{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:32XSB2BPZZJFO4VMPLH7RDQ56C","short_pith_number":"pith:32XSB2BP","canonical_record":{"source":{"id":"physics/0008071","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"physics.acc-ph","submitted_at":"2000-08-15T17:03:26Z","cross_cats_sorted":[],"title_canon_sha256":"f0ea0bd6ce7a8957f2fcb8370b313afb16918e5e42247a226fdbf1415918af59","abstract_canon_sha256":"f7be4b883d78803be23b144281fe132ea3ae8477d8a04a0a1b1c7530561858bc"},"schema_version":"1.0"},"canonical_sha256":"deaf20e82fce525772ac7acff88e1df0947c9433f1cdd3ce9cae95061cd775d5","source":{"kind":"arxiv","id":"physics/0008071","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0008071","created_at":"2026-05-18T03:47:09Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0008071v2","created_at":"2026-05-18T03:47:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0008071","created_at":"2026-05-18T03:47:09Z"},{"alias_kind":"pith_short_12","alias_value":"32XSB2BPZZJF","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"32XSB2BPZZJFO4VM","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"32XSB2BP","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:32XSB2BPZZJFO4VMPLH7RDQ56C","target":"record","payload":{"canonical_record":{"source":{"id":"physics/0008071","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"physics.acc-ph","submitted_at":"2000-08-15T17:03:26Z","cross_cats_sorted":[],"title_canon_sha256":"f0ea0bd6ce7a8957f2fcb8370b313afb16918e5e42247a226fdbf1415918af59","abstract_canon_sha256":"f7be4b883d78803be23b144281fe132ea3ae8477d8a04a0a1b1c7530561858bc"},"schema_version":"1.0"},"canonical_sha256":"deaf20e82fce525772ac7acff88e1df0947c9433f1cdd3ce9cae95061cd775d5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:09.598076Z","signature_b64":"Hot+Ez/B/ZWXpMcAy/omn/uoJGmb11YcCQ2goAv//sit9tqayFCJm+Dm7oyVyj3RQGvacG/XF04Z8rde7iGqBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"deaf20e82fce525772ac7acff88e1df0947c9433f1cdd3ce9cae95061cd775d5","last_reissued_at":"2026-05-18T03:47:09.597571Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:09.597571Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"physics/0008071","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":"2026-05-18T03:47:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oKRMFGoxZH6ku6/uWFyHybTy0NGn6u5zVdFD2iKn2wezzDRzZZTuZH8MmoO2XCjlmqM4wJZyhvOI8L87lVbnCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T05:48:14.260886Z"},"content_sha256":"b6c67154e168c28babb6971b0917011ad9d6ede9a327bc71958bc7923346472d","schema_version":"1.0","event_id":"sha256:b6c67154e168c28babb6971b0917011ad9d6ede9a327bc71958bc7923346472d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:32XSB2BPZZJFO4VMPLH7RDQ56C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Beam Emittance Measurements for the Low-Energy Demonstration Accelerator Radio-Frequency Quadrupole","license":"","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"H. V. Smith, J. D. Gilpatrick, J. D. Schneider, Jr., L. J. Rybarcyk, L. M. You, M. E. Schulze, W. P. Lysenko","submitted_at":"2000-08-15T17:03:26Z","abstract_excerpt":"The Low-Energy Demonstration Accelerator (LEDA) radio-frequency quadrupole (RFQ) is a 100% duty factor (CW) linac that delivers >100 mA of H+ beam at 6.7 MeV. The 8-m-long, 350-MHz RFQ structure accelerates a dc, 75-keV, 110-mA H+ beam from the LEDA injector with >90% transmission. LEDA [1,2] consists of a 75-keV proton injector, 6.7-MeV, 350-MHz CW RFQ with associated high-power and low-level rf systems, a short high-energy beam transport (HEBT) and high-power (670-kW CW) beam stop. The beam emittance is inferred from wire scanner measurements of the beam profile at a single location in the H"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0008071","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":""},"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":"2026-05-18T03:47:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yFZOmGhLc/cSoFvrXr7fQWSK5wbVYwizkH/70BCYZcKI1DWhosHub0xdX/AJHMeZ3zJYpI4v1LImTBubWAKXBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T05:48:14.261439Z"},"content_sha256":"24e0e054bb4495c442438c28eb627f2b3973bba0049f23bf6eb2ad4935a26fa7","schema_version":"1.0","event_id":"sha256:24e0e054bb4495c442438c28eb627f2b3973bba0049f23bf6eb2ad4935a26fa7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/32XSB2BPZZJFO4VMPLH7RDQ56C/bundle.json","state_url