At first sight the problems connected with the electrostatic deflection of a beam of cathode rays would appear to be capable of solution by means of very simple circuits. The velocity in the X direction remains the same throughout the passage of electrons through the deflecting plates as there is no force acting in this direction. Therefore it will be accelerated in that direction. As there is no initial velocity in the Y direction the displacement y at any instant t in the Y direction is; As the velocity in X direction is constant, the displacement in X direction is given by, This is the equation of a parabola. Electrostatic Deflection Cathode Ray Tube Description:- The Electrostatic Deflection version contains two additional electrodes that allow the user to apply voltages and deflect the electron beam in a similar manner and observe the results on the phosphor screen. cathode ray ray tubes type cathode electrostatic deflection deflection type Prior art date 1984-11-28 Legal status (The legal status is an assumption and is not a legal conclusion. Two sets of connecting leads, one set with banana plugs and the other set with alligator clips. Practically the deflecting voltage is a time varying quantity and the image on the screen thus follows the variations of the deflection voltage in a linear manner. Therefore there is no possibility of the ion burn in a CR Tube employing electrostatic deflection. Cathode Ray Tube - Electrostatic Deflection $68.00 Add to cart Pickup available at 202 Martins Lane Usually ready in 2-4 days View store information It is recommended that this product works best using 10,000 volt + Suitable for use with a Rhumkorpf or Spark coil. The main distinction of this project is that the tube uses electrostatic deflection. September 24, 2009. P.O. They need to be handled with great care and mounted in the holders provided before any connections are made or experiments are conducted. where = electric field intensity ; V/m, e = charge of electron = 1.60210 C. The minus sign indicates that the force acts in the opposite direction to that of the field.The above discussion is valid only if the electron is situated in a field of uniform intensity.In practice, however, the field is not uniform.The lateral repulsion of the electric field lines causes a spreading of space between the lines, resulting in curved field lines at the ends. Electrons from an electron gun are accelerated by a potential V_ {ax} V ax in the X direction and enter the transverse field of V_ {d} V d with an initial velocity of v_ {ox}=\sqrt {\frac {2qV_a} {m} } vox = m2qV a (1) Due to V_ {d} V d , the electrons get deflected, reach the end of the plates at P and since there is no accelerating field . Electrostatic deflection derivation of cathode ray oscilloscope(CRO): The figure below shows a general arrangement for, with a potential applied between.These plates produced a uniform an, electrostatic field in the Y direction.Thus any electron entering the field will, experience a force in the Y direction and will be, in that direction.There is no force either in X direction or Z direction and hence there will be no acceleration of electrons in these directions.Now we will derive the equation of, This is the velocity of the electron in the X direction when it enters the deflecting that plates.The velocity in the X direction remains the same throughout the passage of, Substituting the value of Vox = 2eEa/m in, (iii)The deflection is independent of the e/m ratio.In a. The electric field intensity in the Y direction is f, The force acting on the electron in Y direction is, There is no initial velocity in the Y direction so the displacement at any instant 't' in the Y direction is. The deflection is independent of the e/m ratio. The electrostatic deflection system. Low voltage DC power supply: output DC 10-12V, 2. This is the velocity of the electron in the X direction when it enters the deflecting that plates.The velocity in the X direction remains the same throughout the passage of electrons through the deflecting plates as there is no force acting in this direction. This principle is the basis for the deflection of electron beam owing to deflection plates. The electrons in the cathode rays would deflect toward the positively charged plates, and away from the negatively charged plates. Electron Gun- As we discussed this electron gun is used for produced high velocity accelerated electrons. The difference is important, because the electrostatic deflection requires only a sawtooth voltage with negligible current flowing, but the magnetically deflected tube requires a sawtooth current, and