{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:DQ2ZIPTF36F35LB4TCH3LFDOTY","short_pith_number":"pith:DQ2ZIPTF","canonical_record":{"source":{"id":"2102.03880","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-07T18:53:04Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"ad5a52a7eaa94505bf64f984268c98e6f502c091d1f376e61fe42a8f46cd28d3","abstract_canon_sha256":"045c4f6bf75ca3b2b8a2e2bdb2e21bad5521f0eb5cf2cdaabdc4e6f689082a12"},"schema_version":"1.0"},"canonical_sha256":"1c35943e65df8bbeac3c988fb5946e9e17c9d0fc8fd1f9b14851807f263015bc","source":{"kind":"arxiv","id":"2102.03880","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.03880","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"arxiv_version","alias_value":"2102.03880v2","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.03880","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"pith_short_12","alias_value":"DQ2ZIPTF36F3","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"pith_short_16","alias_value":"DQ2ZIPTF36F35LB4","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"pith_short_8","alias_value":"DQ2ZIPTF","created_at":"2026-07-05T02:41:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:DQ2ZIPTF36F35LB4TCH3LFDOTY","target":"record","payload":{"canonical_record":{"source":{"id":"2102.03880","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-07T18:53:04Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"ad5a52a7eaa94505bf64f984268c98e6f502c091d1f376e61fe42a8f46cd28d3","abstract_canon_sha256":"045c4f6bf75ca3b2b8a2e2bdb2e21bad5521f0eb5cf2cdaabdc4e6f689082a12"},"schema_version":"1.0"},"canonical_sha256":"1c35943e65df8bbeac3c988fb5946e9e17c9d0fc8fd1f9b14851807f263015bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:41:14.316840Z","signature_b64":"8/HvDhq4ra6M50DD3YIlddimrXYBw0IFKVSpQtKb2VbBQruchOgHlN97oa+B26NF1H+pn54g1s9yZaLqLOy3DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c35943e65df8bbeac3c988fb5946e9e17c9d0fc8fd1f9b14851807f263015bc","last_reissued_at":"2026-07-05T02:41:14.316282Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:41:14.316282Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.03880","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:41:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SgAUlFu8QkpkzdfoxlIwg27eAx/9DdWnANX0xVC+i85u8IjBqzSgP3aGzqUNI4PIBXsKLNXNntqhYLHYhXxtDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T04:32:16.294857Z"},"content_sha256":"04d6881fc8e0c139b22f167a96a2ad9a9c6e4372eb211dfc8c630d3d234b1ee7","schema_version":"1.0","event_id":"sha256:04d6881fc8e0c139b22f167a96a2ad9a9c6e4372eb211dfc8c630d3d234b1ee7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:DQ2ZIPTF36F35LB4TCH3LFDOTY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-ray Ptychography with a Laboratory Source","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"physics.app-ph","authors_text":"Andrew J. Parnell, Christoph Rau, Darren J. Batey, Frederic Van Assche, Matthieu N. Boone, Oleksandr O. Mykhaylyk, Sander Vanheule, Silvia Cipiccia","submitted_at":"2021-02-07T18:53:04Z","abstract_excerpt":"X-ray ptychography has revolutionised nanoscale phase contrast imaging at large-scale synchrotron sources in recent years. We present here the first successful demonstration of the technique in a small-scale laboratory setting. We conducted an experiment with a liquid metal-jet X-ray source and a single photon-counting detector with a high spectral resolution. The experiment used a spot size of 5 microns to produce a ptychographic phase image of a Siemens star test pattern with a sub-micron spatial resolution. The result and methodology presented show how high-resolution phase contrast imaging"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.03880","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2102.03880/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:41:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bzQNSxQy3+SpKhzwxghVAkNBbrIOHHGIhnh9jkAEfFc0c5ef/MAl+QjvKpv3RZgqKvJTHv4QTU/j2CRW/5QQAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T04:32:16.295287Z"},"content_sha256":"ce6355545b2b90f4e7fe8c098cfcf3d7f1ea8af7e224674c5f5df1e008aaf784","schema_version":"1.0","event_id":"sha256:ce6355545b2b90f4e7fe8c098cfcf3d7f1ea8af7e224674c5f5df1e008aaf784"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DQ2ZIPTF36F35LB4TCH3LFDOTY/bundle.json","state_url":"https://pith.science/pith/DQ2ZIPTF36F35LB4TCH3LFDOTY