TOF-MS(飞行时间质谱)会在离子通过加速电场时将其分离,并根据每个离子的质荷比测量其飞行时间的差异。由于必须以极高的精度发现飞行时间的微小差异,因此 TOF-MS 的探测器必须具有非常快的响应和非常低的时间抖动。
TOF-MS(飞行时间质谱)会根据每个离子的质荷比测量其飞行时间的差异。探测器时间响应特性在 TOF-MS 中尤其重要,因为探测器必须对飞行时间的微小差异或对由电场加速的离子到达某点的时刻进行准确测量。
在具有高分辨率的高性能质谱仪中,探测器必须具有亚纳秒响应时间 (半宽度)。我们能提供适用于各种类型 TOF-MS 的多种探测器产品阵容,包括高速亚纳秒级探测器,以及已针对紧凑型光谱仪进行优化且响应时间为几纳秒的较小探测器。
在质荷比相同的多个离子同时入射时,离子入射的探测器表面平整度是重要的因素。
平整的入射表面有助于最大限度减小离子到电子转换时序的差异,并且由此可以保留每个离子的可靠飞行时间数据。
响应波形可确定用于分析的测量数据是否易于处理和使用。
探测器:MCP 组件 MIGHTION
偏压:MCP:600 V,AD:-350 V
测量双极离子需要使用能浮动操作的探测器。具有高击穿电压的联轴器必须在高正负电压下用于浮动操作。
在定量分析中使用 TOF-MS 时,动态范围尤为重要。我们提供的探测器具有比以前提供的产品更宽的动态范围。
探测器:MCP 组件 MIGHTION
MCP 输入:-6 kV,50 欧姆终端
F14845-11:3.2 V 时的线性度为 90%
F14845-12:12 V 时的线性度为 90%
探测器 | 特点 | 详细参数 |
特性 | |||||
---|---|---|---|---|---|---|---|---|
产品信息 | 图像 | 型号 | 响应特性 (典型值) |
有效面积 (mm) |
浮动操作 | 动态范围 | 尺寸 | |
MCP 组件 | ![]() |
F9890-13 / -14 | 快速响应,标准型号 | 900 ps 至 1200 ps | Φ 27,Φ 42 | ― | 平均 | 平均 |
![]() |
F9890-31 / -32 | 快速响应,浮动 | 450 ps 至 700 ps | Φ 27,Φ 42 | ±10 kV | 平均 | 平均 | |
![]() |
F12334-11 | 紧凑 | 1500 ps | Φ 20,Φ 27,Φ 42 | ― | 平均 | 良好 | |
![]() |
F13446-11 | 紧凑,浮动 | 1300 ps 至 1500 ps | Φ 27,Φ 42 | ±5 kV | 平均 | 良好 | |
![]() |
MIGHTION F14845 系列 | 快速响应,宽动态范围 | 550 ps | Φ 27 | ― | 优秀 | 平均 |
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