Isotope and Cs vapor effects in an H sup minus volume source with a toroidal chamber
Conference
·
OSTI ID:6778484
A volume source of H{sup {minus}} ions, with a full rotational symmetry, has been designed and studied. We have achieved a pulsed H{sup {minus}} current of 50 mA, at a current density of 25 mA/cm{sup 2}. Using a reduced aperture of 1 cm{sup 2}, the emittance of a 10--16 keV beam was measured for different source parameters, and for a beam current of 20 mA it was found to be less than 0.5 {pi} mm mrad (normalized, 4 rms). When operating with deuterium, the D{sup {minus}} output was found to be 50--60% of the H{sup {minus}} current obtained under the same discharge conditions. Adding cesium to the discharge increased the H{sup {minus}} output by a factor of two, while reducing the electron current. After the addition of cesium, greater than 30 mA of H{sup {minus}} could be extracted with I{sub e}/I{sub H}{sup {minus}}.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6778484
- Report Number(s):
- BNL-43645; CONF-900603--16; ON: DE90013734
- Country of Publication:
- United States
- Language:
- English
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