IPAC2015 - List of Authors (Barrows, P.)

Paper	Title	Page
WEPJE011	High Reliability, Long Lifetime, Continuous Wave H⁻ Ion Source	2695
	P. Barrows, G.E. Becerra PNL, Madison, Wisconsin, USA
	Funding: Small Business Innovation Research (SBIR) Phase II Phoenix Nuclear Labs (PNL) is developing a high-current, long-lifetime negative hydrogen (H⁻) ion source in partnership with Fermilab as part of an ion beam injector for future Intensity Frontier particle accelerators. In this application, continuous output with long lifetime and high reliability and efficiency are critical. Existing ion sources at Fermilab rely on plasma-facing electrodes and are limited to lifetimes of a few hundred hours, while requiring relatively high gas loads on downstream components. PNL's H⁻ ion source uses an electrodeless microwave plasma generator which has been extensively developed in PNL's positive ion source systems, demonstrating 1000+ hours of operation and >99% continuous uptime. A magnetic filter preferentially blocks energetic electrons produced in the plasma, while allowing cold electrons and fast neutrals through toward a cesiated surface converter to produce the desired H⁻ ions, which are extracted into a low energy beam using electrostatic lenses. The design specifications are 5-10 mA of continuous H⁻ current at 30 keV with <0.2 pi-mm-mrad beam emittance. Construction and testing of the H⁻ ion source is underway at PNL.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPJE011
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Paper

Title

Page

High Reliability, Long Lifetime, Continuous Wave H⁻ Ion Source

2695

P. Barrows, G.E. Becerra
PNL, Madison, Wisconsin, USA

Funding: Small Business Innovation Research (SBIR) Phase II
Phoenix Nuclear Labs (PNL) is developing a high-current, long-lifetime negative hydrogen (H⁻) ion source in partnership with Fermilab as part of an ion beam injector for future Intensity Frontier particle accelerators. In this application, continuous output with long lifetime and high reliability and efficiency are critical. Existing ion sources at Fermilab rely on plasma-facing electrodes and are limited to lifetimes of a few hundred hours, while requiring relatively high gas loads on downstream components. PNL's H⁻ ion source uses an electrodeless microwave plasma generator which has been extensively developed in PNL's positive ion source systems, demonstrating 1000+ hours of operation and >99% continuous uptime. A magnetic filter preferentially blocks energetic electrons produced in the plasma, while allowing cold electrons and fast neutrals through toward a cesiated surface converter to produce the desired H⁻ ions, which are extracted into a low energy beam using electrostatic lenses. The design specifications are 5-10 mA of continuous H⁻ current at 30 keV with <0.2 pi-mm-mrad beam emittance. Construction and testing of the H⁻ ion source is underway at PNL.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPJE011

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)