":"https://pith.science/pith/32XSB2BPZZJFO4VMPLH7RDQ56C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/32XSB2BPZZJFO4VMPLH7RDQ56C/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":"2026-06-05T05:48:14Z","links":{"resolver":"https://pith.science/pith/32XSB2BPZZJFO4VMPLH7RDQ56C","bundle":"https://pith.science/pith/32XSB2BPZZJFO4VMPLH7RDQ56C/bundle.json","state":"https://pith.science/pith/32XSB2BPZZJFO4VMPLH7RDQ56C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/32XSB2BPZZJFO4VMPLH7RDQ56C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:32XSB2BPZZJFO4VMPLH7RDQ56C","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":"f7be4b883d78803be23b144281fe132ea3ae8477d8a04a0a1b1c7530561858bc","cross_cats_sorted":[],"license":"","primary_cat":"physics.acc-ph","submitted_at":"2000-08-15T17:03:26Z","title_canon_sha256":"f0ea0bd6ce7a8957f2fcb8370b313afb16918e5e42247a226fdbf1415918af59"},"schema_version":"1.0","source":{"id":"physics/0008071","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0008071","created_at":"2026-05-18T03:47:09Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0008071v2","created_at":"2026-05-18T03:47:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0008071","created_at":"2026-05-18T03:47:09Z"},{"alias_kind":"pith_short_12","alias_value":"32XSB2BPZZJF","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"32XSB2BPZZJFO4VM","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"32XSB2BP","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:24e0e054bb4495c442438c28eb627f2b3973bba0049f23bf6eb2ad4935a26fa7","target":"graph","created_at":"2026-05-18T03:47:09Z","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":"The Low-Energy Demonstration Accelerator (LEDA) radio-frequency quadrupole (RFQ) is a 100% duty factor (CW) linac that delivers >100 mA of H+ beam at 6.7 MeV. The 8-m-long, 350-MHz RFQ structure accelerates a dc, 75-keV, 110-mA H+ beam from the LEDA injector with >90% transmission. LEDA [1,2] consists of a 75-keV proton injector, 6.7-MeV, 350-MHz CW RFQ with associated high-power and low-level rf systems, a short high-energy beam transport (HEBT) and high-power (670-kW CW) beam stop. The beam emittance is inferred from wire scanner measurements of the beam profile at a single location in the H","authors_text":"H. V. Smith, J. D. Gilpatrick, J. D. Schneider, Jr., L. J. Rybarcyk, L. M. You, M. E. Schulze, W. P. Lysenko","cross_cats":[],"headline":"","license":"","primary_cat":"physics.acc-ph","submitted_at":"2000-08-15T17:03:26Z","title":"Beam Emittance Measurements for the Low-Energy Demonstration Accelerator Radio-Frequency Quadrupole"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0008071","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:b6c67154e168c28babb6971b0917011ad9d6ede9a327bc71958bc7923346472d","target":"record","created_at":"2026-05-18T03:47:09Z","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":"f7be4b883d78803be23b144281fe132ea3ae8477d8a04a0a1b1c7530561858bc","cross_cats_sorted":[],"license":"","primary_cat":"physics.acc-ph","submitted_at":"2000-08-15T17:03:26Z","title_canon_sha256":"f0ea0bd6ce7a8957f2fcb8370b313afb16918e5e42247a226fdbf1415918af59"},"schema_version":"1.0","source":{"id":"physics/0008071","kind":"arxiv","version":2}},"canonical_sha256":"deaf20e82fce525772ac7acff88e1df0947c9433f1cdd3ce9cae95061cd775d5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"deaf20e82fce525772ac7acff88e1df0947c9433f1cdd3ce9cae95061cd775d5","first_computed_at":"2026-05-18T03:47:09.597571Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:09.597571Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hot+Ez/B/ZWXpMcAy/omn/uoJGmb11YcCQ2goAv//sit9tqayFCJm+Dm7oyVyj3RQGvacG/XF04Z8rde7iGqBg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:09.598076Z","signed_message":"canonical_sha256_bytes"},"source_id":"physics/0008071","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b6c67154e168c28babb6971b0917011ad9d6ede9a327bc71958bc7923346472d","sha256:24e0e054bb4495c442438c28eb627f2b3973bba0049f23bf6eb2ad4935a26fa7"],"state_sha256":"1d6cab1b75d877273e088bf7f7b8ff6f9ea842c66f7e4d5d05ad279ccb5bd5a4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M4yyQgwrf8Gxjx7/ZM6MapQY5iX3qksZq/VdhidVYG4rwwoSr+2WmYZJXyRPNZ+0lreVZpyJ072YGtdQAz4jDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T05:48:14.264352Z","bundle_sha256":"191e57ad4f7b62e03413777248b1f84e7e308f7295b753ba3166cb77a6dca98f"}}