{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HE6MOKVEZIIU3F6BSH7HQZAFIV","short_pith_number":"pith:HE6MOKVE","canonical_record":{"source":{"id":"1804.09117","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-04-24T16:11:08Z","cross_cats_sorted":["physics.app-ph","physics.atom-ph"],"title_canon_sha256":"c33b26bf06affa6e12a25aa3b9615881808d797dbc0ddf2bcd15efb084268a42","abstract_canon_sha256":"3a28f35db31397225b9035025348b031ff6d0fb9faa089210f408832c92a349b"},"schema_version":"1.0"},"canonical_sha256":"393cc72aa4ca114d97c191fe786405454731bc8fc65c6d8dd4bfd51747b0d4b0","source":{"kind":"arxiv","id":"1804.09117","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.09117","created_at":"2026-05-17T23:52:07Z"},{"alias_kind":"arxiv_version","alias_value":"1804.09117v1","created_at":"2026-05-17T23:52:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09117","created_at":"2026-05-17T23:52:07Z"},{"alias_kind":"pith_short_12","alias_value":"HE6MOKVEZIIU","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HE6MOKVEZIIU3F6B","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HE6MOKVE","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HE6MOKVEZIIU3F6BSH7HQZAFIV","target":"record","payload":{"canonical_record":{"source":{"id":"1804.09117","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-04-24T16:11:08Z","cross_cats_sorted":["physics.app-ph","physics.atom-ph"],"title_canon_sha256":"c33b26bf06affa6e12a25aa3b9615881808d797dbc0ddf2bcd15efb084268a42","abstract_canon_sha256":"3a28f35db31397225b9035025348b031ff6d0fb9faa089210f408832c92a349b"},"schema_version":"1.0"},"canonical_sha256":"393cc72aa4ca114d97c191fe786405454731bc8fc65c6d8dd4bfd51747b0d4b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:07.769739Z","signature_b64":"afu0y/KG1/+8xkDln6ZdtudgSZK4RK6vkFj+A/g0JfBNrUiQmiNUX+N+YQxTtCeUz28EYjqyF3hCGEG0kmJWCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"393cc72aa4ca114d97c191fe786405454731bc8fc65c6d8dd4bfd51747b0d4b0","last_reissued_at":"2026-05-17T23:52:07.769392Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:07.769392Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.09117","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":"2026-05-17T23:52:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FmdEnKUiFN34Kphjkt/VYqW47J86/iUMYmUBTKUDRqaXYQiB3S6Y36AyY8JYaUZyyMJgGtUJwbUiRApS6FHMBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T16:24:56.319051Z"},"content_sha256":"143b3581995043818a7560f52a03706de2f46e853dfa5bdf6b842c1b160f512f","schema_version":"1.0","event_id":"sha256:143b3581995043818a7560f52a03706de2f46e853dfa5bdf6b842c1b160f512f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HE6MOKVEZIIU3F6BSH7HQZAFIV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extreme-ultraviolet refractive optics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.app-ph","physics.atom-ph"],"primary_cat":"physics.optics","authors_text":"Arnaud Rouz\\'ee, Bernd Sch\\\"utte, Geert Reitsma, Jochen Mikosch, Lorenz Drescher, Marc J. J. Vrakking, Nils Monserud, Oleg Kornilov, Tobias Witting","submitted_at":"2018-04-24T16:11:08Z","abstract_excerpt":"Refraction is a well-known optical phenomenon that alters the direction of light waves propagating through matter. Microscopes, lenses and prisms based on refraction are indispensable tools for controlling the properties of light beams at visible, infrared, ultraviolet and X-ray wavelengths. The large absorption of extreme-ultraviolet (XUV) radiation in matter, however, hinders the development of refractive lenses and prisms in this spectral region. Here, we demonstrate control over the refraction of XUV radiation by using a gas jet with a density gradient across the XUV beam profile. A gas