{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:AHQTPJ4ZGUZ3X6KELL4UBJWSKQ","short_pith_number":"pith:AHQTPJ4Z","canonical_record":{"source":{"id":"2606.03295","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2026-06-02T08:07:46Z","cross_cats_sorted":[],"title_canon_sha256":"d538cde4b0dcaa9989476c4eff3f6e636f3b214e22aaa680af3ffca917965589","abstract_canon_sha256":"392459754060859a5e13aba932c9146049f5c558559e53b231ec6d69d358f17b"},"schema_version":"1.0"},"canonical_sha256":"01e137a7993533bbf9445af940a6d2542fecc511859c8e9d8348df854e2a61d8","source":{"kind":"arxiv","id":"2606.03295","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.03295","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"arxiv_version","alias_value":"2606.03295v1","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.03295","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_12","alias_value":"AHQTPJ4ZGUZ3","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_16","alias_value":"AHQTPJ4ZGUZ3X6KE","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_8","alias_value":"AHQTPJ4Z","created_at":"2026-06-03T01:05:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:AHQTPJ4ZGUZ3X6KELL4UBJWSKQ","target":"record","payload":{"canonical_record":{"source":{"id":"2606.03295","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2026-06-02T08:07:46Z","cross_cats_sorted":[],"title_canon_sha256":"d538cde4b0dcaa9989476c4eff3f6e636f3b214e22aaa680af3ffca917965589","abstract_canon_sha256":"392459754060859a5e13aba932c9146049f5c558559e53b231ec6d69d358f17b"},"schema_version":"1.0"},"canonical_sha256":"01e137a7993533bbf9445af940a6d2542fecc511859c8e9d8348df854e2a61d8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-03T01:05:54.258573Z","signature_b64":"esNdDlPcHwlAIg/1y3MdKTBdB77KzQWKj3es4/UHjP4Kw50GyU6nRF6OC+RN7PpWieokek61CX7qIU8PVBpnCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"01e137a7993533bbf9445af940a6d2542fecc511859c8e9d8348df854e2a61d8","last_reissued_at":"2026-06-03T01:05:54.258160Z","signature_status":"signed_v1","first_computed_at":"2026-06-03T01:05:54.258160Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.03295","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":"2026-06-03T01:05:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jIMd6ufGBNSugZ7pMPbdnP8KBrS7a8/MepKbuRxTodKh6zn8Wb7OQ6ylRS9DasjBr8fG4s2OeK+M5rWDOgDyAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T06:44:08.752561Z"},"content_sha256":"7ba9a0a46cfe4802b1a75a84178af8d42506f7b94888a30c904f98d3204ead81","schema_version":"1.0","event_id":"sha256:7ba9a0a46cfe4802b1a75a84178af8d42506f7b94888a30c904f98d3204ead81"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:AHQTPJ4ZGUZ3X6KELL4UBJWSKQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"GEM Production at the FTD in Bonn","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Adam Drozd, Alexis Rodrigues, Bernhard Ketzer, Dmitri Schaab, Markus Ball, Philip Hauer, Rui De Oliviera, Shania M\\\"uller, Tim Sch\\\"uttler","submitted_at":"2026-06-02T08:07:46Z","abstract_excerpt":"This manuscript describes the establishment of a local production line for 10 cm x 10 cm Gas Electron Multiplier (GEM) foils at the Forschungs- und Technologiezentrum Detektorphysik (FTD) at the university of Bonn. GEM foils are widely used in modern gaseous detectors, providing high-gain signal amplification and high-rate capability. Our fabrication process utilizes a double-mask photolithographic technique on 50 $\\mu$m polyimide cladded on both sides with 5 $\\mu$m copper. The chemical etching procedure that is required to achieve uniform hole geometries with outer hole diameters of 70 $\\mu$m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.03295","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.03295/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-06-03T01:05:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IlzhGALSjokmVEgfKR9zk/Biytb0Vr+YZOLITqxByHW+/7v6sOALO7RWpWNbO7XK1mrUy49ZtI+roRdyvg0RCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T06:44:08.752928Z"},"content_sha256":"d944e663edd70958040c49b4e46b31fa772ed4fc5e77f42058ab5f124b38b1ed","schema_version":"1.0","event_id":"sha256:d944e663edd70958040c49b4e46b31fa772ed4fc5e77f42058ab5f124b38b1ed"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AHQTPJ4ZGUZ3X6KELL4UBJWSKQ/bundle.json","state_url":"https://pith