{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:KTL4E6445UORFQ7OH6JYSIO6VS","short_pith_number":"pith:KTL4E644","canonical_record":{"source":{"id":"1904.09205","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-04-19T14:22:06Z","cross_cats_sorted":["physics.app-ph","physics.optics","physics.plasm-ph"],"title_canon_sha256":"1ab29c0e4ae9135975089686622ae1ad69af352fd1d17f5ee821f5514cddc5f9","abstract_canon_sha256":"9b0e2b6cfdd3f6b0ecd46e6b280097c461626c2e5868dcec832d5f215c37d8ad"},"schema_version":"1.0"},"canonical_sha256":"54d7c27b9ced1d12c3ee3f938921deacb045d3a6ad65e015cb558e26fec86bbe","source":{"kind":"arxiv","id":"1904.09205","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.09205","created_at":"2026-05-17T23:48:08Z"},{"alias_kind":"arxiv_version","alias_value":"1904.09205v1","created_at":"2026-05-17T23:48:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.09205","created_at":"2026-05-17T23:48:08Z"},{"alias_kind":"pith_short_12","alias_value":"KTL4E6445UOR","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"KTL4E6445UORFQ7O","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"KTL4E644","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:KTL4E6445UORFQ7OH6JYSIO6VS","target":"record","payload":{"canonical_record":{"source":{"id":"1904.09205","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-04-19T14:22:06Z","cross_cats_sorted":["physics.app-ph","physics.optics","physics.plasm-ph"],"title_canon_sha256":"1ab29c0e4ae9135975089686622ae1ad69af352fd1d17f5ee821f5514cddc5f9","abstract_canon_sha256":"9b0e2b6cfdd3f6b0ecd46e6b280097c461626c2e5868dcec832d5f215c37d8ad"},"schema_version":"1.0"},"canonical_sha256":"54d7c27b9ced1d12c3ee3f938921deacb045d3a6ad65e015cb558e26fec86bbe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:48:08.042347Z","signature_b64":"vOvWuxNy8HLEALHIbyclYup7BfVG0nFMTuCXiYPG4aQI80WMDdE/RBSkfGqLlVIl3ecxNJKq6NpEnbIdrhWUAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"54d7c27b9ced1d12c3ee3f938921deacb045d3a6ad65e015cb558e26fec86bbe","last_reissued_at":"2026-05-17T23:48:08.041712Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:48:08.041712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.09205","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":"2026-05-17T23:48:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4gY6BFFrP5bWt04FwW6kH1jNZrTx1Agx6E4X0p1OJO98hujC3ptu7I74gdDTUHkDugWlGLj2geRfLTrj3i/vAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:07:39.821690Z"},"content_sha256":"f249351eb67bf468a209b0dd1261930397ca10004b6665d45cc67105e2ea5a6d","schema_version":"1.0","event_id":"sha256:f249351eb67bf468a209b0dd1261930397ca10004b6665d45cc67105e2ea5a6d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:KTL4E6445UORFQ7OH6JYSIO6VS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Plasma Wakefield Accelerator Research 2019 - 2040: A community-driven UK roadmap compiled by the Plasma Wakefield Accelerator Steering Committee (PWASC)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.app-ph","physics.optics","physics.plasm-ph"],"primary_cat":"physics.acc-ph","authors_text":"Bernhard Hidding, Bruno Muratori, Carsten Welsch, Christopher Murphy, Gianluca Sarri, Guoxing Xia, Matthew Streeter, Matthew Wing, Rajeev Pattathil, Simon Hooker, Steven Jamison, Zulfikar Najmudin","submitted_at":"2019-04-19T14:22:06Z","abstract_excerpt":"The acceleration gradients generated in a laser- or beam-driven plasma wakefield accelerator are typically three orders of magnitude greater than those produced by a conventional accelerator, and hence plasma accelerators can open a route to a new generation of very compact machines. In addition, plasma-based accelerators can generate beams with unique properties, such as tens of kiloamp peak currents, attosecond bunch duration, ultrahigh brightness and intrinsic particle beam-laser pulse synchronization.\n  In this roadmap we review the status of plasma accelerator research in the UK. We