{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:2R4LRMKV5NN4WAJS77ZGI4Y4TL","short_pith_number":"pith:2R4LRMKV","canonical_record":{"source":{"id":"1711.02480","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-11-07T14:25:09Z","cross_cats_sorted":["physics.acc-ph"],"title_canon_sha256":"75cf16dbfb6e43811c176b72561763b8135aa780ca011d90a0dd16b942494ef7","abstract_canon_sha256":"2040e0bd5d1265a800b0dfe367c6ad043505486b1b88c27ad810cacebbacec34"},"schema_version":"1.0"},"canonical_sha256":"d478b8b155eb5bcb0132fff264731c9ad2ee755446c96d88ed2c32b9ddb22bab","source":{"kind":"arxiv","id":"1711.02480","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.02480","created_at":"2026-05-18T00:22:44Z"},{"alias_kind":"arxiv_version","alias_value":"1711.02480v2","created_at":"2026-05-18T00:22:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.02480","created_at":"2026-05-18T00:22:44Z"},{"alias_kind":"pith_short_12","alias_value":"2R4LRMKV5NN4","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2R4LRMKV5NN4WAJS","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2R4LRMKV","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:2R4LRMKV5NN4WAJS77ZGI4Y4TL","target":"record","payload":{"canonical_record":{"source":{"id":"1711.02480","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-11-07T14:25:09Z","cross_cats_sorted":["physics.acc-ph"],"title_canon_sha256":"75cf16dbfb6e43811c176b72561763b8135aa780ca011d90a0dd16b942494ef7","abstract_canon_sha256":"2040e0bd5d1265a800b0dfe367c6ad043505486b1b88c27ad810cacebbacec34"},"schema_version":"1.0"},"canonical_sha256":"d478b8b155eb5bcb0132fff264731c9ad2ee755446c96d88ed2c32b9ddb22bab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:44.385467Z","signature_b64":"KAqonduWi7HRdcSg2CyL9yB3BDy7n1mb1BI7Ux7G6PVqdGcR3jLXzy3oNMHSO3ODUt9NKpCIaYPMoO2kD7CwCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d478b8b155eb5bcb0132fff264731c9ad2ee755446c96d88ed2c32b9ddb22bab","last_reissued_at":"2026-05-18T00:22:44.385011Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:44.385011Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.02480","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":"2026-05-18T00:22:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rowbc6I0lhj8FvUqpC/xTr8UX4rJLxXo81kukFGxFmd/hB71SWM8wDqXLGNx+6Qs2X4ZizOPC0NOvtaSePqHAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T08:03:00.354936Z"},"content_sha256":"e821454fb8ed9f4b0436e52f761d01a8c629efbaf0ac886fa705973931ca5fa6","schema_version":"1.0","event_id":"sha256:e821454fb8ed9f4b0436e52f761d01a8c629efbaf0ac886fa705973931ca5fa6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:2R4LRMKV5NN4WAJS77ZGI4Y4TL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Realtime Tomography of Gas-Jets with a Wollaston Interferometer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.acc-ph"],"primary_cat":"physics.ins-det","authors_text":"A. Adelmann, B. Hermann, M.C. Kaluza, N. Sauerwein, R. Ischebeck, R. Tarkeshian, U. Locans","submitted_at":"2017-11-07T14:25:09Z","abstract_excerpt":"A tomographic gas-density diagnostic using a single-beam Wollaston interferometer able to characterise non-symmetric density distributions in gas jets is presented. A real-time tomographic algorithm is able to reconstruct three dimensional density distributions. A Maximum Likelihood -- Expectation Maximisation algorithm, an iterative method with good convergence properties compared to simple back projection, is used. With the use of graphical processing units, real time computation and high resolution are achieved. Two different gas jets are characterised: a kHz, piezo-driven jet for lower den"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.02480","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":""},"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":"2026-05-18T00:22:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Gj59UkfzYAOLdY+RKHaRITexy4tkJJ2W1K4veOzD8XQhF1tio4ZwDtBXdrgvBUKa0R0QiDRpT5W3Jb7Ydv1mDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T08:03:00.355350Z"},"content_sha256":"fa09fd85d371897b1adf05e5a38ecf453e9a76eb5b9a1335c8d04eebe49236f5","schema_version":"1.0","event_id":"sha256:fa09fd85d371897b1adf05e5a38ecf453e9a76eb5b9a1335c8d04eebe49236f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2R4LRMKV