{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:W3AV56W7AM5SG2BWQYIWLSVQ7U","short_pith_number":"pith:W3AV56W7","canonical_record":{"source":{"id":"1809.06927","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-09-18T20:46:28Z","cross_cats_sorted":[],"title_canon_sha256":"7d6623120966159dfdd3247eb6e183be5ab2529b43763ea8779cd7ab365a43cd","abstract_canon_sha256":"753ccdb0c175448429f4e4aa0987cb9341ba44a369831f32c9c28fdb5d2bfb87"},"schema_version":"1.0"},"canonical_sha256":"b6c15efadf033b236836861165cab0fd02c174dbf4a9a7c26280760128a941fd","source":{"kind":"arxiv","id":"1809.06927","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.06927","created_at":"2026-05-18T00:05:21Z"},{"alias_kind":"arxiv_version","alias_value":"1809.06927v1","created_at":"2026-05-18T00:05:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.06927","created_at":"2026-05-18T00:05:21Z"},{"alias_kind":"pith_short_12","alias_value":"W3AV56W7AM5S","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"W3AV56W7AM5SG2BW","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"W3AV56W7","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:W3AV56W7AM5SG2BWQYIWLSVQ7U","target":"record","payload":{"canonical_record":{"source":{"id":"1809.06927","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-09-18T20:46:28Z","cross_cats_sorted":[],"title_canon_sha256":"7d6623120966159dfdd3247eb6e183be5ab2529b43763ea8779cd7ab365a43cd","abstract_canon_sha256":"753ccdb0c175448429f4e4aa0987cb9341ba44a369831f32c9c28fdb5d2bfb87"},"schema_version":"1.0"},"canonical_sha256":"b6c15efadf033b236836861165cab0fd02c174dbf4a9a7c26280760128a941fd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:21.132106Z","signature_b64":"PZDr+CNZMvDkHQ6qx3Pd9AfX3gRSJOap5x+86Qkawc3aCvU3Cu2FN893P5NI2ENphRtvpIIqwyYm2SnfTwH9BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b6c15efadf033b236836861165cab0fd02c174dbf4a9a7c26280760128a941fd","last_reissued_at":"2026-05-18T00:05:21.131509Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:21.131509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.06927","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":"2026-05-18T00:05:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hjsYcvgjTkwkJ2kwkGfMouNA4UValp+piEOH/ZQjcdZGffmOSCleDDzA74ok44y8EOjgFZfW5fbTERG9ixOhBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T06:34:12.361414Z"},"content_sha256":"d18a496586956370411228a271e0252c98bfe336336373ff9ba5dcf1ef957823","schema_version":"1.0","event_id":"sha256:d18a496586956370411228a271e0252c98bfe336336373ff9ba5dcf1ef957823"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:W3AV56W7AM5SG2BWQYIWLSVQ7U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Transverse Instabilities of a Bunch with Space Charge, Wake and Feedback","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"Alexey Burov","submitted_at":"2018-09-18T20:46:28Z","abstract_excerpt":"When a resistive feedback and single-bunch wake act together, it is known that some head-tail modes may become unstable even without space charge. This feedback-wake instability, FWI, modified by space charge to a certain degree, is shown to have a special single-maximum increasing- dropping pattern with respect to the gain. Also, at sufficiently large Coulomb and wake fields, as well as the feedback gain, a new type of transverse mode-coupling instability is shown to take place, 3FMCI, when head-to-tail amplified positive modes couple and the growth rate saturates with the gain."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.06927","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":"2026-05-18T00:05:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D1yzZ0pYsM4JVmZLJm+hcRaSJn3+Jlcq59LFHmZACNkw0uF8Ku/h7npoSx+8EFj1jHF0iA2c9OXNDUmmIz9sDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T06:34:12.361767Z"},"content_sha256":"e23643fe5ba6a7b3768fc0b136fc1f64349e7750085de65f15dda0de0edd292f","schema_version":"1.0","event_id":"sha256:e23643fe5ba6a7b3768fc0b136fc1f64349e7750085de65f15dda0de0edd292f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W3AV56W7AM5SG2BWQYIWLSVQ7U/bundle.json","state_url":"https://pith.science