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<p>Ideal collector materials require low secondary electron yield (SEY δ), high thermal conductivity (TC), and other comprehensive properties. In this study, we propose a novel strategy utilizing boron-doped graphite/copper (Gr/Cu) composites as collector materials. The effects of B content (0–2.0 wt.%) and graphite content on the TC and δ of the Gr/Cu composites are systematically investigated. Subsequently we compute the work function of the composites surface using simulations to further elucidate the underlying mechanism of the effect of B. The results demonstrate that the TC of the 40 vol.% Gr/Cu composites are significantly enhanced by 73% at a 0.5 wt.% content of B, while the δ<sub>max</sub> rises by only 0.3. Through optimization experiments, 89 vol.% Gr/Cu-0.5B composites are successfully fabricated, achieving a remarkably low δ<sub>max</sub> of 0.85 and the TC of 188.5 W⋅m<sup>−1</sup>⋅K<sup>−1</sup>. Composites with higher TC and lower δ are expected to be a better choice for collector materials.</p>

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A graphite/copper composite with high thermal conductivity and low secondary electron yield for collector applications

  • 期刊论文

  • 发表日期：

    2025年6月11日

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  • Huihong Huang,
  • Wulin Yang,
  • Jiajun Zhu,
  • Licai Fu,
  • Lingping Zhou

摘要

Ideal collector materials require low secondary electron yield (SEY δ), high thermal conductivity (TC), and other comprehensive properties. In this study, we propose a novel strategy utilizing boron-doped graphite/copper (Gr/Cu) composites as collector materials. The effects of B content (0–2.0 wt.%) and graphite content on the TC and δ of the Gr/Cu composites are systematically investigated. Subsequently we compute the work function of the composites surface using simulations to further elucidate the underlying mechanism of the effect of B. The results demonstrate that the TC of the 40 vol.% Gr/Cu composites are significantly enhanced by 73% at a 0.5 wt.% content of B, while the δmax rises by only 0.3. Through optimization experiments, 89 vol.% Gr/Cu-0.5B composites are successfully fabricated, achieving a remarkably low δmax of 0.85 and the TC of 188.5 W⋅m−1⋅K−1. Composites with higher TC and lower δ are expected to be a better choice for collector materials.