{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:DCI4WXQA7KTXYVOWY5LDZKTPH4","short_pith_number":"pith:DCI4WXQA","canonical_record":{"source":{"id":"1609.05436","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-09-18T07:02:08Z","cross_cats_sorted":[],"title_canon_sha256":"dbdafcc524246f5caff44546e03fe42704c1bdf5212a3cb306e05b33dd7acdb5","abstract_canon_sha256":"8131b8a8d34510a814d7d204416dc398d2a038449ba689417adc5e8e18d7389f"},"schema_version":"1.0"},"canonical_sha256":"1891cb5e00faa77c55d6c7563caa6f3f0b292a45de5a124e96b43737b868d526","source":{"kind":"arxiv","id":"1609.05436","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.05436","created_at":"2026-05-18T01:03:48Z"},{"alias_kind":"arxiv_version","alias_value":"1609.05436v1","created_at":"2026-05-18T01:03:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.05436","created_at":"2026-05-18T01:03:48Z"},{"alias_kind":"pith_short_12","alias_value":"DCI4WXQA7KTX","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DCI4WXQA7KTXYVOW","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DCI4WXQA","created_at":"2026-05-18T12:30:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:DCI4WXQA7KTXYVOWY5LDZKTPH4","target":"record","payload":{"canonical_record":{"source":{"id":"1609.05436","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-09-18T07:02:08Z","cross_cats_sorted":[],"title_canon_sha256":"dbdafcc524246f5caff44546e03fe42704c1bdf5212a3cb306e05b33dd7acdb5","abstract_canon_sha256":"8131b8a8d34510a814d7d204416dc398d2a038449ba689417adc5e8e18d7389f"},"schema_version":"1.0"},"canonical_sha256":"1891cb5e00faa77c55d6c7563caa6f3f0b292a45de5a124e96b43737b868d526","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:03:48.250919Z","signature_b64":"b2pu3H9Lq44kGC2NjARx7qhoGTxQL+7v0phxpJ7AIwDn4DqWa59OZa47N45zkeKIYpJcW6cnIe7DC4XL2MGUAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1891cb5e00faa77c55d6c7563caa6f3f0b292a45de5a124e96b43737b868d526","last_reissued_at":"2026-05-18T01:03:48.250262Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:03:48.250262Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.05436","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":"2026-05-18T01:03:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LJ4z88wNsnDBpfBF7/sKNiSEioyFlfCKo/r1qDddBRqP4ZgqinaLwjMUFMsqp9IOS1i7Kt0KNtcu8XsTXx/3BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T14:42:06.422494Z"},"content_sha256":"139f048c015836e18a960efd33abada27b2700847196c6772cc3a1d3946a6ff4","schema_version":"1.0","event_id":"sha256:139f048c015836e18a960efd33abada27b2700847196c6772cc3a1d3946a6ff4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:DCI4WXQA7KTXYVOWY5LDZKTPH4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Regenerative Soot: A cusp field, graphite hollow cathode, carbon cluster ion source","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Shoaib Ahmad, Tasneem Riffat","submitted_at":"2016-09-18T07:02:08Z","abstract_excerpt":"An all carbon hollow cathode ion source with a specially designed cusp magnetic field Bz as a function of radius and theta is described. Velocity spectra from this source has shown that carbon cluster synthesis is taking place as a function of the source design, discharge parameters and the state of sooting. The cusp magnetic field seems to establish two distinct discharge regions within the source. The first is a narrow annular ring that is 2 mm thick and 15-20 mm long with restricted axial and radial extent of the cusp field. Here the source gas ionizes. The carbon atoms sputter of the catho"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.05436","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":""},"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":"2026-05-18T01:03:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i7wEkDDX/SkcaSALOcMyGejxU7PvDUjkDRUzyjYrvvIvv72m3xkR2wPMpNoWgHjZl1CV5lSNXbO9ajucqWlSBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T14:42:06.422878Z"},"content_sha256":"61d0eac07682dd25a39e2f7544511aee76ada26036a4ec8a056164418cad5f9e","schema_version":"1.0","event_id":"sha256:61d0eac07682dd25a39e2f7544511aee76ada26036a4ec8a056164418cad5f9e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DCI4WXQA7KTXYVOWY5LDZKTPH4/bundle.json","state_url":"