Magnet system with variable field strength

Simple SummaryContent extracted from patent full text and abstract with AI.

The invention is a variable-field magnet system designed to generate and control magnetic fields in a sample chamber using at least two concentric stacks of rings containing permanent magnets. The magnet stacks can rotate relative to each other, allowing precise adjustment of the magnetic field strength within the chamber. The system uses lightweight, non-ferromagnetic rings with permanent magnets arranged in specialized geometries, and rotation is controlled by a motor and belt, offering portability and easy field adjustment without the need for heavy or power-hungry electromagnetic coils.

Use CasesContent extracted from patent full text and abstract with AI.

• Portable electron spin resonance (ESR) or electron paramagnetic resonance (EPR) spectroscopy for environmental or field analysis of samples
• Mobile laboratory equipment for chemical, biological, or archaeological fieldwork requiring controlled magnetic fields
• Scientific research requiring finely adjustable homogeneous magnetic fields outside traditional laboratory settings
• Magnetic field calibration systems for quality control or testing in industrial environments
• Medical or materials analysis devices that need movable and reliable variable magnetic fields
• Educational demonstrations of magnetism and resonance phenomena in classroom or outreach settings

BenefitsContent extracted from patent full text and abstract with AI.

• Highly portable compared to traditional electromagnet-based systems (significantly reduced weight and no need for heavy power supply or cooling systems)
• No requirement for continuous electrical power or liquid cryogens to maintain or adjust the magnetic field, enhancing field usability and reducing operational costs
• Precise and reproducible control of magnetic field strength by mechanical rotation instead of electrical adjustment, enabling fine field sweeping for accurate measurements
• Improved magnetic field homogeneity through optimized ring geometry and arrangement, essential for sensitive spectroscopy applications
• Scalability and flexibility, as multiple rings and stack configurations can be adapted for different sample sizes or field strength needs
• Reduced maintenance and operational complexity due to the use of permanent magnets and non-ferromagnetic materials

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The system has a sample area (5), and two stacks arranged concentrically around the sample area, where the stacks comprise rings (1a, 2a, 3a) with magnetized areas. The stacks are rotatably supported against each other and the rings comprise permanent magnets from a non-ferromagnetic material. A drive unit e.g. stepper motor (7c), is provided for rotating the stacks, and a toothed belt (7b) is provided as a connecting unit between the drive unit and one stack.