{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:LITYRBRDVKDW2WQQ2ZN4XBIIJM","short_pith_number":"pith:LITYRBRD","canonical_record":{"source":{"id":"1702.06601","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2017-02-14T13:20:22Z","cross_cats_sorted":["physics.optics","quant-ph"],"title_canon_sha256":"a7ed3f94fc9d14030aa4223b16afddf86054968816da336de09414d27062a170","abstract_canon_sha256":"fc9bbca1fc098d6afc5314e0a9ba4d9ccf13145c7d1aa0e024b8ffc27c70c6c7"},"schema_version":"1.0"},"canonical_sha256":"5a27888623aa876d5a10d65bcb85084b14ede1feefc5aaad56cc893d4a0eed18","source":{"kind":"arxiv","id":"1702.06601","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.06601","created_at":"2026-05-18T00:41:24Z"},{"alias_kind":"arxiv_version","alias_value":"1702.06601v1","created_at":"2026-05-18T00:41:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.06601","created_at":"2026-05-18T00:41:24Z"},{"alias_kind":"pith_short_12","alias_value":"LITYRBRDVKDW","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LITYRBRDVKDW2WQQ","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LITYRBRD","created_at":"2026-05-18T12:31:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:LITYRBRDVKDW2WQQ2ZN4XBIIJM","target":"record","payload":{"canonical_record":{"source":{"id":"1702.06601","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2017-02-14T13:20:22Z","cross_cats_sorted":["physics.optics","quant-ph"],"title_canon_sha256":"a7ed3f94fc9d14030aa4223b16afddf86054968816da336de09414d27062a170","abstract_canon_sha256":"fc9bbca1fc098d6afc5314e0a9ba4d9ccf13145c7d1aa0e024b8ffc27c70c6c7"},"schema_version":"1.0"},"canonical_sha256":"5a27888623aa876d5a10d65bcb85084b14ede1feefc5aaad56cc893d4a0eed18","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:41:24.764182Z","signature_b64":"eDO4JHvN9fabRafJSDsJRbJmWSJS/wvtwUtl4mqU/S6jFPbtjs6CtJlmG4XRuJJXYC7hF8Y5NcY8SX/Jy0UqBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a27888623aa876d5a10d65bcb85084b14ede1feefc5aaad56cc893d4a0eed18","last_reissued_at":"2026-05-18T00:41:24.763505Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:41:24.763505Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.06601","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":"2026-05-18T00:41:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k49zlFfrTBZpX0KEz/mlez15PUF+HY6bdzoaellbjExssa3Fy83FY5eVGMuO4uMOg8WZ6eaYO6jrVnOvE5uzBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T16:27:31.739182Z"},"content_sha256":"bb6ce83e2e64158238876851433ae0f5cb976ec1e7f702eca81b4aa5286d7f78","schema_version":"1.0","event_id":"sha256:bb6ce83e2e64158238876851433ae0f5cb976ec1e7f702eca81b4aa5286d7f78"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:LITYRBRDVKDW2WQQ2ZN4XBIIJM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Neutral Helium Atom Diffraction from a Micron Scale Periodic Structure: Photonic Crystal Membrane Characterization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics","quant-ph"],"primary_cat":"physics.class-ph","authors_text":"Bodil Holst, Ingve Simonsen, Jon Olav Grepstad, Sabrina D. Eder, Thomas Kaltenbacher, Torstein Nesse","submitted_at":"2017-02-14T13:20:22Z","abstract_excerpt":"Surface scattering of neutral helium beams created by supersonic expansion is an established technique for measuring structural and dynamical properties of surfaces on the atomic scale. Helium beams have also been used in Fraunhofer and Fresnel diffraction experiments. Due to the short wavelength of the atom beams of typically 0.1nm or less, Fraunhofer diffraction experiments in transmission have so far been limited to grating structures with a period (pitch) of up to 200nm. However, larger periods are of interest for several applications, for example for the characterization of photonic