{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:CRIISJJ7QEEV2YZ5PZ4V2OFNYA","short_pith_number":"pith:CRIISJJ7","canonical_record":{"source":{"id":"1808.06925","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-08-17T21:28:30Z","cross_cats_sorted":[],"title_canon_sha256":"54d74680350b08c90f71f508f69cbc2cb425b2bcefc2df72b25bf7cc2007b442","abstract_canon_sha256":"4c6fc1bd2130f379be0a7fd8d670f64d047f4d662fd1d0450a74500a2fff05d1"},"schema_version":"1.0"},"canonical_sha256":"145089253f81095d633d7e795d38adc02c0325b2ba0b0d0584929489dc31e6d7","source":{"kind":"arxiv","id":"1808.06925","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06925","created_at":"2026-05-17T23:55:20Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06925v1","created_at":"2026-05-17T23:55:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06925","created_at":"2026-05-17T23:55:20Z"},{"alias_kind":"pith_short_12","alias_value":"CRIISJJ7QEEV","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"CRIISJJ7QEEV2YZ5","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"CRIISJJ7","created_at":"2026-05-18T12:32:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:CRIISJJ7QEEV2YZ5PZ4V2OFNYA","target":"record","payload":{"canonical_record":{"source":{"id":"1808.06925","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-08-17T21:28:30Z","cross_cats_sorted":[],"title_canon_sha256":"54d74680350b08c90f71f508f69cbc2cb425b2bcefc2df72b25bf7cc2007b442","abstract_canon_sha256":"4c6fc1bd2130f379be0a7fd8d670f64d047f4d662fd1d0450a74500a2fff05d1"},"schema_version":"1.0"},"canonical_sha256":"145089253f81095d633d7e795d38adc02c0325b2ba0b0d0584929489dc31e6d7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:20.021697Z","signature_b64":"PDZHJ1Dtzot1eAO77AJ3hJKRP7rutRyB5cK4bWId6yuC0SA0I0WI3qA23humzdgukvo0dz90XIavRAaFPOzzAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"145089253f81095d633d7e795d38adc02c0325b2ba0b0d0584929489dc31e6d7","last_reissued_at":"2026-05-17T23:55:20.021165Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:20.021165Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.06925","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":"2026-05-17T23:55:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X9aG92VI5/HKNxoJxNqS86ijq4Me8TjAzwz9sZWZ7BOKUfIiE3193/cdAyiAH7Zhj8hZAG+Ht2Agr/Hfyoo3BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:20:53.344262Z"},"content_sha256":"cd57aecda12684c26ad580aa67ab881d3d356f47c93dae08aafcd308994f3bbe","schema_version":"1.0","event_id":"sha256:cd57aecda12684c26ad580aa67ab881d3d356f47c93dae08aafcd308994f3bbe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:CRIISJJ7QEEV2YZ5PZ4V2OFNYA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Negative ion radio frequency surface plasma source with solenoidal magnetic field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"B. Han, C. Piller, C. Stinson, G. Dudnikova, M. Stockli, R.P. Johnson, R. Welton, S. Murray, T. Pennisi, V. Dudnikov, Y. Kang","submitted_at":"2018-08-17T21:28:30Z","abstract_excerpt":"Pulsed and CW operation of negative ion radio frequency surface plasma source with a solenoidal magnetic field is described. Dependences of a beam current on RF power, extraction voltage, solenoid magnetic field, gas flow are presented. Compact design of RF SPS is presented."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06925","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":"2026-05-17T23:55:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CrP8IDsI5qwfx1/S1j9D62p2AR8fWqmKCWcFsXxiUz2PE/T8Qfdsp+2h8CUQhCj8qzLAvQJt5RO9vjmbX21wAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:20:53.344623Z"},"content_sha256":"8ee8f92effbdc552a51cc4e14bc6387c34680eeb0eadbdfb1b04e79dc6c5f0bf","schema_version":"1.0","event_id":"sha256:8ee8f92effbdc552a51cc4e14bc6387c34680eeb0eadbdfb1b04e79dc6c5f0bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CRIISJJ7QEEV2YZ5PZ4V2OFNYA/bundle.json","state_url":