ARPES_Endstation_sketch

Analysis chamber

Base pressure10-11mbar
Sample manipulation6-axis CARVING LHe manipulator with integrated
3 translations: x,y = ±25 mm, z = 500 mm
3 rotations: 360° polar rotation, ±30° tilt and 360° azimuthal rotation
SourceEPU 84mm APPLE II type
HeatingDirect current heating in one azimuthal orientation
CoolingLN2: not verified
LHe: ~20K
Residual magnetic fieldDouble μ-metal liner < 0.1μT
CharacterizationOmicronScienta 3-grid SPECTRALEED
Polarimeter
RGA
Electron gun

Main preparation chamber

Base pressure8⋅10-11mbar
Sample manipulation4-axis Prevac LHe open cycle manipulator
Sputter gunYes
HeatingElectron beam
Resistive
Direct current
CoolingLN2: not verified
LHe: 40-50K
CharacterizationOmicronScienta 3-grid SPECTRALEED
Thickness monitor
RGA
Wobble stick for cleaving
Deposition3 quick install deposition source ports CF 40
Additional CF40 ports
Dosing2 leak valves
OtherPossibility to attach vacuum suitcase

Secondary preparation chamber

Base pressure8⋅10-11mbar
Sample manipulation4-axis Prevac LN2 manipulator
Sputter gunYes
HeatingElectron beam
Resistive
CoolingLN2: not verified
CharacterizationThickness monitor
RGA
Wobble stick for cleaving
DepositionAdditional CF40 ports for user supplied evaporation sources
DosingLeak valve
OtherPossibility to attach vacuum suitcase
Inner liner for heavy evaporations (remove and replace)

Transfer chamber

Base pressure8⋅10-11mbar
Type8-port RDC
Thermally isolated 2 sample transfer carrier
Semi automatic
Cooling stageLN2 - for cold transfers between chambers
Load lock6 sample carousel
3 positions for resistive heating 3 positions for direct heating
Port for vacuum suitcase
Sample storageCapacity: 12 samples

Analyzer

TypeScientaOmicron DA30-L
Energy resolution< 1.8 meV FWHM at 2 eV pass energy and 20 eV kinetic energy
Angular resolution< 0.1 degree
Detector40 mm MCP/CCD
Slits0.2s, 0.3s, 0.5s, 0.8s, 1.5s, 2.5s with aperture
0.1s, 0.2s, 0.3s without aperture
(s = straight)
ModesTransmission
Angular
   ±3.5°,±7°,±15°
Deflection
   Θx:±15°,Θy:±12°
   Θx:±7°,Θy:±7°
   Θx: ± 3.5°, Θy:± 3.5°

STM

ModelScientaOmicron VT-STM XA
HeatingIndirect radiative heating up to 500K
CoolingLHe or LN2, down to 50K
OtherTip preparation tool
Sample storage carousel