5NN4WAJS77ZGI4Y4TL/bundle.json","state_url":"https://pith.science/pith/2R4LRMKV5NN4WAJS77ZGI4Y4TL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2R4LRMKV5NN4WAJS77ZGI4Y4TL/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":"2026-05-24T08:03:00Z","links":{"resolver":"https://pith.science/pith/2R4LRMKV5NN4WAJS77ZGI4Y4TL","bundle":"https://pith.science/pith/2R4LRMKV5NN4WAJS77ZGI4Y4TL/bundle.json","state":"https://pith.science/pith/2R4LRMKV5NN4WAJS77ZGI4Y4TL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2R4LRMKV5NN4WAJS77ZGI4Y4TL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:2R4LRMKV5NN4WAJS77ZGI4Y4TL","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":"2040e0bd5d1265a800b0dfe367c6ad043505486b1b88c27ad810cacebbacec34","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-11-07T14:25:09Z","title_canon_sha256":"75cf16dbfb6e43811c176b72561763b8135aa780ca011d90a0dd16b942494ef7"},"schema_version":"1.0","source":{"id":"1711.02480","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.02480","created_at":"2026-05-18T00:22:44Z"},{"alias_kind":"arxiv_version","alias_value":"1711.02480v2","created_at":"2026-05-18T00:22:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.02480","created_at":"2026-05-18T00:22:44Z"},{"alias_kind":"pith_short_12","alias_value":"2R4LRMKV5NN4","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2R4LRMKV5NN4WAJS","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2R4LRMKV","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:fa09fd85d371897b1adf05e5a38ecf453e9a76eb5b9a1335c8d04eebe49236f5","target":"graph","created_at":"2026-05-18T00:22:44Z","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":"A tomographic gas-density diagnostic using a single-beam Wollaston interferometer able to characterise non-symmetric density distributions in gas jets is presented. A real-time tomographic algorithm is able to reconstruct three dimensional density distributions. A Maximum Likelihood -- Expectation Maximisation algorithm, an iterative method with good convergence properties compared to simple back projection, is used. With the use of graphical processing units, real time computation and high resolution are achieved. Two different gas jets are characterised: a kHz, piezo-driven jet for lower den","authors_text":"A. Adelmann, B. Hermann, M.C. Kaluza, N. Sauerwein, R. Ischebeck, R. Tarkeshian, U. Locans","cross_cats":["physics.acc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-11-07T14:25:09Z","title":"Realtime Tomography of Gas-Jets with a Wollaston Interferometer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.02480","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:e821454fb8ed9f4b0436e52f761d01a8c629efbaf0ac886fa705973931ca5fa6","target":"record","created_at":"2026-05-18T00:22:44Z","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":"2040e0bd5d1265a800b0dfe367c6ad043505486b1b88c27ad810cacebbacec34","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-11-07T14:25:09Z","title_canon_sha256":"75cf16dbfb6e43811c176b72561763b8135aa780ca011d90a0dd16b942494ef7"},"schema_version":"1.0","source":{"id":"1711.02480","kind":"arxiv","version":2}},"canonical_sha256":"d478b8b155eb5bcb0132fff264731c9ad2ee755446c96d88ed2c32b9ddb22bab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d478b8b155eb5bcb0132fff264731c9ad2ee755446c96d88ed2c32b9ddb22bab","first_computed_at":"2026-05-18T00:22:44.385011Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:44.385011Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KAqonduWi7HRdcSg2CyL9yB3BDy7n1mb1BI7Ux7G6PVqdGcR3jLXzy3oNMHSO3ODUt9NKpCIaYPMoO2kD7CwCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:44.385467Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.02480","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e821454fb8ed9f4b0436e52f761d01a8c629efbaf0ac886fa705973931ca5fa6","sha256:fa09fd85d371897b1adf05e5a38ecf453e9a76eb5b9a1335c8d04eebe49236f5"],"state_sha256":"1e413c5486cdac063ac7dec19df2d54101420608ab7903c0f80c3f3b41599ec8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"05PSrZ5iIgcRXGYpnPIQwnIS+554htpXEHANjLYUCenuUNavDJbpJvSh0IVLB5So3OzxF88ZyFORbivSPck7Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T08:03:00.358792Z","bundle_sha256":"fc4d70848b7a6a081aef6383d4880226cf2be3b68716374ad6648bfe8dffbc47"}}