{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:AKNSUBQKBLV63DJ42WKIXE6VAC","short_pith_number":"pith:AKNSUBQK","canonical_record":{"source":{"id":"1702.06713","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-02-22T09:09:14Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"e3bac5b5029f9a0bf14121ae3832da13955cc772b14fa6170cab4896343b5cc5","abstract_canon_sha256":"dc32448a4d258b378b93e9c2fe78240b5530bb3319a3aa80c9a900935b1abab5"},"schema_version":"1.0"},"canonical_sha256":"029b2a060a0aebed8d3cd5948b93d500ae15827078d4350eba479f26079c2cf9","source":{"kind":"arxiv","id":"1702.06713","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.06713","created_at":"2026-05-18T00:49:09Z"},{"alias_kind":"arxiv_version","alias_value":"1702.06713v1","created_at":"2026-05-18T00:49:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.06713","created_at":"2026-05-18T00:49:09Z"},{"alias_kind":"pith_short_12","alias_value":"AKNSUBQKBLV6","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"AKNSUBQKBLV63DJ4","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"AKNSUBQK","created_at":"2026-05-18T12:31:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:AKNSUBQKBLV63DJ42WKIXE6VAC","target":"record","payload":{"canonical_record":{"source":{"id":"1702.06713","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-02-22T09:09:14Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"e3bac5b5029f9a0bf14121ae3832da13955cc772b14fa6170cab4896343b5cc5","abstract_canon_sha256":"dc32448a4d258b378b93e9c2fe78240b5530bb3319a3aa80c9a900935b1abab5"},"schema_version":"1.0"},"canonical_sha256":"029b2a060a0aebed8d3cd5948b93d500ae15827078d4350eba479f26079c2cf9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:09.003073Z","signature_b64":"XopJMXalQSko2N+ZEwSnhV+8Z3cFTSWn2zUShigaqzTQ1vYOt/pzI4Z8Pw4zgIRtlyP4XwgFEnjH/EepWUNrCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"029b2a060a0aebed8d3cd5948b93d500ae15827078d4350eba479f26079c2cf9","last_reissued_at":"2026-05-18T00:49:09.002594Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:09.002594Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.06713","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":"2026-05-18T00:49:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2fWMUdWC4vLhj1sz3m1rIDj3OFrf49WmpNkgvRx1SwwTEdtYoH+V465KMow1Z8XwWUqekwZDA1lccbMv+IkMBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T21:44:51.422500Z"},"content_sha256":"59460c4d3c63840ebde6c3d59945c52cb29b00e33727f2a83b02c4e75533e6f9","schema_version":"1.0","event_id":"sha256:59460c4d3c63840ebde6c3d59945c52cb29b00e33727f2a83b02c4e75533e6f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:AKNSUBQKBLV63DJ42WKIXE6VAC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The ARAGORN front-end - An FPGA based implementation of a Time-to-Digital Converter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.ins-det","authors_text":"Carl Schaffer, Florian Herrmann, Horst Fischer, Maximilian B\\\"uchele","submitted_at":"2017-02-22T09:09:14Z","abstract_excerpt":"We present the ARAGORN front-end, a cost-optimized, high-density Time-to-Digital Converter platform. Four Xilinx Artix-7 FPGAs implement 384 channels with an average time resolution of 165 ps on a single module. A fifth FPGA acts as data concentrator and generic board master. The front-end features a SFP+ transceiver for data output and an optional multi-channel optical transceiver slot to interconnect with up to seven boards though a star topology. This novel approach makes it possible to read out up to eight boards yielding 3072 input channels via a single optical fiber at a bandwidth of 6.6"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.06713","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":"2026-05-18T00:49:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cZ3nXN6NjTEKyATFxdb2F5ad/dG7IbGnk6u93UqqMzipzl+B0zUuCIDtOvCeYHs+iOeaRKzlha76HxmQ8i0vAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T21:44:51.422967Z"},"content_sha256":"1f13bf3c66f1bf1c600f2507c25ebe4299fc0645a6815b4247792cc4b1be8cff","schema_version":"1.0","event_id":"sha256:1f13bf3c66f1bf1c600f2507c25ebe4299fc0645a6815b4247792cc4b1be8cff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AKNSUBQKBLV63DJ42WKIXE6VAC/bundle.json","state_url":"https