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<h2 class="hd hd-2 unit-title">3.1.3. Video Lecture</h2>
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<h2 class="hd hd-2 unit-title">3.1.3. 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/v1/4495ad509046b04aa8f37e37d9deb405/asset-v1:MITx+22.011x+3T2018+type@asset+block/Unit_3.1.3_required_pdf_lecture_notes__vf.pdf" target="[object Object]">Lecture 3.1.3. [Fusion for Energy Applications] - Required Lecture Notes</a></p>
<p><a href="/assets/courseware/v1/0c3e27f0a8f2291404dd31368bb21258/asset-v1:MITx+22.011x+3T2018+type@asset+block/Unit_3.1.3_optional_pdf_lecture_notes__vf.pdf" target="[object Object]">Lecture 3.1.3. [Fusion for Energy Applications] - Optional Lecture Notes</a></p>
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<h2 class="hd hd-2 unit-title">3.1.3. Required Assessment</h2>
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Assessment 1
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<legend id="98973d7327134e73b859ef99fa1651fc_2_1-legend" class="response-fieldset-legend field-group-hd">Choose from this list the properties of tritium.</legend>
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<input type="radio" name="input_cfd772e07e1941c7a2d1939241205cba_2_1" id="input_cfd772e07e1941c7a2d1939241205cba_2_1_choice_3" class="field-input input-radio" value="choice_3"/><label id="cfd772e07e1941c7a2d1939241205cba_2_1-choice_3-label" for="input_cfd772e07e1941c7a2d1939241205cba_2_1_choice_3" class="response-label field-label label-inline" aria-describedby="status_cfd772e07e1941c7a2d1939241205cba_2_1 description_cfd772e07e1941c7a2d1939241205cba_1_1"> A proton and a helium-3 nucleus
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Assessment 3
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<legend id="390fc2e48a96415e8b65e65471926388_2_1-legend" class="response-fieldset-legend field-group-hd">How is nuclear energy from a D-T reaction captured to create electricity in a fusion system?</legend>
<p class="question-description" id="description_390fc2e48a96415e8b65e65471926388_1_1">Choose all that apply </p>
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<input type="checkbox" name="input_390fc2e48a96415e8b65e65471926388_2_1[]" id="input_390fc2e48a96415e8b65e65471926388_2_1_choice_0" class="field-input input-checkbox" value="choice_0"/><label id="390fc2e48a96415e8b65e65471926388_2_1-choice_0-label" for="input_390fc2e48a96415e8b65e65471926388_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_390fc2e48a96415e8b65e65471926388_2_1 description_390fc2e48a96415e8b65e65471926388_1_1"> In a D-T reaction, the energetic neutron produced is used to generate electricity by conversion of the neutron&#8217;s kinetic energy to heat
</label>
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<input type="checkbox" name="input_390fc2e48a96415e8b65e65471926388_2_1[]" id="input_390fc2e48a96415e8b65e65471926388_2_1_choice_1" class="field-input input-checkbox" value="choice_1"/><label id="390fc2e48a96415e8b65e65471926388_2_1-choice_1-label" for="input_390fc2e48a96415e8b65e65471926388_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_390fc2e48a96415e8b65e65471926388_2_1 description_390fc2e48a96415e8b65e65471926388_1_1"> Gamma rays are produced in a D-T reaction and are used to generate electricity
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<input type="checkbox" name="input_390fc2e48a96415e8b65e65471926388_2_1[]" id="input_390fc2e48a96415e8b65e65471926388_2_1_choice_2" class="field-input input-checkbox" value="choice_2"/><label id="390fc2e48a96415e8b65e65471926388_2_1-choice_2-label" for="input_390fc2e48a96415e8b65e65471926388_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_390fc2e48a96415e8b65e65471926388_2_1 description_390fc2e48a96415e8b65e65471926388_1_1"> The fast-moving 14.1 MeV neutron produced by a D-T reaction is slowed down in some kind of appropriate material (let&#8217;s call it a blanket), which heats up. A heat exchange process between the hot blanket and a cooler material is used to generate electricity
</label>
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<input type="checkbox" name="input_390fc2e48a96415e8b65e65471926388_2_1[]" id="input_390fc2e48a96415e8b65e65471926388_2_1_choice_3" class="field-input input-checkbox" value="choice_3"/><label id="390fc2e48a96415e8b65e65471926388_2_1-choice_3-label" for="input_390fc2e48a96415e8b65e65471926388_2_1_choice_3" class="response-label field-label label-inline" aria-describedby="status_390fc2e48a96415e8b65e65471926388_2_1 description_390fc2e48a96415e8b65e65471926388_1_1"> Visible light is produced in a D-T reaction, so a fusion light bulb could be built
