Energetic negative ion source for fusion at NIFS (invited)

T. Kuroda; O. Kaneko; Y. Takeiri; Y. Oka; K. Tsumori; E. Asano; T. Kawamoto; R. Akiyama; A. Ando; T. Takanashi; M. Hamabe

doi:10.1063/1.1146854

Energetic negative ion source for fusion at NIFS (invited)

T. Kuroda, O. Kaneko, Y. Takeiri, Y. Oka, K. Tsumori, E. Asano, T. Kawamoto, R. Akiyama, A. Ando, T. Takanashi, M. Hamabe

ENG - Electrical Engineering

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

9 Citations (Scopus)

Abstract

Large high current hydrogen negative ion sources have been developed for the negative ion based neutral beam injector of the Large Helical Device (LHD) at NIFS. The prototype of the negative ion source is required to deliver a negative ion beam of 45 A at the beam energy of 125 keV. The optimization of 1/3 scale ion sources which are multicusp ion source with a rod and an external magnetic filter, respectively, has been investigated for the operation parameter of the plasma source. A total H⁻ current of 16 A is extracted at an operating pressure of 0.9–0.45 Pa with Cs seeding operation. Negative hydrogen ion current is proportional to the input arc power and a beam current density of 45 mA/cm² is attained. The beam extraction and acceleration characteristics are studied for a single‐stage and a two‐stage acceleration electrode. A beam divergence angle of 5 mrad is obtained. The results of research and development of a hydrogen negative ion source at NIFS will be reviewed.

Original language	English
Pages (from-to)	1114-1119
Number of pages	6
Journal	Review of Scientific Instruments
Volume	67
Issue number	3
DOIs	https://doi.org/10.1063/1.1146854
Publication status	Published - 1996 Mar

Keywords

AMP BEAM CURRENTS
BEAM EXTRACTION
BEAM PROFILES
HYDROGEN IONS 1 MINUS
ION SOURCES
KEV RANGE 100−1000
NEUTRAL ATOM BEAM INJECTION
PLASMA
TORSATRON STELLARATORS

ASJC Scopus subject areas

Instrumentation

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10.1063/1.1146854

Cite this

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title = "Energetic negative ion source for fusion at NIFS (invited)",

abstract = "Large high current hydrogen negative ion sources have been developed for the negative ion based neutral beam injector of the Large Helical Device (LHD) at NIFS. The prototype of the negative ion source is required to deliver a negative ion beam of 45 A at the beam energy of 125 keV. The optimization of 1/3 scale ion sources which are multicusp ion source with a rod and an external magnetic filter, respectively, has been investigated for the operation parameter of the plasma source. A total H− current of 16 A is extracted at an operating pressure of 0.9–0.45 Pa with Cs seeding operation. Negative hydrogen ion current is proportional to the input arc power and a beam current density of 45 mA/cm2 is attained. The beam extraction and acceleration characteristics are studied for a single‐stage and a two‐stage acceleration electrode. A beam divergence angle of 5 mrad is obtained. The results of research and development of a hydrogen negative ion source at NIFS will be reviewed.",

keywords = "AMP BEAM CURRENTS, BEAM EXTRACTION, BEAM PROFILES, HYDROGEN IONS 1 MINUS, ION SOURCES, KEV RANGE 100−1000, NEUTRAL ATOM BEAM INJECTION, PLASMA, TORSATRON STELLARATORS",

author = "T. Kuroda and O. Kaneko and Y. Takeiri and Y. Oka and K. Tsumori and E. Asano and T. Kawamoto and R. Akiyama and A. Ando and T. Takanashi and M. Hamabe",

year = "1996",

month = mar,

doi = "10.1063/1.1146854",

language = "English",

volume = "67",

pages = "1114--1119",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics Publising LLC",

number = "3",

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TY - JOUR

T1 - Energetic negative ion source for fusion at NIFS (invited)

AU - Kuroda, T.

AU - Kaneko, O.

AU - Takeiri, Y.

AU - Oka, Y.

AU - Tsumori, K.

AU - Asano, E.

AU - Kawamoto, T.

AU - Akiyama, R.

AU - Ando, A.

AU - Takanashi, T.

AU - Hamabe, M.

PY - 1996/3

Y1 - 1996/3

N2 - Large high current hydrogen negative ion sources have been developed for the negative ion based neutral beam injector of the Large Helical Device (LHD) at NIFS. The prototype of the negative ion source is required to deliver a negative ion beam of 45 A at the beam energy of 125 keV. The optimization of 1/3 scale ion sources which are multicusp ion source with a rod and an external magnetic filter, respectively, has been investigated for the operation parameter of the plasma source. A total H− current of 16 A is extracted at an operating pressure of 0.9–0.45 Pa with Cs seeding operation. Negative hydrogen ion current is proportional to the input arc power and a beam current density of 45 mA/cm2 is attained. The beam extraction and acceleration characteristics are studied for a single‐stage and a two‐stage acceleration electrode. A beam divergence angle of 5 mrad is obtained. The results of research and development of a hydrogen negative ion source at NIFS will be reviewed.

AB - Large high current hydrogen negative ion sources have been developed for the negative ion based neutral beam injector of the Large Helical Device (LHD) at NIFS. The prototype of the negative ion source is required to deliver a negative ion beam of 45 A at the beam energy of 125 keV. The optimization of 1/3 scale ion sources which are multicusp ion source with a rod and an external magnetic filter, respectively, has been investigated for the operation parameter of the plasma source. A total H− current of 16 A is extracted at an operating pressure of 0.9–0.45 Pa with Cs seeding operation. Negative hydrogen ion current is proportional to the input arc power and a beam current density of 45 mA/cm2 is attained. The beam extraction and acceleration characteristics are studied for a single‐stage and a two‐stage acceleration electrode. A beam divergence angle of 5 mrad is obtained. The results of research and development of a hydrogen negative ion source at NIFS will be reviewed.

KW - AMP BEAM CURRENTS

KW - BEAM EXTRACTION

KW - BEAM PROFILES

KW - HYDROGEN IONS 1 MINUS

KW - ION SOURCES

KW - KEV RANGE 100−1000

KW - NEUTRAL ATOM BEAM INJECTION

KW - PLASMA

KW - TORSATRON STELLARATORS

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DO - 10.1063/1.1146854

M3 - Article

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SN - 0034-6748

VL - 67

SP - 1114

EP - 1119

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 3

ER -

Energetic negative ion source for fusion at NIFS (invited)

Abstract

Keywords

ASJC Scopus subject areas

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