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Mass Analyzers: Common Types01:19

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
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The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.
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Related Experiment Video

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Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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TrapREMI: A reaction microscope inside an electrostatic ion beam trap.

F Schotsch1, I Zebergs1, S Augustin1

  • 1Max-Planck-Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Baden-Württemberg, Germany.

The Review of Scientific Instruments
|January 1, 2022
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Summary
This summary is machine-generated.

A novel experimental setup combines an Electrostatic Ion Beam Trap (EIBT) with a Reaction Microscope (REMI) for detailed molecular ion reaction studies. This TrapREMI system enables precise measurement of reaction products, advancing chemical dynamics research.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Chemical Physics
  • Experimental Physical Chemistry

Background:

  • Investigating molecular ion and charged cluster reactions requires advanced experimental techniques.
  • Existing methods often lack the capability to fully characterize reaction products in coincidence.
  • Precise control and preparation of ionic targets are crucial for detailed reaction dynamics studies.

Purpose of the Study:

  • To develop and present a novel experimental setup integrating an Electrostatic Ion Beam Trap (EIBT) with a Reaction Microscope (REMI).
  • To enable coincidence spectroscopy of molecular reaction products with unprecedented detail.
  • To demonstrate the capability of the TrapREMI system for advanced target preparation and reaction studies.

Main Methods:

  • Integration of a Reaction Microscope (REMI) within the field-free region of an Electrostatic Ion Beam Trap (EIBT).
  • Coincidence detection of 3D momentum vectors for ions, electrons, and neutral reaction products.
  • Utilizing EIBT capabilities for target preparation, including molecule relaxation and cooling.

Main Results:

  • Successful demonstration of the TrapREMI setup's capability for coincidence spectroscopy.
  • Measurement of 3D momentum vectors of reaction products from photodissociation of H2+.
  • Validation of ion-neutral coincidence detection within the integrated TrapREMI system.

Conclusions:

  • The TrapREMI system offers a unique platform for studying molecular reactions with high precision.
  • The setup allows for advanced target preparation and versatile projectile beam interactions.
  • This technique opens new avenues for investigating complex ion-molecule reaction dynamics and photodissociation processes.