Pith Number

pith:IPKQYSTP

pith:2026:IPKQYSTPZJQP6MJQRGJFS722XC

not attested not anchored not stored refs pending

Systematic Investigation of Acceptor Removal in HPK LGADs with Modified Gain Layers

Issei Horikoshi, Koji Nakamura, Koji Sato, Mahiro Kobayashi, Masato Terada, Minoru Hirose, Sayuka Kita, Tatsuya Masubuchi, Tomoka Imamura, Yua Murayama

Carbon implantation is the only gain-layer modification that improves LGAD radiation tolerance among those tested.

arxiv:2604.23956 v2 · 2026-04-27 · physics.ins-det · hep-ex

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\usepackage{pith}
\pithnumber{IPKQYSTPZJQP6MJQRGJFS722XC}

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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

The results show that carbon implantation is the only approach among those studied here that provides a clear improvement in radiation tolerance. In contrast, neither oxygen-related modification, including the Partially Activated Boron (PAB) approach, nor gain-layer compensation alone yields a significant improvement, and the compensated carbon-implanted structure shows no clear advantage over the carbon-only case. In addition, the acceptor-removal coefficient is found to depend on the irradiation particle type and energy.

C2weakest assumption

That differences in measured acceptor-removal coefficients and post-irradiation operating voltages are caused primarily by the gain-layer modifications rather than by uncontrolled variations in fabrication processes, irradiation conditions, or measurement setups across the HPK prototypes.

C3one line summary

Carbon implantation in the gain layer of HPK LGADs provides a clear improvement in radiation tolerance after proton and neutron irradiation, unlike oxygen-related modifications or boron-phosphorus compensation.

Receipt and verification

First computed	2026-06-23T02:13:24.412333Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43d50c4a6fca60ff31308992597f5ab898dd181f3bbc91c1d7af2320ee052bdf

Aliases

arxiv: 2604.23956 · arxiv_version: 2604.23956v2 · doi: 10.48550/arxiv.2604.23956 · pith_short_12: IPKQYSTPZJQP · pith_short_16: IPKQYSTPZJQP6MJQ · pith_short_8: IPKQYSTP

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/IPKQYSTPZJQP6MJQRGJFS722XC \
  | 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: 43d50c4a6fca60ff31308992597f5ab898dd181f3bbc91c1d7af2320ee052bdf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ae9a1c89894c6ddc3b2bcf35ca99037b289ef2affe6320f54716650c36d5d8b",
    "cross_cats_sorted": [
      "hep-ex"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "physics.ins-det",
    "submitted_at": "2026-04-27T02:00:42Z",
    "title_canon_sha256": "c52ac3e8b4de41cadbc2610d30eb6e200f5b004ac84a3453c730adaf77ad1157"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.23956",
    "kind": "arxiv",
    "version": 2
  }
}