://pith.science/pith/AKNSUBQKBLV63DJ42WKIXE6VAC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AKNSUBQKBLV63DJ42WKIXE6VAC/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":"2026-08-03T21:44:51Z","links":{"resolver":"https://pith.science/pith/AKNSUBQKBLV63DJ42WKIXE6VAC","bundle":"https://pith.science/pith/AKNSUBQKBLV63DJ42WKIXE6VAC/bundle.json","state":"https://pith.science/pith/AKNSUBQKBLV63DJ42WKIXE6VAC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AKNSUBQKBLV63DJ42WKIXE6VAC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:AKNSUBQKBLV63DJ42WKIXE6VAC","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":"dc32448a4d258b378b93e9c2fe78240b5530bb3319a3aa80c9a900935b1abab5","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-02-22T09:09:14Z","title_canon_sha256":"e3bac5b5029f9a0bf14121ae3832da13955cc772b14fa6170cab4896343b5cc5"},"schema_version":"1.0","source":{"id":"1702.06713","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.06713","created_at":"2026-05-18T00:49:09Z"},{"alias_kind":"arxiv_version","alias_value":"1702.06713v1","created_at":"2026-05-18T00:49:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.06713","created_at":"2026-05-18T00:49:09Z"},{"alias_kind":"pith_short_12","alias_value":"AKNSUBQKBLV6","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"AKNSUBQKBLV63DJ4","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"AKNSUBQK","created_at":"2026-05-18T12:31:05Z"}],"graph_snapshots":[{"event_id":"sha256:1f13bf3c66f1bf1c600f2507c25ebe4299fc0645a6815b4247792cc4b1be8cff","target":"graph","created_at":"2026-05-18T00:49:09Z","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 present the ARAGORN front-end, a cost-optimized, high-density Time-to-Digital Converter platform. Four Xilinx Artix-7 FPGAs implement 384 channels with an average time resolution of 165 ps on a single module. A fifth FPGA acts as data concentrator and generic board master. The front-end features a SFP+ transceiver for data output and an optional multi-channel optical transceiver slot to interconnect with up to seven boards though a star topology. This novel approach makes it possible to read out up to eight boards yielding 3072 input channels via a single optical fiber at a bandwidth of 6.6","authors_text":"Carl Schaffer, Florian Herrmann, Horst Fischer, Maximilian B\\\"uchele","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-02-22T09:09:14Z","title":"The ARAGORN front-end - An FPGA based implementation of a Time-to-Digital Converter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.06713","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":"sha256:59460c4d3c63840ebde6c3d59945c52cb29b00e33727f2a83b02c4e75533e6f9","target":"record","created_at":"2026-05-18T00:49:09Z","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":"dc32448a4d258b378b93e9c2fe78240b5530bb3319a3aa80c9a900935b1abab5","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-02-22T09:09:14Z","title_canon_sha256":"e3bac5b5029f9a0bf14121ae3832da13955cc772b14fa6170cab4896343b5cc5"},"schema_version":"1.0","source":{"id":"1702.06713","kind":"arxiv","version":1}},"canonical_sha256":"029b2a060a0aebed8d3cd5948b93d500ae15827078d4350eba479f26079c2cf9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"029b2a060a0aebed8d3cd5948b93d500ae15827078d4350eba479f26079c2cf9","first_computed_at":"2026-05-18T00:49:09.002594Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:49:09.002594Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XopJMXalQSko2N+ZEwSnhV+8Z3cFTSWn2zUShigaqzTQ1vYOt/pzI4Z8Pw4zgIRtlyP4XwgFEnjH/EepWUNrCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:49:09.003073Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.06713","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:59460c4d3c63840ebde6c3d59945c52cb29b00e33727f2a83b02c4e75533e6f9","sha256:1f13bf3c66f1bf1c600f2507c25ebe4299fc0645a6815b4247792cc4b1be8cff"],"state_sha256":"443c3c59568f7f2b4483222588bc93b2d617fdbc9a7171470c1b85e4967c5136"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vLK/o4X76n9L8bW3fDtdO42KtGjlu8wvnTVj+a+hAxUPJCcjbIO/2q/gKO5p6F73yAckOAb4Q9vBBiSThjaaBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T21:44:51.427775Z","bundle_sha256":"bf67f62f1d850b7404409ff009beff914d09a2699b851db28b8bb3414c2bf5f8"}}