NEC offers a high resolution Rutherford backscattering (HR RBS) detection system as an optional addition to our IBA analysis endstation, model RC43. The RC43 combines automated data acquisition with sample positioning and data analysis to provide capabilities for several MeV IBA techniques.
This detector system provides a factor of more than 10 times improvement in energy resolution — and subsequently depth resolution — compared to the standard solid state detector in the IBA analysis endstation.
The HR RBS detection system is designed for an incoming He+ beam of up to 500 keV. This is easily accomplished with our standard IBA Pelletron accelerator systems.
The system consists of:
Mounted on tracks, the system can easily be repositioned between the 90° port or the 45° port of the IBA endstation.
Although this system was developed for use on the RC43 IBA endstation, it can be configured to fit to other scattering chambers. Please contact NEC for further information.
The following sketch shows the HR RBS system attached to the RC43 IBA endstation with optional detectors for RBS, ERDA, NRA, HPGe, PIXE, and Ion Beam Induced Luminescence. An in air beam system is also optional.
The approximate energy resolution of the system is about 1 keV, compared to about 15 keV for a standard solid state detector, providing a significant improvement in both energy resolution and depth resolution.
The detector can be accurately positioned for small angle grazing measurements, such as ERDA measurements of hydrogen concentrations in surface layers.