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Recent progress of high-power negative ion beam development for fusion plasma heating

Abstract

A negative-ion-based neutral beam injector (N-NBI) has been constructed for JT-60U. The N-NBI is designed to inject 500 keV, 10 MW neutral beams using two ion sources, each producing a 500 keV, 22 A D{sup -} ion beam. Beam acceleration test started in July, 1995 using one ion source. In the preliminary experiment, D{sup -} ion beam of 13.5 A has been successfully accelerated with an energy of 400 keV (5.4 MW) for 0.12 s at an operating pressure of 0.22 Pa. This is the highest D{sup -} beam current and power in the world. Co-extracted electron current was effectively suppressed to the ratio of Ie/I{sub D}- <1. The highest energy beam of 460 keV, 2.4 A, 0.44 s has also been obtained. Neutral beam injection starts in March, 1996 using two ion sources. To realize 1 MeV class NBI system for ITER (International Thermonuclear Experimental Reactor), demonstration of ampere class negative ion beam acceleration up to 1 MeV is an important mile stone. To achieve the mile stone, a high energy test facility called MeV Test Facility (MTF) was constructed. The system consists of a 1 MV, 1 A acceleration power supply and a 100 kW power supply system  More>>
Authors:
Watanabe, Kazuhiro; Akino, Noboru; Aoyagi, Tetsuo [1] 
  1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment; and others
Publication Date:
Mar 01, 1997
Product Type:
Conference
Report Number:
JAERI-Conf-97-003; CONF-9603254-
Reference Number:
SCA: 700460; PA: JPN-97:010109; EDB-98:041399; SN: 98001890452
Resource Relation:
Journal Volume: 49; Journal Issue: 6; Conference: 7. international symposium on advanced nuclear energy research, Takasaki (Japan), 18-20 Mar 1996; Other Information: PBD: Mar 1997; Related Information: Is Part Of Recent progress in accelerator beam application. Proceedings of the 7th international symposium on advanced nuclear energy research; PB: 553 p.
Subject:
70 PLASMA PHYSICS AND FUSION; BEAM INJECTION HEATING; KEV RANGE 100-1000; POWER RANGE 10-100 MW; ION SOURCES; ANIONS; HYDROGEN ISOTOPES; IONIC COMPOSITION; BEAM OPTICS; BEAM TRANSPORT; POWER SUPPLIES; SURGES; VOLTAGE REGULATORS; JT-60U TOKAMAK; ITER TOKAMAK
OSTI ID:
588349
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0969-806X; Other: ON: DE97764433; TRN: JP9710109
Availability:
OSTI as DE97764433
Submitting Site:
JPN
Size:
pp. 155-160
Announcement Date:
May 08, 1998

Citation Formats

Watanabe, Kazuhiro, Akino, Noboru, and Aoyagi, Tetsuo. Recent progress of high-power negative ion beam development for fusion plasma heating. Japan: N. p., 1997. Web. doi:10.1016/S0969-806X(97)00012-1.
Watanabe, Kazuhiro, Akino, Noboru, & Aoyagi, Tetsuo. Recent progress of high-power negative ion beam development for fusion plasma heating. Japan. doi:10.1016/S0969-806X(97)00012-1.
Watanabe, Kazuhiro, Akino, Noboru, and Aoyagi, Tetsuo. 1997. "Recent progress of high-power negative ion beam development for fusion plasma heating." Japan. doi:10.1016/S0969-806X(97)00012-1. https://www.osti.gov/servlets/purl/10.1016/S0969-806X(97)00012-1.
@misc{etde_588349,
title = {Recent progress of high-power negative ion beam development for fusion plasma heating}
author = {Watanabe, Kazuhiro, Akino, Noboru, and Aoyagi, Tetsuo}
abstractNote = {A negative-ion-based neutral beam injector (N-NBI) has been constructed for JT-60U. The N-NBI is designed to inject 500 keV, 10 MW neutral beams using two ion sources, each producing a 500 keV, 22 A D{sup -} ion beam. Beam acceleration test started in July, 1995 using one ion source. In the preliminary experiment, D{sup -} ion beam of 13.5 A has been successfully accelerated with an energy of 400 keV (5.4 MW) for 0.12 s at an operating pressure of 0.22 Pa. This is the highest D{sup -} beam current and power in the world. Co-extracted electron current was effectively suppressed to the ratio of Ie/I{sub D}- <1. The highest energy beam of 460 keV, 2.4 A, 0.44 s has also been obtained. Neutral beam injection starts in March, 1996 using two ion sources. To realize 1 MeV class NBI system for ITER (International Thermonuclear Experimental Reactor), demonstration of ampere class negative ion beam acceleration up to 1 MeV is an important mile stone. To achieve the mile stone, a high energy test facility called MeV Test Facility (MTF) was constructed. The system consists of a 1 MV, 1 A acceleration power supply and a 100 kW power supply system for negative ion production. Up to now, an H{sup -} ion beam was accelerated up to the energy of 805 keV with an acceleration drain current of 150 mA for 1 s in a five stage electrostatic multi-aperture accelerator. (author)}
doi = {10.1016/S0969-806X(97)00012-1}
issue = {6}
volume = {49}
place = {Japan}
year = {1997}
month = {Mar}
}