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光子计数头
H11870-09
H11870 系列是一款宽受光面光子计数头设备，包含一个直径为 25 mm (1") 的端窗型光电倍增管，以及一个高压电源电路和光子计数电路。光电倍增管的高压电源和鉴别级别已按最佳值预设，只需连接 +5 V 电源即可进行光子计数测量。H11870 系列具有入射光过多检测输出功能（指示入射光过多的操作条件）。
提供安装法兰 (E6264) 选件，以便于安装到测量设备。
详细参数
| 光阴极面区域形状 | 圆形 |
|---|---|
| 光阴极面区域尺寸 | 21 mm 直径 |
| 波长（短） | 185 nm |
| 波长（长） | 320 nm |
| 波长（峰值） | 240 nm |
| 尺寸 (W x H x D) | 直径 34.0 mm x 114 mm |
| 输入电压 | 5 V |
| 最大值 输入电压 | 6 V |
| 最大值 输入电流 | 100 mA |
| 200 nm 处的计数灵敏度典型值 | 3.0 x 104 s-1・pW-1 |
| 300 nm 处的计数灵敏度典型值 | 1.2 x 104 s-1・pW-1 |
| 400 nm 处的计数灵敏度典型值 | 8.0 x 100 s-1・pW-1 |
| 计数线性度 | 6.0 x 106 s-1 |
| 暗计数典型值 | 15 s-1 |
| 暗计数最大值 | 30 s-1 |
| 脉冲对分辨率 | 18 ns |
| 输出脉冲宽度 | 9 ns |
| 输出脉冲高度最小值 | +2 V（负载电阻 50 Ω） +4 V（未端接） |
| 输出脉冲高度典型值 | +2.2 V（负载电阻 50 Ω） +4.4 V（未端接） |
| 建议的负载电阻 | 50 Ω |
| 信号输出逻辑 | 正逻辑 |
| 工作环境温度 | +5°C 至 +40°C |
| 储存温度 | -20°C 至 +50°C |
| 重量 | 126 g |
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