{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:2DFZ6T6DE7E5BRMBDQVWTVUH6Z","short_pith_number":"pith:2DFZ6T6D","canonical_record":{"source":{"id":"1408.7108","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2014-08-29T19:18:00Z","cross_cats_sorted":[],"title_canon_sha256":"81c9f28d1464b491114e4a7f1299beff3806c956eeb1137456d451dd02fbc577","abstract_canon_sha256":"f22e6cb7cc720ddceaca43bdd772485b69cd8546d0ba70d87702e4d1da5dd7b5"},"schema_version":"1.0"},"canonical_sha256":"d0cb9f4fc327c9d0c5811c2b69d687f649c7aa0654f18c7535ff0cb3f13fe458","source":{"kind":"arxiv","id":"1408.7108","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.7108","created_at":"2026-05-18T02:43:59Z"},{"alias_kind":"arxiv_version","alias_value":"1408.7108v1","created_at":"2026-05-18T02:43:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.7108","created_at":"2026-05-18T02:43:59Z"},{"alias_kind":"pith_short_12","alias_value":"2DFZ6T6DE7E5","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"2DFZ6T6DE7E5BRMB","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"2DFZ6T6D","created_at":"2026-05-18T12:28:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:2DFZ6T6DE7E5BRMBDQVWTVUH6Z","target":"record","payload":{"canonical_record":{"source":{"id":"1408.7108","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2014-08-29T19:18:00Z","cross_cats_sorted":[],"title_canon_sha256":"81c9f28d1464b491114e4a7f1299beff3806c956eeb1137456d451dd02fbc577","abstract_canon_sha256":"f22e6cb7cc720ddceaca43bdd772485b69cd8546d0ba70d87702e4d1da5dd7b5"},"schema_version":"1.0"},"canonical_sha256":"d0cb9f4fc327c9d0c5811c2b69d687f649c7aa0654f18c7535ff0cb3f13fe458","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:43:59.637660Z","signature_b64":"geKEaQ1yT2N0vJG18irx6D9404G/Pv8M0mWAFm4um+4fa5zEiIh9KTaURqvRwrqNiCMik36wbvb72UvW4lB1Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d0cb9f4fc327c9d0c5811c2b69d687f649c7aa0654f18c7535ff0cb3f13fe458","last_reissued_at":"2026-05-18T02:43:59.637208Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:43:59.637208Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1408.7108","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":"2026-05-18T02:43:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gBubkBuE8G/Av++6GojmB0HvXaUSUfH0VnVGelm2eNE6qdbK91Tmj9CctS5EdH6VTy1//FrwvF1OXakMxvuDBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:44:30.438198Z"},"content_sha256":"89d5daa3d0283fe1273c2ca8b0a6a1d963216ef94d80ac8fb8ff338d781255b7","schema_version":"1.0","event_id":"sha256:89d5daa3d0283fe1273c2ca8b0a6a1d963216ef94d80ac8fb8ff338d781255b7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:2DFZ6T6DE7E5BRMBDQVWTVUH6Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Instrumentation Developments and Beam Studies for the Fermilab Proton Improvement Plan LINAC Upgrade and New RFQ Front-End","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"Alexei Semenov, Cheng-Yang Tan, Daniel S. Bollinger, Kevin L. Duel, Nathan Eddy, Ning Lui, Pat R. Karns, Raymond E. Tomlin, Victor E. Scarpine, William A. Pellico (Fermilab)","submitted_at":"2014-08-29T19:18:00Z","abstract_excerpt":"Fermilab is developing a Proton Improvement Plan (PIP) to increase throughput of its proton source. The plan addresses hardware modifications to increase repetition rate and improve beam loss while ensuring viable operation of the proton source through 2025. The first phase of the PIP will enable the Fermilab proton source to deliver 1.8e17 protons per hour by mid-2013. As part of this initial upgrade, Fermilab plans to install a new front-end consisting of dual H- ion sources and a 201 MHz pulsed RFQ. This paper will present beam studies measurements of this new front-end and discuss new