Advanced PES systems
Advanced, multi-chamber PREVAC Advanced PES Systems for photoelectron spectroscopy experiments, designed for maximum compatibility with other surface science techniques, auxiliary lab equipment, and any accessories.
Versatile, modular design allows for easy platform expansion & integration with any other analytical, deposition or preparation HV/UHV units, connecting e.g. by radial distribution or tunnel transferring systems.
A pumping system combined with the standard volume of the analysis chamber allows for reaching the base pressure, where the base pressure is down to 10-11 mbar, depending on the pump's configuration.
Features
- Customized, extensive solutions for research needs in the field of XPS / UPS / ARPES / AES / EELS / ISS / IPES / LEIPS techniques
- Multi-chamber automated process
- Full automation of the experimental procedures
- Vertical or horizontal sample orientation
- Hemispherical energy analyser EA15 UHV with equipment
- High-power dual anode X-ray source with monochromator – AlKα & AgLα, with a power supply
- High-power dual anode, non-monochromatic X-ray source – AlKα & MgKα, with a power supply
- UV source with a power supply
- Flood source with a power supply
- Ion source for depth profiling or cleaning
- Motorized or manual 4-6 axes manipulator, with receiving station able to achieve from LHe/LN2 to high temperatures up to 1400°C
- Different sample holders size: from 10×10 mm up to 1 inch
- Analysis chamber Ø 450 mm
- Base pressure is down to 10-11 mbar, depending on the pump’s configuration
- Pumping system (based on the backup pump, TMP, ion pump & TSP)
- Vacuum gauges with equipment
- Load Lock chamber for the sample holders
- Reliable and fast linear transferring system from load-lock to the analysis chamber
- Viewports – observation windows
- Bakeout system
- The adjustable rigid main frame of the system
- 19“ cabinets with electronic units
- Fully controlled analysis process & equipment by Spectrium software and PLC unit
Description
The analysis chamber is equipped with connecting flanges in UHV standard for connecting current and future equipment, including:
- hemispherical energy analyser with equipment,
- X-ray twin anode monochromatic source with a power supply,
- X-ray twin anode non-monochromatic source with a power supply,
- UV mono source with a power supply,
- UV source with a power supply,
- flood source with a power supply,
- electron source with a power supply,
- ion source with a power supply for depth profiling or cleaning,
- gas cluster ion source with a power supply,
- sample manipulator with a wide temperature range (from LHe/LN2 up to 1400˚C),
- pumping set (based on the backup pump, TMP, ion pump & TSP with a huge area LN2 shroud),
- vacuum gauges with equipment,
- entry port for linear transferring systems e.g. from load lock to analysis chamber,
- Load Lock chamber for the sample holders,
- LEED with equipment,
- IPES / LEIPS with equipment,
- viewports – observation windows,
- residual gas analyser.
The modular design of the system allows combining and integration with any other research platform via radial distribution transferring solution or transferring tunnel. Final design and functionality depend on the system configuration.
A pumping system is a combination of different types of pumps, e.g. forevacuum pumps, ion pumps, turbo pumps, or titanium sublimation pumps with a huge area LN2 shroud, individually selected to achieve the best pumping performance according to specific application demands.
Spectrium analysis control software allows integration and perfect cooperation of a hemispherical energy analyser, and sources of various types, enabling easy recipe writing, automated measuring control and extensive data recording. Allows integrating new additional components based on Tango open source device.
Options
- UV mono source with a power supply
- LEED with equipment
- IPES / LEIPS with equipment
- Electron source with a power supply
- Gas cluster ion source with a power supply
- Storage chamber
- Radial distribution chamber, or transferring tunnel
- Vacuum suitcase (transport box) with a port in the load-lock chamber
- Residual gas analyser
- Pyrometer
Techniques
Photoemission spectroscopy (PES) is an experimental technique and the main variant of electron spectroscopy. The method is based on the photoelectric phenomenon and the analysis of the kinetic energy distribution of photoelectrons. The energy emitted results from the surface sample’s excitation with electromagnetic radiation.
The PES technique is the most frequently used method of surface testing and examination of thin layers. It provides information: on quantitative composition, atomic bonds characteristics, layers thickness. The basic process (photoeffect) measures the emission of photoelectrons as a result of irradiation of matter with photons.
Includes analytical PES techniques:
- XPS – X-ray photoelectron spectroscopy
- HAXPES – hard X-ray spectroscopy
- UPS – ultraviolet photoelectron spectroscopy
- ARPES – angle-resolved photoemission spectroscopy
Additional techniques:
- IPES – inverse photoemission spectroscopy
- LEIPS – low energy inverse photoelectron spectroscopy
- AES – auger electron spectroscopy
- EELS – electron energy loss spectroscopy
- ISS – ion scattering spectroscopy