Synchronization of femtosecond UV-IR laser with electron beam for pulse radiolysis studies

Akinori Saeki, Takahiro Kozawa, Shigeru Kashiwagi, Kazumasa Okamoto, Goro Isoyama, Yoichi Yoshida, Seiichi Tagawa

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


A picosecond stroboscopic pulse radiolysis system which consists of a femtosecond laser and a picosecond L-band linear accelerator (linac) is demonstrated. A newly installed femtosecond laser system operated at 960 Hz can cover a wide region of wavelength ranging from <300 nm to 10 μm, although the upper limit is 1.7 μm to date because of the sensitivity of photodetectors. In order to achieve a high accuracy of synchronization between the laser and the linac, a new timing and synchronization circuit was developed. A double pulse detection method was applied for the new system, resulting in doubling of the improvement in signal-to-noise ratio. The time resolution and time jitter were estimated from the rise time of hydrated electrons at 600 nm, and the transient absorption kinetics of electrons in n-dodecane was measured at 1300 nm.

Original languageEnglish
Pages (from-to)627-633
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number3
Publication statusPublished - 2005 Jul 11


  • Femtosecond laser
  • Linear accelerator
  • Radiation chemistry
  • Stroboscopic pulse radiolysis
  • Synchronization
  • Transient absorption spectroscopy in infrared


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