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光子计数头
H7828
H7828 系列是一款光子计数头设备，包含一个直径为 19 mm（3/4 英寸）的端窗型光电倍增管，以及一个高速光子计数电路和一个高压电源电路。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。尽管小型化，但有效光敏区直径高达 15 mm，因此可以非常有效地收集入射光。与其他 PMT 模块相比，H7828 系列具有更高的抗振动和抗冲击性能，因此适合用于便携式或移动测量设备。
详细参数
| 光阴极面区域形状 | 圆形 |
|---|---|
| 光阴极面区域尺寸 | 15 mm 直径 |
| 波长（短） | 300 nm |
| 波长（长） | 650 nm |
| 波长（峰值） | 420 nm |
| 尺寸 (W x H x D) | 26.0 x 50.0 x 56.0 mm |
| 输入电压 | +4.5 至 +5.5 V |
| 最大值 输入电压 | 6 V |
| 最大值 输入电流 | 60 mA |
| 300 nm 处的计数灵敏度典型值 | 2.1 x 105 s-1・pW-1 |
| 400 nm 处的计数灵敏度典型值 | 3.6 x 105 s-1・pW-1 |
| 500 nm 处的计数灵敏度典型值 | 2.8 x 105 s-1・pW-1 |
| 600 nm 处的计数灵敏度典型值 | 5.0 x 104 s-1・pW-1 |
| 计数线性度 | 1.5 x 106 s-1 |
| 暗计数典型值 | 200 s-1 |
| 暗计数最大值 | 500 s-1 |
| 脉冲对分辨率 | 70 ns |
| 输出脉冲宽度 | 30 ns |
| 输出脉冲高度最小值 | 3 V |
| 输出脉冲高度典型值 | 3.5 V |
| 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 至 +40 °C |
| 储存温度 | -20 至 +50 °C |
| 重量 | 70 g |
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