{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:IXQ6QI3WFQQWPNAPA56JG5LY5P","short_pith_number":"pith:IXQ6QI3W","canonical_record":{"source":{"id":"1502.01703","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-02-05T20:16:30Z","cross_cats_sorted":[],"title_canon_sha256":"9ef868f4aabe3a90283d1f4659151e15b00a60b8481ad0c6acea118372c673a2","abstract_canon_sha256":"6ad4cd05a94574275409a8b4a74c984eb9009f2712ca8dfb8846ae124b7ecc04"},"schema_version":"1.0"},"canonical_sha256":"45e1e823762c2167b40f077c937578ebdfd41b2fc69c1e85e6168daa5864a634","source":{"kind":"arxiv","id":"1502.01703","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.01703","created_at":"2026-05-18T02:27:51Z"},{"alias_kind":"arxiv_version","alias_value":"1502.01703v1","created_at":"2026-05-18T02:27:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.01703","created_at":"2026-05-18T02:27:51Z"},{"alias_kind":"pith_short_12","alias_value":"IXQ6QI3WFQQW","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"IXQ6QI3WFQQWPNAP","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"IXQ6QI3W","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:IXQ6QI3WFQQWPNAPA56JG5LY5P","target":"record","payload":{"canonical_record":{"source":{"id":"1502.01703","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-02-05T20:16:30Z","cross_cats_sorted":[],"title_canon_sha256":"9ef868f4aabe3a90283d1f4659151e15b00a60b8481ad0c6acea118372c673a2","abstract_canon_sha256":"6ad4cd05a94574275409a8b4a74c984eb9009f2712ca8dfb8846ae124b7ecc04"},"schema_version":"1.0"},"canonical_sha256":"45e1e823762c2167b40f077c937578ebdfd41b2fc69c1e85e6168daa5864a634","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:27:51.493452Z","signature_b64":"wt9pi6d7DozYneiNICK7ZH3BRT91bk7CkgPFBdS5vgqYFl0zBsgWdKGDjnMYhDIBA9iAtWTIW9U7WYoBtYuTDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"45e1e823762c2167b40f077c937578ebdfd41b2fc69c1e85e6168daa5864a634","last_reissued_at":"2026-05-18T02:27:51.492838Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:27:51.492838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.01703","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":"2026-05-18T02:27:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xKZRlF2jiGGhIT+tezh2674Qfm4wcXGjlImEQFYlDhvcfcG2M3EMSr+0ofIorqB4iuhMweaBYs1C+QQrLN9oCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T21:55:55.823114Z"},"content_sha256":"be137d6897dc375d8fbda95ab2e2f608449e2ded3dddc99042a5f06a1e051a07","schema_version":"1.0","event_id":"sha256:be137d6897dc375d8fbda95ab2e2f608449e2ded3dddc99042a5f06a1e051a07"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:IXQ6QI3WFQQWPNAPA56JG5LY5P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Status of the warm front end of PXIE","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"A. Chen, A. Shemyakin, Berkeley) R. D'Arcy (U. Coll. London, B. Hanna, C. Baffes, D. Sun (Fermilab) D. Li (LBNL, Fermilab), G. Saewert, J. Steimel, L. Prost, M. Alvarez, R. Andrews, V. Scarpine","submitted_at":"2015-02-05T20:16:30Z","abstract_excerpt":"A CW-compatible, pulsed H- superconducting linac is envisaged as a possible path for upgrading Fermilab's injection complex. To validate the concept of the front- end of such a machine, a test accelerator (a.k.a. PXIE) is under construction. The warm part of this accelerator comprises a 10 mA DC, 30 keV H- ion source, a 2m-long LEBT, a 2.1 MeV CW RFQ, and a 10-m long MEBT that is capable of creating a large variety of bunch structures. The paper will report commissioning results of a partially assembled LEBT, status of RFQ manufacturing, and describe development of the MEBT, in particular, of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.01703","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":"2026-05-18T02:27:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"drKdRQAWnnHv2PL7IvnM3EZIH8+Uu9SJ4ws0lI5M98XemgPwfhmD+rWwswILsOf5jr3XAmlwOjeupb81AvFuBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T21:55:55.823604Z"},"content_sha256":"42f37e6866dd4973f64a2984125b92b0900c2dba48f3207b37780936b6e1cb8e","schema_version":"1.0","event_id":"sha256:42f37e6866dd4973f64a2984125b92b0900c2dba48f3207b37780936b6e1cb8e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IXQ6QI3WFQQWPNAPA56JG5LY5P/bundle.json","state_url":"https://pith.science