{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:YIR4HAJ6UCBCLS3ZTRKZDCV332","short_pith_number":"pith:YIR4HAJ6","canonical_record":{"source":{"id":"2211.04790","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-09T10:34:47Z","cross_cats_sorted":[],"title_canon_sha256":"4827ee06d9d6b40dfc0f2a8421cc3605f97a3b969312465e0b9303e80c7a6835","abstract_canon_sha256":"3abbc00a3dec4088e5b6ca2f9aa19766911bcd0ca3ef5a86eba3d96a74a4bb9f"},"schema_version":"1.0"},"canonical_sha256":"c223c3813ea08225cb799c55918abbde906a6f99454bdaca92819f601d79e5e0","source":{"kind":"arxiv","id":"2211.04790","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.04790","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"arxiv_version","alias_value":"2211.04790v1","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.04790","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"pith_short_12","alias_value":"YIR4HAJ6UCBC","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"pith_short_16","alias_value":"YIR4HAJ6UCBCLS3Z","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"pith_short_8","alias_value":"YIR4HAJ6","created_at":"2026-07-05T05:14:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:YIR4HAJ6UCBCLS3ZTRKZDCV332","target":"record","payload":{"canonical_record":{"source":{"id":"2211.04790","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-09T10:34:47Z","cross_cats_sorted":[],"title_canon_sha256":"4827ee06d9d6b40dfc0f2a8421cc3605f97a3b969312465e0b9303e80c7a6835","abstract_canon_sha256":"3abbc00a3dec4088e5b6ca2f9aa19766911bcd0ca3ef5a86eba3d96a74a4bb9f"},"schema_version":"1.0"},"canonical_sha256":"c223c3813ea08225cb799c55918abbde906a6f99454bdaca92819f601d79e5e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:14:41.960125Z","signature_b64":"16y55M/EDiy5tcYAUBQ1A5vcNaA5EG+sK4j1YLycbTAdpV2KhUm883Xj6fnbWitYm2x3oT1AyGdXIJPgR+wLDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c223c3813ea08225cb799c55918abbde906a6f99454bdaca92819f601d79e5e0","last_reissued_at":"2026-07-05T05:14:41.959713Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:14:41.959713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2211.04790","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":"2026-07-05T05:14:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Utulo8Fef19LNNaBcTimp0CpZ8rsxGGJlgAd+Av0XGNaLfviAfjAIL0KgP9yQK0Zu8EqmGW3l4QPiNieYlwBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T08:37:31.626367Z"},"content_sha256":"01b2d639278c42af96084b98c0e7da2e0d30e899218dbae1a0ed78264b5c2771","schema_version":"1.0","event_id":"sha256:01b2d639278c42af96084b98c0e7da2e0d30e899218dbae1a0ed78264b5c2771"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:YIR4HAJ6UCBCLS3ZTRKZDCV332","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Development and first operation of a Cavity Ring Down Spectroscopy diagnostic in the negative ion source SPIDER","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"A. Tiso, C. Taliercio, F. Rossetto, G. Serianni, M. Barbisan, M. Pilieci, R. Agnello, R.Pasqualotto, V. Cervaro","submitted_at":"2022-11-09T10:34:47Z","abstract_excerpt":"The Neutral Beam Injectors of the ITER experiment will rely on negative ion sources to produce 16.7 MW beams of H/D particles accelerated at 1 MeV. The prototype of these sources was built and is currently operated in the SPIDER experiment (Source for the Production of Ions o Deuterium Extracted from an RF plasma), part of the Neutral Beam Test Facility of Consorzio RFX, Padua. In SPIDER, the H-/D- ion source is coupled to a three grids 100 kV acceleration system. One of the main targets of the experimentation in SPIDER is to uniformly maximize the extracted current density; to achieve this it"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.04790","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/2211.04790/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":"2026-07-05T05:14:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X8ifWQUCsuXkcAVIO1cm+AwcNGpFswR7r40CD8q2rUgZqFEnahmUyFzM4+5j3fGRkn8mWFf0IFheI5kaKVGGBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T08:37:31.626755Z"},"content_sha256":"6b7736d36bc3ac4d58f5e68c25091ddedc364d7041f7a837edf8f7b53d21a968","schema_version":"1.0","event_id":"sha256:6b7736d36bc3ac4d58f5e68c25091ddedc364d7041f7a837edf8f7b53d21a968"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YIR4HAJ6UCBCLS3ZTRKZDCV332/bundle.json","state_url":"https://pith.science