The NEC ion beam analysis (IBA) endstation (model RC43) is a versatile accessory for Pelletrons or other ion beam accelerators.
When combined with a Pelletron accelerator and associated ion source and beamline components, the IBA endstation provides a complete IBA system, offering automatic data collection. The system can perform qualitative analysis using multiple techniques simultaneously such as RBS, ERD, NRA and PIXE.
The RC43 endstation is capable of many IBA techniques, each of which have a long list of applications. Detectors can be included for the following techniques:
NEC also offers a microprobe for beam sizes of 20 microns and external beam capabilities.
The scattering chamber is constructed primarily from aluminum. It has a view port, target alignment laser, and video camera. The base of the chamber provides stable support for the target manipulator, solid state particle detector, beam collimator, and turbo-molecular pump. A target load lock is placed in the lid to permit quick (less than 5 minute) changes of target holders while maintaining high vacuum.
The chamber can accommodate up to 16 samples, 1 cm x 1 cm, side by side. It is electrically isolated and can be used as a Faraday cup for precise beam current measurements.
The NEC IBA endstation incorporates a 5-axis sample manipulator with a motorized rotary drive. This manipulator allows precise control of target movement in the X, Y, and Z directions with polar and azimuthal rotation. The rotary drive includes five stepper motors. The samples are positioned by the control computer, which controls all five motors simultaneously. Local control of the manipulator is also available when adding samples.
A digital current integrator is provided to measure total ion beam currents and provide gate signals for the RBS or NRA measurements by monitoring total ion current on the target.
A turbo-molecular pump and forepump are furnished to pump the target chamber and beamline near the chamber and the target load lock. Solenoid and pneumatic valves with appropriate controllers and gauges are provided to automatically pump out or vent the chamber.
Sample positioning and data acquisition with the IBA endstation is accomplished with a remote control system. This control system includes software for both qualitative and quantitative analysis.
The IBA endstation’s Analytical Data Collection software performs qualitative analysis.
The RUMP program developed by L.R. Doolittle of Cornell University, as well as other analysis programs, performs quantitative analysis.
The IBA endstation control system also communicates with the accelerator control system itself, receiving beam energy information and sending instructions to produce the optimal beam conditions during real time runs.
NEC also offers a high resolution RBS detector system. This detector adds the capability of Ångstrom range depth profiling.
The standard IBA Endstation includes a Silicon Surface Barrier detector and a detector preamplifier with digital pulse processor for RBS analysis.
Additional detectors available include: