{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:AASSHQP2ZNTV52MKGNZ3WDSFZM","short_pith_number":"pith:AASSHQP2","canonical_record":{"source":{"id":"1411.6659","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-24T21:37:43Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"074b039f4461e41d8d001737a583990112ebe5adc3fac3455d05163c7203c540","abstract_canon_sha256":"5d7f3f325cfb107392c1032eb5586ecd59573dfc73840fc65c227577f8bf9489"},"schema_version":"1.0"},"canonical_sha256":"002523c1facb675ee98a3373bb0e45cb04b57b0f5d939242c06de54f70e0ae5f","source":{"kind":"arxiv","id":"1411.6659","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.6659","created_at":"2026-05-18T01:25:02Z"},{"alias_kind":"arxiv_version","alias_value":"1411.6659v1","created_at":"2026-05-18T01:25:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.6659","created_at":"2026-05-18T01:25:02Z"},{"alias_kind":"pith_short_12","alias_value":"AASSHQP2ZNTV","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"AASSHQP2ZNTV52MK","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"AASSHQP2","created_at":"2026-05-18T12:28:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:AASSHQP2ZNTV52MKGNZ3WDSFZM","target":"record","payload":{"canonical_record":{"source":{"id":"1411.6659","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-24T21:37:43Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"074b039f4461e41d8d001737a583990112ebe5adc3fac3455d05163c7203c540","abstract_canon_sha256":"5d7f3f325cfb107392c1032eb5586ecd59573dfc73840fc65c227577f8bf9489"},"schema_version":"1.0"},"canonical_sha256":"002523c1facb675ee98a3373bb0e45cb04b57b0f5d939242c06de54f70e0ae5f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:02.610501Z","signature_b64":"TPk4YG+t8GwWJfV73f4Cm9L5UkN9pPmQn2dqPzVmXx48W+N+s3Tgh3BTStamVoURUNZStebbVi8Dwipsq3/5Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"002523c1facb675ee98a3373bb0e45cb04b57b0f5d939242c06de54f70e0ae5f","last_reissued_at":"2026-05-18T01:25:02.609968Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:02.609968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1411.6659","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":"2026-05-18T01:25:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GgpWiUSo6GaoP6stZMoDYJ4edD6NtD3M/bSv3tjcW4hc4MYpTSCEdcEsU5HYfxe81uZXMV5jJ6oTiDT56hqfBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T17:33:24.536692Z"},"content_sha256":"03fda6cd45a121571b35b0aadbb5032b3e524b9c9cd3672b0455a323c6560a09","schema_version":"1.0","event_id":"sha256:03fda6cd45a121571b35b0aadbb5032b3e524b9c9cd3672b0455a323c6560a09"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:AASSHQP2ZNTV52MKGNZ3WDSFZM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Plasma cleaning of ITER first mirrors in magnetic field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.plasm-ph"],"primary_cat":"physics.ins-det","authors_text":"Ernst Meyer, Frank Leipold, Laurent Marot, Lucas Moser, Roger Reichle, Roland Steiner","submitted_at":"2014-11-24T21:37:43Z","abstract_excerpt":"To avoid reflectivity losses in ITER optical diagnostic systems, plasma sputtering of metallic First Mirrors is foreseen in order to remove deposits coming from the main wall (mainly beryllium and tungsten). Therefore plasma cleaning has to work on large mirrors (up to a size of 200*300 mm) and under the influence of strong magnetic fields (several Tesla). This work presents the results of plasma cleaning of aluminium and aluminium oxide (used as beryllium proxy) deposited on molybdenum mirrors. Using radio frequency (13.56 MHz) argon plasma, the removal of a 260 nm mixed aluminium/aluminium