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Large Helical Device: History & Science

The Large Helical Device (大型ヘリカル装置, Ōgata Herikaru Sōchi) (LHD) is a fusion research device located in Toki, Gifu, Japan. It is operated by the National Institute for Fusion Science, and is the world's second-largest superconducting stellarator, after Wendelstein 7-X. The LHD employs a heliotron magnetic field originally developed in Japan.

Language: English [EN]
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Large Helical Device topic overview

The analysis highlights History and Science as prominent areas in the source structure around Large Helical Device.

Related topics
16
Source areas
2
Connected nodes
18
Extracted relationships
18
Concept neighborhoods
15
Bridge connections
18

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 15 topics
History · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Location
Toki, Japan
Affiliation
National Institute for Fusion Science
Device type
Heliotron
Magnetic field
3.0 T (30,000 G)
Major radius
3.9 m (13 ft)
Minor radius
0.6 m (2 ft 0 in)

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

History

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Large Helical Device connects Entity context

The extracted context around Large Helical Device shows recurring relationship patterns in the source. For example, Large Helical Device → Christmas Day, Design, In, MW, The Large Helical Device, To, Using Another extracted example is Large Helical Device → Dense Core, Harris, Large Helical Device WebsiteSuper, LHD. Use these groups to spot repeated connection types before inspecting the individual relationships.

Large Helical Device

Top relations

related to history · 7
Large Helical Device → Christmas Day, Design, In, MW, The Large Helical Device, To, Using
related to External links · 4
Large Helical Device → Dense Core, Harris, Large Helical Device WebsiteSuper, LHD
Affiliation · 1
Large Helical Device → National Institute for Fusion Science
Device type · 1
Large Helical Device → Heliotron
Location · 1
Large Helical Device → Toki, Japan
Magnetic field · 1
Large Helical Device → 3.0 T (30,000 G)
Major radius · 1
Large Helical Device → 3.9 m (13 ft)
Minor radius · 1
Large Helical Device → 0.6 m (2 ft 0 in)
Year(s) of operation · 1
Large Helical Device → 1998–2025

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

helical plasma lhd fusion large field divertor japan research device exhaust system national heliotron uses heat toki institute science magnetic

Large Helical Device relationships Subject–Predicate–Object triples

TTTA extracted 18 structured relationships around Large Helical Device. Examples in this analysis include Large Helical Device → Affiliation → National Institute for Fusion Science and Large Helical Device → Device type → Heliotron. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Large Helical DeviceAffiliationNational Institute for Fusion Science1.00infobox
Large Helical DeviceDevice typeHeliotron1.00infobox
Large Helical DeviceLocationToki, Japan1.00infobox
Large Helical DeviceMagnetic field3.0 T (30,000 G)1.00infobox
Large Helical DeviceMajor radius3.9 m (13 ft)1.00infobox
Large Helical DeviceMinor radius0.6 m (2 ft 0 in)1.00infobox
Large Helical DeviceYear(s) of operation1998–20251.00infobox
Large Helical Devicerelated to External linksLarge Helical Device WebsiteSuper0.60section
Large Helical Devicerelated to External linksDense Core0.60section
Large Helical Devicerelated to External linksLHD0.60section
Large Helical Devicerelated to External linksHarris0.60section
Large Helical Devicerelated to historyDesign0.60section

Related concept clusters Concept neighborhoods

The concept neighborhoods around Large Helical Device bring nearby vocabulary together. In this analysis, examples include Large, Device and Helical. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Large Helical Device
    • Large
    • Device
    • Helical
    • Japan
    • Operation
    • Toki
    • Fusion
    • Lhd
    • National
    • Plasma
    • Field
    • Divertor
  • large helical device
    • Large
    • Japan
    • Device
    • Helical
    • Operation
    • Toki
    • Fusion
    • Lhd
    • Research
    • National
    • Plasma
    • Field
  • national institute for fusion science
    • Science
    • Institute
    • National
    • Operated
    • Stellarator
    • Superconducting
    • Helical
    • Japan
    • Large
    • Beam
    • Heliotron
    • Injection
  • fusion
    • National
    • Helical
    • Japan
    • Large
    • Institute
    • Lhd
    • Science
    • Toki
    • Research
    • Plasma
    • Gifu
    • Herikaru
  • helical
    • Large
    • Device
    • Fusion
    • Lhd
    • Research
    • Japan
    • Plasma
    • Operation
    • Toki
    • Divertor
    • Exhaust
    • National
  • toki, gifu
    • Herikaru
    • Located
    • Sōchi
    • Ōgata
    • 大型ヘリカル装置
    • Toki
    • Beam
    • Heliotron
    • Injection
    • Institute
    • Magnetic
    • Neutral
  • magnetic field
    • Heliotron
    • Magnetic
    • Divertor
    • Japan
    • Neutral
    • Operation
    • Operations
    • Science
    • Toki
    • Large
    • Lhd
    • National
  • neutral beam injection
    • Injection
    • Neutral
    • Tokamaks
    • Heat
    • Heliotron
    • Institute
    • Lhd
    • Magnetic
    • Operation
    • Operations
    • Plasma
    • Science

Connections between topic areas Semantic bridges

For Large Helical Device, one of the stronger structural bridges in this analysis connects Large Helical Device with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Large Helical Device — Overview · splits 3 ⟂ 16

Map overview Semantic statistics

Large Helical Device

Nodes19
Edges18
Triples18
Avg. degree1.89
Density0.105263
Components1

Source & methodology

TTTA analyzes the structure around Large Helical Device to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History & Science, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Large Helical Device · EN edition · Analysis: TopicsToTalkAbout

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