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We demonstrate analytically and numerically","authors_text":"Brian Marre, David Blaschke, Filip Opto{\\l}owicz, Klaus Steiniger, Michael Bussmann","cross_cats":["physics.comp-ph"],"headline":"Charge-separation fronts in laser-driven cryogenic hydrogen form non-quasi-neutral double layers that dominate fast-ion acceleration.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-05-15T17:23:37Z","title":"Kinetic Simulations of Laser-Driven Compression and Heating of Magnetised Cryogenic Hydrogen Targets using PIConGPU"},"references":{"count":16,"internal_anchors":0,"resolved_work":16,"sample":[{"cited_arxiv_id":"","doi":"10.1088/1742-6596/874/1/012028","is_internal_anchor":false,"ref_index":1,"title":"First results with the novel petawatt laser acceleration facility in Dresden.Journal of Physics: Conference Series2017,874, 012028","work_id":"2afc5822-76ae-4a19-82cd-24490ebd7197","year":null},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":2,"title":"Single-event neutron time-of-flight spectroscopy with a petawatt-laser-driven neutron source, 2025, [arXiv:nucl-ex/2506.20026]","work_id":"20659baf-061b-497b-8506-21df98992f29","year":2025},{"cited_arxiv_id":"","doi":"10.3390/instruments5040038","is_internal_anchor":false,"ref_index":3,"title":"Towards High-Repetition-Rate Fast Neutron Sources Using Novel Enabling Technologies.Instruments2021,5","work_id":"451e1c72-4ea2-493a-b9c7-b7eb6f69019e","year":null},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":4,"title":"Scaling of thin wire cylindrical compression after 100 fs Joule surface heating with material, diameter and laser energy, 2025, [arXiv:physics.plasm-ph/2507.12109]","work_id":"464afa9e-81fa-4d95-98b9-a3c222b2ca08","year":2025},{"cited_arxiv_id":"","doi":"10.1017/hpl.2018.59","is_internal_anchor":false,"ref_index":5,"title":"Performance demonstration of the PEnELOPE main amplifier HEPA I using broadband nanosecond pulses.High Power Laser Science and Engineering2019,7, e1","work_id":"477af508-e30d-4dba-8c18-2d3e226006b3","year":2018}],"snapshot_sha256":"2dd6526aa805ad8e00f6a645b382b07d3069c1afd140aadac7d357e4910acd89"},"source":{"id":"2605.16206","kind":"arxiv","version":1},"verdict":{"created_at":"2026-05-19T18:30:53.598874Z","id":"8e40e596-eeab-46dd-bcf6-ae9bc1d9b720","model_set":{"reader":"grok-4.3"},"one_line_summary":"Kinetic PIC simulations identify a non-quasi-neutral charge-separation double layer as the dominant ion acceleration mechanism in laser-driven cryogenic hydrogen targets, which is suppressed by kT-scale axial magnetic fields that also extend compression time.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Charge-separation fronts in laser-driven cryogenic hydrogen form non-quasi-neutral double layers that dominate fast-ion acceleration.","strongest_claim":"We demonstrate analytically and numerically that the charge-separation front (v_hb) is an intrinsically non-quasi-neutral electrostatic double layer that lies outside the closure assumptions of radiation-hydrodynamic models. A simple 2v_hb reflection scaling ... establishing this non-thermal mechanism as the dominant acceleration pathway.","weakest_assumption":"The 2D3V PIConGPU simulations with the chosen resolution and three-beam setup accurately capture the physical charge-separation fields and ion bifurcation without significant numerical artifacts or missing three-dimensional effects in the cylindrical geometry."}},"verdict_id":"8e40e596-eeab-46dd-bcf6-ae9bc1d9b720"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:6c6719b686c9e7f09e9b7c53658036f9207860d2afa54286de7004d89cc7558b","target":"record","created_at":"2026-05-20T00:01:58Z","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":"c11329467dac5fc4f6a47f3b40c2abc4b3623b45ec86ddbc377c4f545ad144b5","cross_cats_sorted":["physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-05-15T17:23:37Z","title_canon_sha256":"56763ade0b96b1dc8983408e82c5a739e85b5a00a79cdddcfc2728244be20781"},"schema_version":"1.0","source":{"id":"2605.16206","kind":"arxiv","version":1}},"canonical_sha256":"34597e69c0fc2101fc158a35f54a41404f3dd1051a10908f6f386e47697ba76a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"34597e69c0fc2101fc158a35f54a41404f3dd1051a10908f6f386e47697ba76a","first_computed_at":"2026-05-20T00:01:58.010495Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T00:01:58.010495Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"unyk9qk1kYMF7CUsMXRY+INWUQd3LzxpHEyWIJjDVQ6VUo2dmY5Ek232pY+tEJ01a5wo7VzDJrsdDOnZaAprDw==","signature_status":"signed_v1","signed_at":"2026-05-20T00:01:58.011208Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.16206","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4e5457907e0354b8be607cefcec023e4b62a38fc16f73238f3831dc981b3ce52","sha256:6c6719b686c9e7f09e9b7c53658036f9207860d2afa54286de7004d89cc7558b","sha256:af75438a534ffda7bae41eaeb79e0251a44b0924e4b8d80fd840a9eccaef8850"],"state_sha256":"6a5058241b18d84ab52c86b6432a365e249a43a389c9c0e668e091f6836e9ec4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ffcifTCq/TmsGb6GScN7qAL52Msvj9TPlck+Ncq2OnvR7GKtWHfw1KLPFUCxVATpa54EyDun55Lr1uBS9OdqBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T08:14:53.217917Z","bundle_sha256":"7f897ac101796f30eb6ed62604258a6087e8859b03dbefa82b1ec774c6401cee"}}