{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:BRMTCY3KOLH3N6ZW2XQLOZXCEQ","short_pith_number":"pith:BRMTCY3K","canonical_record":{"source":{"id":"2211.04901","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-03T09:47:08Z","cross_cats_sorted":[],"title_canon_sha256":"599b35a3d2160a06d421f89f36dc8577aa5e185d24c50619dcfc7c82e41d35ea","abstract_canon_sha256":"de8646c30e07309e2078b8b0f025786cc46020fcc6d3b6f7a2ece5e7ca177baf"},"schema_version":"1.0"},"canonical_sha256":"0c5931636a72cfb6fb36d5e0b766e22401aa9cd2f79593efab4faa8a169e97f5","source":{"kind":"arxiv","id":"2211.04901","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.04901","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"arxiv_version","alias_value":"2211.04901v2","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.04901","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"pith_short_12","alias_value":"BRMTCY3KOLH3","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"pith_short_16","alias_value":"BRMTCY3KOLH3N6ZW","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"pith_short_8","alias_value":"BRMTCY3K","created_at":"2026-07-05T06:33:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:BRMTCY3KOLH3N6ZW2XQLOZXCEQ","target":"record","payload":{"canonical_record":{"source":{"id":"2211.04901","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-03T09:47:08Z","cross_cats_sorted":[],"title_canon_sha256":"599b35a3d2160a06d421f89f36dc8577aa5e185d24c50619dcfc7c82e41d35ea","abstract_canon_sha256":"de8646c30e07309e2078b8b0f025786cc46020fcc6d3b6f7a2ece5e7ca177baf"},"schema_version":"1.0"},"canonical_sha256":"0c5931636a72cfb6fb36d5e0b766e22401aa9cd2f79593efab4faa8a169e97f5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:33:03.159066Z","signature_b64":"0gxCXbdsU+/CturZjbTRmCUbT04VUQk46Xs3barqtdt6gzHlorfzw7GcbhoSMv0j4jeqpl6XBqKu1JdaXC6FDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0c5931636a72cfb6fb36d5e0b766e22401aa9cd2f79593efab4faa8a169e97f5","last_reissued_at":"2026-07-05T06:33:03.158478Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:33:03.158478Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2211.04901","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:33:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OmyWv/LnnCgy+siXb6CzRx9WAPoJ8THgGWO6R2OXd1f6JIlmiDdZfdUxbp6FqdT11Jf2f2OzQ6RS+Ztzb1ZoDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T16:23:39.173195Z"},"content_sha256":"496522c50f11cc2301636762416f0ca31dffbc27e917918f54a97ec22005b1a4","schema_version":"1.0","event_id":"sha256:496522c50f11cc2301636762416f0ca31dffbc27e917918f54a97ec22005b1a4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:BRMTCY3KOLH3N6ZW2XQLOZXCEQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Characterization of cesium and H-/D- density in the negative ion source SPIDER","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"A. Rizzolo, E. Sartori, G. Casati, G. Serianni, L. Baldini, Marco Barbisan, M. Fadone, R. Agnello, R. Pasqualotto","submitted_at":"2022-11-03T09:47:08Z","abstract_excerpt":"The Heating Neutral Beam Injectors (HNBs) for ITER will have to deliver 16.7 MW beams of H/D particles at 1 MeV energy. The beams will be produced from H-/D- ions, generated by a radiofrequency plasma source coupled to an ion acceleration system. A prototype of the ITER HNB ion source is being tested in the SPIDER experiment, part of the ITER Neutral Beam Test Facility at Consorzio RFX. Reaching the design targets for beam current density and fraction of coextracted electrons is only possible by evaporating cesium in the source, in particular on the plasma facing grid (PG) of the acceleration "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.04901","kind":"arxiv","version":2},"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/2211.04901/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":"2026-07-05T06:33:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"toVfY296+Qmh0v0lkWQzFh/k8XDpACCUPcehLx6yXM1T7bY+Bg6X4yRkE1QUnSBC5Y4CTYl7y4mf2ELIhk6DBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T16:23:39.173587Z"},"content_sha256":"1e9ab9e10e8820660a7c13d215bb9993a10a9a9dcd71ddf48f19c68cf2357a9d","schema_version":"1.0","event_id":"sha256:1e9ab9e10e8820660a7c13d215bb9993a10a9a9dcd71ddf48f19c68cf2357a9d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BRMTCY3KOLH3N6ZW2XQLOZXCEQ/bundle.json","state_url":"https://pith.science