Experimental Station 13-2

The BL13-2 staiton has an APPES (ambient pressure photoemission spectroscopy) station with a differentially pumped electron spectrometer (SES-100, VG-Scienta). The station is designed for photoemission spectroscopy and Auger electron yield x-ray absorption spectroscopy measurements under near ambient conditions (up to 10 Torr). The APPES station provides the capability to investigate thermal catalytic and electrochemical processes under reactive conditions. The sample temperature can be varied from 300 K to 600 K under reactive conditions by a ceramic heater.

Supported Techniques
Photoemission spectroscopy
Soft x-ray absorption spectroscopy
Main Scientific Disciplines
Materials Sciences
Beam Line Specifications


26-pole elliptical polarizing undulator (EPU), 0.25 mrad acceptance

  Energy Range Resolution ΔE/E Spot Size Flux (ph/sec)
Focused 270-1450 eV (XPS), 180-1450 eV (XAS) 1 x 10-4 0.01 x 0.075 mm2 1011 - 1012



  • Horizontal flat followed by a vertical sphere, both Pt coated
  • Monochromator: Spherical Grating Monochrometer (SGM)
    • 300 l/mm, Ni coated
    • 600 l/mm, Ni coated
    • 1100 l/mm, Pt coated
  • Kirkpatrick-Baez Mirror Pair (Pt)



  • Ambient Pressure Photoemission System (APPES)
Sample Environment
  • UHV ~ 10 Torr
  • Sample size: < 5 x 5 mm2
  • Sample temperature: 300 - 600 K
  • Sample requirement: Non-Volatile, Non-Toxic
Data Acquisition and Analysis
  • SPEC
  • Ses.exe
  • Igor Pro
Beam Line Phone
650-926-5132. On-site Users: Contact the Duty Operator at 9-926-4040
Beam Line Contact

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