問い合わせ番号

INS-0000000326

High resolution soft x-ray angle-resolved photoemission spectrometer (A2 station)

  Soft X-ray photoemission experimental station equipped with the high resolution photoelectron analyzer (SES2002, Gammadata SCIENTA) is designed for the study on the electronic structure of various kinds of materials. This apparatus enables us to measure the angle-resolved photoemission spectrum using ±7° acceptance angle of photoelectron analyzer, the temperature dependence of the electronic structure down to 20 K using He cryostat as well as the polarization dependence using linearly (vertical and horizontal) and circularly polarized soft x rays.
  Photoemission apparatus is connected to laser molecular beam epitaxy (laser MBE) equipment in ultra high vacuum, enabling in situ observation of the electronic states of transition-metal oxide or nitride thin films fabricated in laser MBE equipment. The time-resolved photoemission spectroscopy using femto-second laser is also ready for the experiment. A time resolution of 40 ps is obtained for 100 fs and 40 ps pulse durations of the laser and the soft X-ray pulses, respectively.

• Specifications of laser system
  Mode-locked Ti : sapphire laser

  Average power	750 mW
  Tuning range	720 ∼ 850 nm
  Pulse width	100 fs
  Repetition rate	84.76 MHz

  Regenerative amplifier

  Pulse energy	1.1 mJ / pulse
  Wavelength	800 nm
  Pulse width	130 fs
  Repetition rate	1 kHz

  
  

  Schematic view of soft X-ray photoemission experimental station

  

  Photograph of soft X-ray photoemission experimental station

  

  Ti : sapphire laser (Spectra Physics) for the time-resolved photoemission spectroscopy