Experimental study of ion beam optics in a two-stage accelerator
Abstract
Hydrogen ion beam optics in a two-stage linear acceleration system is studied by examining the beam divergence as a function of the voltage and gap distribution, the beam perveance, the background gas pressure, the aspect ratio, and the total accelerating energy (60-110 keV). The system consists of four electrodes with single, cylindrical, straight-bore apertures acting as an extraction-accel-decel column. An optimum relation between the field ratio and the extraction perveance is obtained from measurements for the minimum beam divergence condition. The HWHM divergence angle is <0.3° under optimum conditions. Qualitative agreement between the measurements and a previous theoretical study is noticed. A potential application of the results to high energy neutral beam injectors for fusion research is also discussed.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- February 1979
- DOI:
- 10.1063/1.1135787
- Bibcode:
- 1979RScI...50..201K
- Keywords:
-
- High Energy Interactions;
- Hydrogen Ions;
- Ion Accelerators;
- Ion Beams;
- Neutral Beams;
- Test Facilities;
- Aspect Ratio;
- Fusion Reactors;
- Gas Pressure;
- Nuclear Research;
- Space Charge;
- Volt-Ampere Characteristics;
- Instrumentation and Photography;
- 29.15.Dt;
- 29.25.Fb