"https://pith.science/pith/CRIISJJ7QEEV2YZ5PZ4V2OFNYA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CRIISJJ7QEEV2YZ5PZ4V2OFNYA/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":"2026-06-04T19:20:53Z","links":{"resolver":"https://pith.science/pith/CRIISJJ7QEEV2YZ5PZ4V2OFNYA","bundle":"https://pith.science/pith/CRIISJJ7QEEV2YZ5PZ4V2OFNYA/bundle.json","state":"https://pith.science/pith/CRIISJJ7QEEV2YZ5PZ4V2OFNYA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CRIISJJ7QEEV2YZ5PZ4V2OFNYA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CRIISJJ7QEEV2YZ5PZ4V2OFNYA","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":"4c6fc1bd2130f379be0a7fd8d670f64d047f4d662fd1d0450a74500a2fff05d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-08-17T21:28:30Z","title_canon_sha256":"54d74680350b08c90f71f508f69cbc2cb425b2bcefc2df72b25bf7cc2007b442"},"schema_version":"1.0","source":{"id":"1808.06925","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06925","created_at":"2026-05-17T23:55:20Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06925v1","created_at":"2026-05-17T23:55:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06925","created_at":"2026-05-17T23:55:20Z"},{"alias_kind":"pith_short_12","alias_value":"CRIISJJ7QEEV","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"CRIISJJ7QEEV2YZ5","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"CRIISJJ7","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:8ee8f92effbdc552a51cc4e14bc6387c34680eeb0eadbdfb1b04e79dc6c5f0bf","target":"graph","created_at":"2026-05-17T23:55:20Z","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":"Pulsed and CW operation of negative ion radio frequency surface plasma source with a solenoidal magnetic field is described. Dependences of a beam current on RF power, extraction voltage, solenoid magnetic field, gas flow are presented. Compact design of RF SPS is presented.","authors_text":"B. Han, C. Piller, C. Stinson, G. Dudnikova, M. Stockli, R.P. Johnson, R. Welton, S. Murray, T. Pennisi, V. Dudnikov, Y. Kang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-08-17T21:28:30Z","title":"Negative ion radio frequency surface plasma source with solenoidal magnetic field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06925","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:cd57aecda12684c26ad580aa67ab881d3d356f47c93dae08aafcd308994f3bbe","target":"record","created_at":"2026-05-17T23:55:20Z","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":"4c6fc1bd2130f379be0a7fd8d670f64d047f4d662fd1d0450a74500a2fff05d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-08-17T21:28:30Z","title_canon_sha256":"54d74680350b08c90f71f508f69cbc2cb425b2bcefc2df72b25bf7cc2007b442"},"schema_version":"1.0","source":{"id":"1808.06925","kind":"arxiv","version":1}},"canonical_sha256":"145089253f81095d633d7e795d38adc02c0325b2ba0b0d0584929489dc31e6d7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"145089253f81095d633d7e795d38adc02c0325b2ba0b0d0584929489dc31e6d7","first_computed_at":"2026-05-17T23:55:20.021165Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:20.021165Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PDZHJ1Dtzot1eAO77AJ3hJKRP7rutRyB5cK4bWId6yuC0SA0I0WI3qA23humzdgukvo0dz90XIavRAaFPOzzAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:20.021697Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.06925","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cd57aecda12684c26ad580aa67ab881d3d356f47c93dae08aafcd308994f3bbe","sha256:8ee8f92effbdc552a51cc4e14bc6387c34680eeb0eadbdfb1b04e79dc6c5f0bf"],"state_sha256":"9d5fe76f6504457f74bb40b70eba8bffbb7cbf20b829cff048c4c82f16e21c7b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EhNQpQh85qHnM96HMb0qcaSs2zqqQLr8SmlfpwcWQ7eaAK8qA9XPwOAE6KnXV2InIl9/WIbD56nRDQ5zewmMDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T19:20:53.346539Z","bundle_sha256":"41c8d9e69c6f5f04c76178ad12ec10f192881f8e41a5559235e6b57fb2f05d0f"}}