Volume 71, Issue 2, February 2000
Index of content:
- NEGATIVE ION SOURCES FOR FUSION (III)
71(2000); http://dx.doi.org/10.1063/1.1150435View Description Hide Description
Effects of cesium vapor injection on production in a tandem volume source are studied numerically as a function of plasma parameters. Model calculation is performed by solving a set of particle balance equations for steady-state hydrogen discharge plasmas. Here, the results with a focus on gas pressure dependence of volume production are presented and discussed. Considering surface production due to H atoms and positive hydrogen ions, enhancement of production and pressure dependence of production observed experimentally are qualitatively well reproduced in the model calculation, where stripping loss in the extraction and acceleration regions is taken into account. For pressure dependence of production with cesium, i.e., decrease in optimum pressure, H atoms play an important role. For enhancement of production, effect of so-called electron cooling is also briefly discussed.
71(2000); http://dx.doi.org/10.1063/1.1150436View Description Hide Description
In the RHIC spin experiment, the high intensity polarized ion source is requested. The required luminosity in RHIC can be obtained with a 0.5 mA injected ion beam intensity. In order to realize such beam intensity, a KEK optically pumped polarized ion source is being upgraded at TRIUMF for future installation at RHIC. The first results of polarization measurements are presented here.