Frequency-sweep fourier transform ion cyclotron resonance spectroscopy

✍ Scribed by Melvin B. Comisarow; Alan G. Marshall

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 230 KB
• Volume: 26
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(74)80397-0

✦ Synopsis

A single ion cyctotron resonance (ICR) absorption spectrum showing both CH; and CHG signals has been obtained by exciting both ion cyclotron resonances with a frequency-swept rf irradiation, followed by broad-band detection, digitization of the (time-domain) response, and finally discrete Fourier transformation to produce the (frequencydomain) spectrum. Pdseckxcitution Fourier transform ICR has demonstrated the use of broad-band detecfion in rapid generation of ICR spectra by Fourier transform methods; this paper demonstrates thatficquencysweep excitation can provide the broad-band irradiation required to excite ion cyclotron resonances throughout any desired mass range. It will thus be possible to obtain an ICR absorption spectrum of given mass range. signal-to-noise ratio, and resolution in an observation period which is two orders of magnitude shorter than that needed to obtain the same spectrum by conventional slow-sweep detection.