o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.6659","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":"2026-05-18T01:25:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KXh0zYm6VA9ZeohTVm8ZMSiaPKfvL4+jmhXZX2YXrN+eaXH7zpDbMdJfCRrIW88anIjyc/LoUbQyaB3vjOR7Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T17:33:24.537409Z"},"content_sha256":"1fd6cb3ee3d1432187e2b466f49dc36c2f384168138e613563ffe5a36592d36f","schema_version":"1.0","event_id":"sha256:1fd6cb3ee3d1432187e2b466f49dc36c2f384168138e613563ffe5a36592d36f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AASSHQP2ZNTV52MKGNZ3WDSFZM/bundle.json","state_url":"https://pith.science/pith/AASSHQP2ZNTV52MKGNZ3WDSFZM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AASSHQP2ZNTV52MKGNZ3WDSFZM/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":"2026-05-22T17:33:24Z","links":{"resolver":"https://pith.science/pith/AASSHQP2ZNTV52MKGNZ3WDSFZM","bundle":"https://pith.science/pith/AASSHQP2ZNTV52MKGNZ3WDSFZM/bundle.json","state":"https://pith.science/pith/AASSHQP2ZNTV52MKGNZ3WDSFZM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AASSHQP2ZNTV52MKGNZ3WDSFZM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:AASSHQP2ZNTV52MKGNZ3WDSFZM","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":"5d7f3f325cfb107392c1032eb5586ecd59573dfc73840fc65c227577f8bf9489","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-24T21:37:43Z","title_canon_sha256":"074b039f4461e41d8d001737a583990112ebe5adc3fac3455d05163c7203c540"},"schema_version":"1.0","source":{"id":"1411.6659","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.6659","created_at":"2026-05-18T01:25:02Z"},{"alias_kind":"arxiv_version","alias_value":"1411.6659v1","created_at":"2026-05-18T01:25:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.6659","created_at":"2026-05-18T01:25:02Z"},{"alias_kind":"pith_short_12","alias_value":"AASSHQP2ZNTV","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"AASSHQP2ZNTV52MK","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"AASSHQP2","created_at":"2026-05-18T12:28:19Z"}],"graph_snapshots":[{"event_id":"sha256:1fd6cb3ee3d1432187e2b466f49dc36c2f384168138e613563ffe5a36592d36f","target":"graph","created_at":"2026-05-18T01:25:02Z","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":"To avoid reflectivity losses in ITER optical diagnostic systems, plasma sputtering of metallic First Mirrors is foreseen in order to remove deposits coming from the main wall (mainly beryllium and tungsten). Therefore plasma cleaning has to work on large mirrors (up to a size of 200*300 mm) and under the influence of strong magnetic fields (several Tesla). This work presents the results of plasma cleaning of aluminium and aluminium oxide (used as beryllium proxy) deposited on molybdenum mirrors. Using radio frequency (13.56 MHz) argon plasma, the removal of a 260 nm mixed aluminium/aluminium o","authors_text":"Ernst Meyer, Frank Leipold, Laurent Marot, Lucas Moser, Roger Reichle, Roland Steiner","cross_cats":["physics.plasm-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-24T21:37:43Z","title":"Plasma cleaning of ITER first mirrors in magnetic field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.6659","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":"sha256:03fda6cd45a121571b35b0aadbb5032b3e524b9c9cd3672b0455a323c6560a09","target":"record","created_at":"2026-05-18T01:25:02Z","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":"5d7f3f325cfb107392c1032eb5586ecd59573dfc73840fc65c227577f8bf9489","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-11-24T21:37:43Z","title_canon_sha256":"074b039f4461e41d8d001737a583990112ebe5adc3fac3455d05163c7203c540"},"schema_version":"1.0","source":{"id":"1411.6659","kind":"arxiv","version":1}},"canonical_sha256":"002523c1facb675ee98a3373bb0e45cb04b57b0f5d939242c06de54f70e0ae5f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"002523c1facb675ee98a3373bb0e45cb04b57b0f5d939242c06de54f70e0ae5f","first_computed_at":"2026-05-18T01:25:02.609968Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:02.609968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TPk4YG+t8GwWJfV73f4Cm9L5UkN9pPmQn2dqPzVmXx48W+N+s3Tgh3BTStamVoURUNZStebbVi8Dwipsq3/5Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:02.610501Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.6659","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:03fda6cd45a121571b35b0aadbb5032b3e524b9c9cd3672b0455a323c6560a09","sha256:1fd6cb3ee3d1432187e2b466f49dc36c2f384168138e613563ffe5a36592d36f"],"state_sha256":"9dff7443450996e596c5410ba9b202d583154c2de9afa3306fe4561e00cb22fd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ir6J/cH8sZ4xxWmCF4l1wslgA2dZ+A5lP6y0w4BHPYGYCgX4RsFfSuSIaZ2uaLgKY4SCHuuSq8WWrw7PzTM0Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T17:33:24.540782Z","bundle_sha256":"91e897ce69fd23d5964e666cd391abadb42e57d52d035fd196a9971b0e5a0582"}}