High current coaxial ion beam/laser beam spectrometer

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.

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Physics

Grantor dc:publisher

University of Nevada, Las Vegas

Year

1992

Author dc:creator

• Tu, Qiang

Statement dc:rights

• IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English

Identifier

https://oasis.library.unlv.edu/rtds/192

OAI identifier oai:identifier

oai:oasis.library.unlv.edu:rtds-1191