{"product_id":"electron-diffraction-tube-s","title":"Electron Diffraction Tube S","description":"Experiment Topics: ..\u003cbr\u003eThe following topics can be discussed with this highly evacuated tube: \u003cbr\u003e•  Illustration of the wave nature of electrons\u003cbr\u003e•  Determination of the wavelength of electrons depending on the anode voltage\u003cbr\u003e•  Debye-Scherrer diffraction\u003cbr\u003e•  Confirmation of the de Broglie hypothesis\u003cbr\u003e\u003cbr\u003eProduct Information: ..\u003cbr\u003eThe electron diffraction tube is a highly evacuated tube with an electron gun consisting of a pure tungsten heater filament and a cylindrical anode all contained in a clear glass bulb. The electrons emitted by the heated cathode are constrained to a narrow beam by an aperture and are then focussed by means of an electron-optical system. The resulting tight, monochromatic beam then passes through a micro-mesh nickel grating situated at the aperture of the gun. Onto this grid, a thin layer of polycrystalline graphitised carbon has been deposited by vaporisation. This layer affects the electrons in the beam much like a diffraction grating. The result of this diffraction is seen in the form of an image comprising two concentric rings that become visible on the fluorescent screen. A spot resulting from the undeflected electron beam continues to be visible at the centre of the rings.\u003cbr\u003eA magnet is also supplied with the tube. This allows the direction of the electron beam to be changed, which may be necessary if the graphite target has slight damage as a result of the manufacturing process or due to later overheating.\u003cbr\u003e\u003cbr\u003eSpecifications: ..\u003cbr\u003eFilament voltage UF :\tmax. 6.3 V AC\/DC\u003cbr\u003eAnode voltage UA :\t0 – 5000 V DC\u003cbr\u003eAnode current IA:\ttyp. 150 µA at UA = 4000 V\u003cbr\u003eLattice constant of graphite:\td10 = 0.213 nm; d11 = 0.123 nm\u003cbr\u003eDistance from graphite target\u003cbr\u003eto fluorescent screen:\t125 ± 2 mm  approx.\u003cbr\u003eFluorescent screen:\t100 mm Ø  approx.\u003cbr\u003eGlass bulb:\t130 mm Ø  approx.\u003cbr\u003eTotal length:\t260 mm  approx.","brand":"3B Scientific Teltron","offers":[{"title":"Default Title","offer_id":49419138269461,"sku":"3BS1013889","price":3243.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/U185711_01_1200_1200_Electron-Diffraction-Tube-S.jpg?v=1761029097","url":"https:\/\/unitedsupplycorp.com\/products\/electron-diffraction-tube-s","provider":"United Supply Corp.","version":"1.0","type":"link"}