The new ICE (Ions in Coincidence with Electrons) endstation is a mobile facility to be used by the MAX IV LDM community at a variety of beamlines. At FlexPES it can be placed at the first focal point of the LDM branch (upstream the permanent LDM-PES endstation).


By using a combination of multi-coincidence and momentum imaging techniques and linearly polarized soft x-rays, it will be possible to obtain complete kinematic information on specific dissociation channels in a reaction – affording insight into the interplay between competing decay processes, the role of nuclear motion in a decay process and the relevant time-scales.


Experimental chamber

Geometry & materialsCAMP – type vacuum chamber
316LN ESR stainless steel
Base pressure1⋅10-9mbar
Sample delivery systemsExternal (refer to information under “sample delivery systems” )
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)
MBES: Magnetic Bottle Electron spectrometer (see below for further details)


REMI spectrometer

Max operating pressure1⋅10-6mbar
DescriptionRoentDek spectrometer
Adjustable in length (5 cm to 1m)
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
- Electrons: 15 eV
- Ions (+1 or -1): 10 eV

(Currently under commissioning)
Magnetic FieldHelmholtz coils (uncooled)
Maximum recommended B-field : 0.5 mT
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
Compatible BL’sFlexPES, FinEstBeAMS, …


MBES (detail to follow…)