A method to produce lithium pellets for fueling and ELM pacing in NSTX-U

Daniel Andruczyk; A. L. Roquemore; P. Fiflis; D. Mansfield; David N Ruzic

doi:10.1016/j.fusengdes.2014.07.005

A method to produce lithium pellets for fueling and ELM pacing in NSTX-U

Daniel Andruczyk, A. L. Roquemore, P. Fiflis, D. Mansfield, David N Ruzic

Research output: Contribution to journal › Article › peer-review

Abstract

A device for producing small, high frequency spherical droplets or pellets for lithium or other liquid metals has been developed and could aid in the controlled excitation or pacing of edge-localized plasma modes (ELMs). The Liquid Lithium/metal Pellet Injector (LLPI) could also be used to replenish lithium coatings of plasma-facing components (PFCs) during a plasma discharge. With NSTX-U having longer pulse lengths (up to 5 s), it is desirable to be able to inject lithium during the discharge to maintain the beneficial effects. Using a nozzle injector design and a surrogate to lithium, Wood's metal, the LLPI has achieved droplet diameters between 0.6 mm < d_drop < 1 mm in diameter and frequencies up to 1.5 kHz with argon gas driving the formation. This paper presents the LLPI being developed with initial results mainly using Wood's metal and some lithium, using high pressure argon to force the liquid lithium through the nozzle.

Original language	English (US)
Pages (from-to)	2910-2914
Number of pages	5
Journal	Fusion Engineering and Design
Volume	89
Issue number	12
DOIs	https://doi.org/10.1016/j.fusengdes.2014.07.005
State	Published - Dec 1 2014

Keywords

Liquid metal
Lithium
NSTX-U
Plasma facing components
Plasma material interactions
Wood's metal

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear Energy and Engineering
General Materials Science
Mechanical Engineering

Online availability

10.1016/j.fusengdes.2014.07.005

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title = "A method to produce lithium pellets for fueling and ELM pacing in NSTX-U",

abstract = "A device for producing small, high frequency spherical droplets or pellets for lithium or other liquid metals has been developed and could aid in the controlled excitation or pacing of edge-localized plasma modes (ELMs). The Liquid Lithium/metal Pellet Injector (LLPI) could also be used to replenish lithium coatings of plasma-facing components (PFCs) during a plasma discharge. With NSTX-U having longer pulse lengths (up to 5 s), it is desirable to be able to inject lithium during the discharge to maintain the beneficial effects. Using a nozzle injector design and a surrogate to lithium, Wood's metal, the LLPI has achieved droplet diameters between 0.6 mm < ddrop < 1 mm in diameter and frequencies up to 1.5 kHz with argon gas driving the formation. This paper presents the LLPI being developed with initial results mainly using Wood's metal and some lithium, using high pressure argon to force the liquid lithium through the nozzle.",

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AU - Roquemore, A. L.

AU - Fiflis, P.

AU - Mansfield, D.

AU - Ruzic, David N

PY - 2014/12/1

Y1 - 2014/12/1

N2 - A device for producing small, high frequency spherical droplets or pellets for lithium or other liquid metals has been developed and could aid in the controlled excitation or pacing of edge-localized plasma modes (ELMs). The Liquid Lithium/metal Pellet Injector (LLPI) could also be used to replenish lithium coatings of plasma-facing components (PFCs) during a plasma discharge. With NSTX-U having longer pulse lengths (up to 5 s), it is desirable to be able to inject lithium during the discharge to maintain the beneficial effects. Using a nozzle injector design and a surrogate to lithium, Wood's metal, the LLPI has achieved droplet diameters between 0.6 mm < ddrop < 1 mm in diameter and frequencies up to 1.5 kHz with argon gas driving the formation. This paper presents the LLPI being developed with initial results mainly using Wood's metal and some lithium, using high pressure argon to force the liquid lithium through the nozzle.

AB - A device for producing small, high frequency spherical droplets or pellets for lithium or other liquid metals has been developed and could aid in the controlled excitation or pacing of edge-localized plasma modes (ELMs). The Liquid Lithium/metal Pellet Injector (LLPI) could also be used to replenish lithium coatings of plasma-facing components (PFCs) during a plasma discharge. With NSTX-U having longer pulse lengths (up to 5 s), it is desirable to be able to inject lithium during the discharge to maintain the beneficial effects. Using a nozzle injector design and a surrogate to lithium, Wood's metal, the LLPI has achieved droplet diameters between 0.6 mm < ddrop < 1 mm in diameter and frequencies up to 1.5 kHz with argon gas driving the formation. This paper presents the LLPI being developed with initial results mainly using Wood's metal and some lithium, using high pressure argon to force the liquid lithium through the nozzle.

KW - Liquid metal

KW - Lithium

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KW - Plasma facing components

KW - Plasma material interactions

KW - Wood's metal

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A method to produce lithium pellets for fueling and ELM pacing in NSTX-U

Abstract

Keywords

ASJC Scopus subject areas

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