https://pith.science/pith/DCI4WXQA7KTXYVOWY5LDZKTPH4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DCI4WXQA7KTXYVOWY5LDZKTPH4/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":"2026-06-01T14:42:06Z","links":{"resolver":"https://pith.science/pith/DCI4WXQA7KTXYVOWY5LDZKTPH4","bundle":"https://pith.science/pith/DCI4WXQA7KTXYVOWY5LDZKTPH4/bundle.json","state":"https://pith.science/pith/DCI4WXQA7KTXYVOWY5LDZKTPH4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DCI4WXQA7KTXYVOWY5LDZKTPH4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:DCI4WXQA7KTXYVOWY5LDZKTPH4","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":"8131b8a8d34510a814d7d204416dc398d2a038449ba689417adc5e8e18d7389f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-09-18T07:02:08Z","title_canon_sha256":"dbdafcc524246f5caff44546e03fe42704c1bdf5212a3cb306e05b33dd7acdb5"},"schema_version":"1.0","source":{"id":"1609.05436","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.05436","created_at":"2026-05-18T01:03:48Z"},{"alias_kind":"arxiv_version","alias_value":"1609.05436v1","created_at":"2026-05-18T01:03:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.05436","created_at":"2026-05-18T01:03:48Z"},{"alias_kind":"pith_short_12","alias_value":"DCI4WXQA7KTX","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DCI4WXQA7KTXYVOW","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DCI4WXQA","created_at":"2026-05-18T12:30:12Z"}],"graph_snapshots":[{"event_id":"sha256:61d0eac07682dd25a39e2f7544511aee76ada26036a4ec8a056164418cad5f9e","target":"graph","created_at":"2026-05-18T01:03:48Z","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"},"paper":{"abstract_excerpt":"An all carbon hollow cathode ion source with a specially designed cusp magnetic field Bz as a function of radius and theta is described. Velocity spectra from this source has shown that carbon cluster synthesis is taking place as a function of the source design, discharge parameters and the state of sooting. The cusp magnetic field seems to establish two distinct discharge regions within the source. The first is a narrow annular ring that is 2 mm thick and 15-20 mm long with restricted axial and radial extent of the cusp field. Here the source gas ionizes. The carbon atoms sputter of the catho","authors_text":"Shoaib Ahmad, Tasneem Riffat","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-09-18T07:02:08Z","title":"Regenerative Soot: A cusp field, graphite hollow cathode, carbon cluster ion source"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.05436","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":"sha256:139f048c015836e18a960efd33abada27b2700847196c6772cc3a1d3946a6ff4","target":"record","created_at":"2026-05-18T01:03:48Z","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":"8131b8a8d34510a814d7d204416dc398d2a038449ba689417adc5e8e18d7389f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-09-18T07:02:08Z","title_canon_sha256":"dbdafcc524246f5caff44546e03fe42704c1bdf5212a3cb306e05b33dd7acdb5"},"schema_version":"1.0","source":{"id":"1609.05436","kind":"arxiv","version":1}},"canonical_sha256":"1891cb5e00faa77c55d6c7563caa6f3f0b292a45de5a124e96b43737b868d526","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1891cb5e00faa77c55d6c7563caa6f3f0b292a45de5a124e96b43737b868d526","first_computed_at":"2026-05-18T01:03:48.250262Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:03:48.250262Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b2pu3H9Lq44kGC2NjARx7qhoGTxQL+7v0phxpJ7AIwDn4DqWa59OZa47N45zkeKIYpJcW6cnIe7DC4XL2MGUAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:03:48.250919Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.05436","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:139f048c015836e18a960efd33abada27b2700847196c6772cc3a1d3946a6ff4","sha256:61d0eac07682dd25a39e2f7544511aee76ada26036a4ec8a056164418cad5f9e"],"state_sha256":"10b92a8fb812f7709bb8cc454c780cf92fd1f3c73802cb8ead3c417647f761db"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JpvadyUN7QQneu/+SzPJnDKpwcO36MULOrlSjgGh8+4minFGT/jdeqINpVoMLaGV7zSJSpaP5DDP7FnDTxCSDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T14:42:06.424873Z","bundle_sha256":"6326e5f7015b9e09c2bae847ded2420c105570a1f0ec90cb8e1fadc86446854d"}}