.science/pith/AHQTPJ4ZGUZ3X6KELL4UBJWSKQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AHQTPJ4ZGUZ3X6KELL4UBJWSKQ/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":"2026-06-29T06:44:08Z","links":{"resolver":"https://pith.science/pith/AHQTPJ4ZGUZ3X6KELL4UBJWSKQ","bundle":"https://pith.science/pith/AHQTPJ4ZGUZ3X6KELL4UBJWSKQ/bundle.json","state":"https://pith.science/pith/AHQTPJ4ZGUZ3X6KELL4UBJWSKQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AHQTPJ4ZGUZ3X6KELL4UBJWSKQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:AHQTPJ4ZGUZ3X6KELL4UBJWSKQ","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":"392459754060859a5e13aba932c9146049f5c558559e53b231ec6d69d358f17b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2026-06-02T08:07:46Z","title_canon_sha256":"d538cde4b0dcaa9989476c4eff3f6e636f3b214e22aaa680af3ffca917965589"},"schema_version":"1.0","source":{"id":"2606.03295","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.03295","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"arxiv_version","alias_value":"2606.03295v1","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.03295","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_12","alias_value":"AHQTPJ4ZGUZ3","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_16","alias_value":"AHQTPJ4ZGUZ3X6KE","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_8","alias_value":"AHQTPJ4Z","created_at":"2026-06-03T01:05:54Z"}],"graph_snapshots":[{"event_id":"sha256:d944e663edd70958040c49b4e46b31fa772ed4fc5e77f42058ab5f124b38b1ed","target":"graph","created_at":"2026-06-03T01:05:54Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.03295/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This manuscript describes the establishment of a local production line for 10 cm x 10 cm Gas Electron Multiplier (GEM) foils at the Forschungs- und Technologiezentrum Detektorphysik (FTD) at the university of Bonn. GEM foils are widely used in modern gaseous detectors, providing high-gain signal amplification and high-rate capability. Our fabrication process utilizes a double-mask photolithographic technique on 50 $\\mu$m polyimide cladded on both sides with 5 $\\mu$m copper. The chemical etching procedure that is required to achieve uniform hole geometries with outer hole diameters of 70 $\\mu$m","authors_text":"Adam Drozd, Alexis Rodrigues, Bernhard Ketzer, Dmitri Schaab, Markus Ball, Philip Hauer, Rui De Oliviera, Shania M\\\"uller, Tim Sch\\\"uttler","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2026-06-02T08:07:46Z","title":"GEM Production at the FTD in Bonn"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.03295","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":"sha256:7ba9a0a46cfe4802b1a75a84178af8d42506f7b94888a30c904f98d3204ead81","target":"record","created_at":"2026-06-03T01:05:54Z","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":"392459754060859a5e13aba932c9146049f5c558559e53b231ec6d69d358f17b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2026-06-02T08:07:46Z","title_canon_sha256":"d538cde4b0dcaa9989476c4eff3f6e636f3b214e22aaa680af3ffca917965589"},"schema_version":"1.0","source":{"id":"2606.03295","kind":"arxiv","version":1}},"canonical_sha256":"01e137a7993533bbf9445af940a6d2542fecc511859c8e9d8348df854e2a61d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01e137a7993533bbf9445af940a6d2542fecc511859c8e9d8348df854e2a61d8","first_computed_at":"2026-06-03T01:05:54.258160Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-03T01:05:54.258160Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"esNdDlPcHwlAIg/1y3MdKTBdB77KzQWKj3es4/UHjP4Kw50GyU6nRF6OC+RN7PpWieokek61CX7qIU8PVBpnCQ==","signature_status":"signed_v1","signed_at":"2026-06-03T01:05:54.258573Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.03295","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ba9a0a46cfe4802b1a75a84178af8d42506f7b94888a30c904f98d3204ead81","sha256:d944e663edd70958040c49b4e46b31fa772ed4fc5e77f42058ab5f124b38b1ed"],"state_sha256":"1038a59f28e2f128e9701ad0b942ebe714b10eee462261b83ef0a9aa7b18bf79"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SNDSWGtVDKxvlfcH/lkZtR4CIlZdyODRC5mANfuTjAHvc7xYSrXfZ7452CsHvOuq/mQoMHu5z3h1jlFMSD6NDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T06:44:08.754964Z","bundle_sha256":"743ce709d3575c8ffd2ef5d44d074481bf338121dd3cd94e0c695ee92f62836d"}}