A new pulse width reduction technique for pulsed electron paramagnetic resonance spectroscopy

Yasunori Ohba, Shigeaki Nakazawa, Shunji Kazama, Yukio Mizuta

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We present a new technique for a microwave pulse modulator that generates a short microwave pulse of approximately 1 ns for use in an electron paramagnetic resonance (EPR) spectrometer. A quadruple-frequency multiplier that generates a signal of 16-20 GHz from an input of 4-5 GHz was employed to reduce the rise and fall times of the pulse prepared by a PIN diode switch. We examined the transient response characteristics of a commercial frequency multiplier and found that the device can function as a multiplier for pulsed signal even though it was designed for continuous wave operation. We applied the technique to a Ku band pulsed EPR spectrometer and successfully observed a spin echo signal with a broad excitation bandwidth of approximately 1.6 mT using 80° pulses of 1.5 ns.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Magnetic Resonance
Volume191
Issue number1
DOIs
Publication statusPublished - 2008 Mar 1

Keywords

  • Excitation bandwidth
  • Frequency multiplier
  • PIN diode switch
  • Pulsed EPR

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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