cryst"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.06601","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":"2026-05-18T00:41:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i6CrFmVYNkffiyG/5E36eA6Zm6RraYbPlVvBF7Vr+mJQHyxFdjvEl/z6sU3/WsYG2vIZ23xieiME/s9v1OojCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T16:27:31.739850Z"},"content_sha256":"a3a96e636a508f319787b499f818d839651f18cdf55a805dd63a1c3c703b4095","schema_version":"1.0","event_id":"sha256:a3a96e636a508f319787b499f818d839651f18cdf55a805dd63a1c3c703b4095"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LITYRBRDVKDW2WQQ2ZN4XBIIJM/bundle.json","state_url":"https://pith.science/pith/LITYRBRDVKDW2WQQ2ZN4XBIIJM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LITYRBRDVKDW2WQQ2ZN4XBIIJM/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":"2026-06-05T16:27:31Z","links":{"resolver":"https://pith.science/pith/LITYRBRDVKDW2WQQ2ZN4XBIIJM","bundle":"https://pith.science/pith/LITYRBRDVKDW2WQQ2ZN4XBIIJM/bundle.json","state":"https://pith.science/pith/LITYRBRDVKDW2WQQ2ZN4XBIIJM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LITYRBRDVKDW2WQQ2ZN4XBIIJM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:LITYRBRDVKDW2WQQ2ZN4XBIIJM","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":"fc9bbca1fc098d6afc5314e0a9ba4d9ccf13145c7d1aa0e024b8ffc27c70c6c7","cross_cats_sorted":["physics.optics","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2017-02-14T13:20:22Z","title_canon_sha256":"a7ed3f94fc9d14030aa4223b16afddf86054968816da336de09414d27062a170"},"schema_version":"1.0","source":{"id":"1702.06601","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.06601","created_at":"2026-05-18T00:41:24Z"},{"alias_kind":"arxiv_version","alias_value":"1702.06601v1","created_at":"2026-05-18T00:41:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.06601","created_at":"2026-05-18T00:41:24Z"},{"alias_kind":"pith_short_12","alias_value":"LITYRBRDVKDW","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LITYRBRDVKDW2WQQ","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LITYRBRD","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:a3a96e636a508f319787b499f818d839651f18cdf55a805dd63a1c3c703b4095","target":"graph","created_at":"2026-05-18T00:41:24Z","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":"Surface scattering of neutral helium beams created by supersonic expansion is an established technique for measuring structural and dynamical properties of surfaces on the atomic scale. Helium beams have also been used in Fraunhofer and Fresnel diffraction experiments. Due to the short wavelength of the atom beams of typically 0.1nm or less, Fraunhofer diffraction experiments in transmission have so far been limited to grating structures with a period (pitch) of up to 200nm. However, larger periods are of interest for several applications, for example for the characterization of photonic cryst","authors_text":"Bodil Holst, Ingve Simonsen, Jon Olav Grepstad, Sabrina D. Eder, Thomas Kaltenbacher, Torstein Nesse","cross_cats":["physics.optics","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2017-02-14T13:20:22Z","title":"Neutral Helium Atom Diffraction from a Micron Scale Periodic Structure: Photonic Crystal Membrane Characterization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.06601","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:bb6ce83e2e64158238876851433ae0f5cb976ec1e7f702eca81b4aa5286d7f78","target":"record","created_at":"2026-05-18T00:41:24Z","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":"fc9bbca1fc098d6afc5314e0a9ba4d9ccf13145c7d1aa0e024b8ffc27c70c6c7","cross_cats_sorted":["physics.optics","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2017-02-14T13:20:22Z","title_canon_sha256":"a7ed3f94fc9d14030aa4223b16afddf86054968816da336de09414d27062a170"},"schema_version":"1.0","source":{"id":"1702.06601","kind":"arxiv","version":1}},"canonical_sha256":"5a27888623aa876d5a10d65bcb85084b14ede1feefc5aaad56cc893d4a0eed18","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a27888623aa876d5a10d65bcb85084b14ede1feefc5aaad56cc893d4a0eed18","first_computed_at":"2026-05-18T00:41:24.763505Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:41:24.763505Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eDO4JHvN9fabRafJSDsJRbJmWSJS/wvtwUtl4mqU/S6jFPbtjs6CtJlmG4XRuJJXYC7hF8Y5NcY8SX/Jy0UqBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:41:24.764182Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.06601","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb6ce83e2e64158238876851433ae0f5cb976ec1e7f702eca81b4aa5286d7f78","sha256:a3a96e636a508f319787b499f818d839651f18cdf55a805dd63a1c3c703b4095"],"state_sha256":"70f6a28f5682faa5b93a681c247c137c5f937e52c7da561d90f764367ec9476f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cduodB53OmDDFSIAa/lnLS+2+pVYB43mwJpg9wLk7e7XVmFXIL3YYsYG+TYwZFYpvuXwGqgUrGSxXT/kHGe6Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T16:27:31.743193Z","bundle_sha256":"2455b2037d47891b9944e1450e2ae8d2715a1a4d9071343e724f6d94a095fb80"}}