{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:WRAPTMBUAQJK42QXMJLQ2K5ITN","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":"572c11abc4c92d0d11968d5b9e461a44479572251237d15e8494218bc35e2aff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-07-26T14:43:24Z","title_canon_sha256":"1020e1523f4402b92ca031facab21d01bf73e9a3ac846f912b1b21c36e99c33e"},"schema_version":"1.0","source":{"id":"1307.7049","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.7049","created_at":"2026-05-18T01:48:34Z"},{"alias_kind":"arxiv_version","alias_value":"1307.7049v1","created_at":"2026-05-18T01:48:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.7049","created_at":"2026-05-18T01:48:34Z"},{"alias_kind":"pith_short_12","alias_value":"WRAPTMBUAQJK","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"WRAPTMBUAQJK42QX","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"WRAPTMBU","created_at":"2026-05-18T12:28:04Z"}],"graph_snapshots":[{"event_id":"sha256:d21fd3f125c77182f20d9fc3c9baa5caf4e45bcac8797523373415f77242cc96","target":"graph","created_at":"2026-05-18T01:48:34Z","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 experimental demonstration of the feasibility of reaching temperatures below 1 mK using cryogen-free technology. Our prototype system comprises an adiabatic nuclear demagnetisation stage, based on hyperfine-enhanced nuclear magnetic cooling, integrated with a commercial cryogen-free dilution refrigerator and 8 T superconducting magnet. Thermometry was provided by a current-sensing noise thermometer. The minimum temperature achieved at the experimental platform was 600 {\\mu}K. The platform remained below 1 mK for over 24 hours, indicating a total residual heat-leak into the experiment","authors_text":"Andrew Casey, Anthony Matthews, Aya Shibahara, Graham Batey, John Saunders, Michael Cuthbert","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-07-26T14:43:24Z","title":"A microkelvin cryogen-free experimental platform with integrated noise thermometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.7049","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":"sha256:4201655a5772c3ab812d4487413f71322b525af70d9e421493af0644f2d00608","target":"record","created_at":"2026-05-18T01:48:34Z","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":"572c11abc4c92d0d11968d5b9e461a44479572251237d15e8494218bc35e2aff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-07-26T14:43:24Z","title_canon_sha256":"1020e1523f4402b92ca031facab21d01bf73e9a3ac846f912b1b21c36e99c33e"},"schema_version":"1.0","source":{"id":"1307.7049","kind":"arxiv","version":1}},"canonical_sha256":"b440f9b0340412ae6a1762570d2ba89b689d957045f63fe06e7116d571849f9c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b440f9b0340412ae6a1762570d2ba89b689d957045f63fe06e7116d571849f9c","first_computed_at":"2026-05-18T01:48:34.166625Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:34.166625Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b7Ps5zEySVYr+V3D8BP9Q2h5R7gRmlYWUV+Hag3Tzudlr9bvewEIZHZ8tFet8k82LosVfSHLBAyjS3Rlo1f2Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:34.167364Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.7049","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4201655a5772c3ab812d4487413f71322b525af70d9e421493af0644f2d00608","sha256:d21fd3f125c77182f20d9fc3c9baa5caf4e45bcac8797523373415f77242cc96"],"state_sha256":"a28c7a0e45fbde2097abb871cae67bd71fe504f04290db84147a7410446342d4"}