/pith/IXQ6QI3WFQQWPNAPA56JG5LY5P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IXQ6QI3WFQQWPNAPA56JG5LY5P/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":"2026-08-18T21:55:55Z","links":{"resolver":"https://pith.science/pith/IXQ6QI3WFQQWPNAPA56JG5LY5P","bundle":"https://pith.science/pith/IXQ6QI3WFQQWPNAPA56JG5LY5P/bundle.json","state":"https://pith.science/pith/IXQ6QI3WFQQWPNAPA56JG5LY5P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IXQ6QI3WFQQWPNAPA56JG5LY5P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IXQ6QI3WFQQWPNAPA56JG5LY5P","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":"6ad4cd05a94574275409a8b4a74c984eb9009f2712ca8dfb8846ae124b7ecc04","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-02-05T20:16:30Z","title_canon_sha256":"9ef868f4aabe3a90283d1f4659151e15b00a60b8481ad0c6acea118372c673a2"},"schema_version":"1.0","source":{"id":"1502.01703","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.01703","created_at":"2026-05-18T02:27:51Z"},{"alias_kind":"arxiv_version","alias_value":"1502.01703v1","created_at":"2026-05-18T02:27:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.01703","created_at":"2026-05-18T02:27:51Z"},{"alias_kind":"pith_short_12","alias_value":"IXQ6QI3WFQQW","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"IXQ6QI3WFQQWPNAP","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"IXQ6QI3W","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:42f37e6866dd4973f64a2984125b92b0900c2dba48f3207b37780936b6e1cb8e","target":"graph","created_at":"2026-05-18T02:27:51Z","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":"A CW-compatible, pulsed H- superconducting linac is envisaged as a possible path for upgrading Fermilab's injection complex. To validate the concept of the front- end of such a machine, a test accelerator (a.k.a. PXIE) is under construction. The warm part of this accelerator comprises a 10 mA DC, 30 keV H- ion source, a 2m-long LEBT, a 2.1 MeV CW RFQ, and a 10-m long MEBT that is capable of creating a large variety of bunch structures. The paper will report commissioning results of a partially assembled LEBT, status of RFQ manufacturing, and describe development of the MEBT, in particular, of ","authors_text":"A. Chen, A. Shemyakin, Berkeley) R. D'Arcy (U. Coll. London, B. Hanna, C. Baffes, D. Sun (Fermilab) D. Li (LBNL, Fermilab), G. Saewert, J. Steimel, L. Prost, M. Alvarez, R. Andrews, V. Scarpine","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-02-05T20:16:30Z","title":"Status of the warm front end of PXIE"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.01703","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:be137d6897dc375d8fbda95ab2e2f608449e2ded3dddc99042a5f06a1e051a07","target":"record","created_at":"2026-05-18T02:27:51Z","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":"6ad4cd05a94574275409a8b4a74c984eb9009f2712ca8dfb8846ae124b7ecc04","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-02-05T20:16:30Z","title_canon_sha256":"9ef868f4aabe3a90283d1f4659151e15b00a60b8481ad0c6acea118372c673a2"},"schema_version":"1.0","source":{"id":"1502.01703","kind":"arxiv","version":1}},"canonical_sha256":"45e1e823762c2167b40f077c937578ebdfd41b2fc69c1e85e6168daa5864a634","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"45e1e823762c2167b40f077c937578ebdfd41b2fc69c1e85e6168daa5864a634","first_computed_at":"2026-05-18T02:27:51.492838Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:27:51.492838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wt9pi6d7DozYneiNICK7ZH3BRT91bk7CkgPFBdS5vgqYFl0zBsgWdKGDjnMYhDIBA9iAtWTIW9U7WYoBtYuTDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:27:51.493452Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.01703","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be137d6897dc375d8fbda95ab2e2f608449e2ded3dddc99042a5f06a1e051a07","sha256:42f37e6866dd4973f64a2984125b92b0900c2dba48f3207b37780936b6e1cb8e"],"state_sha256":"1cc491fa1749e73ea2f5e51709d21b67067722e59c5785d2792f83458a06e939"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VgwrLewfHpoHIdyML0NmF3K2j/3iNLQ31neYLwY+DDsSJ3Cev+b2IfummcJYREzXy2sWjfz6SfMaSw1DnOmdAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T21:55:55.828873Z","bundle_sha256":"4f263d42587a21c5db8558b5599ec8410a52c6097bf31ec21a350a7d0010628f"}}