beam"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.7108","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":"2026-05-18T02:43:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dbAV6AZYPjkEAxtew5xs5UfNQjfxiPa9oBguBSRyZH7cwlIPIkmQe6P5UBaHCf4iRwI16EWfGqzqqOu+sPA5Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:44:30.439021Z"},"content_sha256":"5532ef03c6f7015843ab1bb0baebeb863fb30cd2599f03c043388281b7085040","schema_version":"1.0","event_id":"sha256:5532ef03c6f7015843ab1bb0baebeb863fb30cd2599f03c043388281b7085040"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2DFZ6T6DE7E5BRMBDQVWTVUH6Z/bundle.json","state_url":"https://pith.science/pith/2DFZ6T6DE7E5BRMBDQVWTVUH6Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2DFZ6T6DE7E5BRMBDQVWTVUH6Z/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":"2026-05-31T07:44:30Z","links":{"resolver":"https://pith.science/pith/2DFZ6T6DE7E5BRMBDQVWTVUH6Z","bundle":"https://pith.science/pith/2DFZ6T6DE7E5BRMBDQVWTVUH6Z/bundle.json","state":"https://pith.science/pith/2DFZ6T6DE7E5BRMBDQVWTVUH6Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2DFZ6T6DE7E5BRMBDQVWTVUH6Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:2DFZ6T6DE7E5BRMBDQVWTVUH6Z","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":"f22e6cb7cc720ddceaca43bdd772485b69cd8546d0ba70d87702e4d1da5dd7b5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2014-08-29T19:18:00Z","title_canon_sha256":"81c9f28d1464b491114e4a7f1299beff3806c956eeb1137456d451dd02fbc577"},"schema_version":"1.0","source":{"id":"1408.7108","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.7108","created_at":"2026-05-18T02:43:59Z"},{"alias_kind":"arxiv_version","alias_value":"1408.7108v1","created_at":"2026-05-18T02:43:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.7108","created_at":"2026-05-18T02:43:59Z"},{"alias_kind":"pith_short_12","alias_value":"2DFZ6T6DE7E5","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"2DFZ6T6DE7E5BRMB","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"2DFZ6T6D","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:5532ef03c6f7015843ab1bb0baebeb863fb30cd2599f03c043388281b7085040","target":"graph","created_at":"2026-05-18T02:43:59Z","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":"Fermilab is developing a Proton Improvement Plan (PIP) to increase throughput of its proton source. The plan addresses hardware modifications to increase repetition rate and improve beam loss while ensuring viable operation of the proton source through 2025. The first phase of the PIP will enable the Fermilab proton source to deliver 1.8e17 protons per hour by mid-2013. As part of this initial upgrade, Fermilab plans to install a new front-end consisting of dual H- ion sources and a 201 MHz pulsed RFQ. This paper will present beam studies measurements of this new front-end and discuss new beam","authors_text":"Alexei Semenov, Cheng-Yang Tan, Daniel S. Bollinger, Kevin L. Duel, Nathan Eddy, Ning Lui, Pat R. Karns, Raymond E. Tomlin, Victor E. Scarpine, William A. Pellico (Fermilab)","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2014-08-29T19:18:00Z","title":"Instrumentation Developments and Beam Studies for the Fermilab Proton Improvement Plan LINAC Upgrade and New RFQ Front-End"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.7108","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":"sha256:89d5daa3d0283fe1273c2ca8b0a6a1d963216ef94d80ac8fb8ff338d781255b7","target":"record","created_at":"2026-05-18T02:43:59Z","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":"f22e6cb7cc720ddceaca43bdd772485b69cd8546d0ba70d87702e4d1da5dd7b5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2014-08-29T19:18:00Z","title_canon_sha256":"81c9f28d1464b491114e4a7f1299beff3806c956eeb1137456d451dd02fbc577"},"schema_version":"1.0","source":{"id":"1408.7108","kind":"arxiv","version":1}},"canonical_sha256":"d0cb9f4fc327c9d0c5811c2b69d687f649c7aa0654f18c7535ff0cb3f13fe458","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d0cb9f4fc327c9d0c5811c2b69d687f649c7aa0654f18c7535ff0cb3f13fe458","first_computed_at":"2026-05-18T02:43:59.637208Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:43:59.637208Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"geKEaQ1yT2N0vJG18irx6D9404G/Pv8M0mWAFm4um+4fa5zEiIh9KTaURqvRwrqNiCMik36wbvb72UvW4lB1Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:43:59.637660Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.7108","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:89d5daa3d0283fe1273c2ca8b0a6a1d963216ef94d80ac8fb8ff338d781255b7","sha256:5532ef03c6f7015843ab1bb0baebeb863fb30cd2599f03c043388281b7085040"],"state_sha256":"01cd3fa81a93e03eb96d3705b7516ab2f1f732dca570eaa77c7d5632a1dd5d38"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cwQ61S0e11IaypsAuxFz8Q7Ztiww1o6+WkIKx5lppPFFH6xnShLOFf+s4346umdcxsHUiLCnRqp8EYSimz9kDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T07:44:30.443171Z","bundle_sha256":"d00b0ad770e7c8a55adc146bd81739212ba074d0a1aa749b8c812f3ae5b5ca53"}}