ELECTRON DIFFRACTION TUBE ‘D’: 6.3-Volt AC

ELECTRON DIFFRACTION TUBE 'D': 6.3-Volt AC

• Highly evacuated Electron Diffraction Tube for demonstrating the wave nature of electrons through the observation of interference caused by passage of electrons through a polycrystalline graphite lattice (Debye-Scherrer diffraction) and rendered visible a fluorescent screen.
• Intended for determining the wavelength as a function of the anode voltage from the radii of the diffraction rings and the lattice plane spacing of graphite, as well as confirming de Broglies hypothesis.
• Max. filament voltage: 6.3 V AC,
• Max. anode voltage: 5 kV,
• Anode current: approx. 0.1 mA at 4 kV,
• Lattice constant of graphite: d10 = 0.213 nm; d11 = 0.123 nm.
• Weight 0.281 kg

(Wikipedia excerpt: ..."...Electron diffraction is a generic term for phenomena associated with changes in the direction of electron beams due to elastic interactions with atoms.[a] It occurs due to elastic scattering, when there is no change in the energy of the electrons.[1]: Chpt 4 [2]: Chpt 5 [3][4] The negatively charged electrons are scattered due to Coulomb forces when they interact with both the positively charged atomic core and the negatively charged electrons around the atoms. The resulting map of the directions of the electrons far from the sample is called a diffraction pattern, see for instance Figure 1. Beyond patterns showing the directions of electrons, electron diffraction also plays a major role in the contrast of images in electron microscopes. ..")