{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:2XQ6J4TXVYYQ2BO7UDPWWOCM7Y","short_pith_number":"pith:2XQ6J4TX","canonical_record":{"source":{"id":"1310.4281","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-10-16T06:49:58Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"cf8a4b2d5897b959188d36e602b72654121166545ca9730ae8797910f09aa05a","abstract_canon_sha256":"28b68c67977da706bf82786de3a4c3eb157a16221b9991db009fa07c2c092280"},"schema_version":"1.0"},"canonical_sha256":"d5e1e4f277ae310d05dfa0df6b384cfe259c96f6394ba69cf9d914a6b79fb5d8","source":{"kind":"arxiv","id":"1310.4281","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.4281","created_at":"2026-05-18T02:59:34Z"},{"alias_kind":"arxiv_version","alias_value":"1310.4281v1","created_at":"2026-05-18T02:59:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.4281","created_at":"2026-05-18T02:59:34Z"},{"alias_kind":"pith_short_12","alias_value":"2XQ6J4TXVYYQ","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2XQ6J4TXVYYQ2BO7","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2XQ6J4TX","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:2XQ6J4TXVYYQ2BO7UDPWWOCM7Y","target":"record","payload":{"canonical_record":{"source":{"id":"1310.4281","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-10-16T06:49:58Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"cf8a4b2d5897b959188d36e602b72654121166545ca9730ae8797910f09aa05a","abstract_canon_sha256":"28b68c67977da706bf82786de3a4c3eb157a16221b9991db009fa07c2c092280"},"schema_version":"1.0"},"canonical_sha256":"d5e1e4f277ae310d05dfa0df6b384cfe259c96f6394ba69cf9d914a6b79fb5d8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:59:34.375483Z","signature_b64":"l1smtpPzvsqdRSrdmmnN6jaXYBmGaOOC5BRVQddoLT/IElaAvBQYdekB0/PmTc9L48gPQ4bet6NtJqLxAYpBBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5e1e4f277ae310d05dfa0df6b384cfe259c96f6394ba69cf9d914a6b79fb5d8","last_reissued_at":"2026-05-18T02:59:34.374754Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:59:34.374754Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.4281","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":"2026-05-18T02:59:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Dv5ZhhWpB3a4NUGANYe6naYCYD6PQx1JEqZ/LyzR2nZOkSaSswCDmP4eht/spAEkpc4X+fABXGLiU9+iao5MAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:39:34.776299Z"},"content_sha256":"6447263020cd338b3d2ca36fcc58eeb21ad8d8e073dd65a6fd220b4f8e73cb50","schema_version":"1.0","event_id":"sha256:6447263020cd338b3d2ca36fcc58eeb21ad8d8e073dd65a6fd220b4f8e73cb50"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:2XQ6J4TXVYYQ2BO7UDPWWOCM7Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Implementation of sub-nanoseconds TDC in FPGA: applications to time-of-flight analysis in muon radiography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.geo-ph"],"primary_cat":"physics.ins-det","authors_text":"C. Girerd (IPNL), D. Gibert (GR, IPGP), J.-C. Ianigro (IPNL), J. De Bremond D'ars (GR), J. Marteau (IPNL), K. Jourde (IPGP), S. Gardien (IPNL)","submitted_at":"2013-10-16T06:49:58Z","abstract_excerpt":"Time-of-flight (tof) techniques are standard techniques in high energy physics to determine particles propagation directions. Since particles velocities are generally close to c, the speed of light, and detectors typical dimensions at the meter level, the state-of-the-art tof techniques should reach sub-nanosecond timing resolution. Among the various techniques already available, the recently developed ring oscillator TDC ones, implemented in low cost FPGA, feature a very interesting figure of merit since a very good timing performance may be achieved with limited processing ressources. This