ERDA/RBS beam line

ERDA/RBS chamber is located after the PIXE chamber on the beam line connected to the -10° exit port of the accelerator. It houses needed mechanical sample holder and detectors for application of two IBA methods that rely on energy analysis of scattered particles, ERDA and RBS. In ERDA (Elastic Recoil Detection Analysis) one detects lighter particles from a target sample that are ejected by incident ions from the probing beam. In RBS (Rutherford Back Scattering) method one detects projectile ions backscattered from nuclei in the target sample. Absolute atomic concentration depth profiles are determined by these methods. ERDA allows determination of light constituents such as hydrogen and deuterium in solid samples, while RBS is used for measuring heavier constituents.

Time-of-flight ERDA is housed in an additional arm attached to this measuring station.

ERDA principle

RBS and ERDA were recently used for profiling of thin planar structures and studies of depth profiles of hydrogen and deuterium on fusion relevant materials. Verification of measurement precision of hydrogen concentration in standard sample was performed within recent round robin inter-comparison organized by IAEA, Vienna. For specific studies of H and D reactions on the surfaces of fusion relevant materials a special hydrogen exposure cell was constructed that allows in situ studies of surface reactions.

ERDA/RBS beam line has been reconstructed in 2007 in order to improving ion beam control, sample manipulation and vacuum quality. New quadrupol lens together with beam deflector and UHV vacuum chamber with externally driven sample displacement facility were incorporated into the beam line. Vacuum chamber and some of the beam control elements were previously in use at the EC-JRC-IRMM, Geel, Belgium.

Contact person:

Dr. Iztok Čadež

Last updated: 01/22/2014