{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:JREYS5A2U672KRP3IOIL2UZ7QV","short_pith_number":"pith:JREYS5A2","canonical_record":{"source":{"id":"2606.26513","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-06-25T01:36:42Z","cross_cats_sorted":[],"title_canon_sha256":"087cef1905d14a93560b54affbea181f423ab0054589352b150cc1738ef2d8dd","abstract_canon_sha256":"2fa7c61520d961f55adbceaa1f8ddbdee75998dbaf5c4bc19438eeb8a787c15d"},"schema_version":"1.0"},"canonical_sha256":"4c4989741aa7bfa545fb4390bd533f854eaa4352122918dff21b8b81b8084fb9","source":{"kind":"arxiv","id":"2606.26513","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.26513","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"arxiv_version","alias_value":"2606.26513v1","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.26513","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"pith_short_12","alias_value":"JREYS5A2U672","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"pith_short_16","alias_value":"JREYS5A2U672KRP3","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"pith_short_8","alias_value":"JREYS5A2","created_at":"2026-06-26T01:15:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:JREYS5A2U672KRP3IOIL2UZ7QV","target":"record","payload":{"canonical_record":{"source":{"id":"2606.26513","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-06-25T01:36:42Z","cross_cats_sorted":[],"title_canon_sha256":"087cef1905d14a93560b54affbea181f423ab0054589352b150cc1738ef2d8dd","abstract_canon_sha256":"2fa7c61520d961f55adbceaa1f8ddbdee75998dbaf5c4bc19438eeb8a787c15d"},"schema_version":"1.0"},"canonical_sha256":"4c4989741aa7bfa545fb4390bd533f854eaa4352122918dff21b8b81b8084fb9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-26T01:15:33.194787Z","signature_b64":"OKWTNqZTX30BKHQNSeKZriI2p6abWmPFJTuhIJpcxmecZLKSMa47XeA43kU3dc0ayoRfAaut1039fl6aH8dEAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4c4989741aa7bfa545fb4390bd533f854eaa4352122918dff21b8b81b8084fb9","last_reissued_at":"2026-06-26T01:15:33.194384Z","signature_status":"signed_v1","first_computed_at":"2026-06-26T01:15:33.194384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.26513","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-26T01:15:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m9vDfEhlWnB50MnTHuAP+abVme8o5rkyeRrsblPOsSyO3XpuADnH0eePE0zNplYv3LXrYG+At8WJGeAwhIfZCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T16:33:17.830887Z"},"content_sha256":"d6ab2dc831a7e5fd63bf7d438b415b12b932f12afc1e0fd75055f68d17cd23d8","schema_version":"1.0","event_id":"sha256:d6ab2dc831a7e5fd63bf7d438b415b12b932f12afc1e0fd75055f68d17cd23d8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:JREYS5A2U672KRP3IOIL2UZ7QV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Negative Triangularity Tokamak Path for Fusion Pilot Plants: Experimental Progress and Future Prospects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"A. Hyatt, A. Marinoni, A. O. Nelson, B. Vanovac, C. A. Paz-Soldan, F. Scotti, K. E. Thome, M. E. Austin, O. Sauter, S. Coda, T. Odstr\\v{c}il","submitted_at":"2026-06-25T01:36:42Z","abstract_excerpt":"This paper reviews the experimental progress of negative triangularity (NT), a tokamak configuration where the poloidal cross-section is a reversed-D shape compared to the conventional positive triangularity (PT) shape. NT is a promising reactor scenario that addresses the fundamental tension between performance, exhaust, and robustness. NT studies have accelerated globally across these three pillars over the past several years. While tokamak pilot plants are typically designed for the standard PT H-mode regime, this approach faces significant challenges in balancing high core performance with"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.26513","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.26513/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-26T01:15:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fcqWvZOwfUhQy7zg0V/bOeMU85jFR7D7I035WXUsUv24PfCtMFXE3IUdWLxwMBkyXEOKWMA92yOD770xaoYmAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T16:33:17.831261Z"},"content_sha256":"88e536289c8a7f422f1f5667918eec6a6dbe85146cc9034e64f5c7dc7928e09c","schema_version":"1.0","event_id":"sha256:88e536289c8a7f422f1f5667918eec6a6dbe85146cc9034e64f5c7dc7928e09c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JREYS5A2U672KRP3IOIL2UZ7QV/bundle.json","state_url":