Pith Number

pith:U2H5OUV3

pith:2026:U2H5OUV3VJ632JTJJ34H2ZMKMB

not attested not anchored not stored refs pending

Nitrogen-induced ELM suppression and confinement improvement in the EAST tokamak with a full metal wall

Chu Zhou, Ge Zhuang, Gongshun Li, Hailin Zhao, Jingyan Hu, Jinyue Liu, Kangning Geng, Kedong Li, Peng Shi, Xiang Jian, Yiren Zhu

Nitrogen seeding achieves ELM-free H-mode in EAST with improved confinement by driving a dissipative trapped electron mode at the pedestal foot that regulates edge gradients and avoids the peeling-ballooning limit.

arxiv:2604.26403 v2 · 2026-04-29 · physics.plasm-ph

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\usepackage{pith}
\pithnumber{U2H5OUV3VJ632JTJJ34H2ZMKMB}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Following N2 injection, large ELM bursts are completely suppressed, while global energy confinement is significantly enhanced, with the H98 factor increasing from approximately 0.9 to 1.2. ... The energy and particle transport driven by this pedestal-foot DTEM effectively regulates the edge gradients, preventing the pedestal from crossing the Peeling-Ballooning stability boundary and sustaining a stationary ELM-free state.

C2weakest assumption

That the observed edge coherent mode (20-50 kHz, k_theta ~0.54 cm^-1 at psi_N ~0.99) is a dissipative trapped electron mode whose transport quantitatively prevents the pedestal from crossing the peeling-ballooning boundary, as inferred from linear CGYRO simulations matching experimental diagnostics.

C3one line summary

Receipt and verification

First computed	2026-05-28T01:04:40.989890Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a68fd752bbaa7dbd26694ef87d658a60530103beac3c690481a1d8605c5dc021

Aliases

arxiv: 2604.26403 · arxiv_version: 2604.26403v2 · doi: 10.48550/arxiv.2604.26403 · pith_short_12: U2H5OUV3VJ63 · pith_short_16: U2H5OUV3VJ632JTJ · pith_short_8: U2H5OUV3

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/U2H5OUV3VJ632JTJJ34H2ZMKMB \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a68fd752bbaa7dbd26694ef87d658a60530103beac3c690481a1d8605c5dc021

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8978d74d3e7b059117348b5e8a732a78fb46b62cbe5d7e54b0427c987088851f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.plasm-ph",
    "submitted_at": "2026-04-29T08:12:51Z",
    "title_canon_sha256": "61192d2a57ed2d4f7bcd20be43e2e1963a18b1c81de92f0749e1cf0837853b05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.26403",
    "kind": "arxiv",
    "version": 2
  }
}