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<h2 class="hd hd-2 unit-title">3.2.5. Video Lecture</h2>
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<h2 class="hd hd-2 unit-title">3.2.5. Notes & Additional Material</h2>
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<p><strong>Use the following links to download this lecture's notes:</strong></p>
<p><a href="/assets/courseware/v1/120162a0e23980ced79cdad1215348a6/asset-v1:MITx+22.011x+3T2018+type@asset+block/Unit_3.2.5_required_pdf_lecture_notes_vf.pdf" target="[object Object]">Lecture 3.2.5. [Introduction to the Tokamak] - Required Lecture Notes</a></p>
<p><a href="/assets/courseware/v1/847d687b31e73cea3cfc95d627cd9754/asset-v1:MITx+22.011x+3T2018+type@asset+block/Unit_3.2.5_optional_pdf_lecture_notes_vf.pdf" target="[object Object]">Lecture 3.2.5. [Introduction to the Tokamak] - Optional Lecture Notes</a></p>
<p><strong>Optional reading section</strong></p>
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<h2 class="hd hd-2 unit-title">3.2.5. Required Assessment</h2>
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Assessment 1
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<legend id="a6975230a0114bffa7128dff924250cd_2_1-legend" class="response-fieldset-legend field-group-hd">Why will a hot plasma expand?</legend>
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<input type="radio" name="input_a6975230a0114bffa7128dff924250cd_2_1" id="input_a6975230a0114bffa7128dff924250cd_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="a6975230a0114bffa7128dff924250cd_2_1-choice_0-label" for="input_a6975230a0114bffa7128dff924250cd_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_a6975230a0114bffa7128dff924250cd_2_1"> the self-generated electric and magnetic fields in the plasma cause an outward force
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Assessment 2
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<legend id="aa86c5806fd2480a8355bf045cc15a1b_2_1-legend" class="response-fieldset-legend field-group-hd">A magnetic field can be used to counteract the outward expansion of a hot plasma according to MHD theory. Choose the correct equation that describes this force balance.</legend>
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<input type="radio" name="input_aa86c5806fd2480a8355bf045cc15a1b_2_1" id="input_aa86c5806fd2480a8355bf045cc15a1b_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="aa86c5806fd2480a8355bf045cc15a1b_2_1-choice_2-label" for="input_aa86c5806fd2480a8355bf045cc15a1b_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_aa86c5806fd2480a8355bf045cc15a1b_2_1 description_aa86c5806fd2480a8355bf045cc15a1b_1_1"> \(&#8711;P = J &#215; &#914;\), where \(J\) and \(&#914;\) are a current and magnetic field, respectvely
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<h3 class="hd hd-3 problem-header" id="13b7c25f3b614f87802782045706b659-problem-title" aria-describedby="block-v1:MITx+22.011x+3T2018+type@problem+block@13b7c25f3b614f87802782045706b659-problem-progress" tabindex="-1">
Assessment 3
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<legend id="13b7c25f3b614f87802782045706b659_2_1-legend" class="response-fieldset-legend field-group-hd">In a tokamak, how is the plasma current generated?</legend>
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<input type="radio" name="input_13b7c25f3b614f87802782045706b659_2_1" id="input_13b7c25f3b614f87802782045706b659_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="13b7c25f3b614f87802782045706b659_2_1-choice_0-label" for="input_13b7c25f3b614f87802782045706b659_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_13b7c25f3b614f87802782045706b659_2_1"> it is imposed with external electrodes
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<input type="radio" name="input_13b7c25f3b614f87802782045706b659_2_1" id="input_13b7c25f3b614f87802782045706b659_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="13b7c25f3b614f87802782045706b659_2_1-choice_2-label" for="input_13b7c25f3b614f87802782045706b659_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_13b7c25f3b614f87802782045706b659_2_1"> it is generated using external magnets
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Assessment 4
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<legend id="6b6d3f88a44e4f6abb3774c3ff42b00e_2_1-legend" class="response-fieldset-legend field-group-hd">In a tokamak, two of the three magnetic fields needed to confine the plasma (toroidal, poloidal, vertical) are generated using</legend>
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<input type="radio" name="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1" id="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="6b6d3f88a44e4f6abb3774c3ff42b00e_2_1-choice_0-label" for="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1"> The vertical field. It is caused by the plasma current.
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<input type="radio" name="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1" id="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="6b6d3f88a44e4f6abb3774c3ff42b00e_2_1-choice_1-label" for="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1"> The poloidal field. It is caused by the plasma current.
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<input type="radio" name="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1" id="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="6b6d3f88a44e4f6abb3774c3ff42b00e_2_1-choice_2-label" for="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1"> The toroidal field. It is caused by the plasma current.
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