the voltage across the deflection coils will not be a sawtooth, because the coils act as a differentiating circuit. Working of Cathode Ray Tube Essentially the device consists of a glass vacuum tube in which an image is generated when a negatively charged plate (called a cathode) is heated so it emits electrons. Tan = (ey/mVox).ld = (e.Ed.ld)/mdVox. The technique is called electrostatic because the strength and direction of the applied field changes slowly relative to the time it takes for the particles to transit the field, and thus can be considered not to change for any single particle. Electrostatic deflection in a Cathode Ray Tube Admin Solution Electrons from an electron gun are accelerated by a potential V_ {ax} V ax in the X direction and enter the transverse field of V_ {d} V d with an initial velocity of v_ {ox}=\sqrt {\frac {2qV_a} {m} } vox = m2qV a (1) The cathode ray tube showing the electrostatic effect is composed of a bubble shell, a baffle, a fluorescent plate, an electric field electrode, a yin rice, an anode, and a bakelite seat. Therefore any electron entering in this field will experience a force in the Y direction. Vertical & Horizontal Amplifiers in Cathode ray oscilloscope(CRO), Different types of errors in electrical measuring instruments. Choosing a selection results in a full page refresh. In CR Tube negative ions such as oxygen, carbon, chlorine etc. pharmaceutical-instruments/Pharmacology Equipments. Feasterville, PA. 19053 The primary purpose of this electron gun is to produce a focused electronic ray with a high frequency. Deflection sensitivity: It is defined as the deflection of the beam on the screen per unit deflection voltage. The two electrostatic deflection plates deflect the accelerated beam by the application of voltage. The electron beam is passed between two parallel metal plates that are charged to a particular voltage. So, the electrons will move in a parabolic path up to point P . Deflecting systems, electrostatic and electro magnetic. Jainco is renowned Exporter and Manufacturer of Electrostatic Deflection Cathode Ray Tube, Electrostatic Deflection Cathode Ray Tube Suppliers, Electrostatic Deflection Cathode Ray Tube Manufacturers throughout the world to be used in Schools, College and Universities [email protected] +0171-2642492; About; Certificates; 0. As the velocity in X direction is constant, the displacement in X direction is given by, Substituting the above value of t, we have. Evacuated glass envelop. A vertical and horizontal deflection electrode system for an electrostatic deflection type cathode ray tube comprises vertical (V+, V-) and horizontal (H+, H-) deflection electrodes formed in patterns on the inner surface of a glass envelope of the tube. The electron beam entering into the deflection plates will accelerate only in the one direction, and hence electrons will not move in the other directions. Crookes tubes are constructed from highly evacuated glass chambers and are therefore fragile. - Electrostatic deflection The curved path is produced by the CRT, which is not of conventional design, deflecting the beam of electrons as the spot moves across the screen. ParaCrawl Corpus During 1895 Rntgen was investigating the external effects from the various types of vacuum tube The figure below shows two concentric cylinders with a potential applied between them.Lateral repulsion again causes the spreading of the flux lines producing a field as shown.The equipotential surfaces are shown as solid lines.It is clear from the diagram that the equipotential surfaces are curved. The Electrostatic Deflection version contains two additional electrodes that allow the user to apply voltages and deflect the electron beam in a similar manner and observe the results on the phosphor screen. Product Code : JA-APE-9391 For Assignments and Projects, Whatsapp on 8289838099. and also types of deflection systems in Cathode Ray Oscilloscope(CRO).Now we will discuss the electrostatic focusing inCathode Ray Oscilloscopetube.Initially, this electron starts from an electron gun.These series of electrons coming from electron gun will form a beam.The figure electric field between parallel plates shows an electron at rest placed in an electric field produced two parallel plates. Circuit . A feature of this invention is the provision of electrostatic deflection electrodes deposited directly on the inner surface of a glass cylinder or cone within a cathode ray tube with the electrodes having interleaved portions which provide the required potential gradient around the electron beam in the tube for producing perpendicular linear . Box CT 1863, Cantonments, Accra, Ghana. NSW Physics Syllabus Reference Module 8: From the Universe to the Atom [3] The rear of a 14-inch color cathode-ray tube showing its deflection coils and electron guns Typical 1950s United States monochrome television set Snapshot of a CRT television showing the line of light being drawn from left to right in a raster pattern when, x = l/2; y = 0 or the straight line PP when projected backwards intersects the X-axis at o. . The electron after leaving the deflecting plates travels in a straight line path leaving the parabolic path. These electrons are focused and beamed onto a surface coated with phosphor, which glows when hit by radiation. 