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        "title": "Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X",
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      "scope": "The Wendelstein 7-X team used pellet-fuelled 2018 stellarator discharges to test whether magnetic-field optimization reduced neoclassical energy transport. A team report describes one high-performance discharge with 4.5 MW heating and about 0.23 s energy confinement. From measured density and temperature profiles and modeled transport, the authors infer that similarly scaled less-optimized configurations would have required more heating to sustain the profiles. In a separate longer discharge, stable detached divertor operation with particle exhaust was maintained for over 26 seconds at 5 MW. The comparison of neoclassical losses uses measured profiles and modeled reference magnetic configurations, not direct simultaneous measurements in the other machines. The high-performance pellet-fuelled phase lasted less than a second; it is not the same demonstration as the longer detached discharge. Turbulent transport and impurity buildup remain concerns. This does not establish a sustained high-performance reactor or net electricity. The source is a 2021 team overview. The original journal analysis, its correction and the diagnostic data may add qualifications to the overview.",
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        "description": "The comparison of neoclassical losses uses measured profiles and modeled reference magnetic configurations, not direct simultaneous measurements in the other machines. The high-performance pellet-fuelled phase lasted less than a second; it is not the same demonstration as the longer detached discharge. Turbulent transport and impurity buildup remain concerns. This does not establish a sustained high-performance reactor or net electricity. The source is a 2021 team overview. The original journal analysis, its correction and the diagnostic data may add qualifications to the overview.",
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      "statement": "# Wendelstein 7-X tests optimized stellarator energy confinement\n\nThe Wendelstein 7-X team used pellet-fuelled 2018 stellarator discharges to test whether magnetic-field optimization reduced neoclassical energy transport. A team report describes one high-performance discharge with 4.5 MW heating and about 0.23 s energy confinement. From measured density and temperature profiles and modeled transport, the authors infer that similarly scaled less-optimized configurations would have required more heating to sustain the profiles. In a separate longer discharge, stable detached divertor operation with particle exhaust was maintained for over 26 seconds at 5 MW.\n\n## Scientific scope\n\nThe comparison of neoclassical losses uses measured profiles and modeled reference magnetic configurations, not direct simultaneous measurements in the other machines. The high-performance pellet-fuelled phase lasted less than a second; it is not the same demonstration as the longer detached discharge. Turbulent transport and impurity buildup remain concerns. This does not establish a sustained high-performance reactor or net electricity. The source is a 2021 team overview. The original journal analysis, its correction and the diagnostic data may add qualifications to the overview.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\n\n\nCredit belongs to the cited collaborations. The individual author list is incomplete; no sole discoverer or individual effort share is inferred.\n\n\n\n## Original sources\n\n- [Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X](https://arxiv.org/pdf/2105.04002v1)\n",
      "summary": "The Wendelstein 7-X team used pellet-fuelled 2018 stellarator discharges to test whether magnetic-field optimization reduced neoclassical energy transport. A team report describes one high-performance discharge with 4.5 MW heating and about 0.23 s energy confinement. From measured density and temperature profiles and modeled transport, the authors infer that similarly scaled less-optimized configurations would have required more heating to sustain the profiles. In a separate longer discharge, stable detached divertor operation with particle exhaust was maintained for over 26 seconds at 5 MW.",
      "title": "Wendelstein 7-X tests optimized stellarator energy confinement"
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    "title": "Wendelstein 7-X tests optimized stellarator energy confinement",
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    "what_changed": "The Wendelstein 7-X team used pellet-fuelled 2018 stellarator discharges to test whether magnetic-field optimization reduced neoclassical energy transport. A team report describes one high-performance discharge with 4.5 MW heating and about 0.23 s energy confinement. From measured density and temperature profiles and modeled transport, the authors infer that similarly scaled less-optimized configurations would have required more heating to sustain the profiles. In a separate longer discharge, stable detached divertor operation with particle exhaust was maintained for over 26 seconds at 5 MW.",
    "scope": "The Wendelstein 7-X team used pellet-fuelled 2018 stellarator discharges to test whether magnetic-field optimization reduced neoclassical energy transport. A team report describes one high-performance discharge with 4.5 MW heating and about 0.23 s energy confinement. From measured density and temperature profiles and modeled transport, the authors infer that similarly scaled less-optimized configurations would have required more heating to sustain the profiles. In a separate longer discharge, stable detached divertor operation with particle exhaust was maintained for over 26 seconds at 5 MW. The comparison of neoclassical losses uses measured profiles and modeled reference magnetic configurations, not direct simultaneous measurements in the other machines. The high-performance pellet-fuelled phase lasted less than a second; it is not the same demonstration as the longer detached discharge. Turbulent transport and impurity buildup remain concerns. This does not establish a sustained high-performance reactor or net electricity. The source is a 2021 team overview. The original journal analysis, its correction and the diagnostic data may add qualifications to the overview.",
    "evidence_summary": "The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The comparison of neoclassical losses uses measured profiles and modeled reference magnetic configurations, not direct simultaneous measurements in the other machines. The high-performance pellet-fuelled phase lasted less than a second; it is not the same demonstration as the longer detached discharge. Turbulent transport and impurity buildup remain concerns. This does not establish a sustained high-performance reactor or net electricity. The source is a 2021 team overview. The original journal analysis, its correction and the diagnostic data may add qualifications to the overview.",
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