Unlock instant, AI-driven research and patent intelligence for your innovation.

ExB ion detector for high efficiency time-of-flight mass spectrometers

An ion detector and detector technology, applied in time-of-flight spectrometers, spectrometer detectors, mass spectrometers, etc., can solve problems such as providing limited efficiency and reducing detection efficiency.

Active Publication Date: 2006-09-06
EL MUL TECH
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As discussed above, for MCPs, MPCs offer only limited efficiency since 45% of the electrons reaching the MCP do not generate a signal
Also, each screen passed reduces detection efficiency by 10-20% and creates secondary particle background

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • ExB ion detector for high efficiency time-of-flight mass spectrometers
  • ExB ion detector for high efficiency time-of-flight mass spectrometers
  • ExB ion detector for high efficiency time-of-flight mass spectrometers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The detector used for TOFMS is shown in figure 1 , which comprises a planar conductive entry plate 3 comprising a first window with a first highly penetrable metal grid 4 . This permeable grid is aligned with the trajectory of the incident ions 1, wherein the entrance plate 3 is oriented such that it is perpendicular to the axis of the ion beam. Usually the mesh penetration can reach 90%. This grid 4 is at the same potential V1 as the travel tube (not shown) of the ions. The ion detector also includes a planar conductive conversion plate 6 , wherein the conversion plate 6 includes a conversion component 5 aligned with the highly permeable metal grid 4 . The planar conversion element 5 comprises a material with a high probability of electron radiation per impinging ion, eg CVD diamond or oxide or other materials known for their high secondary radiation coefficient. The metal grid 4 and the conversion part 5 face the area of ​​incident ions. The detection plate 6 and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An ion detector, comprising a planar entrance plate with an entrance window, which comprises a first mesh; a converter assembly comprising a planar converter plate and a converter member for providing electrons upon impact of ions, said converter member being supported by said converter plate; a planar exit plate, with an exit window; the planes of the above plates being parallel, the converter plate and the exit plate facing the entrance plate, the converter member being aligned with the entrance window, the other plates being biasable with respect to the entrance plate, to provide a homogeneous electric field between the converter plate and the exit plate, respectively and the entrance plate; the ion detector further comprising a magnet assembly for providing a magnetic field in the space between the plates that the electrons from the converter plate can pass through the exit window; towards a detection assembly.

Description

technical field [0001] The present invention relates to ExB ion detectors for high efficiency time-of-flight mass spectrometers. Background technique [0002] Time-of-flight mass spectrometry (TOFMS) is used to characterize the masses of very heavy molecular ions or molecular clusters with masses in the hundreds of thousands of atomic mass units. There are different methods (eg MALDI) capable of producing low charge high organic molecules or clusters. All these charged species are called ions. Typically, in time-of-flight mass spectrometers, very short (less than nanosecond) pulsed ion injections are typically accelerated to 2-30 kV and capable of flying in a straight line from one to several meters with electrostatic reflectors that increase the return path, To reduce the physical size of the device and sharpen the time distribution. [0003] The time for an ion to reach the end plate is directly related to its M / q (mass to charge state ratio). In a general application ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/02H01J49/00H01J49/10H01J49/40
CPCH01J49/025H01J49/40
Inventor 埃利·切菲兹阿明·舍恩
Owner EL MUL TECH