{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:5W5YYHR3QM7UXRRD2755GLTDVS","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":"1ad122deaa855742bb613b872ecc9dea82c7342b53f7de3ddb68c8ee2a5f1494","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2017-04-28T07:40:57Z","title_canon_sha256":"ac3fbffbbd914c9b6ef93f8eb57d849d7d6346796d2f2cd69f0c785dd57b42a7"},"schema_version":"1.0","source":{"id":"1704.08831","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.08831","created_at":"2026-05-18T00:35:20Z"},{"alias_kind":"arxiv_version","alias_value":"1704.08831v1","created_at":"2026-05-18T00:35:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.08831","created_at":"2026-05-18T00:35:20Z"},{"alias_kind":"pith_short_12","alias_value":"5W5YYHR3QM7U","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"5W5YYHR3QM7UXRRD","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"5W5YYHR3","created_at":"2026-05-18T12:31:00Z"}],"graph_snapshots":[{"event_id":"sha256:268a222e749b54d8756c360e20401b5dadd41fe5a7e93d67862a085af7e71d42","target":"graph","created_at":"2026-05-18T00:35:20Z","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":"Ion acceleration using a laser pulse irradiating a thin disk target is examined using three-dimensional and two-dimensional particle-in-cell simulations. A laser pulse of $620$ TW, with an intensity of $5\\times 10^{21}$ W/cm$^{2}$ and a duration time of $27$ fs is irradiated on a double-layer target. Simulations are performed by varying the ion density, i.e., electron density, of the first layer. It is shown that the obtained proton energy jumps at a certain density of the first layer, which is made of a \"light\" material such as carbon; that is, Coulomb explosion of the target and radiation pr","authors_text":"Toshimasa Morita","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2017-04-28T07:40:57Z","title":"Proton energy behavior by variation of the target density in laser acceleration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.08831","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:bddc22c96b0bc013d624522df150de67c9392a03544d166522108a93740e969f","target":"record","created_at":"2026-05-18T00:35:20Z","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":"1ad122deaa855742bb613b872ecc9dea82c7342b53f7de3ddb68c8ee2a5f1494","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2017-04-28T07:40:57Z","title_canon_sha256":"ac3fbffbbd914c9b6ef93f8eb57d849d7d6346796d2f2cd69f0c785dd57b42a7"},"schema_version":"1.0","source":{"id":"1704.08831","kind":"arxiv","version":1}},"canonical_sha256":"edbb8c1e3b833f4bc623d7fbd32e63acbd766be46b9de6e330f243ccfa23ae4f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"edbb8c1e3b833f4bc623d7fbd32e63acbd766be46b9de6e330f243ccfa23ae4f","first_computed_at":"2026-05-18T00:35:20.875683Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:35:20.875683Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PdtgmHW+4YNBWbccJbeB7ZnA6XZ8NQNKt6nPfikvHYxzmpkqj6A9nzKdioNMBS1ra8xAhFkmXYiCF9XM1C9BAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:35:20.876150Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.08831","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bddc22c96b0bc013d624522df150de67c9392a03544d166522108a93740e969f","sha256:268a222e749b54d8756c360e20401b5dadd41fe5a7e93d67862a085af7e71d42"],"state_sha256":"e72c4bb2f72fb33f17f0b61ebe6600cc51232d1ccec9276f005738231b7caa37"}