Fourier transform microwave spectrometer using an electric-field cross-correlation technique

Journal Article · Tue Jul 01 00:00:00 EDT 1986 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138597· OSTI ID:5814374

Ramsey, J M; Whitten, W B

An electric-field cross-correlation technique is described which can be used for measuring microwave rotational absorption spectra and which has a wide range of applications in other areas. The spectrometer is a novel implementation of a Michelson interferometer. The wide bandwidth source is obtained by modulating a single-frequency signal with a pseudorandom binary sequence. The variable phase delay for determining the cross-correlation function is obtained synthetically from an identical but out-of-phase pseudorandom sequence. The spectrometer operates at X-band frequencies with a bandwidth of approx. =100 MHz and a resolution of approx. =100 kHz. The J = 1reverse arrow0 transition of /sup 16/O/sup 12/C/sup 32/S was observed.

• Research Organization: Analytical Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5814374
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 57:7
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
MICROWAVE EQUIPMENT
DESIGN
RESOLUTION
SENSITIVITY
OPTICAL SPECTROMETERS
ABSORPTION SPECTROSCOPY
CARBONYLS
CHEMICAL ANALYSIS
CORRELATIONS
ELECTRIC FIELDS
FREQUENCY MODULATION
MICHELSON INTERFEROMETER
OPERATION
SIGNAL-TO-NOISE RATIO
SULFIDES
CHALCOGENIDES
ELECTRONIC EQUIPMENT
EQUIPMENT
INTERFEROMETERS
MEASURING INSTRUMENTS
MODULATION
SPECTROMETERS
SPECTROSCOPY
SULFUR COMPOUNDS
440300* - Miscellaneous Instruments- (-1989)