ph"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09117","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":"2026-05-17T23:52:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BAXvw7Ad+E8zpcs0hb7pIrzxIXN6akLpyQpr9f+lH7r3L7isqmsTG9NCsOoARVS1eMRJYJWiTyfv9+T/15SQDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T16:24:56.319769Z"},"content_sha256":"048641d8df15b792dafa886fb7ffa9b429780ec2b99219ef90388dd3d1fd0d6d","schema_version":"1.0","event_id":"sha256:048641d8df15b792dafa886fb7ffa9b429780ec2b99219ef90388dd3d1fd0d6d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HE6MOKVEZIIU3F6BSH7HQZAFIV/bundle.json","state_url":"https://pith.science/pith/HE6MOKVEZIIU3F6BSH7HQZAFIV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HE6MOKVEZIIU3F6BSH7HQZAFIV/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":"2026-06-06T16:24:56Z","links":{"resolver":"https://pith.science/pith/HE6MOKVEZIIU3F6BSH7HQZAFIV","bundle":"https://pith.science/pith/HE6MOKVEZIIU3F6BSH7HQZAFIV/bundle.json","state":"https://pith.science/pith/HE6MOKVEZIIU3F6BSH7HQZAFIV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HE6MOKVEZIIU3F6BSH7HQZAFIV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HE6MOKVEZIIU3F6BSH7HQZAFIV","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":"3a28f35db31397225b9035025348b031ff6d0fb9faa089210f408832c92a349b","cross_cats_sorted":["physics.app-ph","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-04-24T16:11:08Z","title_canon_sha256":"c33b26bf06affa6e12a25aa3b9615881808d797dbc0ddf2bcd15efb084268a42"},"schema_version":"1.0","source":{"id":"1804.09117","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.09117","created_at":"2026-05-17T23:52:07Z"},{"alias_kind":"arxiv_version","alias_value":"1804.09117v1","created_at":"2026-05-17T23:52:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09117","created_at":"2026-05-17T23:52:07Z"},{"alias_kind":"pith_short_12","alias_value":"HE6MOKVEZIIU","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HE6MOKVEZIIU3F6B","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HE6MOKVE","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:048641d8df15b792dafa886fb7ffa9b429780ec2b99219ef90388dd3d1fd0d6d","target":"graph","created_at":"2026-05-17T23:52:07Z","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":"Refraction is a well-known optical phenomenon that alters the direction of light waves propagating through matter. Microscopes, lenses and prisms based on refraction are indispensable tools for controlling the properties of light beams at visible, infrared, ultraviolet and X-ray wavelengths. The large absorption of extreme-ultraviolet (XUV) radiation in matter, however, hinders the development of refractive lenses and prisms in this spectral region. Here, we demonstrate control over the refraction of XUV radiation by using a gas jet with a density gradient across the XUV beam profile. A gas ph","authors_text":"Arnaud Rouz\\'ee, Bernd Sch\\\"utte, Geert Reitsma, Jochen Mikosch, Lorenz Drescher, Marc J. J. Vrakking, Nils Monserud, Oleg Kornilov, Tobias Witting","cross_cats":["physics.app-ph","physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-04-24T16:11:08Z","title":"Extreme-ultraviolet refractive optics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09117","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":"sha256:143b3581995043818a7560f52a03706de2f46e853dfa5bdf6b842c1b160f512f","target":"record","created_at":"2026-05-17T23:52:07Z","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":"3a28f35db31397225b9035025348b031ff6d0fb9faa089210f408832c92a349b","cross_cats_sorted":["physics.app-ph","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-04-24T16:11:08Z","title_canon_sha256":"c33b26bf06affa6e12a25aa3b9615881808d797dbc0ddf2bcd15efb084268a42"},"schema_version":"1.0","source":{"id":"1804.09117","kind":"arxiv","version":1}},"canonical_sha256":"393cc72aa4ca114d97c191fe786405454731bc8fc65c6d8dd4bfd51747b0d4b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"393cc72aa4ca114d97c191fe786405454731bc8fc65c6d8dd4bfd51747b0d4b0","first_computed_at":"2026-05-17T23:52:07.769392Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:07.769392Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"afu0y/KG1/+8xkDln6ZdtudgSZK4RK6vkFj+A/g0JfBNrUiQmiNUX+N+YQxTtCeUz28EYjqyF3hCGEG0kmJWCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:07.769739Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.09117","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:143b3581995043818a7560f52a03706de2f46e853dfa5bdf6b842c1b160f512f","sha256:048641d8df15b792dafa886fb7ffa9b429780ec2b99219ef90388dd3d1fd0d6d"],"state_sha256":"f2cc2b6f75a5a22d0d83f4664c9a10107a76bf0e6ea0d238403874c4286b2c47"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GWv+d+wMt/sqG3QVe1/OB/3T7J+EYJDwP2I7JK6dN3pwCdv7Vv/dEsN5hFRqLpH7LMHZpfFyJIPQp5ro1T1qDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T16:24:56.324070Z","bundle_sha256":"f9ecb3ec2e29b2a8111b4058837a92e1c6447494d67053916242be67a31c76eb"}}