{"paper":{"title":"First Demonstration of the HeRALD Superfluid Helium Detector Concept","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.ins-det","authors_text":"A. Biekert, A. Dushkin, A. Serafin, A. Suzuki, B. Penning, B. Serfass, B. Suerfu, C.L. Chang, C.W. Fink, D.N. McKinsey, D.Z. Osterman, G.R.C Rischbieter, G. Wang, H.D. Pinckney, J. Lin, L. Chaplinsky, M. Garcia-Sciveres, M. Platt, M. Pyle, M. Reed, M.R. Williams, P.K. Patel, P. Sorensen, R. Anthony-Petersen, R.J. Smith, R.K. Romani, R. Mahapatra, S.A. Hertel, S.L. Watkins, V. Velan, W. Guo, W. Matava, X. Li, Y. Chang, Y. Qi, Y. Wang","submitted_at":"2023-07-21T19:33:58Z","abstract_excerpt":"The SPICE/HeRALD collaboration is performing R&D to enable studies of sub-GeV dark matter models using a variety of target materials. Here we report our recent progress on instrumenting a superfluid $^4$He target mass with a transition-edge sensor based calorimeter to detect both atomic signals (scintillation) and $^4$He quasiparticle (phonon and roton) excitations. The sensitivity of HeRALD to the critical \"quantum evaporation\" signal from $^4$He quasiparticles requires us to block the superfluid film flow to the calorimeter. We have developed a heat-free film-blocking method employing an uno"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.11877","kind":"arxiv","version":2},"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/2307.11877/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"}