{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ZC7CBC2ABBOYJISVYDQIFYWV7B","short_pith_number":"pith:ZC7CBC2A","canonical_record":{"source":{"id":"1603.08489","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-03-28T19:10:00Z","cross_cats_sorted":[],"title_canon_sha256":"8b59c21d231d8c1ef1e32b192f013899ed5927f32be9ea07701846489e43c2cc","abstract_canon_sha256":"e86adc03ff4904d934176c63c34bffd40c4e4dc005c971bd7995a46232d1583e"},"schema_version":"1.0"},"canonical_sha256":"c8be208b40085d84a255c0e082e2d5f85edc929b11dcbf73e09f938178687a99","source":{"kind":"arxiv","id":"1603.08489","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.08489","created_at":"2026-05-18T00:43:30Z"},{"alias_kind":"arxiv_version","alias_value":"1603.08489v1","created_at":"2026-05-18T00:43:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.08489","created_at":"2026-05-18T00:43:30Z"},{"alias_kind":"pith_short_12","alias_value":"ZC7CBC2ABBOY","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZC7CBC2ABBOYJISV","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZC7CBC2A","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ZC7CBC2ABBOYJISVYDQIFYWV7B","target":"record","payload":{"canonical_record":{"source":{"id":"1603.08489","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-03-28T19:10:00Z","cross_cats_sorted":[],"title_canon_sha256":"8b59c21d231d8c1ef1e32b192f013899ed5927f32be9ea07701846489e43c2cc","abstract_canon_sha256":"e86adc03ff4904d934176c63c34bffd40c4e4dc005c971bd7995a46232d1583e"},"schema_version":"1.0"},"canonical_sha256":"c8be208b40085d84a255c0e082e2d5f85edc929b11dcbf73e09f938178687a99","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:43:30.752278Z","signature_b64":"+6/csnDWxWF+I+Abvo3eb/W4G/EzsAc37kd0PpEt6qQ44eMnNDWLqqKvGfB9HdolXff1RiaolBVLWLtuQAVzAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c8be208b40085d84a255c0e082e2d5f85edc929b11dcbf73e09f938178687a99","last_reissued_at":"2026-05-18T00:43:30.751792Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:43:30.751792Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.08489","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":"2026-05-18T00:43:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lTpSigEb93bId//gL46VCEvlAAsta4v3Jb649fDy4ra+FI1Z5dLLw/T18oongVQbT0NyyD/rmbzevAiMCt5+CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:22:14.901846Z"},"content_sha256":"7a39ff6cfa54b6c7bd998d96508a9f9d032d954d0349a8b1a47a7e721656fcbc","schema_version":"1.0","event_id":"sha256:7a39ff6cfa54b6c7bd998d96508a9f9d032d954d0349a8b1a47a7e721656fcbc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ZC7CBC2ABBOYJISVYDQIFYWV7B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Chirp mitigation of plasma-accelerated beams using a modulated plasma density","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"A. Martinez de la Ossa, A. R. Maier, B. Schmidt, C. Behrens, I. Dornmair, J. Grebenyuk, J. Osterhoff, K. Floettmann, M. Gross, M. Kirchen, N. Delbos, R. Assmann, R. Brinkmann, S. Jalas, T. Mehrling, V. Wacker","submitted_at":"2016-03-28T19:10:00Z","abstract_excerpt":"Plasma-based accelerators offer the possibility to drive future compact light sources and high-energy physics applications. Achieving good beam quality, especially a small beam energy spread, is still one of the major challenges. For stable transport, the beam is located in the focusing region of the wakefield which covers only the slope of the accelerating field. This, however, imprints a longitudinal energy correlation (chirp) along the bunch. Here, we propose an alternating focusing scheme in the plasma to mitigate the development of this chirp and thus maintain a small energy spread."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.08489","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":"2026-05-18T00:43:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0gYdX8iyUhmx8fd7QBM3/KWaCKeIlaFv6kRMycd7UOn8l97vT2+3/hjtyh+zNUCk2qCbyAtiOQ47acQVS8DXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:22:14.902255Z"},"content_sha256":"1302462313c69b738b2a375a0b67cf3e38ce5331e609dad7be69facf2f0ba414","schema_version":"1.0","event_id":"sha256:1302462313c69b738b2a375a0b67cf3e38ce5331e609dad7be69facf2f0ba414"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZC7CBC2ABBOYJISVYDQIFYWV7B/bundle.json","state_url":"https://pith.science