/pith/W3AV56W7AM5SG2BWQYIWLSVQ7U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W3AV56W7AM5SG2BWQYIWLSVQ7U/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":"2026-06-03T06:34:12Z","links":{"resolver":"https://pith.science/pith/W3AV56W7AM5SG2BWQYIWLSVQ7U","bundle":"https://pith.science/pith/W3AV56W7AM5SG2BWQYIWLSVQ7U/bundle.json","state":"https://pith.science/pith/W3AV56W7AM5SG2BWQYIWLSVQ7U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W3AV56W7AM5SG2BWQYIWLSVQ7U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:W3AV56W7AM5SG2BWQYIWLSVQ7U","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":"753ccdb0c175448429f4e4aa0987cb9341ba44a369831f32c9c28fdb5d2bfb87","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-09-18T20:46:28Z","title_canon_sha256":"7d6623120966159dfdd3247eb6e183be5ab2529b43763ea8779cd7ab365a43cd"},"schema_version":"1.0","source":{"id":"1809.06927","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.06927","created_at":"2026-05-18T00:05:21Z"},{"alias_kind":"arxiv_version","alias_value":"1809.06927v1","created_at":"2026-05-18T00:05:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.06927","created_at":"2026-05-18T00:05:21Z"},{"alias_kind":"pith_short_12","alias_value":"W3AV56W7AM5S","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"W3AV56W7AM5SG2BW","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"W3AV56W7","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:e23643fe5ba6a7b3768fc0b136fc1f64349e7750085de65f15dda0de0edd292f","target":"graph","created_at":"2026-05-18T00:05:21Z","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":"When a resistive feedback and single-bunch wake act together, it is known that some head-tail modes may become unstable even without space charge. This feedback-wake instability, FWI, modified by space charge to a certain degree, is shown to have a special single-maximum increasing- dropping pattern with respect to the gain. Also, at sufficiently large Coulomb and wake fields, as well as the feedback gain, a new type of transverse mode-coupling instability is shown to take place, 3FMCI, when head-to-tail amplified positive modes couple and the growth rate saturates with the gain.","authors_text":"Alexey Burov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-09-18T20:46:28Z","title":"Transverse Instabilities of a Bunch with Space Charge, Wake and Feedback"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.06927","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:d18a496586956370411228a271e0252c98bfe336336373ff9ba5dcf1ef957823","target":"record","created_at":"2026-05-18T00:05:21Z","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":"753ccdb0c175448429f4e4aa0987cb9341ba44a369831f32c9c28fdb5d2bfb87","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-09-18T20:46:28Z","title_canon_sha256":"7d6623120966159dfdd3247eb6e183be5ab2529b43763ea8779cd7ab365a43cd"},"schema_version":"1.0","source":{"id":"1809.06927","kind":"arxiv","version":1}},"canonical_sha256":"b6c15efadf033b236836861165cab0fd02c174dbf4a9a7c26280760128a941fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b6c15efadf033b236836861165cab0fd02c174dbf4a9a7c26280760128a941fd","first_computed_at":"2026-05-18T00:05:21.131509Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:21.131509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PZDr+CNZMvDkHQ6qx3Pd9AfX3gRSJOap5x+86Qkawc3aCvU3Cu2FN893P5NI2ENphRtvpIIqwyYm2SnfTwH9BA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:21.132106Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.06927","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d18a496586956370411228a271e0252c98bfe336336373ff9ba5dcf1ef957823","sha256:e23643fe5ba6a7b3768fc0b136fc1f64349e7750085de65f15dda0de0edd292f"],"state_sha256":"9b2cd86ae0aa28daa57b4698f762ab88ecb963d22fb2049f68de195b730fb8c6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cxFwCTmAzoQXvH2aM2zqBAq2bqIYASs/Lv6CBbNAQ0/j9GFu3/qE8NtZG7w3xRNArBkID9BfrXWjuZC53dRbDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T06:34:12.363947Z","bundle_sha256":"633ce4a1da34fa1dc212453be79e8db00eb448da58d5f21419b5f1e99fce2711"}}