{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:CBOLXTQHOTYAKTUDPLW3S4JPOA","short_pith_number":"pith:CBOLXTQH","canonical_record":{"source":{"id":"1311.0215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-01T16:14:18Z","cross_cats_sorted":[],"title_canon_sha256":"57832b2650d1932fa1cb36bb312e61b021ce50a9a2cf8cb1c7e67d6e71525afc","abstract_canon_sha256":"c682c8f146e01a856bda62ad8f1498867522d496e3ef8b05635e6444cfc57e01"},"schema_version":"1.0"},"canonical_sha256":"105cbbce0774f0054e837aedb9712f7016f09007d431a098702f8f0cc726f94e","source":{"kind":"arxiv","id":"1311.0215","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.0215","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"arxiv_version","alias_value":"1311.0215v1","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.0215","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"pith_short_12","alias_value":"CBOLXTQHOTYA","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CBOLXTQHOTYAKTUD","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CBOLXTQH","created_at":"2026-05-18T12:27:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:CBOLXTQHOTYAKTUDPLW3S4JPOA","target":"record","payload":{"canonical_record":{"source":{"id":"1311.0215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-01T16:14:18Z","cross_cats_sorted":[],"title_canon_sha256":"57832b2650d1932fa1cb36bb312e61b021ce50a9a2cf8cb1c7e67d6e71525afc","abstract_canon_sha256":"c682c8f146e01a856bda62ad8f1498867522d496e3ef8b05635e6444cfc57e01"},"schema_version":"1.0"},"canonical_sha256":"105cbbce0774f0054e837aedb9712f7016f09007d431a098702f8f0cc726f94e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:39.966979Z","signature_b64":"KAyZQOei/kbM5ZFzI6lfoXGIkAlZOPkuer2tkbl3zK3dgEqypG+fr8vPsjelYVyQpYk6JpiRb7Ecsx0Ld4dMAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"105cbbce0774f0054e837aedb9712f7016f09007d431a098702f8f0cc726f94e","last_reissued_at":"2026-05-18T01:46:39.966558Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:39.966558Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.0215","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":"2026-05-18T01:46:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fsG3sz1YPLXDSfm4jNuxAD8Z+qqMwdqtCxluMmFBDvQzN+Rsam2LrWRD1jCyt9LLg56Su4wfas3d87+OkP1RCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:31:07.016556Z"},"content_sha256":"d2dd47e98f8cf7d30cfbc31fcd21df8b27a368491014891506539d6867b3e23e","schema_version":"1.0","event_id":"sha256:d2dd47e98f8cf7d30cfbc31fcd21df8b27a368491014891506539d6867b3e23e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:CBOLXTQHOTYAKTUDPLW3S4JPOA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Development of Parallel Plate Avalanche Counter PPAC for BigRIPS fragment separator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"D. Kameda, H. Kumagai, H. Takeda, K. Yoshida, N. Fukuda, N. Inabe, T. Kubo, T. Ohnishi","submitted_at":"2013-11-01T16:14:18Z","abstract_excerpt":"We have developed a position-sensitive Parallel Plate Avalanche Counter (PPAC), which has been used as a focal plane detector in the BigRIPS fragment separator and the subsequent RI-beam delivery lines at the RIKEN Nishina Center RI Beam Factory. The PPAC detector plays an important role not only in the tuning of the separator and delivery lines but also in the particle identification of rare isotope (RI) beams. The PPAC detector has a sensitive area of 240 mm x 150 mm, and the position information is obtained by a delay-line readout method. Being called double PPAC, it is composed of two full"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.0215","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":"2026-05-18T01:46:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S1DKjX/IYOA3bwMS4fMlOy54ygyKrFFBVW36hYUJwzGWICqtZ3px1lXH7Tc019AeZe4dX+z9QYiTtPh/bBCjDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:31:07.016901Z"},"content_sha256":"84aaf0daec387e286c9c221dc8d6ba2f9ad81c0d1360791f70361bc75650bf4f","schema_version":"1.0","event_id":"sha256:84aaf0daec387e286c9c221dc8d6ba2f9ad81c0d1360791f70361bc75650bf4f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CBOLXTQHOTYAKTUDPLW3S4JPOA/bundle.json","state_url":"https