1.38. It is abbreviated by letter 'G'. The vertical deflection plate will move the electron beams from the left to the right, while the horizontal ray will turn the ray up and down. Many thanks to MagLab physicist William Coniglio, the science advisor for this page, for his time and . To demonstrate that Cathode Rays are composed of charged particles. They are used to demonstrate properties of electrons. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); (adsbygoogle = window.adsbygoogle || []).push({}); All Rights Reserved by Electrical Engineering Info @2022, The figure electric field between parallel plates shows an. The deflecting voltage is assumed as a fixed voltage in the explanation above. Mon - Fri 9:00AM - 5:00PM Sat - Sun CLOSED. Deflection factor of a CR Tube: It is defined as the reciprocal of the deflection sensitivity. 3. The deflection sensitivity of a cathode ray tube, which is defined as the vertical deflection . for the following countries: India, Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, Azerbaijan, Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bhutan, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, Brunei, Bulgaria, Burkina Faso, Burma/ Myanmar, Burundi, Cambodia, Cameroon, Canada, Cape Verde, Central African Republic, Chad, Chile, Colombia, Comoros, Congo, Congo, Costa Rica, Cote d'Ivoire/Ivory Coast, Croatia, Cuba, Cyprus, Czech Republic, Denmark, Djibouti, Dominica, Dominican Republic, East Timor, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Ethiopia (Addis Ababa), Fiji, Finland, France, Gabon, Gambia, Georgia, Germany, Ghana, Greece, Grenada, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Honduras, Hungary, Iceland, Indonesia, Iran, Iraq, Ireland, Israel, Italy, Jamaica, Japan, Jordan, Kazakstan, Kenya (Nairobi), Kiribati, Korea, North, Korea, South, Kuwait, Kyrgyzstan, Laos, Latvia, Lebanon, Lesotho, Liberia, Liechtenstein, Lithuania, Luxembourg, Macedonia, Madagascar, Malawi (Lilongwe), Malaysia (Kuala Lumpur), Maldives, Mali, Malta, Marshall Islands, Mauritania, Mauritius, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Morocco, Mozambique, Namibia, Nauru, Nepal, Netherlands, New Zealand, Nicaragua, Niger, Nigeria (Abuja), Norway, Oman, Palau, Panama, Papua New Guinea, Paraguay, Peru, Philippines (Manila), Poland, Portugal, Qatar, Romania, Russia, Rwanda (Kigali), Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Samoa, San Marino, Sao Tome and Principe, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, South Sudan, Spain, Sri Lanka, Sudan, Suriname, Swaziland, Sweden, Switzerland, Syria, Tajikistan, Tanzania, Thailand, Togo, Tonga, Trinidad and Tobago, Tunisia, Turkey, Turkmenistan, Tuvalu, Uganda (Kampala), Ukraine, United Arab Emirates (Dubai), United Kingdom (London), United States, Uruguay, Uzbekistan, Vanuatu, Venezuela, Vietnam, Yemen , Zambia (Lusaka), Zimbabwe, Electrostatic Deflection Cathode Ray Tube. Supporting instruments: 1. In fact, the voltage waveform is a pulse, and this is used in television receivers to generate a very high voltage for the CRT (see later, this chapter). Lss America is a leading Electrostatic Deflection Cathode Ray Tube Lab Equipment Manufacturer,and suppliers in India, Electrostatic Deflection Cathode Ray Tube Lab Equipment Manufacturer,and suppliers in South Africa.Electrostatic Deflection Cathode Ray Tube Lab Equipment Suppliers in Mozambique,Electrostatic Deflection Cathode Ray Tube in Supplier Kenya, Southren African region, Botswana, Lesotho, Malawi, Angola, Namibia, Zambia, Zimbabwe. 