50 Hz deuterium pellet injector for EAST tokamak

Igor Vinyar; Jiansheng Hu; Alexander Lukin; Jiangang Li; Xinjia Yao; Changzheng Li; Yue Chen; Pavel Reznichenko

doi:10.1016/j.fusengdes.2014.11.008

50 Hz deuterium pellet injector for EAST tokamak

Igor Vinyar
, Jiansheng Hu
, Alexander Lukin
, Jiangang Li
, Xinjia Yao
, Changzheng Li
, Yue Chen
, Pavel Reznichenko

School of Electrical Engineering

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

10 Scopus citations

Abstract

A new high frequency pellet injector has been developed for edge localized mode mitigation and plasma fuelling of the EAST tokamak. The pellet injector consists of two independent modules operating at 1-25 Hz. Both modules are equipped with screw extruders cooled by liquid helium for solid deuterium ice production at steady state mode. An innovative pellet fabrication and acceleration system has been designed and applied to reduce gas load on the extruders in 4-5 times and to increase the pellet injection reliability. Pellets of 1.5 mm diameter and 1.5 mm length were injected at 250 ± 50 m/s velocity at 25 Hz with reliability over 93% using one module in preliminary tests. Two modules working in turn are under tests now. It is anticipated they will be able to inject pellets at 50 Hz after further technical improvements in near future.

Original language	English
Pages (from-to)	1898-1901
Number of pages	4
Journal	Fusion Engineering and Design
Volume	98-99
DOIs	https://doi.org/10.1016/j.fusengdes.2014.11.008
State	Published - 1 Oct 2015

Keywords

ELM mitigation
Pellet fuelling
Pellet injector

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10.1016/j.fusengdes.2014.11.008

Cite this

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title = "50 Hz deuterium pellet injector for EAST tokamak",

abstract = "A new high frequency pellet injector has been developed for edge localized mode mitigation and plasma fuelling of the EAST tokamak. The pellet injector consists of two independent modules operating at 1-25 Hz. Both modules are equipped with screw extruders cooled by liquid helium for solid deuterium ice production at steady state mode. An innovative pellet fabrication and acceleration system has been designed and applied to reduce gas load on the extruders in 4-5 times and to increase the pellet injection reliability. Pellets of 1.5 mm diameter and 1.5 mm length were injected at 250 ± 50 m/s velocity at 25 Hz with reliability over 93\% using one module in preliminary tests. Two modules working in turn are under tests now. It is anticipated they will be able to inject pellets at 50 Hz after further technical improvements in near future.",

keywords = "ELM mitigation, Pellet fuelling, Pellet injector",

author = "Igor Vinyar and Jiansheng Hu and Alexander Lukin and Jiangang Li and Xinjia Yao and Changzheng Li and Yue Chen and Pavel Reznichenko",

year = "2015",

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doi = "10.1016/j.fusengdes.2014.11.008",

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T1 - 50 Hz deuterium pellet injector for EAST tokamak

AU - Vinyar, Igor

AU - Hu, Jiansheng

AU - Lukin, Alexander

AU - Li, Jiangang

AU - Yao, Xinjia

AU - Li, Changzheng

AU - Chen, Yue

AU - Reznichenko, Pavel

PY - 2015/10/1

Y1 - 2015/10/1

N2 - A new high frequency pellet injector has been developed for edge localized mode mitigation and plasma fuelling of the EAST tokamak. The pellet injector consists of two independent modules operating at 1-25 Hz. Both modules are equipped with screw extruders cooled by liquid helium for solid deuterium ice production at steady state mode. An innovative pellet fabrication and acceleration system has been designed and applied to reduce gas load on the extruders in 4-5 times and to increase the pellet injection reliability. Pellets of 1.5 mm diameter and 1.5 mm length were injected at 250 ± 50 m/s velocity at 25 Hz with reliability over 93% using one module in preliminary tests. Two modules working in turn are under tests now. It is anticipated they will be able to inject pellets at 50 Hz after further technical improvements in near future.

AB - A new high frequency pellet injector has been developed for edge localized mode mitigation and plasma fuelling of the EAST tokamak. The pellet injector consists of two independent modules operating at 1-25 Hz. Both modules are equipped with screw extruders cooled by liquid helium for solid deuterium ice production at steady state mode. An innovative pellet fabrication and acceleration system has been designed and applied to reduce gas load on the extruders in 4-5 times and to increase the pellet injection reliability. Pellets of 1.5 mm diameter and 1.5 mm length were injected at 250 ± 50 m/s velocity at 25 Hz with reliability over 93% using one module in preliminary tests. Two modules working in turn are under tests now. It is anticipated they will be able to inject pellets at 50 Hz after further technical improvements in near future.

KW - ELM mitigation

KW - Pellet fuelling

KW - Pellet injector

UR - https://www.scopus.com/pages/publications/84942521820

U2 - 10.1016/j.fusengdes.2014.11.008

DO - 10.1016/j.fusengdes.2014.11.008

M3 - 文章

AN - SCOPUS:84942521820

SN - 0920-3796

VL - 98-99

SP - 1898

EP - 1901

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

50 Hz deuterium pellet injector for EAST tokamak

Abstract

Keywords

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