://pith.science/pith/CBOLXTQHOTYAKTUDPLW3S4JPOA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CBOLXTQHOTYAKTUDPLW3S4JPOA/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":"2026-05-29T17:31:07Z","links":{"resolver":"https://pith.science/pith/CBOLXTQHOTYAKTUDPLW3S4JPOA","bundle":"https://pith.science/pith/CBOLXTQHOTYAKTUDPLW3S4JPOA/bundle.json","state":"https://pith.science/pith/CBOLXTQHOTYAKTUDPLW3S4JPOA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CBOLXTQHOTYAKTUDPLW3S4JPOA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:CBOLXTQHOTYAKTUDPLW3S4JPOA","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":"c682c8f146e01a856bda62ad8f1498867522d496e3ef8b05635e6444cfc57e01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-01T16:14:18Z","title_canon_sha256":"57832b2650d1932fa1cb36bb312e61b021ce50a9a2cf8cb1c7e67d6e71525afc"},"schema_version":"1.0","source":{"id":"1311.0215","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.0215","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"arxiv_version","alias_value":"1311.0215v1","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.0215","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"pith_short_12","alias_value":"CBOLXTQHOTYA","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CBOLXTQHOTYAKTUD","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CBOLXTQH","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:84aaf0daec387e286c9c221dc8d6ba2f9ad81c0d1360791f70361bc75650bf4f","target":"graph","created_at":"2026-05-18T01:46:39Z","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":"We have developed a position-sensitive Parallel Plate Avalanche Counter (PPAC), which has been used as a focal plane detector in the BigRIPS fragment separator and the subsequent RI-beam delivery lines at the RIKEN Nishina Center RI Beam Factory. The PPAC detector plays an important role not only in the tuning of the separator and delivery lines but also in the particle identification of rare isotope (RI) beams. The PPAC detector has a sensitive area of 240 mm x 150 mm, and the position information is obtained by a delay-line readout method. Being called double PPAC, it is composed of two full","authors_text":"D. Kameda, H. Kumagai, H. Takeda, K. Yoshida, N. Fukuda, N. Inabe, T. Kubo, T. Ohnishi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-01T16:14:18Z","title":"Development of Parallel Plate Avalanche Counter PPAC for BigRIPS fragment separator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.0215","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:d2dd47e98f8cf7d30cfbc31fcd21df8b27a368491014891506539d6867b3e23e","target":"record","created_at":"2026-05-18T01:46:39Z","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":"c682c8f146e01a856bda62ad8f1498867522d496e3ef8b05635e6444cfc57e01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-01T16:14:18Z","title_canon_sha256":"57832b2650d1932fa1cb36bb312e61b021ce50a9a2cf8cb1c7e67d6e71525afc"},"schema_version":"1.0","source":{"id":"1311.0215","kind":"arxiv","version":1}},"canonical_sha256":"105cbbce0774f0054e837aedb9712f7016f09007d431a098702f8f0cc726f94e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"105cbbce0774f0054e837aedb9712f7016f09007d431a098702f8f0cc726f94e","first_computed_at":"2026-05-18T01:46:39.966558Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:39.966558Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KAyZQOei/kbM5ZFzI6lfoXGIkAlZOPkuer2tkbl3zK3dgEqypG+fr8vPsjelYVyQpYk6JpiRb7Ecsx0Ld4dMAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:39.966979Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.0215","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d2dd47e98f8cf7d30cfbc31fcd21df8b27a368491014891506539d6867b3e23e","sha256:84aaf0daec387e286c9c221dc8d6ba2f9ad81c0d1360791f70361bc75650bf4f"],"state_sha256":"7b651978c32eb9aee8bda347381087ff3e1777ee45c951961dae1004317da602"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EX/+SdnAAEoFNLTubGeRnfmgZwXWR5rj+0Z0n7HcnX2r2EK+I861vjGPah1+B0tDsHMThg/qYLK8asorfur4AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T17:31:07.018980Z","bundle_sha256":"8180276cac4496c4ea5570ac84857114a73fb016566b9eee52d31d0442c1bc6c"}}