Award Date

1-1-1992

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Physics

Number of Pages

61

Abstract

The construction and operation of a new apparatus for making spectroscopic investigations of molecular ions is described. In the new ion beam machine, the ion beam and laser beam overlap in a coaxial geometry. The machine has much higher ion current than an apparatus previous used. The laser beam induces transitions between internal states of the molecular ion. The transitions are detected by allowing the ion beam to collide with background gas and detecting the surviving ion beam current. Because the cross-section depends on the internal state of the ion, the surviving ion beam current will change when the laser frequency is resonant with the ions. In a molecular ion spectroscopic experiment, high ion current is necessary for detection by laser absorption. In addition, higher current is also desirable for collisional detection. The first measurement using the new apparatus is described: the detection of transition in CO{dollar}\sp+{dollar} using collisional detection.

Keywords

Beam; Coaxial; Current; High; Ion; Laser; Spectrometer

Controlled Subject

Molecular dynamics; Electrical engineering

File Format

pdf

File Size

1740.8 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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