outli"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.09205","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":"2026-05-17T23:48:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cUj+jdhnEdmehtDRTqWVOQhMkxg4/Wa3gCRF+1ghASKR441WxpyeW6UV0T2bcwM7GvbzzbcfA/Y5HHoiwqniDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:07:39.822165Z"},"content_sha256":"8a0ad332960faca9f459b449eeb8197942ecbc650067eb9af19e18643d5eaf0c","schema_version":"1.0","event_id":"sha256:8a0ad332960faca9f459b449eeb8197942ecbc650067eb9af19e18643d5eaf0c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KTL4E6445UORFQ7OH6JYSIO6VS/bundle.json","state_url":"https://pith.science/pith/KTL4E6445UORFQ7OH6JYSIO6VS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KTL4E6445UORFQ7OH6JYSIO6VS/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":"2026-05-28T04:07:39Z","links":{"resolver":"https://pith.science/pith/KTL4E6445UORFQ7OH6JYSIO6VS","bundle":"https://pith.science/pith/KTL4E6445UORFQ7OH6JYSIO6VS/bundle.json","state":"https://pith.science/pith/KTL4E6445UORFQ7OH6JYSIO6VS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KTL4E6445UORFQ7OH6JYSIO6VS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KTL4E6445UORFQ7OH6JYSIO6VS","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":"9b0e2b6cfdd3f6b0ecd46e6b280097c461626c2e5868dcec832d5f215c37d8ad","cross_cats_sorted":["physics.app-ph","physics.optics","physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-04-19T14:22:06Z","title_canon_sha256":"1ab29c0e4ae9135975089686622ae1ad69af352fd1d17f5ee821f5514cddc5f9"},"schema_version":"1.0","source":{"id":"1904.09205","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.09205","created_at":"2026-05-17T23:48:08Z"},{"alias_kind":"arxiv_version","alias_value":"1904.09205v1","created_at":"2026-05-17T23:48:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.09205","created_at":"2026-05-17T23:48:08Z"},{"alias_kind":"pith_short_12","alias_value":"KTL4E6445UOR","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"KTL4E6445UORFQ7O","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"KTL4E644","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:8a0ad332960faca9f459b449eeb8197942ecbc650067eb9af19e18643d5eaf0c","target":"graph","created_at":"2026-05-17T23:48:08Z","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 acceleration gradients generated in a laser- or beam-driven plasma wakefield accelerator are typically three orders of magnitude greater than those produced by a conventional accelerator, and hence plasma accelerators can open a route to a new generation of very compact machines. In addition, plasma-based accelerators can generate beams with unique properties, such as tens of kiloamp peak currents, attosecond bunch duration, ultrahigh brightness and intrinsic particle beam-laser pulse synchronization.\n  In this roadmap we review the status of plasma accelerator research in the UK. We outli","authors_text":"Bernhard Hidding, Bruno Muratori, Carsten Welsch, Christopher Murphy, Gianluca Sarri, Guoxing Xia, Matthew Streeter, Matthew Wing, Rajeev Pattathil, Simon Hooker, Steven Jamison, Zulfikar Najmudin","cross_cats":["physics.app-ph","physics.optics","physics.plasm-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-04-19T14:22:06Z","title":"Plasma Wakefield Accelerator Research 2019 - 2040: A community-driven UK roadmap compiled by the Plasma Wakefield Accelerator Steering Committee (PWASC)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.09205","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:f249351eb67bf468a209b0dd1261930397ca10004b6665d45cc67105e2ea5a6d","target":"record","created_at":"2026-05-17T23:48:08Z","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":"9b0e2b6cfdd3f6b0ecd46e6b280097c461626c2e5868dcec832d5f215c37d8ad","cross_cats_sorted":["physics.app-ph","physics.optics","physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-04-19T14:22:06Z","title_canon_sha256":"1ab29c0e4ae9135975089686622ae1ad69af352fd1d17f5ee821f5514cddc5f9"},"schema_version":"1.0","source":{"id":"1904.09205","kind":"arxiv","version":1}},"canonical_sha256":"54d7c27b9ced1d12c3ee3f938921deacb045d3a6ad65e015cb558e26fec86bbe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"54d7c27b9ced1d12c3ee3f938921deacb045d3a6ad65e015cb558e26fec86bbe","first_computed_at":"2026-05-17T23:48:08.041712Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:08.041712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vOvWuxNy8HLEALHIbyclYup7BfVG0nFMTuCXiYPG4aQI80WMDdE/RBSkfGqLlVIl3ecxNJKq6NpEnbIdrhWUAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:08.042347Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.09205","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f249351eb67bf468a209b0dd1261930397ca10004b6665d45cc67105e2ea5a6d","sha256:8a0ad332960faca9f459b449eeb8197942ecbc650067eb9af19e18643d5eaf0c"],"state_sha256":"adb2d541ff43aedef48f9320460395e3afeb2a4ba150105f65db42fab6ad8b4e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E9dYeCrC/jM+QaAC73h/+fFtpbxlUCnURTmeLS/PKr0i+OkgKYLQndF/nt+3GI52hAhALSzYn10/0xZRUzWmAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T04:07:39.824489Z","bundle_sha256":"78c7da925385491b0c375a5dd80535a10c8937a692e753ee24214f5d6433c975"}}