{"product_id":"thomson-tube-s","title":"Thomson Tube S","description":"Experiment topics: ..\u003cbr\u003eThe following topics can be discussed with this highly evacuated tube: ..\u003cbr\u003e•\tInvestigate the deflection of an electron beam by a magnetic field\u003cbr\u003e•\tInvestigate the deflection of an electron beam by an electric field\u003cbr\u003e•\tBuild a velocity filter using orthogonal electric and magnetic fields\u003cbr\u003e•\tEstimate the specific charge e\/m of an electron.\u003cbr\u003e\u003cbr\u003eProduct Information: ..\u003cbr\u003eThe Thomson 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 S (1000611) 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 milimetre graticule so that the path of the electrons can be easily traced. The mica sheet is held at 10° to the axis of the tube by the two deflecting plates.\u003cbr\u003eThe Thomson 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 :\t2000 V – 5000 V DC\u003cbr\u003eAnode current IA :\t0.1 mA approx. at UA = 4000 V\u003cbr\u003eDeflector plate voltage:\tmax. 350 V\u003cbr\u003eDistance between plates:\t8 mm approx\u003cbr\u003eFluorescent screen:\t80 mm x 80 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":49419051139349,"sku":"3BS1000617","price":2664.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/U18555_01_1200_1200_Thomson-Tube-S.jpg?v=1761020726","url":"https:\/\/unitedsupplycorp.com\/products\/thomson-tube-s","provider":"United Supply Corp.","version":"1.0","type":"link"}