{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:UG3DA4NLKY4C54ICO57XPSAHWE","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":"283de2317157777a67f0a855b36d8ce280d7905fc332685335454968ead826ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2025-08-18T13:53:40Z","title_canon_sha256":"89eed289e252b589aa83d1bdb1a18c38fc7c1f57c596711d9aa13d207784a295"},"schema_version":"1.0","source":{"id":"2508.12929","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.12929","created_at":"2026-07-05T11:55:29Z"},{"alias_kind":"arxiv_version","alias_value":"2508.12929v1","created_at":"2026-07-05T11:55:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.12929","created_at":"2026-07-05T11:55:29Z"},{"alias_kind":"pith_short_12","alias_value":"UG3DA4NLKY4C","created_at":"2026-07-05T11:55:29Z"},{"alias_kind":"pith_short_16","alias_value":"UG3DA4NLKY4C54IC","created_at":"2026-07-05T11:55:29Z"},{"alias_kind":"pith_short_8","alias_value":"UG3DA4NL","created_at":"2026-07-05T11:55:29Z"}],"graph_snapshots":[{"event_id":"sha256:d82aae6d21285bb7fbaecee8a1beaaab27b4c752e756860b584945970919dc9e","target":"graph","created_at":"2026-07-05T11:55:29Z","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/2508.12929/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Helicon plasmas are being considered as plasma sources for wakefield accelerators, subject to strict density requirements. We present various mechanisms to increase axial density homogeneity in a helicon plasma for implementation in such an accelerator. We consider various background neutral flow configurations for helicons generated with first one antenna and then two identical antennas in a 2 meter long, 52 mm diameter plasma chamber with homogeneous magnetic field. In the case of a single antenna, the ionization source rate and density profiles are not significantly influenced by the backgr","authors_text":"Marcel Granetzny, Michael Zepp, Oliver Schmitz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2025-08-18T13:53:40Z","title":"Density and Particle Sourcing Optimization in a Helicon Plasma Source Prototype For Wakefield Accelerator Applications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.12929","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:cde7ec960f8f743fdf5a25723a81f1a62a059bfaddee4f19320e994f75ed5e2b","target":"record","created_at":"2026-07-05T11:55:29Z","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":"283de2317157777a67f0a855b36d8ce280d7905fc332685335454968ead826ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2025-08-18T13:53:40Z","title_canon_sha256":"89eed289e252b589aa83d1bdb1a18c38fc7c1f57c596711d9aa13d207784a295"},"schema_version":"1.0","source":{"id":"2508.12929","kind":"arxiv","version":1}},"canonical_sha256":"a1b63071ab56382ef102777f77c807b1173cd468da45502ed3aea4e6049c9c16","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1b63071ab56382ef102777f77c807b1173cd468da45502ed3aea4e6049c9c16","first_computed_at":"2026-07-05T11:55:29.384539Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:55:29.384539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w53EpogVPp6UauuVtHTUirXI72HGOLm6sngJUOPg1RUPdqFN43aGXN/nJU8AVXXCgdyYXNSiCzwP5aWABlQfAw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:55:29.385005Z","signed_message":"canonical_sha256_bytes"},"source_id":"2508.12929","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cde7ec960f8f743fdf5a25723a81f1a62a059bfaddee4f19320e994f75ed5e2b","sha256:d82aae6d21285bb7fbaecee8a1beaaab27b4c752e756860b584945970919dc9e"],"state_sha256":"e177afa63b425568e9f46e90d53b577a00386b11e907c373d5ae4fdfb69e9c50"}