一个新的中子飞行时间探测器用于在OMEGA上的DT冲击中进行产量和离子温度测量
A K Schwemmlein1, C J Forrest1, J P Knauer1
1Laboratory for Laser Energetics, 250 East River Rd., Rochester, New York 14623 USA.
The Review of scientific instruments
|September 12, 2025
概括
一个新的中子飞行时间 (nTOF) 探测器可以提高OMEGA激光系统上的三 (DT) 爆破的测量. 这种探测器减少了低模式不对称性和热点流量的不确定性,提高了核聚变研究的诊断精度.
科学领域:
- 核聚变诊断的核聚变诊断技术
- 等离子体物理仪器仪器仪表
- 惯性封闭融合是一种惯性封闭的融合.
背景情况:
- 精确测量三 (DT) 冲击对于惯性封闭聚变 (ICF) 研究至关重要.
- 低模式不对称性和热点流动动力学显著影响核聚变产量.
- 在OMEGA激光系统上现有的中子飞行时间 (nTOF) 探测器在某些测量区域具有局限性.
研究的目的:
- 在OMEGA激光系统上设计,安装和校准一个新的nTOF探测器.
- 为了提高DT产量和离子温度测量的精度.
- 为了减少低模式不对称性和热点流量测量的不确定性.
主要方法:
- 设计并安装了一个"仅PMT"的nTOF探测器 (H2 nTOF) 使用Photek PMT-110.
- 将探测器放置在一个以前没有人居住的区域 (θ = 46.8°,φ = 84.9°),距离目标室中心9.3米.
- 校准了探测器的DT产量 (1×10^13到3×10^14) 和离子温度 (2到12 keV).
主要成果:
- 该H2 nTOF探测器成功测量了在指定范围内的DT产量和离子温度.
- 在z方向上减少热点流动不确定性,从±10到±8公里/秒.
- 在异性流动轴的不确定性显著降低 (σθ从±26°到±13°,σφ从±25°到±21°).
结论:
- 新的H2 nTOF探测器有效地提高了OMEGA激光系统的诊断能力.
- 探测器的设计和放置有助于减少关键爆破参数的不确定性.
- 这一进步有助于更精确地描述用于核聚变能源开发的DT爆炸.
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