Wien filter

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A Wien filter is a device consisting of perpendicular electric and magnetic fields that can be used as a velocity filter for charged particles, for example in electron microscopes and spectrometers.[1][2] It is named for Wilhelm Wien who developed it in 1898 for the study of anode rays.[3][4] It can be configured as a charged particle energy analyzer, monochromator, or mass spectrometer.[1][2]

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References[edit]

  1. ^ a b H. H. Rose (2008). "Optics of high-performance electron Microscopes". Science and Technology of Advanced Materials (free download review on electron optics) 9 (1): 014107. Bibcode:2008STAdM...9a4107R. doi:10.1088/0031-8949/9/1/014107. 
  2. ^ a b Galejs, A. (1978). "Focusing and dispersing properties of a stigmatic crossed-field energy analyzer" (free-download pdf). Journal of Vacuum Science and Technology 15 (3): 865. Bibcode:1978JVST...15..865G. doi:10.1116/1.569615. 
  3. ^ Wien, W. (1898). "Untersuchungen über die electrische Entladung in verdünnten Gasen". Ann. der Physik 301 (6): 440. Bibcode:1898AnP...301..440W. doi:10.1002/andp.18983010618. 
  4. ^ Wien, Karl (1999). "100 years of ion beams: Willy Wien's canal rays" (free-download pdf). Brazilian Journal of Physics 29 (3). Bibcode:1999BrJPh..29..401W. doi:10.1590/S0103-97331999000300002.