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2_pdfsam_Quizzes 11-14 solutions_1

# 2_pdfsam_Quizzes 11-14 solutions_1 - A deuterium(D = 21H...

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Unformatted text preview: A deuterium (D = 21H) has a mass—energy 2.014102 u (931.4914 MeV/u). To have sustained thermonuclear fusion in the D + D 9 32He + o n or 9 31H + 1H, it is necessary to have a temperature of 4 X 103 K, roughly equivalent to an average kinetic energy of 5 X 104 eV. a. To make fusion feasible, it is necessary to bring the two deuterium nuclei Close together against the repulsive Coulomb potential. Estimate the distance and Coulomb energy barrier (how high) using the Coulomb potential and conservation of energy (2 + 2 points). NW KS. pu parh'dﬂ. ~_ 5.10“ w Fm 1"fcu‘l'tdL Colitstm odt mini? ameliitwc Tolc'vl KE“ Po‘lw'bal Born-{w (1011\me 15m” jun-105 avg M = kiﬁ't sz: J 1105 (110216“) % ‘ kit; {.LH.[0‘H 01-10“ (1.102. 10““) b. Find the energy released in the reaction, D + D 9 3ﬁle + 19 n, [32Hez 3.016049; 1on: 1.008665]. (2 points; show work)? = kMOSS .. My} balm} .- (MOLSS {W 044%) s (2. 9.011101 11 .— mteoqa u 490310195 ﬂ-‘ia’lwﬂ‘g c. A D—D reactor achieves a phenomenally long confinement time [I = 10 3. What value of the ion density is necessary to reach break—even, where the output energy equals the input (1 points)? Fov D-D, WC >10” g/«:mz ...
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