Optimum current densities from high current H{sup {minus}} and D{sup {minus}} sources
The tandem system, with the electron energy distribution arranged spatially and with electron energies decreasing toward the exit aperture, will generate a five-fold enhancement in extracted current density when compared to an optimal single-chamber system. With the increased understanding of the underlying atomic processes, together with a body of experience in the operation high-power hydrogen and deuterium discharges, it has now become possible to specify in absolute terms the optimal current-density performance of a hydrogen/deuterium system. A variation on the single-chamber and tandem systems has been purposed that employs a single-chamber, pulsed discharge. Following the discharge pulse, the transient variation of the electron energy distribution allows for a more optimal generation of negative ions than does the static single-chamber system. Some of the limitations of this system when compared with the steady-state tandem system are discussed here.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10177436
- Report Number(s):
- UCRL-JC-112224; CONF-921145-9; ON: DE93018070; TRN: 93:018923
- Resource Relation:
- Conference: Production and neutralization of negative ions and beams,Upton, NY (United States),9-13 Nov 1992; Other Information: PBD: 4 Nov 1992
- Country of Publication:
- United States
- Language:
- English
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Optimum extracted H[sup [minus]] and D[sup [minus]] current densities from gas-pressure-limited high-power hydrogen/deuterium tandem ion sources
Optimum extracted H{sup {minus}} and D{sup {minus}} current densities from gas-pressure-limited high-power hydrogen/deuterium tandem ion sources