{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:URK6AYVPIFB2QZ7GSLO27A4TBC","short_pith_number":"pith:URK6AYVP","canonical_record":{"source":{"id":"1707.00480","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2017-07-03T11:18:26Z","cross_cats_sorted":[],"title_canon_sha256":"d37a40031a66008447851edde161a5acb21c153ac5b4b282538b62fe4466e4e9","abstract_canon_sha256":"61749d5231d137b0da4032da5547f7f6e720334f5b43736f74ca8d5b005365f6"},"schema_version":"1.0"},"canonical_sha256":"a455e062af4143a867e692ddaf83930893f85ba89e5e54c4d2403de563ff653d","source":{"kind":"arxiv","id":"1707.00480","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.00480","created_at":"2026-05-18T00:32:08Z"},{"alias_kind":"arxiv_version","alias_value":"1707.00480v1","created_at":"2026-05-18T00:32:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.00480","created_at":"2026-05-18T00:32:08Z"},{"alias_kind":"pith_short_12","alias_value":"URK6AYVPIFB2","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"URK6AYVPIFB2QZ7G","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"URK6AYVP","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:URK6AYVPIFB2QZ7GSLO27A4TBC","target":"record","payload":{"canonical_record":{"source":{"id":"1707.00480","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2017-07-03T11:18:26Z","cross_cats_sorted":[],"title_canon_sha256":"d37a40031a66008447851edde161a5acb21c153ac5b4b282538b62fe4466e4e9","abstract_canon_sha256":"61749d5231d137b0da4032da5547f7f6e720334f5b43736f74ca8d5b005365f6"},"schema_version":"1.0"},"canonical_sha256":"a455e062af4143a867e692ddaf83930893f85ba89e5e54c4d2403de563ff653d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:32:08.921545Z","signature_b64":"BdbdNji+oVgMwsLT7JCnPohF8IFRSsAoFBvJn+WBvDyMUBKGg43uQ9+v6Lgz4bLqrlSMwbiiIy3ntrEF8HfzCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a455e062af4143a867e692ddaf83930893f85ba89e5e54c4d2403de563ff653d","last_reissued_at":"2026-05-18T00:32:08.920894Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:32:08.920894Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.00480","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":"2026-05-18T00:32:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DNjbqBufK61icoazz16np4EkxhvdgTty0wCLGkpjXo4AtBG2IGGBTXEMtrUmiRnJYXR0NBUZW+bxUJWaBieWAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:28:07.898692Z"},"content_sha256":"a46d1cc4e0ac84e0484d1ca481f62cee3f1c9ad092e7ea2ee61e2ee6122bf1f6","schema_version":"1.0","event_id":"sha256:a46d1cc4e0ac84e0484d1ca481f62cee3f1c9ad092e7ea2ee61e2ee6122bf1f6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:URK6AYVPIFB2QZ7GSLO27A4TBC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of enhanced absorption of laser radiation by nano structured targets in PIC simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"Amita Das, Chandrasekhar Shukla","submitted_at":"2017-07-03T11:18:26Z","abstract_excerpt":"It is well known that Brunel's vacuum heating mechanism is operative for laser energy absorption when the target plasma density rises sharply. For non-relativistic laser intensities and planar targets it is also necessary that the laser should strike the target at oblique incidence. The laser electric field at oblique incidence has a component normal to the surface to extract electrons from the target in the vacuum region for Brunel's mechanism to be operative. At relativistic laser intensities, oblique incidence is not necessarily required as the J x B force is significant and can extract ele"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.00480","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":"2026-05-18T00:32:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gaq1xsIUd8ooT2f5nx8n4X7eE2EjrAWAsc0BM8l657Akq2hRTT/5ePmMSWCbCLvAjn0l9ja2L8wDLS0iNDSSBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:28:07.899271Z"},"content_sha256":"ae429cb7dd5db67ffae0c9e79dcf6835c7e641dfcb58484a4182c1af2e35a790","schema_version":"1.0","event_id":"sha256:ae429cb7dd5db67ffae0c9e79dcf6835c7e641dfcb58484a4182c1af2e35a790"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/URK6AYVPIFB2QZ7GSLO27A4TBC/bundle.json","state_url":"https://pith.science/pith/URK6AYVPIFB2QZ7GSLO27A4TBC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/URK6AYVPIFB2QZ7GSLO27A4TBC/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":"2026-05-25T21:28:07Z","links":{"resolver":"https://pith.science/pith/URK6AYVPIFB2QZ7GSLO27A4TBC","bundle":"https://pith.science/pith/URK6AYVPIFB2QZ7GSLO27A4TBC/bundle.json","state":"https://pith.science/pith/URK6AYVPIFB2QZ7GSLO27A4TBC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/URK6AYVPIFB2QZ7GSLO27A4TBC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:URK6AYVPIFB2QZ7GSLO27A4TBC","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":"61749d5231d137b0da4032da5547f7f6e720334f5b43736f74ca8d5b005365f6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2017-07-03T11:18:26Z","title_canon_sha256":"d37a40031a66008447851edde161a5acb21c153ac5b4b282538b62fe4466e4e9"},"schema_version":"1.0","source":{"id":"1707.00480","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.00480","created_at":"2026-05-18T00:32:08Z"},{"alias_kind":"arxiv_version","alias_value":"1707.00480v1","created_at":"2026-05-18T00:32:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.00480","created_at":"2026-05-18T00:32:08Z"},{"alias_kind":"pith_short_12","alias_value":"URK6AYVPIFB2","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"URK6AYVPIFB2QZ7G","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"URK6AYVP","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:ae429cb7dd5db67ffae0c9e79dcf6835c7e641dfcb58484a4182c1af2e35a790","target":"graph","created_at":"2026-05-18T00:32:08Z","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":"It is well known that Brunel's vacuum heating mechanism is operative for laser energy absorption when the target plasma density rises sharply. For non-relativistic laser intensities and planar targets it is also necessary that the laser should strike the target at oblique incidence. The laser electric field at oblique incidence has a component normal to the surface to extract electrons from the target in the vacuum region for Brunel's mechanism to be operative. At relativistic laser intensities, oblique incidence is not necessarily required as the J x B force is significant and can extract ele","authors_text":"Amita Das, Chandrasekhar Shukla","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2017-07-03T11:18:26Z","title":"Observation of enhanced absorption of laser radiation by nano structured targets in PIC simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.00480","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:a46d1cc4e0ac84e0484d1ca481f62cee3f1c9ad092e7ea2ee61e2ee6122bf1f6","target":"record","created_at":"2026-05-18T00:32:08Z","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":"61749d5231d137b0da4032da5547f7f6e720334f5b43736f74ca8d5b005365f6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2017-07-03T11:18:26Z","title_canon_sha256":"d37a40031a66008447851edde161a5acb21c153ac5b4b282538b62fe4466e4e9"},"schema_version":"1.0","source":{"id":"1707.00480","kind":"arxiv","version":1}},"canonical_sha256":"a455e062af4143a867e692ddaf83930893f85ba89e5e54c4d2403de563ff653d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a455e062af4143a867e692ddaf83930893f85ba89e5e54c4d2403de563ff653d","first_computed_at":"2026-05-18T00:32:08.920894Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:08.920894Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BdbdNji+oVgMwsLT7JCnPohF8IFRSsAoFBvJn+WBvDyMUBKGg43uQ9+v6Lgz4bLqrlSMwbiiIy3ntrEF8HfzCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:08.921545Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.00480","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a46d1cc4e0ac84e0484d1ca481f62cee3f1c9ad092e7ea2ee61e2ee6122bf1f6","sha256:ae429cb7dd5db67ffae0c9e79dcf6835c7e641dfcb58484a4182c1af2e35a790"],"state_sha256":"2e45f65ccb51efa336bc6bcf910cd88b5978509111cc092ae69a92b4221a647b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+Gneb6CcudZAyq9Nb3vp8DuEmzEEkAn2POTknF73G8TJSYQHOemEILg/50T0/1nVUrSjhQRjgHgVokQsVgXFAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T21:28:07.902267Z","bundle_sha256":"184df38ebe1aef87d519971da5198f14068edbb0008d67fb5dc9036e79cae77f"}}