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光子计数单元
C9744
光子计数单元旨在通过使用内置放大器和鉴别器电路，将光电倍增管中的单个光电子脉冲转换为 5 V 数字信号。可通过简单地将计数器连接到光子计数单元的输出，来执行具有高 S/N 比的光子计数。C9744 采用高速电子电路，可实现高达 107 s-1 的出色输出线性度测量。C9744 还配有预分频器（除以 10），无需高速计数器。
详细参数
| 参数 | 说明/值 | 单位 | |
|---|---|---|---|
| 输入阻抗 | 50 | Ω | |
| 鉴别级别（输入转换） | -0.4 至 -16 | mV | |
| 所需的 PMT 增益率 | 大约 3 × 106 | - | |
| 预分频器 | ÷1 / ÷10 | - | |
| 计数线性度 | ÷1 | 4 × 106 | s-1 |
| ÷10 | 1 × 107 | ||
| 脉冲对分辨率 | ÷1 | 25 | ns |
| ÷10 | 10 | ||
| 输出脉冲 | CMOS 5 V，正逻辑 | - | |
| 输出脉冲宽度 | ÷1 | 10 | ns |
| ÷10 | 取决于计数率 | - | |
| 电源电压 | +5.0 V ± 0.2 V，130 mA / -5.0 V ± 0.2 V，50 mA | - | |
| 连接器 | 输入 | BNC-R | - |
| 输出 | BNC-R | - | |
| 功率 | DIN（6 针）*1 | - | |
| 尺寸 (W × H × D) | 90 × 32 × 140（不包括橡胶支脚和突出部分） | mm | |
| 工作环境温度 | 0 至 +50 | ℃ | |
| 工作环境湿度 *2 | 80 以下 | % | |
| 储存温度 | -15 至 +60 | ℃ | |
| 储存湿度 *2 | 85 以下 | % | |
| 重量 | 大约 250 | g | |
*1 配套插头附带电缆 (1.5 m)。
*2 无冷凝
框图
外形尺寸图（单位：mm）
连接示例
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