"https://pith.science/pith/JREYS5A2U672KRP3IOIL2UZ7QV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JREYS5A2U672KRP3IOIL2UZ7QV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-26T16:33:17Z","links":{"resolver":"https://pith.science/pith/JREYS5A2U672KRP3IOIL2UZ7QV","bundle":"https://pith.science/pith/JREYS5A2U672KRP3IOIL2UZ7QV/bundle.json","state":"https://pith.science/pith/JREYS5A2U672KRP3IOIL2UZ7QV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JREYS5A2U672KRP3IOIL2UZ7QV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:JREYS5A2U672KRP3IOIL2UZ7QV","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"2fa7c61520d961f55adbceaa1f8ddbdee75998dbaf5c4bc19438eeb8a787c15d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-06-25T01:36:42Z","title_canon_sha256":"087cef1905d14a93560b54affbea181f423ab0054589352b150cc1738ef2d8dd"},"schema_version":"1.0","source":{"id":"2606.26513","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.26513","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"arxiv_version","alias_value":"2606.26513v1","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.26513","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"pith_short_12","alias_value":"JREYS5A2U672","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"pith_short_16","alias_value":"JREYS5A2U672KRP3","created_at":"2026-06-26T01:15:33Z"},{"alias_kind":"pith_short_8","alias_value":"JREYS5A2","created_at":"2026-06-26T01:15:33Z"}],"graph_snapshots":[{"event_id":"sha256:88e536289c8a7f422f1f5667918eec6a6dbe85146cc9034e64f5c7dc7928e09c","target":"graph","created_at":"2026-06-26T01:15:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.26513/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper reviews the experimental progress of negative triangularity (NT), a tokamak configuration where the poloidal cross-section is a reversed-D shape compared to the conventional positive triangularity (PT) shape. NT is a promising reactor scenario that addresses the fundamental tension between performance, exhaust, and robustness. NT studies have accelerated globally across these three pillars over the past several years. While tokamak pilot plants are typically designed for the standard PT H-mode regime, this approach faces significant challenges in balancing high core performance with","authors_text":"A. Hyatt, A. Marinoni, A. O. Nelson, B. Vanovac, C. A. Paz-Soldan, F. Scotti, K. E. Thome, M. E. Austin, O. Sauter, S. Coda, T. Odstr\\v{c}il","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-06-25T01:36:42Z","title":"The Negative Triangularity Tokamak Path for Fusion Pilot Plants: Experimental Progress and Future Prospects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.26513","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d6ab2dc831a7e5fd63bf7d438b415b12b932f12afc1e0fd75055f68d17cd23d8","target":"record","created_at":"2026-06-26T01:15:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"2fa7c61520d961f55adbceaa1f8ddbdee75998dbaf5c4bc19438eeb8a787c15d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-06-25T01:36:42Z","title_canon_sha256":"087cef1905d14a93560b54affbea181f423ab0054589352b150cc1738ef2d8dd"},"schema_version":"1.0","source":{"id":"2606.26513","kind":"arxiv","version":1}},"canonical_sha256":"4c4989741aa7bfa545fb4390bd533f854eaa4352122918dff21b8b81b8084fb9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4c4989741aa7bfa545fb4390bd533f854eaa4352122918dff21b8b81b8084fb9","first_computed_at":"2026-06-26T01:15:33.194384Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-26T01:15:33.194384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OKWTNqZTX30BKHQNSeKZriI2p6abWmPFJTuhIJpcxmecZLKSMa47XeA43kU3dc0ayoRfAaut1039fl6aH8dEAg==","signature_status":"signed_v1","signed_at":"2026-06-26T01:15:33.194787Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.26513","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d6ab2dc831a7e5fd63bf7d438b415b12b932f12afc1e0fd75055f68d17cd23d8","sha256:88e536289c8a7f422f1f5667918eec6a6dbe85146cc9034e64f5c7dc7928e09c"],"state_sha256":"2cae0e2c4ebdef1e0f20655d3237de9c081875ea0a23ac2fb994f796b0698cb2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rnqbttKJUMVKzhuXI2aWqiFQsl0+zS57iEj7bG9hkWXe4ahff7kWFUzRR7zFP5o+JiF9HZT5DoAhHBQORKPHAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T16:33:17.833465Z","bundle_sha256":"36ce87dddde76332289599388a5204bd9473dc69982e617f431ddf5aae06368a"}}