/pith/ZC7CBC2ABBOYJISVYDQIFYWV7B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZC7CBC2ABBOYJISVYDQIFYWV7B/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":"2026-05-28T15:22:14Z","links":{"resolver":"https://pith.science/pith/ZC7CBC2ABBOYJISVYDQIFYWV7B","bundle":"https://pith.science/pith/ZC7CBC2ABBOYJISVYDQIFYWV7B/bundle.json","state":"https://pith.science/pith/ZC7CBC2ABBOYJISVYDQIFYWV7B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZC7CBC2ABBOYJISVYDQIFYWV7B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZC7CBC2ABBOYJISVYDQIFYWV7B","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":"e86adc03ff4904d934176c63c34bffd40c4e4dc005c971bd7995a46232d1583e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-03-28T19:10:00Z","title_canon_sha256":"8b59c21d231d8c1ef1e32b192f013899ed5927f32be9ea07701846489e43c2cc"},"schema_version":"1.0","source":{"id":"1603.08489","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.08489","created_at":"2026-05-18T00:43:30Z"},{"alias_kind":"arxiv_version","alias_value":"1603.08489v1","created_at":"2026-05-18T00:43:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.08489","created_at":"2026-05-18T00:43:30Z"},{"alias_kind":"pith_short_12","alias_value":"ZC7CBC2ABBOY","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZC7CBC2ABBOYJISV","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZC7CBC2A","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:1302462313c69b738b2a375a0b67cf3e38ce5331e609dad7be69facf2f0ba414","target":"graph","created_at":"2026-05-18T00:43:30Z","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":"Plasma-based accelerators offer the possibility to drive future compact light sources and high-energy physics applications. Achieving good beam quality, especially a small beam energy spread, is still one of the major challenges. For stable transport, the beam is located in the focusing region of the wakefield which covers only the slope of the accelerating field. This, however, imprints a longitudinal energy correlation (chirp) along the bunch. Here, we propose an alternating focusing scheme in the plasma to mitigate the development of this chirp and thus maintain a small energy spread.","authors_text":"A. Martinez de la Ossa, A. R. Maier, B. Schmidt, C. Behrens, I. Dornmair, J. Grebenyuk, J. Osterhoff, K. Floettmann, M. Gross, M. Kirchen, N. Delbos, R. Assmann, R. Brinkmann, S. Jalas, T. Mehrling, V. Wacker","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-03-28T19:10:00Z","title":"Chirp mitigation of plasma-accelerated beams using a modulated plasma density"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.08489","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":"sha256:7a39ff6cfa54b6c7bd998d96508a9f9d032d954d0349a8b1a47a7e721656fcbc","target":"record","created_at":"2026-05-18T00:43:30Z","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":"e86adc03ff4904d934176c63c34bffd40c4e4dc005c971bd7995a46232d1583e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-03-28T19:10:00Z","title_canon_sha256":"8b59c21d231d8c1ef1e32b192f013899ed5927f32be9ea07701846489e43c2cc"},"schema_version":"1.0","source":{"id":"1603.08489","kind":"arxiv","version":1}},"canonical_sha256":"c8be208b40085d84a255c0e082e2d5f85edc929b11dcbf73e09f938178687a99","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c8be208b40085d84a255c0e082e2d5f85edc929b11dcbf73e09f938178687a99","first_computed_at":"2026-05-18T00:43:30.751792Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:30.751792Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+6/csnDWxWF+I+Abvo3eb/W4G/EzsAc37kd0PpEt6qQ44eMnNDWLqqKvGfB9HdolXff1RiaolBVLWLtuQAVzAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:30.752278Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.08489","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a39ff6cfa54b6c7bd998d96508a9f9d032d954d0349a8b1a47a7e721656fcbc","sha256:1302462313c69b738b2a375a0b67cf3e38ce5331e609dad7be69facf2f0ba414"],"state_sha256":"a768e80a01a2f8b96c13c808a694897f16ae1bc9d66c8425f83097f8fb689315"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WtHGQgB0q8kCOiqnTVnNlxLUGwjKnnACyHNv3oW8EJtZZeDI5xUS3qvQjZIzZAWWsHq/0d5CuFMFtKYFcwaHBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T15:22:14.905853Z","bundle_sha256":"d24dc222a72b450783a245ce8bf3e8762edc4c278d4472b04e03baaba12e4bc6"}}