Spectrometer

US5235182A · kind A · utility

Assignee

• State of Israel, Atomic Energy Commission Research Center Negev · IL

Inventors

• Ram Avida · Omer, IL
• Menahem Friedman · Omer, IL
• Asaf Algom · Meitar, IL
• Avner Matmor · Omer, IL
• Zeev Karpas · Omer, IL
• Oded Shahal · Beer Sheva, IL

Key dates

• Filing date: Mar 24, 1992
• Grant date: Aug 10, 1993
• Expiry date: Mar 24, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/622
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In an ion mobility spectrometer comprising a spectrometer tube with an ion hutter, an ionization source within a reaction chamber, and a drift chamber, the improvement comprises providing in or around the said drift tube a plurality of conducting segments, across which an electric field is applied, the said conducting segments being separated from one another by insulating spacers, wherein the ratio between the width of the insulating spacers to the width of the conducting segments is between 2:1 and 1:1, preferably about 1.5:1.