{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:JQHT4SS2EDUTDNO4ZRVF4J5QWF","short_pith_number":"pith:JQHT4SS2","canonical_record":{"source":{"id":"1504.06302","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-04-23T19:23:44Z","cross_cats_sorted":[],"title_canon_sha256":"1778d31f32e4259dacf6ecdc180db15d350b023c2405a1dc66be99922f8126b1","abstract_canon_sha256":"510fc7282b4f8ca56000b0ffe55d9ca5b1de9824ae86b64f7a8ba9503e20a19c"},"schema_version":"1.0"},"canonical_sha256":"4c0f3e4a5a20e931b5dccc6a5e27b0b1795c6b9afe12850f605c1b0e0b59bac9","source":{"kind":"arxiv","id":"1504.06302","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.06302","created_at":"2026-05-18T02:18:02Z"},{"alias_kind":"arxiv_version","alias_value":"1504.06302v1","created_at":"2026-05-18T02:18:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.06302","created_at":"2026-05-18T02:18:02Z"},{"alias_kind":"pith_short_12","alias_value":"JQHT4SS2EDUT","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JQHT4SS2EDUTDNO4","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JQHT4SS2","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:JQHT4SS2EDUTDNO4ZRVF4J5QWF","target":"record","payload":{"canonical_record":{"source":{"id":"1504.06302","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-04-23T19:23:44Z","cross_cats_sorted":[],"title_canon_sha256":"1778d31f32e4259dacf6ecdc180db15d350b023c2405a1dc66be99922f8126b1","abstract_canon_sha256":"510fc7282b4f8ca56000b0ffe55d9ca5b1de9824ae86b64f7a8ba9503e20a19c"},"schema_version":"1.0"},"canonical_sha256":"4c0f3e4a5a20e931b5dccc6a5e27b0b1795c6b9afe12850f605c1b0e0b59bac9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:18:02.017763Z","signature_b64":"y+quK+sit51wQMS+tHIlDWkGSiSsuDzlgmPcqC3GIy9R2+0oBAsoTzgLLMobvWhZFdIlgNWfv0hhU5kdoKOqAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4c0f3e4a5a20e931b5dccc6a5e27b0b1795c6b9afe12850f605c1b0e0b59bac9","last_reissued_at":"2026-05-18T02:18:02.017151Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:18:02.017151Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.06302","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":"2026-05-18T02:18:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xO+a5LGTpea72SgxEfqk00ytwBi6pNH3UCz1ve8uDUeb7EABQRSDFF58A6uGY/vJBHKalAkk6w0zJ1Ym8+qTAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T18:39:51.421495Z"},"content_sha256":"ca910db3864f6d39ef1a18a797d13af668a5faa91fa5af26e14eaff218c99f4e","schema_version":"1.0","event_id":"sha256:ca910db3864f6d39ef1a18a797d13af668a5faa91fa5af26e14eaff218c99f4e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:JQHT4SS2EDUTDNO4ZRVF4J5QWF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scheme for Low Energy Beam Transport with a non-neutralized section","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"A. Shemyakin, L. Prost","submitted_at":"2015-04-23T19:23:44Z","abstract_excerpt":"A typical Low Energy Beam Transport (LEBT) design relies on dynamics with nearly complete beam space charge neutralization over the entire length of the LEBT. This paper argues that, for a beam with modest perveance and uniform current density distribution when generated at the source, a downstream portion of the LEBT can be un-neutralized without significant emittance growth."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.06302","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":"2026-05-18T02:18:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gzjNbJdyLb8JpCme+kJyV8KoH7M5jGNYM7HSyouQx+FkSTIwusow91T0Jotx3zrhtFBjCrBUDeTLuFocqBWhDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T18:39:51.421836Z"},"content_sha256":"211dccf07efc7b8696f80a7e13495a8b9849282b6e4bb4989138e076cbb2e963","schema_version":"1.0","event_id":"sha256:211dccf07efc7b8696f80a7e13495a8b9849282b6e4bb4989138e076cbb2e963"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JQHT4SS2EDUTDNO4ZRVF4J5QWF/bundle.json","state_url":"https://pith