/pith/YIR4HAJ6UCBCLS3ZTRKZDCV332/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YIR4HAJ6UCBCLS3ZTRKZDCV332/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":"2026-07-07T08:37:31Z","links":{"resolver":"https://pith.science/pith/YIR4HAJ6UCBCLS3ZTRKZDCV332","bundle":"https://pith.science/pith/YIR4HAJ6UCBCLS3ZTRKZDCV332/bundle.json","state":"https://pith.science/pith/YIR4HAJ6UCBCLS3ZTRKZDCV332/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YIR4HAJ6UCBCLS3ZTRKZDCV332/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:YIR4HAJ6UCBCLS3ZTRKZDCV332","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":"3abbc00a3dec4088e5b6ca2f9aa19766911bcd0ca3ef5a86eba3d96a74a4bb9f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-09T10:34:47Z","title_canon_sha256":"4827ee06d9d6b40dfc0f2a8421cc3605f97a3b969312465e0b9303e80c7a6835"},"schema_version":"1.0","source":{"id":"2211.04790","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.04790","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"arxiv_version","alias_value":"2211.04790v1","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.04790","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"pith_short_12","alias_value":"YIR4HAJ6UCBC","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"pith_short_16","alias_value":"YIR4HAJ6UCBCLS3Z","created_at":"2026-07-05T05:14:41Z"},{"alias_kind":"pith_short_8","alias_value":"YIR4HAJ6","created_at":"2026-07-05T05:14:41Z"}],"graph_snapshots":[{"event_id":"sha256:6b7736d36bc3ac4d58f5e68c25091ddedc364d7041f7a837edf8f7b53d21a968","target":"graph","created_at":"2026-07-05T05:14:41Z","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/2211.04790/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Neutral Beam Injectors of the ITER experiment will rely on negative ion sources to produce 16.7 MW beams of H/D particles accelerated at 1 MeV. The prototype of these sources was built and is currently operated in the SPIDER experiment (Source for the Production of Ions o Deuterium Extracted from an RF plasma), part of the Neutral Beam Test Facility of Consorzio RFX, Padua. In SPIDER, the H-/D- ion source is coupled to a three grids 100 kV acceleration system. One of the main targets of the experimentation in SPIDER is to uniformly maximize the extracted current density; to achieve this it","authors_text":"A. Tiso, C. Taliercio, F. Rossetto, G. Serianni, M. Barbisan, M. Pilieci, R. Agnello, R.Pasqualotto, V. Cervaro","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-09T10:34:47Z","title":"Development and first operation of a Cavity Ring Down Spectroscopy diagnostic in the negative ion source SPIDER"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.04790","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":"sha256:01b2d639278c42af96084b98c0e7da2e0d30e899218dbae1a0ed78264b5c2771","target":"record","created_at":"2026-07-05T05:14:41Z","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":"3abbc00a3dec4088e5b6ca2f9aa19766911bcd0ca3ef5a86eba3d96a74a4bb9f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-11-09T10:34:47Z","title_canon_sha256":"4827ee06d9d6b40dfc0f2a8421cc3605f97a3b969312465e0b9303e80c7a6835"},"schema_version":"1.0","source":{"id":"2211.04790","kind":"arxiv","version":1}},"canonical_sha256":"c223c3813ea08225cb799c55918abbde906a6f99454bdaca92819f601d79e5e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c223c3813ea08225cb799c55918abbde906a6f99454bdaca92819f601d79e5e0","first_computed_at":"2026-07-05T05:14:41.959713Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:14:41.959713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"16y55M/EDiy5tcYAUBQ1A5vcNaA5EG+sK4j1YLycbTAdpV2KhUm883Xj6fnbWitYm2x3oT1AyGdXIJPgR+wLDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T05:14:41.960125Z","signed_message":"canonical_sha256_bytes"},"source_id":"2211.04790","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01b2d639278c42af96084b98c0e7da2e0d30e899218dbae1a0ed78264b5c2771","sha256:6b7736d36bc3ac4d58f5e68c25091ddedc364d7041f7a837edf8f7b53d21a968"],"state_sha256":"2d2f9af770944e109beb3c948c79126d3a89c1f3fbe90a140868567598429d46"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ogIVBAiVNmlUZKQu4WuTe7ZCIg0TqYq2zJIrDvsI6MguqvPSOmqUZB5tgB45dwAqHKFw8W0RJcF6VxvTIPVeCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T08:37:31.628647Z","bundle_sha256":"5963e3bb9bb3e3ad87926492175bffbf7913f709f75eed977955a5f2b7019b97"}}