Apparatus for unilateral generation of a homogeneous magnetic field

Patent · Tue Jan 26 04:00:00 EST 1988

OSTI ID:5635654

Fukushima, E; Rath, A R; Roeder, S B.W.

This patent describes an apparatus for generating within a selected volume a magnetic field having a uniform strength to a selected tolerance. It comprises: a first electromagnet coil having a first number of turns N{sub 1} at a first radius R{sub 1} with a center of the first coil spaced axially a first distance from the selected volume; a second electromagnet coil axially concentric with and parallel to the first coil and having a second number of turns N{sub 2} at a second radius R{sub 2} greater than R{sub 1} and spaced unilateral of the volume with the first coil a second distance greater than the first distance from the selected volume; the first radius and first distance and the second radius and second distance being functionally related to enable the first and second electromagnet coils to produce first and second magnetic fields, respectively, having substantially linear gradients within the selected volume; N{sub 1} and N{sub 2} being effective when energized with predetermined first and second currents, respectively, to produce equal and opposite gradients of the respective first and second magnetic fields in the unilateral volume and a net magnetic field having a strength within the selected volume effective for nuclear magnetic resonance determinations.

• Assignee: Dept. of Energy, Washington, DC (USA)
• Patent Number(s): A; US 4721914
• Application Number: PPN: US 6-605950A
• OSTI ID: 5635654
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426000* -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
MAGNET COILS
MAGNETIC FIELDS
MAGNETIC RESONANCE
MAGNETS
NUCLEAR MAGNETIC RESONANCE
PRODUCTION
RESONANCE