Sport Size50 µ x 50 µ
Pressure range for XPS2 x 10-10 to 50 mbar
AnalyzerScienta Hipp-3 with SWIFT acceleration mode
Energy range110 eV - 2000 eV
Ambient Pressure CellsCatalysis/General Purpose (Available), Liquids/Electrochemical, Biological, High-T

The HIPPIE end station for Ambient pressure x-ray photoelectron spectroscopy (APXPS) and Ambient pressure x-ray absorption spectroscopy (APXAS) offers the possibility of recording XP and XA spectroscopy at pressures from a maximum of 50 mbar and down to UHV. The endstation consists of an analysis chamber equipped with a hemispherical ScientaOmicron HiPP-3 electron energy analyser. An ambient pressure experimental cell (AP Cell) can be docked to the analyser for ambient pressure experiments. When the AP cell is retracted UHV experiments can be performed. The analysis chamber is also equipped with a  Bruker PM-IRAS instrument for simultaneous recording of APXP/APXA spectra and PM-IRA spectra; likewise, the composition of gas/vapour in the AP cell can be monitored by mass spectroscopy. Further the end station contain a preparation chamber, load lock, and UFO distribution chamber.

The HIPPIE end station is dedicated to studies of interfaces between solids, liquids, and gases under realistic conditions. The endstation uses the high brilliance of the X-rays from the MAX IV 3 GeV ring to allow studies in the chemical, space, and time domains. The core of the endstation is a ScientaOmicron HiPP-3 electron energy analyser capable of recording a photoemission signal at pressures up to 50 mbar. Conducting experiments at such conditions allows to close the so-called “pressure gap” for many catalytic systems. Also, since 50 mbar is above the water vapour pressure at room temperature, it allows studies of liquids at 100% relative humidity, i.e. at thermodynamic equilibrium. This opens unlimited opportunities for studies of electrochemical, biological, atmospheric, and geological phenomena, many of which could not be studies by conventional surface science techniques. However, HIPPIE still offers the users the full range of surface science techniques in order to fully make use of hte users’ knowledge of the system from UHV studies. This is achieved by a “cell-in-cell” design of the end station, where the AP cell is placed inside standard a UHV chamber. In this design switching between UHV and AP conditions takes a few seconds, and, thus, full range of pressures is available at the disposal of the user – from UHV to 50 mbar.

 

Hippie_012

Analysis chamber

Base Pressure1 x 10-10 mbar
Sample manipulationX, Y, Z, Rot
X-ray Sources1. EPU 53 from MAX IV 3 GeV ring. 110 eV - 200 eV, E/∆E = 40000 (440 eV), spot size 50 µ x 50 µ
2. Scienta XXX, Al Ka, 1486 eV, E/∆E = 10000, spot size 1 x 3 mm, 200 W max power
PM-IRAS sourceBruker YYY
Heating Type (UHV)2 independent heaters:
1. e-beam (up to 1200 C)
2. resistive (C/BN) up to 800 C
Cooling1. Cooling Water
2. LN

Preparation chamber

Base Pressure1 x 10-10 mbar
Sample manipulationX, Y, Z, Rot
LEEDOmicron
Sputter Gun
Heating Type 2 independent heaters:
1. e-beam (up to 1200 C)
2. resistive (C/BN) up to 800 C
Cooling1. Water
2. LN
Sample LoadingLoad Lock with vacuum suitcase
Deposition SourcesMetal evaporator (Omicron)
User-defined. Available ports CF 40, CF 63

Ambient Pressure Cell

Base Pressure 1 x 10-9 mbar
Sample manipulationX, Y, Z
Pressure range1 x 10-9 - 50 mbar
HeatersChoice between 2 types
1. Laser (TBD). Up to 1000 C in 50 mbar
2. BN ceramic with C heating element. Up to 800 C in 50 mbar
CoolingEthanol chiller. Down to -45 C
Sample holder typeOmicron flag style
Sample sizemax 8 x 8 mm
QMSHiden
Available analyser apertures0.1 mm, 0.3 mm
Available gasesCO, N2, O2, H2, CO2, Ethane, Ethene, Propane, Butane, User-defined. Any mixture of aforementioned. Fully automatic dosing system
Max flow rate20 sccm
ManipulationX, Y, Z.
NE, 20 deg incidence

Analyser

TypeScienta Hipp-3 analyser capable of recording XPS at pressures up to 50 mbar
Energy Resolution
Spatial resolution20 µm
DetectorCCD camera
DLD (planned)
sampling rate70 Hz
120 Hz
Available Slits
Available Pass Energies
ModesTransmission, Angular resolution, Spatial resolution