3. A uniform electrostatic field is produced by these plates in the Y direction. Deflection sensitivity is abbreviated as `S' Therefore S = D / Ed = L l d / 2dE a meter / volt Deflection factor of a CR Tube: It is defined as the reciprocal of the deflection sensitivity. When energized, the tube produces a bright green line on the phosphor screen clearly showing the electron beam. Focusing and accelerating anodes. best place to buy rubber hex dumbbells Latest News News dynamic font size swift by an electron. (iii)The deflection is independent of the e/m ratio.In a cathode ray tube, in addition to the electrons many types of negative ions such as oxygen, chlorine, carbon etc., are present.With electrostatic deflection system, because deflection is independent of e/m ratio, the ions travel with the electrons and are not concentrated at one point.Hence cathode ray tube with electrostatic deflection system does not produce an ion burn. The word electrostatic means the strength and the direction of the field changes concerning time. This is the velocity of the electron in the X direction when it enters the deflecting plates. From there, the equations of the straight line P decides the motion of the electron and can be found from the equation of the straight line as per the geometry of the Fig. Therefore deflection factor G = I / S = 2dE, The deflection sensitivity can be increased by decreasing the accelerating voltage E. CHAPTER 3 .. Arrangement of elements. You can download this notes to your device in pdf, ppt format. Toll Free: (800) 336-6949, Lss Switzerland has regular exports of Educational Scientific Instruments, School Laboratory Scientific Equipment, Biology Lab Equipment, Physics Lab Equipment, Chemistry Lab Instruments, Laboratory Equipment, Biology Lab Equipment, School lab, Math Lab, Electronics Lab Trainer, Microscopes, Engineering Lab Equipment and Petroleum Testing Equipment, Survey Instruments, Hospital Equipment, Medical Monitoring System and Physiotherapy Equipment for Schools, Colleges, University & Research Labs. An improved mesh lens for PDA-type cathode-ray tubes is constructed in a manner that permits deformation into a concavo-convex shape with a substantially shorter radius of curvature than heretofore obtainable with prior art devices. At least one diode is connected between the output of the amplifier and the load and at least one push-pull emitter follower circuit is provided, the bases of whose transistors are connected to. In addition to experimenting with magnets, scientists also experimented to see what would happen if charged plates were positioned near the tube. The slit allows a narrow beam of electrons to pass through the opening that impacts a phosphor coated screen along the length of the tube. It is abbreviated by letter 'G'. The focusing anode and the accelerating anodes are co-axial with the pre-accelerating anode.The pre-acceleratingand accelerating anodes are connected to the same potential while the focusing anode is connected to a lower potential.On account of the difference of potential between focusing anode and the two accelerating anodes, a non-uniform field exists on each of the two ends of the focusing anode.The equipotential surfaces, thus, form a double concave lens. Electrostatic deflection refers to a way for modifying the path of a beam of charged particles by the use of an electric field applied transverse to the path of the particles. Electrostatic Focusing in Cathode Ray Oscilloscope(CRO): = velocity of electrons after leaving surface S, The refraction of an electron beam follows as the bending of a light beam at a retracting surface such as an optical lens.For this reason, the focusing system in a, The focusing anode and the accelerating anodes are co-axial with the pre-accelerating anode.The pre-. The figure below shows a general arrangement forelectrostatic deflection in cro.There are two parallel plateswith a potential applied between.These plates produced a uniform anelectrostatic field in the Y direction.Thus any electron entering the field willexperience a force in the Y direction and will be acceleratedin that direction.There is no force either in X direction or Z direction and hence there will be no acceleration of electrons in these directions.Now we will derive the equation of electrostatic deflection in crt tube. High pressure induction coil: spark distance 50-80mm. (ii) The discussion above assumes that Ed is a fixed dc voltage.The deflection voltage is usually a time varying quantity and the image of the screen thus follows the variations of the deflection voltage in a linear manner. These two movements are independent of each other which causes the beam to be positioned anywhere on the screen. GB1256195A GB35556/70A GB3555670A GB1256195A GB 1256195 A GB1256195 A GB 1256195A GB 35556/70 A GB35556/70 A GB 35556/70A GB 3555670 A GB3555670 A GB 3555670A GB 1256195 A GB1256195 A GB 1256195A Authority GB United Kingdom Prior art keywords guns potential mesh electron guns cathode Prior art date 1969-07-23 Legal