/pith/BRMTCY3KOLH3N6ZW2XQLOZXCEQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BRMTCY3KOLH3N6ZW2XQLOZXCEQ/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":"2026-07-06T16:23:39Z","links":{"resolver":"https://pith.science/pith/BRMTCY3KOLH3N6ZW2XQLOZXCEQ","bundle":"https://pith.science/pith/BRMTCY3KOLH3N6ZW2XQLOZXCEQ/bundle.json","state":"https://pith.science/pith/BRMTCY3KOLH3N6ZW2XQLOZXCEQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BRMTCY3KOLH3N6ZW2XQLOZXCEQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:BRMTCY3KOLH3N6ZW2XQLOZXCEQ","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":"de8646c30e07309e2078b8b0f025786cc46020fcc6d3b6f7a2ece5e7ca177baf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-03T09:47:08Z","title_canon_sha256":"599b35a3d2160a06d421f89f36dc8577aa5e185d24c50619dcfc7c82e41d35ea"},"schema_version":"1.0","source":{"id":"2211.04901","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.04901","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"arxiv_version","alias_value":"2211.04901v2","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.04901","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"pith_short_12","alias_value":"BRMTCY3KOLH3","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"pith_short_16","alias_value":"BRMTCY3KOLH3N6ZW","created_at":"2026-07-05T06:33:03Z"},{"alias_kind":"pith_short_8","alias_value":"BRMTCY3K","created_at":"2026-07-05T06:33:03Z"}],"graph_snapshots":[{"event_id":"sha256:1e9ab9e10e8820660a7c13d215bb9993a10a9a9dcd71ddf48f19c68cf2357a9d","target":"graph","created_at":"2026-07-05T06:33:03Z","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/2211.04901/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Heating Neutral Beam Injectors (HNBs) for ITER will have to deliver 16.7 MW beams of H/D particles at 1 MeV energy. The beams will be produced from H-/D- ions, generated by a radiofrequency plasma source coupled to an ion acceleration system. A prototype of the ITER HNB ion source is being tested in the SPIDER experiment, part of the ITER Neutral Beam Test Facility at Consorzio RFX. Reaching the design targets for beam current density and fraction of coextracted electrons is only possible by evaporating cesium in the source, in particular on the plasma facing grid (PG) of the acceleration ","authors_text":"A. Rizzolo, E. Sartori, G. Casati, G. Serianni, L. Baldini, Marco Barbisan, M. Fadone, R. Agnello, R. Pasqualotto","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-03T09:47:08Z","title":"Characterization of cesium and H-/D- density in the negative ion source SPIDER"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.04901","kind":"arxiv","version":2},"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":"sha256:496522c50f11cc2301636762416f0ca31dffbc27e917918f54a97ec22005b1a4","target":"record","created_at":"2026-07-05T06:33:03Z","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":"de8646c30e07309e2078b8b0f025786cc46020fcc6d3b6f7a2ece5e7ca177baf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-03T09:47:08Z","title_canon_sha256":"599b35a3d2160a06d421f89f36dc8577aa5e185d24c50619dcfc7c82e41d35ea"},"schema_version":"1.0","source":{"id":"2211.04901","kind":"arxiv","version":2}},"canonical_sha256":"0c5931636a72cfb6fb36d5e0b766e22401aa9cd2f79593efab4faa8a169e97f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c5931636a72cfb6fb36d5e0b766e22401aa9cd2f79593efab4faa8a169e97f5","first_computed_at":"2026-07-05T06:33:03.158478Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:33:03.158478Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0gxCXbdsU+/CturZjbTRmCUbT04VUQk46Xs3barqtdt6gzHlorfzw7GcbhoSMv0j4jeqpl6XBqKu1JdaXC6FDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T06:33:03.159066Z","signed_message":"canonical_sha256_bytes"},"source_id":"2211.04901","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:496522c50f11cc2301636762416f0ca31dffbc27e917918f54a97ec22005b1a4","sha256:1e9ab9e10e8820660a7c13d215bb9993a10a9a9dcd71ddf48f19c68cf2357a9d"],"state_sha256":"56f8a0d6f71a71bf3b53726d7bd5d1c4e9f4a79fd679c7fb89db188c2f52ed78"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tm0N9oJeXz/C51unpkp6AhMj8SbJ69burjEAGVEC/lje/LyhnNAiFy1gxlpgxl/WWpnxYK5GmIYexvdd3OEmBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T16:23:39.175469Z","bundle_sha256":"f487c8c664eaafa8d9d46b189ea4420e936f9b7215c2985d4ab3a66fb291de2d"}}