TOF-MS (Time-Of-Flight Mass Spectrometry) separates ions as they travel through an accelerating electric field and measures the difference in their time-of-flight according to the mass-to-charge ratio of each ion. Since slight differences in the time-of-flight must be found with extreme accuracy, the detectors for TOF-MS must have very fast response and low time jitter.
TOF-MS (Time-Of-Flight Mass Spectrometry) measures the difference in the time-of-flight of ions that occurs according to the mass-to-charge ratio of each ion. Detector time response characteristics are particularly important in TOF-MS because detectors must accurately measure the tiny differences in time-of-flight or the time at which ions being accelerated by an electric field reach a certain point.
In high-performance mass spectrometers with high resolution, the detectors must have a sub-nanosecond response time (FWHM). We offer a wide range of detector product lineups available for various types of TOF-MS, including high-speed sub-nanosecond detectors and smaller detectors with a response time of a few nanoseconds optimized for compact spectrometers.
The flatness of the detector surface on which ions are incident is an important factor when multiple ions of the same mass-to-charge ratio are incident at the same time.
The flat incident surface helps minimize the difference in ion-to-electron conversion timing and can in this way retain reliable time-of-flight data for each ion.
The response waveform determines whether measurement data for analysis is easy to process and use.
Detector: MCP assembly MIGHTION
Bias voltage: MCP: 600 V, AD: -350 V
Measuring bipolar ions requires detectors capable of floating operation. Couplings with a high breakdown voltage must be used for floating operation at high positive-and-negative voltages.
The dynamic range is particularly important when TOF-MS is used in quantitative analysis. We provide detectors with a wider dynamic range than previously available products.
Detector: MCP assembly MIGHTION
MCP-in: -6 kV, 50-ohm termination
F14845-11: Linearity 90 % at 3.2 V
F14845-12: Linearity 90 % at 12 V
|Floating operation||Dynamic range||Size|
|MCP assembly||F9890-13 / -14||Fast response, Standard model||900 ps to 1200 ps||Φ 27, Φ 42||―||Average||Average|
|F9890-31 / -32||Fast response, Floating||450 ps to 700 ps||Φ 27, Φ 42||±10 kV||Average||Average|
|F12334-11||Compact||1500 ps||Φ 20, Φ 27, Φ 42||―||Average||Good|
|F13446-11||Compact, Floating||1300 ps to 1500 ps||Φ 27, Φ 42||±5 kV||Average||Good|
|MIGHTION F14845 series||Fast response, Wide dynamic range||550 ps||Φ 27||―||Excellent||Average|
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