1999
DOI: 10.1063/1.1149725
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A portable, pulsed-molecular-beam, Fourier-transform microwave spectrometer designed for chemical analysis

Abstract: Harmony et. al. a recently published some design specifications for a smaller version of a FTMW spectrometer. In this work they used a perpendicular nozzle arrangement and found that even though the size of the vacuum chamber and Fabry-Perot cavity mirrors had been greatly reduced, the overall sensitivity was nearly the same as a conventional sized resonator. In an effort to establish FTMW spectroscopy as a viable new technique for analytical chemists, we have constructed a spectrometer of similar size for use… Show more

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Cited by 157 publications
(179 citation statements)
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“…The gas sample was expanded into vacuum by using a pulsed valve (Series 9, 10 Hz, 0.8-mm orifice; General Valve). The FTMW spectrometer used in these measurements is a compact Balle-Flygare-type instrument based on the recent National Institute of Standards and Technology design (35).…”
Section: Methodsmentioning
confidence: 99%
“…The gas sample was expanded into vacuum by using a pulsed valve (Series 9, 10 Hz, 0.8-mm orifice; General Valve). The FTMW spectrometer used in these measurements is a compact Balle-Flygare-type instrument based on the recent National Institute of Standards and Technology design (35).…”
Section: Methodsmentioning
confidence: 99%
“…The linewidth (HWHM) of the individual components is on the order of 1.5 kHz, or 0.00000005 cm −1 ; at an appreciable S/N ratio a frequency accuracy of 150 Hz, or 0.000000005 cm −1 is achieved for unblended lines. The extraordinary resolution provides supersonic-jet expansion FT-MW spectroscopy with a chemical specificity unrivaled by any other analytical method (Suenram et al 1999, Bousquet et al 2005. Furthermore, the sensitivity allows for the observation of, e.g., mono-deuterated asymmetric-top molecules in natural abundance (Dreizler et al 1998).…”
Section: Supersonic-jet Short-stimulus Signalmentioning
confidence: 99%
“…While alternative cylindrical cavity designs, utilizing the low-loss TE 01 -mode, have also been tried (Storm et al 1996), considerable improvements were achieved mostly by optimizing the parameters of the Fabry-Pérot-type resonator. Quite compact resonators (Suenram et al 1999) can successfully be employed in the cm wave range. Further developments include cryogenic operation of the spectrometer using a thermally isolated Fabry-Pérot-type resonator .…”
Section: Pulsed Radiation Microwave Excitation Of Supersonic Jetsmentioning
confidence: 99%
“…J transitions with J = 1,…,5 of the rotational spectrum of (CH 3 ) 3 GeCl were recorded at the NIST by using two FTMW spectrometers with pulsed molecular beams. [25][26][27][28] With argon as the carrier gas, the uncertainty in the transition frequency is about 4 kHz. To determine the J + 1 !…”
Section: Methodsmentioning
confidence: 99%