i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.4281","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":"2026-05-18T02:59:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yu9UZ29CrGzjOfO4AVvzywGi8He7kNlg88WdTWzeLI4wXzL13xpBJv+PhuAGmYpB/kgdNBjlWDF2yovKQpdCBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:39:34.776908Z"},"content_sha256":"db71f6351044a0f2fe3ecbc2baf1f0e143c2980a9efbcf05b4edc8b2d76ab326","schema_version":"1.0","event_id":"sha256:db71f6351044a0f2fe3ecbc2baf1f0e143c2980a9efbcf05b4edc8b2d76ab326"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2XQ6J4TXVYYQ2BO7UDPWWOCM7Y/bundle.json","state_url":"https://pith.science/pith/2XQ6J4TXVYYQ2BO7UDPWWOCM7Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2XQ6J4TXVYYQ2BO7UDPWWOCM7Y/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":"2026-05-27T17:39:34Z","links":{"resolver":"https://pith.science/pith/2XQ6J4TXVYYQ2BO7UDPWWOCM7Y","bundle":"https://pith.science/pith/2XQ6J4TXVYYQ2BO7UDPWWOCM7Y/bundle.json","state":"https://pith.science/pith/2XQ6J4TXVYYQ2BO7UDPWWOCM7Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2XQ6J4TXVYYQ2BO7UDPWWOCM7Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2XQ6J4TXVYYQ2BO7UDPWWOCM7Y","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":"28b68c67977da706bf82786de3a4c3eb157a16221b9991db009fa07c2c092280","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-10-16T06:49:58Z","title_canon_sha256":"cf8a4b2d5897b959188d36e602b72654121166545ca9730ae8797910f09aa05a"},"schema_version":"1.0","source":{"id":"1310.4281","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.4281","created_at":"2026-05-18T02:59:34Z"},{"alias_kind":"arxiv_version","alias_value":"1310.4281v1","created_at":"2026-05-18T02:59:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.4281","created_at":"2026-05-18T02:59:34Z"},{"alias_kind":"pith_short_12","alias_value":"2XQ6J4TXVYYQ","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2XQ6J4TXVYYQ2BO7","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2XQ6J4TX","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:db71f6351044a0f2fe3ecbc2baf1f0e143c2980a9efbcf05b4edc8b2d76ab326","target":"graph","created_at":"2026-05-18T02:59:34Z","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":"Time-of-flight (tof) techniques are standard techniques in high energy physics to determine particles propagation directions. Since particles velocities are generally close to c, the speed of light, and detectors typical dimensions at the meter level, the state-of-the-art tof techniques should reach sub-nanosecond timing resolution. Among the various techniques already available, the recently developed ring oscillator TDC ones, implemented in low cost FPGA, feature a very interesting figure of merit since a very good timing performance may be achieved with limited processing ressources. This i","authors_text":"C. Girerd (IPNL), D. Gibert (GR, IPGP), J.-C. Ianigro (IPNL), J. De Bremond D'ars (GR), J. Marteau (IPNL), K. Jourde (IPGP), S. Gardien (IPNL)","cross_cats":["physics.geo-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-10-16T06:49:58Z","title":"Implementation of sub-nanoseconds TDC in FPGA: applications to time-of-flight analysis in muon radiography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.4281","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":"sha256:6447263020cd338b3d2ca36fcc58eeb21ad8d8e073dd65a6fd220b4f8e73cb50","target":"record","created_at":"2026-05-18T02:59:34Z","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":"28b68c67977da706bf82786de3a4c3eb157a16221b9991db009fa07c2c092280","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-10-16T06:49:58Z","title_canon_sha256":"cf8a4b2d5897b959188d36e602b72654121166545ca9730ae8797910f09aa05a"},"schema_version":"1.0","source":{"id":"1310.4281","kind":"arxiv","version":1}},"canonical_sha256":"d5e1e4f277ae310d05dfa0df6b384cfe259c96f6394ba69cf9d914a6b79fb5d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d5e1e4f277ae310d05dfa0df6b384cfe259c96f6394ba69cf9d914a6b79fb5d8","first_computed_at":"2026-05-18T02:59:34.374754Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:59:34.374754Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"l1smtpPzvsqdRSrdmmnN6jaXYBmGaOOC5BRVQddoLT/IElaAvBQYdekB0/PmTc9L48gPQ4bet6NtJqLxAYpBBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:59:34.375483Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.4281","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6447263020cd338b3d2ca36fcc58eeb21ad8d8e073dd65a6fd220b4f8e73cb50","sha256:db71f6351044a0f2fe3ecbc2baf1f0e143c2980a9efbcf05b4edc8b2d76ab326"],"state_sha256":"6cd59e458a94e06c58b2f247d0523852f82c92bbe4f880b2022b1f9f9ec9ff4d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gAAfwOUqPY4wouBnI6mFKqpNJLgMggb55cyjqHn/y/J6NvoiwtYVsYSLKmrZR+PVPOgoUtQGBlfwfEvZZDT+DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T17:39:34.779729Z","bundle_sha256":"f68b779c3bd93b56b32b3650f524a4d65291fe9e67dd367e971f44edb4e21a58"}}