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Assessment 4
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<legend id="12d7fda40be642478c631ce5160f2449_2_1-legend" class="response-fieldset-legend field-group-hd">What is a nuclear cross section?</legend>
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<input type="radio" name="input_12d7fda40be642478c631ce5160f2449_2_1" id="input_12d7fda40be642478c631ce5160f2449_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="12d7fda40be642478c631ce5160f2449_2_1-choice_0-label" for="input_12d7fda40be642478c631ce5160f2449_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_12d7fda40be642478c631ce5160f2449_2_1 description_12d7fda40be642478c631ce5160f2449_1_1"> The nuclear cross section is used to characterize the probability that a nuclear reaction will occur
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<input type="radio" name="input_12d7fda40be642478c631ce5160f2449_2_1" id="input_12d7fda40be642478c631ce5160f2449_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="12d7fda40be642478c631ce5160f2449_2_1-choice_1-label" for="input_12d7fda40be642478c631ce5160f2449_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_12d7fda40be642478c631ce5160f2449_2_1 description_12d7fda40be642478c631ce5160f2449_1_1"> The nuclear cross section is a nucleus that is cut in half
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<input type="radio" name="input_12d7fda40be642478c631ce5160f2449_2_1" id="input_12d7fda40be642478c631ce5160f2449_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="12d7fda40be642478c631ce5160f2449_2_1-choice_2-label" for="input_12d7fda40be642478c631ce5160f2449_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_12d7fda40be642478c631ce5160f2449_2_1 description_12d7fda40be642478c631ce5160f2449_1_1"> The nuclear cross section is the size of a nucleus before undergoing a nuclear reaction
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Assessment 5
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<p class="question-description" id="description_67c172c65dd8457891a6c03c798f0296_1_1">Select only one option</p>
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<input type="radio" name="input_67c172c65dd8457891a6c03c798f0296_2_1" id="input_67c172c65dd8457891a6c03c798f0296_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="67c172c65dd8457891a6c03c798f0296_2_1-choice_0-label" for="input_67c172c65dd8457891a6c03c798f0296_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_67c172c65dd8457891a6c03c798f0296_2_1 description_67c172c65dd8457891a6c03c798f0296_1_1"> \(D-T\)
</label>
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<input type="radio" name="input_67c172c65dd8457891a6c03c798f0296_2_1" id="input_67c172c65dd8457891a6c03c798f0296_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="67c172c65dd8457891a6c03c798f0296_2_1-choice_1-label" for="input_67c172c65dd8457891a6c03c798f0296_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_67c172c65dd8457891a6c03c798f0296_2_1 description_67c172c65dd8457891a6c03c798f0296_1_1"> \(D-D\)
</label>
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<input type="radio" name="input_67c172c65dd8457891a6c03c798f0296_2_1" id="input_67c172c65dd8457891a6c03c798f0296_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="67c172c65dd8457891a6c03c798f0296_2_1-choice_2-label" for="input_67c172c65dd8457891a6c03c798f0296_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_67c172c65dd8457891a6c03c798f0296_2_1 description_67c172c65dd8457891a6c03c798f0296_1_1"> \(D-He^3 \)
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<h3 class="hd hd-3 problem-header" id="6d278aa9ef10446cad706d215c9e4e17-problem-title" aria-describedby="block-v1:MITx+22.011x+3T2018+type@problem+block@6d278aa9ef10446cad706d215c9e4e17-problem-progress" tabindex="-1">
Assessment 6
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<legend id="6d278aa9ef10446cad706d215c9e4e17_2_1-legend" class="response-fieldset-legend field-group-hd">Which of the following statements apply to the \(D-T\) fusion cross section?</legend>
<p class="question-description" id="description_6d278aa9ef10446cad706d215c9e4e17_1_1">Choose all that apply </p>
