{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:IMVOKXJBLTLV3MNQX3YCNQW2O7","short_pith_number":"pith:IMVOKXJB","canonical_record":{"source":{"id":"1809.00525","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-03T10:06:14Z","cross_cats_sorted":[],"title_canon_sha256":"6cccc721573a4976256a17b911d4e108f839b3b9ff8ad4d2b9644b00ae1f3c10","abstract_canon_sha256":"247ed3cb6ee0638ff47456fb017263b239f301eaf39311b054bad92ede190064"},"schema_version":"1.0"},"canonical_sha256":"432ae55d215cd75db1b0bef026c2da77d1292af0dcd30fd04a29438c4da18d2d","source":{"kind":"arxiv","id":"1809.00525","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.00525","created_at":"2026-05-18T00:06:33Z"},{"alias_kind":"arxiv_version","alias_value":"1809.00525v1","created_at":"2026-05-18T00:06:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.00525","created_at":"2026-05-18T00:06:33Z"},{"alias_kind":"pith_short_12","alias_value":"IMVOKXJBLTLV","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"IMVOKXJBLTLV3MNQ","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"IMVOKXJB","created_at":"2026-05-18T12:32:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:IMVOKXJBLTLV3MNQX3YCNQW2O7","target":"record","payload":{"canonical_record":{"source":{"id":"1809.00525","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-03T10:06:14Z","cross_cats_sorted":[],"title_canon_sha256":"6cccc721573a4976256a17b911d4e108f839b3b9ff8ad4d2b9644b00ae1f3c10","abstract_canon_sha256":"247ed3cb6ee0638ff47456fb017263b239f301eaf39311b054bad92ede190064"},"schema_version":"1.0"},"canonical_sha256":"432ae55d215cd75db1b0bef026c2da77d1292af0dcd30fd04a29438c4da18d2d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:33.350730Z","signature_b64":"fY/Y0hqRSQdFaCXBE0InBykkXEDALFpilpC8hnVNC/tHyZafirTucwVNkTrWbFq9PVlNZPtzZBtFy8FcQmXACg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"432ae55d215cd75db1b0bef026c2da77d1292af0dcd30fd04a29438c4da18d2d","last_reissued_at":"2026-05-18T00:06:33.350099Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:33.350099Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.00525","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":"2026-05-18T00:06:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HiqHSf5UsNFFO6PX1qcpsonWit2PSGFCvvjdKVzZIsCKvgJ9hEU7HJMattPUdkZT4zXAc4Ur/a3mu4WI/AtSBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T09:11:38.300421Z"},"content_sha256":"201ea07c2dd08bab7d2f441c85adc93de063270d5a9091b47851e352d8cbeefa","schema_version":"1.0","event_id":"sha256:201ea07c2dd08bab7d2f441c85adc93de063270d5a9091b47851e352d8cbeefa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:IMVOKXJBLTLV3MNQX3YCNQW2O7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Impurity in low energy Ar+ ion beam is the cause of pattern formation on Si","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Dipak Bhowmik, Manabendra Mukherjee, Prasanta Karmakar","submitted_at":"2018-09-03T10:06:14Z","abstract_excerpt":"We report the decisive role of reactive ion impurities in low energy Ar+ ion beam on surface nanopattern formation. The source of experimental inconsistency in pattern formation by low energy (few keV to 10's of KeV) Ar+ ion beam has been identified by irradiating Si surface at an oblique angle with pure and impure Ar+ ion beam of energy 3-10 keV. No well-defined patterns are observed for mass selected pure Ar+ ion bombardment, whereas well defined periodic ripple pattern is formed by the same experimental condition with impure mass unanalyzed Ar+ ion irradiation. The contaminants in mass unan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.00525","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":"2026-05-18T00:06:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RfwnGkrHaMaqSXjJMI2s68ctX2WFRPkT9AFrOh6nbnuilZQ41MRG1WbRwvaAWR/a/Wl7BY02fZWR1khwy4/7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T09:11:38.300766Z"},"content_sha256":"7d8227faeeb1fb2ce8f47b3b9c2a8afc7214612c6b6dac1c1cc928316231b90c","schema_version":"1.0","event_id":"sha256:7d8227faeeb1fb2ce8f47b3b9c2a8afc7214612c6b6dac1c1cc928316231b90c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IMVOKXJBLTLV3MNQX3YCNQW2O7/bundle.json","state_url":"https