Ion cyclotron resonance cell

Patent · 14 February 1995

OSTI ID:27729

Weller, R R

An ion cyclotron resonance cell is disclosed having two adjacent sections separated by a center trapping plate. The first section is defined by the center trapping plate, a first end trapping plate, and excitation and detector electrodes. The second section includes a second end trapping plate spaced apart from the center plate, a mirror, and an analyzer. The analyzer includes a wavelength-selective light detector, such as a detector incorporating an acousto-optical device (AOD) and a photodetector. One or more ion guides, grounded plates with holes for the ion beam, are positioned within the vacuum chamber of the mass spectrometer between the ion source and the cell. After ions are trapped and analyzed by ion cyclotron resonance techniques in the first section, the ions of interest are selected according to their mass and passed into the second section for optical spectroscopic studies. The trapped ions are excited by light from a laser and caused thereby to fluoresce. The fluorescent light emitted by the excited ions is reflected by the mirror and directed onto the detector. The AOD is scanned, and the photodetector output is recorded and analyzed. The ions remain in the second section for an extended period, enabling multiple studies to be carried out on the same ensemble of ions. 5 figs.

• Research Organization: Westinghouse Savannah River Co
• DOE Contract Number: AC09-89SR18035
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5,389,784/A/
• Application Number: PAN: 8-064,887
• OSTI ID: 27729
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
DESIGN
EXCITATION
FLUORESCENCE SPECTROSCOPY
ION CYCLOTRON RESONANCE SPECTROSCOPY
MASS SPECTROMETERS