By Daniel Clery

ISBN-10: 1468310410

ISBN-13: 9781468310412

Our quickly industrializing international has an insatiable starvation for strength, yet traditional assets are operating out. the answer, says Daniel Clery during this deeply revelatory e-book, is to be present in the unique strength resource: the sunlight itself. There, at its middle, the fusion of 620 million a whole bunch hydrogen each moment generates an unfathomable quantity of power. through replicating even a tiny piece of the Sun's strength in the world, we will be able to safe the entire warmth and effort we'd ever desire. the straightforward but outstanding ambition of nuclear-fusion scientists has garnered many skeptics, yet, as A Piece of the Sun makes transparent, large-scale nuclear fusion is scientifically possible—and even perhaps optimum to different thoughts. Clery argues passionately and eloquently that the one factor retaining us from harnessing this affordable, fresh and renewable strength is our personal shortsightedness.

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Extra info for A Piece of the Sun: The Quest for Fusion Energy

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R------ La LO Fig. 23. Solar spectral irradiance above the Earth's atmosphere at the Earth's mean distance from the sun [36] essentially the total radiation environment. 3 and 4 microns, with a mere 1 % lying outside [34, 35]. Figure 23 shows the spectral irradiance over part of this wavelength range. Over this range, the curve may be approximated by 6000 K blackbody radiation. The total solar irradiance, at the earth's mean distance from the sun, is termed the solar constant. Experimental determinations [36] yield values ranging from 1362 to 1367 W 1m; where the spread appears to be primarily due to errors rather than to solar total flux changes.

32. The total m agne tic field calculated for an altitude of 400 km. over the northern hemis phere [76J EShunt. ",itph... " c:::::J 0. Zl ~ Fig. 33. Absolute value of the V x'B electric field induced on a body in a 90 0 inclination orbit ove r the northern hemisphere , at 400 km altitude , using the B field model of Figure 32 [76J Chapter 1 35 comparable to that due to radiation pressure and to the "Coulomb" drag, the latter resulting from the electrostatic floating charge on the spacecraft relative to the plasma directly interacting with the ionized particles.

Measured electron densities around the Shuttle show a drop from 10 7 cm - 3 on the ram surface to 10 3 cm- 3 in the wake [70]. Complex plasma phenomena are observed in this wake region [71], including ion streams, rarefaction waves and plasma instabilities. Broadband electrostatic noise is observed [72] as a 32 Chapter I result of such phenomena over a frequency range 30 - 300 Hz, with peak spectral 1 density of 80 dBIlV /M/Hz2. The ions and electrons of the thermosphere together constitute the ionospheric plasma; their concentrations being driven by solar EUV and X-ray radiation induced photoionization of the neutral constituents, together with contributions from magnetospheric particle interactions at high latitudes.

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A Piece of the Sun: The Quest for Fusion Energy by Daniel Clery


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