{"product_id":"deflection-tube-d","title":"Deflection Tube D","description":"Experiment Topics: ..\u003cbr\u003eThe following topics can be discussed with this highly evacuated tube: \u003cbr\u003e•  Investigate the deflection of an electron beam by a magnetic field\u003cbr\u003e•  Investigate the deflection of an electron beam by an electric field\u003cbr\u003e•  Build a velocity filter using orthogonal electric and magnetic fields\u003cbr\u003e•  Estimate the specific charge e\/m of an electron.\u003cbr\u003e\u003cbr\u003eProduct Information: ..\u003cbr\u003eThe electron-beam deflection tube comprises an electron gun which emits a narrow, focussed ribbon of cathode rays within an evacuated, clear glass bulb. A tungsten 'hairpin' filament hot cathode is heated directly and the anode takes the form of a cylinder. The deflection of rays can be achieved electrostatically by means of a built-in plate capacitor formed by the pair of deflection plates or magnetically with the help of the Helmholtz coils D (1000644) magnetically. The cathode rays are intercepted by a flat mica sheet, one side of which is coated with a fluorescent screen and the other side of which is printed with a centimetre graticule so that the path of the electrons can be easily traced. The mica sheet is held at 15° to the axis of the tube by the two deflecting plates.\u003cbr\u003eThe electron-beam deflection tube is intended for investigating the deflection of electron beams in electrical and magnetic fields. It can be used to estimate the specific charge of an electron e\/m and to determine the electron velocity v.\u003cbr\u003e\u003cbr\u003eSpecifications: ..\u003cbr\u003eFilament voltage UF :\tmax. 6.3 V AC\/DC\u003cbr\u003eAnode voltage UA :\t1000 V – 5000 V DC\u003cbr\u003eAnode current IA :\t0.1 mA approx. at UA = 4000 V\u003cbr\u003eDeflector plate voltage:\tmax. 5000 V\u003cbr\u003eDistance between plates:\t54 mm approx\u003cbr\u003eFluorescent screen:\t90 mm x 60 mm approx\u003cbr\u003eGlass bulb:\t130 mm Ø approx\u003cbr\u003eTotal length:\t260 mm approx","brand":"3B Scientific Teltron","offers":[{"title":"Default Title","offer_id":49419051467029,"sku":"3BS1000651","price":3102.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/U19155_01_1200_1200_Deflection-Tube-D.jpg?v=1761020773","url":"https:\/\/unitedsupplycorp.com\/products\/deflection-tube-d","provider":"United Supply Corp.","version":"1.0","type":"link"}