.science/pith/JQHT4SS2EDUTDNO4ZRVF4J5QWF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JQHT4SS2EDUTDNO4ZRVF4J5QWF/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":"2026-05-20T18:39:51Z","links":{"resolver":"https://pith.science/pith/JQHT4SS2EDUTDNO4ZRVF4J5QWF","bundle":"https://pith.science/pith/JQHT4SS2EDUTDNO4ZRVF4J5QWF/bundle.json","state":"https://pith.science/pith/JQHT4SS2EDUTDNO4ZRVF4J5QWF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JQHT4SS2EDUTDNO4ZRVF4J5QWF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:JQHT4SS2EDUTDNO4ZRVF4J5QWF","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":"510fc7282b4f8ca56000b0ffe55d9ca5b1de9824ae86b64f7a8ba9503e20a19c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-04-23T19:23:44Z","title_canon_sha256":"1778d31f32e4259dacf6ecdc180db15d350b023c2405a1dc66be99922f8126b1"},"schema_version":"1.0","source":{"id":"1504.06302","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.06302","created_at":"2026-05-18T02:18:02Z"},{"alias_kind":"arxiv_version","alias_value":"1504.06302v1","created_at":"2026-05-18T02:18:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.06302","created_at":"2026-05-18T02:18:02Z"},{"alias_kind":"pith_short_12","alias_value":"JQHT4SS2EDUT","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JQHT4SS2EDUTDNO4","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JQHT4SS2","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:211dccf07efc7b8696f80a7e13495a8b9849282b6e4bb4989138e076cbb2e963","target":"graph","created_at":"2026-05-18T02:18:02Z","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 typical Low Energy Beam Transport (LEBT) design relies on dynamics with nearly complete beam space charge neutralization over the entire length of the LEBT. This paper argues that, for a beam with modest perveance and uniform current density distribution when generated at the source, a downstream portion of the LEBT can be un-neutralized without significant emittance growth.","authors_text":"A. Shemyakin, L. Prost","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-04-23T19:23:44Z","title":"Scheme for Low Energy Beam Transport with a non-neutralized section"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.06302","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:ca910db3864f6d39ef1a18a797d13af668a5faa91fa5af26e14eaff218c99f4e","target":"record","created_at":"2026-05-18T02:18:02Z","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":"510fc7282b4f8ca56000b0ffe55d9ca5b1de9824ae86b64f7a8ba9503e20a19c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-04-23T19:23:44Z","title_canon_sha256":"1778d31f32e4259dacf6ecdc180db15d350b023c2405a1dc66be99922f8126b1"},"schema_version":"1.0","source":{"id":"1504.06302","kind":"arxiv","version":1}},"canonical_sha256":"4c0f3e4a5a20e931b5dccc6a5e27b0b1795c6b9afe12850f605c1b0e0b59bac9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4c0f3e4a5a20e931b5dccc6a5e27b0b1795c6b9afe12850f605c1b0e0b59bac9","first_computed_at":"2026-05-18T02:18:02.017151Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:18:02.017151Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y+quK+sit51wQMS+tHIlDWkGSiSsuDzlgmPcqC3GIy9R2+0oBAsoTzgLLMobvWhZFdIlgNWfv0hhU5kdoKOqAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:18:02.017763Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.06302","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca910db3864f6d39ef1a18a797d13af668a5faa91fa5af26e14eaff218c99f4e","sha256:211dccf07efc7b8696f80a7e13495a8b9849282b6e4bb4989138e076cbb2e963"],"state_sha256":"4ec7620ef1e5c2d4f7448e85e84c3a0339803898cbb9b631bb0bffa6264e8cf1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TZsuIwtbw+1hAgOQ6po/4aS19Mqn0GrsLU4n9ZZKTWylKYtZCnLiu1Nx1bpcD2OREKwsugADFxVLcTmhMSpvBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T18:39:51.423778Z","bundle_sha256":"c87970ba5b7364c79904fda6ad7a5377b8881fdde1444fc3cb7e3ee94ae95528"}}