The ICE (Ions in Coincidence with Electrons) end station is a mobile end station that is designed to be compatible with a number of MAX IV LDM-relevant beamlines. By using a combination of multi-coincidence and momentum imaging techniques along with the linearly/circularly/elliptically polarized soft x-rays delivered by the beamlines, it will be possible to investigate photo-induced reactions and to obtain kinematic information on specific dissociation channels of gas phase molecules and clusters – affording insight into the interplay between competing decay processes, the role of nuclear motion in a decay process, charge transfer processes and the relevant time-scales involved.

The ICE REMI (REaction MIcroscope) is currently in-commissioning.

Experimental chamber

Geometry & materialsCAMP – type vacuum chamber
316LN ESR stainless steel
Base pressure1⋅10-9mbar
Sample delivery systemsExternal: Molecular Jet/Cluster source (refer to 'LDM Sample Delivery Systems' for more information)
Beam size at sample
(at FlexPES)
Defocused (h x v): up to 2 x 1.5 mm
Focused (h x v): 75 x 15 μm; further reduction in size is possible with baffles (at the cost of flux)
Compatible beamlinesFlexPES, FinEstBeAMS, FemtoMAX, ...
ICE spectrometersREMI: Reaction Microscope spectrometer (see below for further details)
Planned: MBES (Magnetic Bottle Electron Spectrometer)

 

REMI spectrometer

Max operating pressure1⋅10-6mbar
DescriptionRoentDek spectrometer
Current length: 1 m.
Adjustable in electrostatic field geometry
ModesRIMS (low voltage fields)
- Requires single-bunch mode
- Static E-fields : a few V/cm
- B-field (with Helmholtz coils): see below
REMI (higher voltage fields)
- Static E-fields : some 100’s V/cm
Max KE’s detected (foreseen) RIMS
- Electrons: 100 eV
- Ions: at least 20 eV
REMI
- Electrons: 15 eV
- Ions (+1 or -1): 10 eV

(Currently in commissioning, information will be updated after commissioning)
Magnetic FieldHelmholtz coils (uncooled)
Maximum recommended B-field : 0.5 mT (higher B fields can be generated with the coils)
Detectors2 x HEX 100 – 75 detectors (100 mm HEX delay lines and 75 mm MCP’s OAR 70%)
Electronics8-channel fast timing amplifier unit for detector signals, FAMP 8
fADC4/10-4: 10-bit flash ADC system for advanced multi-hit readout of HEX detectors (with PC via PCIe) and associated software
SoftwareCobold PC
Data format.lmf
HDF5 format under development (project in final stages)
Compatible BL’sFlexPES, Veritas, foreseen for use at FinEstBeAMS in the future.

 

MBES (detail to follow…)