status (The legal status is an assumption and is not a legal conclusion. The equation of motion up to P between the plates is as given by the equation. To get this glow (and therefore the image) to appear across an entire screen, the beam of electrons must be deflected to every possible spot across the screen. At x = l/2; that is o bisects the line. The cathode ray tube uses deflecting plates for modifying the path of electrons. Let us consider the region on the two sides of an equipotential surface S as shown in the below figure.The potential on the left side of the surface is -V and on the right side is +V.Let an electron moving in a direction AB enter the area to the left of S.This electron experiences a force which is normal to the surface S and is thus accelerated. After leaving the Electrostatic deflection plates, electrons travel in a straight line. Expired Application number DE8585308688T Other languages and accelerating anodes are connected to the same potential while the focusing anode is connected to a lower potential.On account of the difference of potential between focusing anode and the two accelerating anodes, a non-uniform field exists on each of the two ends of the focusing anode.The equipotential surfaces, thus, form a double concave lens. This means that the CRT may be used as a linear indicating device. This is because of the fact that it crossed the electric field that influenced its motion. CRT-Cathode Ray Tube. As deflection is independent of e/m in an electrostatic deflecting system the ions travel with the electrons and are not concentrated at one point. The electron gun. Now here we have discussed electrostatic focusingin cathode ray oscilloscope andelectrostatic deflection derivation in cathode ray oscilloscope(CRO).You can download this notes to your device in pdf, ppt format. The results showed electrostatic deflection (as opposed to the electromagnetic deflection described above). The refraction of an electron beam follows as the bending of a light beam at a retracting surface such as an optical lens.For this reason, the focusing system in a CRT is known as electron lens.The below figure shows the functional diagram of an electrostatic focusingin Cathode Ray Oscilloscope.The pre-accelerating anode, which is a metal cylinder containing many baffles, collimates the electron beam which enters it through a small opening on the left hand side.The pre-accelerating anode is connected to a high positive potential. Having seen the focusing system we now study the deflecting system used in cathode ray tube. From the equation (6) for deflection sensitivity, the deflection sensitivity S is independent of the charge and mass of the electrons. Notebook monitors with cathode-ray tube (CRT) are sources of electrostatic fields, X-rays, ultraviolet and infrared rays, and (over-) low-frequency electromagnetic radiation. It is recommended that this product works best using 10,000 volt +. The cathode-ray tube. Tracing by a moving spot of light. A potential is applied between two parallel plates. \((y-y_1)=(\tan \theta )(x-x_1)=\frac{dy}{dx}(x-x_1) \) (2), \(y=\tan \theta\left\lgroup x-x_1+\frac{y_1}{\tan \theta} \right\rgroup \) (3) At P, \(x_1=l\) and \(y_1=y\) at, \(l\frac{1}{2}\left[\frac{a_y}{V^2_ax} \right] l^2=y_1 \) But \(\frac{dy}{dx}= \tan \theta=\frac{a_y.l}{v^2_{ox}} \) at \(y_1 =y_{atl}\) Therefore, \(y=\tan \theta\left\lgroup x-l+\frac{1}{2}\left[\frac{a_y}{v^2_{ox}}\right]l^2\frac{v^2_{ox}}{a_y l} \right\rgroup =\tan \theta\left\lgroup x-\frac{l}{2} \right\rgroup\) On simplification, \(Y=\tan \theta \left\lgroup x-\frac{1}{2} \right\rgroup\) (4). function of Eric's boards is to convert low voltage drive from Tiny TV to the extremely high voltages required by these cathode ray tubes. The figure below describes the basic arrangement for electrostatic deflection. The following figure shows the arrangement for the electrostatic deflection. The effect of applying a voltage to the deflecting plates is discussed below. The electron gun and electrostatic deflection plates are both housed in this tube. Electrostatic deflection is commonly used in oscilloscopes. An Online Resource for Electronics and Communications Study Materials. 