General information

SR beam spot size100 µm x 100 µm
Pressure range for XPS measurementsUHV to 20 mbar
AnalyserSPECS Phoibos 150 NAP
Beamline energy range27 to 1500 eV

The SPECIES APXPS endstation is designed for ambient-pressure XPS measurements using dedicated cells. The endstation is equipped with UHV manipulator to facilitate normal measurements in UHV conditions with sample heating and typical sample preparation methods. Dedicated ambient pressure cells enable measurements to be carried out at higher gas pressures. Below we describe the endstation in detail.

Analysis chamber

Base pressure5e-10 mbar
Sample manipulationX, Y, Z, rot (UHV manipulator)
X, Y, Z (AP cells)
X-ray sourcesEPU61 and
SPECS XR50 with Mg and Al anodes, 250 W power (unmonochromatized and unfocused)
Sample storageGarage with three slots

Ambient pressure cells

Max pressure25 mbar
Max temperatureUp to 600 C with resistive heating (button heater) with PID control
Min temperature-30 C with LN2 cooling
SR incidence angle57 deg with respect to analyser
Electron detectionVariable angles (UHV manipulator)
Normal to surface (AP cells)
Analyser apertures (with AP cells)0.3 mm, 0.5 mm, 1.0 mm
QMSDycor LCD200 up to 200 amu range
Can sample cell inlet and outlet
Gas dosingCurrent status: Up to two independent gases
Under construction/validation: Two gas mixing panels for a total of 8 gases
General purpose/catalysis cellAvailable for users
Sulphur cellCell available for users. Gas system under construction
ALD cellUnder construction

Analyser

TypeSPECS Phoibos 150 NAP with differentially pumped lens system
Energy resolution< 10 meV, depending on applied settings
Kinetic energy range0 to 3.5 keV
DetectorDelay line detector
ModesTransmission (medium and small area), angular
SoftwareSpecsLab Prodigy

Preparation chamber

Base pressure2e-10 mbar
UHV manipulatorX, Y, Z and rotation
HeatingUp to 1000 C (e-beam heater with PID control)
CoolingAir cooling of sample stage
Sputter gunSPECS Ar Sputter gun
LEEDSPECS ErLEED
Evaporation sourceFocus EFM 3T triple cell evaporator
GasesPossibility to leak in several gases
ElectrosprayAvailable upon special request
Available ports for user equipmentPort size: DN40CF with a manual gate valve (no need of venting preparation chamber for installation)

Load lock

Base pressure2e-8
Sample holderFlag style
Sample size10 mm x 8 mm
Transfer time30 min (from air)

2019-04-01

A successful call for proposals

The spring call for proposals for eight beamlines at MAX IV closed 19 March with a total of 228 proposals from 28 countries. The number of applications is on par with proposals received when the former MAX-lab peaked, which shows that the demand from users is high as well as is their confidence in getting excellent tools