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Could you summarize and paraphrase the steps in this Procedure section? Please take your time to do it carefully!!! Procedure CAUTION: This lab uses high
Could you summarize and paraphrase the steps in this "Procedure" section? Please take your time to do it carefully!!!
Procedure CAUTION: This lab uses high voltages to accelerate the electrons, and can be hazardous! Do not touch any wiring or exposed metallic connections while the device is on. Be sure to turn off your equipment if you need to change connections, and also when you are finished taking data. 1.) Orient the Helmholtz coils so that their faces are parallel to the direction of the Earth's magnetic field (about 15 east of geographic north). This will minimize the effect of the Earth's magnetic field.2.) With all power supplies OFF, take a moment to get familiar with your particular setup. Note the position of two knobs: one which allows you to adjust the current through the Helmholtz coils, and another which allows you to adjust the accelerating voltage. Turn both of knobs to their lowest (most counterclockwise) setting, if possible. 3.) If your setup is NOT the Daedalon apparatus shown in Fig. 1 refer to the Appendix for additional equipment setup instructions. lCl'nce you are condent that your equipment is setup correctly and you understand how to operate it, proceed with the next step. 4.) Turn on all power supplies. Note the following inside the bulb: the silver \"top hat" with a hole in it is the accelerating anode. The lament from which the electrons are boiled is just above this. [1" power is flowing to your lament, you should see it start to glow red after about 30 seconds. 5.) Slowly increase the accelerating voltage until it reaches a voltage lfl (see the table below} OR until you see a clear strong blue-green beam emanating from the anode\". If you do not see the beam, after increasing the accelerating voltage to A131, tell your lab instructor. - Daedalon Apparatus 25w 400v Table 1: 1lFoltage Specications for Different Apparatuses 6.) [Report] Bring a magnet close to the electron beam. Does the beam show a deflection as a result of the bar magnet? Does it move in the way you expected it to? Record your observations. 7.) Slowly increase the curr-t in the Helmholtz coils. You should see the electron beam start to bend into a circular path inside the tube. If you do not see this, tell your lab instructor. Troubleshooting Notes: {a} If the electron beam does not appear to completing afull circle, but instead a short l'clover leafl type orbit back to the lament, increase the accelerating voltage by 50V. (h) [f the electron beam bends in the opposite direction than you want, you need to reverse the direction of the magnetic eld. To change this1 turn all knobs on the power supply to their lowest settings and turn off all power supplies. Then, switch the leads going into the Helmholtz coils. Turn everything back on and then repeat the steps above. 8.} With the accelerating voltage set at .3\" (see table above)1 change the radius of cur vature of the electron beam by adjusting the Helmholtz coil current. Find the current required to make the electron path hold the smallest diameter your apparatus will allow. Note this diameter and it's associated current. 9.} Repeat the above step by finding the current necessary to produce circles with increas- ing diameters, recording the diameters and currents of each. You should attempt to collect measurements for at least 10 unique diameters. 10.} Turn down the knobs on the power supplies to their minimum settings, and turn off all power suppliesStep by Step Solution
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