832 Pennsylvania Blvd Photomultiplier tubes (photomultipliers or PMTs for short) are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum.They are members of the class of vacuum tubes, more specifically vacuum phototubes.These detectors multiply the current produced by incident light by as much as 100 million times or 10 8 (i.e., 160 dB), in . The electrons in the cathode rays would deflect toward the positively charged plates, and away from the negatively charged plates. The Electrostatic Deflection Sensitivity in cathode ray tube is defined as the deflection of the beam on the screen per unit deflection voltage and is represented as S e = (l * L)/(2* d * V a) or Electrostatic deflection sensitivity = (Length of deflecting plates * Length in cathode ray tube)/(2* Distance between deflecting plates * Voltage of . That these problems are, in fact, not easily solved has become increasingly apparent as the cathode-ray tube has been developed. The electron beams entering the eld at angles other than the normal to the equipotential surfaces will be deected towards the normal and the beam is thus focused towards the centre of the tube axis.By changing the voltage of the focusing anode, the refractive index of the electron lens is changed and therefore the focal point of the beam can be changed.The change in voltage is brought about by changing the setting of a potentiometer.This control is brought to the front panel of CRO and is marked FOCUS. Deflection sensitivity: It is defined as the deflection of the beam on the screen per unit deflection voltage. Save my name, email, and website in this browser for the next time I comment. A uniform electric field is produced by the plates, in the Y direction. Deflection sensitivity is abbreviated as `S'. So , \(D=\frac{a_yl}{V^2_{ox}}\left\lgroup L+\frac{l}{2}-\frac{l}{2} \right\rgroup =\frac{a_ylL}{V^2_{ox}}\) But \(a_y=\frac{V_d}{d}.\frac{q}{m} \) and \(V^2_{ox}=\frac{2qV_a}{m} \), \(D=\frac{V_d}{d}.\frac{q}{m}.\frac{m}{2q}.\frac{lL}{V_a}=\frac{V_dlL}{2V_ad} \) (5) D is proportional to \(V_d \) The deflection Sensitivity \(S\overset{\sim }{= }\frac{D}{V_d}=\frac{l.L}{2.V_a.d} \) (6). However the straight line path is tangential to the parabolic path at x =, The apparent origin O' is at the centre of the deflection plates from the equation. There are two parallel plates with a potential in between them. The electric field intensity in the Y direction; Force acting on an electron in Y direction; Suppose ay is the acceleration of the electron in Y direction, therefore. The just above Equation is of a parabola. NSW Physics Syllabus ReferenceModule 8: From the Universe to the AtomStructure of the Atom, Subscribe to hear about upcoming workshops, Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device, Science with Mat PTY LTD ABN 35 651 995 318. There are four types of evacuated tubes, known as Crookes Tubes:-, Three items are required to operate the unit:-. From the above equation the following conclusions can be made : 2. Electrostatic Deflection Plates The deflection plate produces the uniform electrostatic field only in the one direction. Sylvania 3BP1 Electrostatic 3inch Deflection Cathode Ray Tube- BangyBa - Bangybang Brand Sylvania Model Number CHS- 3BP1 Screen size (inch) 3 inch Length (inch) 10 inch Info Medium Shell Diheptal 12-Pin P1 Green Fluorescence Face Faceplate, clear, cylindrical 6.3V - 0.6 mA #CRT Brand Sylvania Model Number CHS- 3BP1 Screen size (inch) 3 inch A mesh lens (12) formed in accordance with this invention particularly comprises of multitude of interconnected webs (58) forming an array of apertures (60). Due to \(V_{d}\) , the electrons get deflected, reach the end of the plates at P and since there is no accelerating field beyond P, they continue in a linear path and touch the screen at P as shown in Fig. (i) For a given accelerating voltage Ea and for particular dimensions of CRT, the deflection of the electron beam is directly proportional to the deflecting voltage. (iii)The deflection is independent of the e/m ratio.In a cathode ray tube, in addition to the electrons many types of negative ions such as oxygen, chlorine, carbon etc., are present.With electrostatic deflection system, because deflection is independent of e/m ratio, the ions travel with the electrons and are not concentrated at one point.Hence cathode ray tube with electrostatic deflection system does not produce an ion burn. Consists of a thin aluminum sheet with a thin slit in it near one electrode. Lab and School Supplies America Ltd d = distance between deflecting plates; m, L = distance between screen and the centre of the deflecting plates; m and, D = deflection of electron beam on the screen in the direction Y; m, The loss of potential energy when the electron moves from cathode to accelerating anode, The gain in kinetic energy by the electron is. - Cathode-ray tube amusement device Function of the gun. The deflection D on the screen is given by. The deflection D can be found from the geometry again.
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