Flow-through cryogenic NMR probe

US6838880B2 · kind B2 · utility

Assignee

• Bruker Biospin GmbH · DE

Inventors

• Martin Hofmann · Lörrach, DE
• Manfred Spraul · Ettlingenweier, DE
• Robert E. Nast · San Jose, US
• Damon Leslie Harris · Livermore, US

Key dates

• Filing date: Mar 13, 2003
• Grant date: Jan 4, 2005
• Expiry date: Mar 13, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/34092
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A nuclear magnetic resonance (NMR) spectroscopy probe has a sample cell into and out of which a room temperature liquid sample may be directed. The cell is surrounded by a radio frequency coil that is used to perform NMR measurements of the liquid sample, and which is maintained at cryogenic temperatures. The coil is separated from the sample cell by a thermally insulative boundary, such as a vacuum. The sample may enter the cell through an input path, and may exit through an output path. The input path, output path and sample cell may be surrounded by a sheath through which flows room temperature gas. The ends of the sample cell may be tapered to promote thorough flow through the cell, and flow diverters may be included in the sample cell adjacent to the input and output paths to force flow to the outer wall of the sample cell.