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<input type="checkbox" name="input_6d278aa9ef10446cad706d215c9e4e17_2_1[]" id="input_6d278aa9ef10446cad706d215c9e4e17_2_1_choice_0" class="field-input input-checkbox" value="choice_0"/><label id="6d278aa9ef10446cad706d215c9e4e17_2_1-choice_0-label" for="input_6d278aa9ef10446cad706d215c9e4e17_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_6d278aa9ef10446cad706d215c9e4e17_2_1 description_6d278aa9ef10446cad706d215c9e4e17_1_1"> Quantum tunneling is important for fusion because it makes in easier to penetrate the Coulomb barrier
</label>
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<input type="checkbox" name="input_6d278aa9ef10446cad706d215c9e4e17_2_1[]" id="input_6d278aa9ef10446cad706d215c9e4e17_2_1_choice_1" class="field-input input-checkbox" value="choice_1"/><label id="6d278aa9ef10446cad706d215c9e4e17_2_1-choice_1-label" for="input_6d278aa9ef10446cad706d215c9e4e17_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_6d278aa9ef10446cad706d215c9e4e17_2_1 description_6d278aa9ef10446cad706d215c9e4e17_1_1"> There is an optimum energy where the fusion cross-section peaks
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<input type="checkbox" name="input_6d278aa9ef10446cad706d215c9e4e17_2_1[]" id="input_6d278aa9ef10446cad706d215c9e4e17_2_1_choice_2" class="field-input input-checkbox" value="choice_2"/><label id="6d278aa9ef10446cad706d215c9e4e17_2_1-choice_2-label" for="input_6d278aa9ef10446cad706d215c9e4e17_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_6d278aa9ef10446cad706d215c9e4e17_2_1 description_6d278aa9ef10446cad706d215c9e4e17_1_1"> The fusion cross section is highest at low energies
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<input type="checkbox" name="input_6d278aa9ef10446cad706d215c9e4e17_2_1[]" id="input_6d278aa9ef10446cad706d215c9e4e17_2_1_choice_3" class="field-input input-checkbox" value="choice_3"/><label id="6d278aa9ef10446cad706d215c9e4e17_2_1-choice_3-label" for="input_6d278aa9ef10446cad706d215c9e4e17_2_1_choice_3" class="response-label field-label label-inline" aria-describedby="status_6d278aa9ef10446cad706d215c9e4e17_2_1 description_6d278aa9ef10446cad706d215c9e4e17_1_1"> The fusion cross section is highest at high energies
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Assessment 7
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<legend id="2abb7119e60d445b889f1542080a0806_2_1-legend" class="response-fieldset-legend field-group-hd">In Nuclear physics, energy is expressed in terms of \(eV\) units. The optimum energy of D and T involved in a fusion reaction will be:</legend>
<p class="question-description" id="description_2abb7119e60d445b889f1542080a0806_1_1">Select only one option</p>
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<input type="radio" name="input_2abb7119e60d445b889f1542080a0806_2_1" id="input_2abb7119e60d445b889f1542080a0806_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="2abb7119e60d445b889f1542080a0806_2_1-choice_0-label" for="input_2abb7119e60d445b889f1542080a0806_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_2abb7119e60d445b889f1542080a0806_2_1 description_2abb7119e60d445b889f1542080a0806_1_1"> Less than \(1 eV\)
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<input type="radio" name="input_2abb7119e60d445b889f1542080a0806_2_1" id="input_2abb7119e60d445b889f1542080a0806_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="2abb7119e60d445b889f1542080a0806_2_1-choice_1-label" for="input_2abb7119e60d445b889f1542080a0806_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_2abb7119e60d445b889f1542080a0806_2_1 description_2abb7119e60d445b889f1542080a0806_1_1"> About \(10 eV\)
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<input type="radio" name="input_2abb7119e60d445b889f1542080a0806_2_1" id="input_2abb7119e60d445b889f1542080a0806_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="2abb7119e60d445b889f1542080a0806_2_1-choice_2-label" for="input_2abb7119e60d445b889f1542080a0806_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_2abb7119e60d445b889f1542080a0806_2_1 description_2abb7119e60d445b889f1542080a0806_1_1"> About \(100 keV\)
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<input type="radio" name="input_2abb7119e60d445b889f1542080a0806_2_1" id="input_2abb7119e60d445b889f1542080a0806_2_1_choice_3" class="field-input input-radio" value="choice_3"/><label id="2abb7119e60d445b889f1542080a0806_2_1-choice_3-label" for="input_2abb7119e60d445b889f1542080a0806_2_1_choice_3" class="response-label field-label label-inline" aria-describedby="status_2abb7119e60d445b889f1542080a0806_2_1 description_2abb7119e60d445b889f1542080a0806_1_1"> More than \(1000 keV\)
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