FlexPES-LDM-branch

The Low Density Matter branch is housing 1) the mobile coincidence spectroscopy end station (ICE, Ions in Coincidence with Electrons) at the upstream (EB01) position and 2) the permanently installed LDM-PES endstation at the downstream (EB02) position.

LDM – ICE endstation

Information on the LDM-ICE end station can be found on the Low Density Matter at MAX IV page or by contacting Noelle Walsh.

LDM-PES endstation

The permanent endstation at the LDM branch is dedicated to photoelectron and x-ray absorption spectroscopy studies on separate atoms and molecules, cluster beams, liquid beams, surfaces, and thin films. It comprises three chambers: an ionization chamber with Scienta SES R4000 electron spectrometer, preparation chamber with sample transfer and treatment facilities, and a fast introduction chamber with a sample garage. Main characteristics of this system are described below.

Ionization and Analysis Chamber

Base pressure10-8 mbar
Gas inputGas-sending system with 4 separate gas lines and 1 liquid vapor line (under construction)
Beam size at sample 120 x (10-100, slit dependent) μm2, can be increased on demand
Magnetic shieldingμ-metal
DetectionScienta R4000 spectrometer with MCP/CCD detector
Sample delivery1. Solid samples on sample manipulator
2. Molecular/cluster beams from a dedicated sample delivery system (to be booked well in advance)
3. Liquid beams from a dedicated liquid jet source (to be booked well in advance)
4. Solid samples transferred from an argon glove box docked to Introduction chamber

Preparation Chamber

Base pressure10-9 mbar
Sample manipulation 600 mm Z-travel XYZ VG Omniax manipulator with a rotation stage in horizontal arrangement
Sputter gunYes (IS 40C1 from Prevac)
DosingGas-sending system with 4 separate gas lines and 1 liquid vapor line (under construction)

Sample Introduction Chamber

Base pressure10-8 mbar
Sample manipulationMagnetic transfer arm to match the manipulator in preparation chamber
Sample storageCapacity: 6 samples