://pith.science/pith/IMVOKXJBLTLV3MNQX3YCNQW2O7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IMVOKXJBLTLV3MNQX3YCNQW2O7/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":"2026-06-26T09:11:38Z","links":{"resolver":"https://pith.science/pith/IMVOKXJBLTLV3MNQX3YCNQW2O7","bundle":"https://pith.science/pith/IMVOKXJBLTLV3MNQX3YCNQW2O7/bundle.json","state":"https://pith.science/pith/IMVOKXJBLTLV3MNQX3YCNQW2O7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IMVOKXJBLTLV3MNQX3YCNQW2O7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:IMVOKXJBLTLV3MNQX3YCNQW2O7","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":"247ed3cb6ee0638ff47456fb017263b239f301eaf39311b054bad92ede190064","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-03T10:06:14Z","title_canon_sha256":"6cccc721573a4976256a17b911d4e108f839b3b9ff8ad4d2b9644b00ae1f3c10"},"schema_version":"1.0","source":{"id":"1809.00525","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.00525","created_at":"2026-05-18T00:06:33Z"},{"alias_kind":"arxiv_version","alias_value":"1809.00525v1","created_at":"2026-05-18T00:06:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.00525","created_at":"2026-05-18T00:06:33Z"},{"alias_kind":"pith_short_12","alias_value":"IMVOKXJBLTLV","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"IMVOKXJBLTLV3MNQ","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"IMVOKXJB","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:7d8227faeeb1fb2ce8f47b3b9c2a8afc7214612c6b6dac1c1cc928316231b90c","target":"graph","created_at":"2026-05-18T00:06:33Z","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 report the decisive role of reactive ion impurities in low energy Ar+ ion beam on surface nanopattern formation. The source of experimental inconsistency in pattern formation by low energy (few keV to 10's of KeV) Ar+ ion beam has been identified by irradiating Si surface at an oblique angle with pure and impure Ar+ ion beam of energy 3-10 keV. No well-defined patterns are observed for mass selected pure Ar+ ion bombardment, whereas well defined periodic ripple pattern is formed by the same experimental condition with impure mass unanalyzed Ar+ ion irradiation. The contaminants in mass unan","authors_text":"Dipak Bhowmik, Manabendra Mukherjee, Prasanta Karmakar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-03T10:06:14Z","title":"Impurity in low energy Ar+ ion beam is the cause of pattern formation on Si"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.00525","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":"sha256:201ea07c2dd08bab7d2f441c85adc93de063270d5a9091b47851e352d8cbeefa","target":"record","created_at":"2026-05-18T00:06:33Z","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":"247ed3cb6ee0638ff47456fb017263b239f301eaf39311b054bad92ede190064","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-03T10:06:14Z","title_canon_sha256":"6cccc721573a4976256a17b911d4e108f839b3b9ff8ad4d2b9644b00ae1f3c10"},"schema_version":"1.0","source":{"id":"1809.00525","kind":"arxiv","version":1}},"canonical_sha256":"432ae55d215cd75db1b0bef026c2da77d1292af0dcd30fd04a29438c4da18d2d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"432ae55d215cd75db1b0bef026c2da77d1292af0dcd30fd04a29438c4da18d2d","first_computed_at":"2026-05-18T00:06:33.350099Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:33.350099Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fY/Y0hqRSQdFaCXBE0InBykkXEDALFpilpC8hnVNC/tHyZafirTucwVNkTrWbFq9PVlNZPtzZBtFy8FcQmXACg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:33.350730Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.00525","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:201ea07c2dd08bab7d2f441c85adc93de063270d5a9091b47851e352d8cbeefa","sha256:7d8227faeeb1fb2ce8f47b3b9c2a8afc7214612c6b6dac1c1cc928316231b90c"],"state_sha256":"02bd80278daeaadf125639b9c5f6d31c9a24ac17dc4ff3975fb0fda1e296713d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pIaQGD1D9HHH3/HMwWjhDt0JpUe1627K6tR7ufAtrhKyGwQ2vannJu0YKHW8LGzxvmhWo4RAV1CMq/qHMnEwBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T09:11:38.302679Z","bundle_sha256":"e83361bda659bea39e19659b8957603cb35ee23c0ab6d48048d0476b297447d1"}}