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DQ2ZIPTF36F35LB4TCH3LFDOTY/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":"2026-07-09T04:32:16Z","links":{"resolver":"https://pith.science/pith/DQ2ZIPTF36F35LB4TCH3LFDOTY","bundle":"https://pith.science/pith/DQ2ZIPTF36F35LB4TCH3LFDOTY/bundle.json","state":"https://pith.science/pith/DQ2ZIPTF36F35LB4TCH3LFDOTY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DQ2ZIPTF36F35LB4TCH3LFDOTY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:DQ2ZIPTF36F35LB4TCH3LFDOTY","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":"045c4f6bf75ca3b2b8a2e2bdb2e21bad5521f0eb5cf2cdaabdc4e6f689082a12","cross_cats_sorted":["physics.ins-det"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-07T18:53:04Z","title_canon_sha256":"ad5a52a7eaa94505bf64f984268c98e6f502c091d1f376e61fe42a8f46cd28d3"},"schema_version":"1.0","source":{"id":"2102.03880","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.03880","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"arxiv_version","alias_value":"2102.03880v2","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.03880","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"pith_short_12","alias_value":"DQ2ZIPTF36F3","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"pith_short_16","alias_value":"DQ2ZIPTF36F35LB4","created_at":"2026-07-05T02:41:14Z"},{"alias_kind":"pith_short_8","alias_value":"DQ2ZIPTF","created_at":"2026-07-05T02:41:14Z"}],"graph_snapshots":[{"event_id":"sha256:ce6355545b2b90f4e7fe8c098cfcf3d7f1ea8af7e224674c5f5df1e008aaf784","target":"graph","created_at":"2026-07-05T02:41:14Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2102.03880/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"X-ray ptychography has revolutionised nanoscale phase contrast imaging at large-scale synchrotron sources in recent years. We present here the first successful demonstration of the technique in a small-scale laboratory setting. We conducted an experiment with a liquid metal-jet X-ray source and a single photon-counting detector with a high spectral resolution. The experiment used a spot size of 5 microns to produce a ptychographic phase image of a Siemens star test pattern with a sub-micron spatial resolution. The result and methodology presented show how high-resolution phase contrast imaging","authors_text":"Andrew J. Parnell, Christoph Rau, Darren J. Batey, Frederic Van Assche, Matthieu N. Boone, Oleksandr O. Mykhaylyk, Sander Vanheule, Silvia Cipiccia","cross_cats":["physics.ins-det"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-07T18:53:04Z","title":"X-ray Ptychography with a Laboratory Source"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.03880","kind":"arxiv","version":2},"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":"sha256:04d6881fc8e0c139b22f167a96a2ad9a9c6e4372eb211dfc8c630d3d234b1ee7","target":"record","created_at":"2026-07-05T02:41:14Z","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":"045c4f6bf75ca3b2b8a2e2bdb2e21bad5521f0eb5cf2cdaabdc4e6f689082a12","cross_cats_sorted":["physics.ins-det"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-07T18:53:04Z","title_canon_sha256":"ad5a52a7eaa94505bf64f984268c98e6f502c091d1f376e61fe42a8f46cd28d3"},"schema_version":"1.0","source":{"id":"2102.03880","kind":"arxiv","version":2}},"canonical_sha256":"1c35943e65df8bbeac3c988fb5946e9e17c9d0fc8fd1f9b14851807f263015bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1c35943e65df8bbeac3c988fb5946e9e17c9d0fc8fd1f9b14851807f263015bc","first_computed_at":"2026-07-05T02:41:14.316282Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:41:14.316282Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8/HvDhq4ra6M50DD3YIlddimrXYBw0IFKVSpQtKb2VbBQruchOgHlN97oa+B26NF1H+pn54g1s9yZaLqLOy3DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:41:14.316840Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.03880","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:04d6881fc8e0c139b22f167a96a2ad9a9c6e4372eb211dfc8c630d3d234b1ee7","sha256:ce6355545b2b90f4e7fe8c098cfcf3d7f1ea8af7e224674c5f5df1e008aaf784"],"state_sha256":"7cd65c0e3b4cddab4faa77c8706b26685ef132c5f45d6e8753797423b46d9cc9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tk7SZOZAZ9cpYJISJDBPnK+qigjFpevbDoB0EGHXMsNILkuUubGtNmFd9ewsbhw7q6DnNx/zwRq6mw2fZIfDCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T04:32:16.297736Z","bundle_sha256":"96ebffe3fc3d4a987fb01904e52d8eef0cb026930e258fa81e8397f539b1d698"}}