Multicusp ion source with external rf antenna for production of protons

Hahto, S. K.; Ji, Qing; Leung, K. N.; Wilde, S.; Foley, E. L.; Grisham, L.; Levinton, F. M.

doi:10.1063/1.1642744

Cited by 17 publications

(7 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different antenna configurations have been used in rfdriven ion sources: internal antenna, 1 external helical antenna, 2,3 and external planar antenna. 4 Lifetime has always been an issue for internal antenna.…”

Section: Introductionmentioning

confidence: 99%

Radio frequency-driven proton source with a back-streaming electron dump

Kwan

2010

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

This article describes an rf ion source with a back-streaming electron dump. A quartz tube, brazed to a metal plug at one end, is fused in the center of a flat quartz plate. rf power (at 13.6 MHz) is coupled to generate hydrogen plasma using a planar external antenna bonded to the window. Bonding the water-cooled rf antenna to the quartz window significantly lowers its temperature. The water-cooled metal plug serves as the back-streaming electron dump. At 1800 W, the current density of extracted hydrogen ions reaches approximately 125 mA/cm(2).

show abstract

Section: Introductionmentioning

confidence: 99%

Radio frequency-driven proton source with a back-streaming electron dump

Kwan

2010

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

show abstract

“…Over 85% of atomic ion species has been demonstrated. [12], [13] However, they typically need to be operated at around 10 mT. Lower pressure operation is only possible with large discharge chamber (over 13 cm in diameter [14] with multi-cusp magnet confinement).…”

Section: Ion Sourcementioning

confidence: 99%

Initial Testing of a Compact Portable Microwave-Driven Neutron Generator

Regis

et al. 2009

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

A portable, moderate yield D-D neutron generator based on permanent magnet microwave ion source is being developed at Lawrence Berkeley National Laboratory for applications such as short range SNM detection in suitcases and small parcels. Microwave power (2.45 GHz) can be coupled to a pyrex tube through a standard wave guide and generate plasma. In this source configuration, the wave guide serves as a secondary containment for sealed tube design. Hydrogen plasma has been successfully ignited in the pyrex tube at a microwave power of 200 W. The 2.45 GHz microwave signal can also be directly coupled to the wave guide through a standard coaxial cable with a N-type connection and generate plasma. Preliminary results show that over 60% of atomic hydrogen ions were generated at a microwave power of 300 W. Higher atomic fraction is expected with insertion of boron nitride liner. The current density at power of 200 W (with an extraction aperture of 2 mm in diameter, and gas flow at 0.2 sccm) was approximately 22 mA/cm 2 .Index Terms-Microwave ion source, neutron generator.

show abstract

“…Unfortunately both of these configurations suffer from the drawback of short operating lifetimes. The source described here is based on a previous multicusp ion source design developed at LBNL for proton production that uses an external antenna wound around a cylindrical quartz chamber [3]. This kind of ion sources with external RF antennas have been demonstrated to produce high negative ion current, while maintaining long operating lifetime [4].…”

Section: Introductionmentioning

confidence: 99%