Multichannel SDD Spectrometer for XRF, XRD and EDX
The Rococo System
is based on the monolithic 4-channel annular SDD sensor geometry which allows placing the detector very close to the sample, with the exciting beam passing the central hole. The result is a huge solid angle coverage of the analyzed sample and a significant reduction of the measurement time. The compact preamplifier and power supply electronics ensure the best energy resolution of 125 eV FWHM@ Mn-Ka and enable easy and compact integration into any experimental systems.
Based on Rococo SDD series
Key Features
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4-channel SDD system for high count rates up to 4 Mcps with excellent energy resolution values.
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Ultra large solid angle values up to 2.3 sr.
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Highest sensitivity without shadowing effects in case of topological samples.
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Integrated power supply box for providing SDD bias voltages, temperature control and synchronous reset operation of all 4 detector channels.
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Integrated water-cooling circuit to be easily connected to a common water chiller.
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Available in customized configurations for applications such as Nanoprobe XRF at synchrotron facilities, PIXE, ED-XRD, EDX in Electron Microscopy.
Rococo System with Retractable Arm
Working principle of Rococo Detector Head
Solid angle plotted against the distance between sample and detector chip for both Rococo 2 and Rococo 3
Energy resolution versus processing time measured with all 4 channels of Rococo2 Detector
SEM EDX elemental mapping of iron and kaolinite powder on carbon – almost shadowless by using the different channels
Rococo System with vacuum flange and supply unit – Dimensions
Rococo 2/3 configurations
For vacuum:
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with counter flange for mounting on vacuum chambers
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with or without external light filter
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horizontal or 45° angled version for flexible vacuum chamber configurations
For atmospheric applications:
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detector head sealed with external windows (BeW or Planar Thin windows) and continously evacuated by external vacuum pump
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horizontal version suitable for narrow space applications
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45° angled version suitable for analysis of large samples, e.g. wafers
Rococo for ambient conditions
Rococo with angled tip
Rococo Ambient and Angled over wafer disc
All Rococo configurations are possible with Rococo2 and Rococo3 sensor, as well as in straight and angled version. Please see table below for window choices in vacuum or ambient conditions.
| Kind of Window | Vacuum | Ambient |
|---|---|---|
| Open module | x | |
| Light tight | x | x |
| Light suppressing | x | x |
Further Spectrometer Components
Multi-channel Digital Processor generates the spectra from the 4 analogue output signals. Four operation modes are possible: Single Spectrum, Mapping, Fast LIST and LIST-Map Modes in a triggered or non-triggered configuration. Find more information here.
