manufacture of the scientific equipment is based on the following core technologies, backed by patents and numerous know-how: - a wide experience in design and manufacture of complicated magnetic systems, including the adjustable magnetic field generators, controlled by a computer; - use of the most advanced products and ideas in the field of measuring technics; - the magnetic field source and data acquisition system are controlled by means of the specialized software that allows to create setups operating in automatic mode; as a rule, the LabView based software is used. Since 2009 AMT&C LLC produces the measuring equipment under trade mark "MagEq".

STL offers the earth magnetic field simulator (EMFS) which can be used for worldwide simulation of the earth magnetic field. Earth Magnetic Field Simulators (EMFS) are typically being installed in a bay area or river estuary as well as artificial harbours. The EMFS System is used for calibration of the onboard degaussing system (OBDS) and Navy vessel's preparation for any operation missions and the dedicated simulation of the magnetic field in the area of mission. Quantity and type of used sensors, sensor array, software and coil system including power sources are always designed in respect of the specific requirements of the customer. STL can supply: - Complete sensor array - Data acquisition system - Control and evaluation software - coil cables and power sources Pricing may vary depending on the requested cable length, available power supply and required magnetic field.

Tesla leads the field in the production of superconducting cyclotrons for use in state-of-the-art and next generation medical therapies. Traditionally, cyclotron systems were constructed using resistive magnets which resulted in their being extremely large, complex systems of relatively low magnetic field strength. Today, Tesla design and manufacture extremely compact and up to 8T high magnetic field, superconducting magnet cyclotron systems for use in state-of-the-art medical therapies including: - Proton beam therapy, for the targeted treatment of tumors. - Positron Emission Tomography (PET), for radiopharmaceutical isotope generation e.g. used in myocardial perfusion imaging. ** Click for more **

Planar gradients for High Field Open (HFO) Magnetic Resonance Systems. Tesla design and produce a range of planar gradients for application in OEM High Field Open Magnetic Resonance Imaging (MR) systems where patients are imaged between two large plate magnets in an area that can be three times larger than in cylindrical systems. HFO MR or Open MRI systems are widely used in health care, since they can accommodate large patients and those who would otherwise experience claustrophobic reactions in a more comfortable and relaxed environment. ** Click for more **

Our coil systems are specially designed to generate very large magnetic fields in 1 to 3 dimensions. Every system essentially consists of 2 units: The coil system and the current control system to set the coil currents. The systems can be used for calibration, to compensate external fields, to generate specific magnetic fields, magnetic gradients etc. Our specification scope ranges from: - Frequency ranges: DC to 4 MHz, - Field ranges: from a few microtesla to 200 millitesla - Homogenity ranges: 1%, also over large volumes with small coil sizes - Field stabilities up to a few ppm FS - Size range from a few cm to more than 200 m - Actively compensated for environmental changes or uncompensated (optional) - Generating both magnetic fields and magnetic gradients with or without compensation - Magnetic far field drop off: r-3 to r-11

The AR series was specifically designed for workpieces that do not have any level contact surfaces. They are only switched on or off with a short compressed air impulse. Workpieces with level, flat, round or irregular surfaces are transported without effort. Individual solutions with multiple parallel-controlled magnets simplify your lifting task or work process. The magnets are only switched on with a short compressed air impulse between 5 and 8 bar. They are low-maintenance and have very fast switch-on times. It is not just used in fully automatic systems, but rather also for the simples manual lifting processes.

Nuclear fusion; the process that powers the Sun, releases energy by means of the fusing of two hydrogen atoms to form one helium atom. Adopting this process on Earth, as part of a next generation power station,1Kg of fusion fuel has the potential to provide the equivalent energy to 10 million Kg of fossil fuel, cleanly and from a potentially limitless fuel. Nuclear fusion reactions require the formation of a plasma of fuel, which can be achieved at temperatures over 100 million degrees. Sustaining this extremely thin and fragile plasma requires a sophisticated magnetic confinement system, which prevents contamination and cooling by the material surfaces. This is where Tesla come in. Tesla is supporting and enabling this international research effort, through the specialist supply of the critical magnetic confinement components for fusion experiments around the World, including: ITER MAST-U Tokamak W7X Stellarator JT-60SA ** Click for more **