Langston Field - Expanding Langston Field

Expanding Langston Field

In the novel The Mote in God's Eye, the Moties did not realize that the Langston Field was possible until humans demonstrated it. The Moties were inconceivably superior to humanity in the development of existing technologies, but lacked the ability (or perhaps the inclination) to carry out primary research. Even if they had had the ability, however, it is possible that they would never have developed Langston Field technology; for Humanity it was a purely accidental discovery which did not result from a natural progression of research. Nonetheless, Motie Watchmakers proved able to repair, maintain, and even improve it.

When a human starship was infested by Watchmakers, every one of the ship's systems was modified and enhanced. The most notable improvement was to the Field generator, which produced a Field which expanded as it absorbed energy. This produces more surface area to disperse absorbed energy, and when the ship was attacked, the Field expanded to many times its original size, increasing in diameter as increasing firepower was brought to bear. Only when the field expanded almost too far for it to be generated at all did it stop expanding, allowing it to be overloaded, a process that still took many times more firepower than would have previously been necessary.

Almost as soon as human vessels with operating Fields jumped into the Mote system, Motie engineers were aware of the Field's existence and quickly built Fields of their own. Motie engineers are incredibly effective at building and using tools, but they display a rather marked lack of original thinking and creativity, which may partly explain why they never developed the Field in the first place. Given that an expanding Field is obviously far more effective at protecting a ship than a static one, all Motie Field generators were designed to expand as necessary.

Though this would have made Motie starships incredibly formidable in combat, the expanding Field actually proved fatal to Motie ships that left their system. The endpoint of the original Alderson point in the Mote system opens within the photosphere of Murcheson's Eye, a red giant star. Survival in such a hostile environment requires a Langston Field, but in this case, an expanding Field is counterproductive. While inside a star, the Field has no opportunity to radiate heat, as it is constantly absorbing heat from all directions. A standard, static field will absorb heat at a fixed rate and will eventually overheat and explode if the ship does not leave the star regularly, but the absorption is slow enough to allow any ship with such a Field to survive for many hours before needing to exit the star to cool off. Unlike in normal space where extra surface area means extra radiated heat, inside a star increased surface area radically increases the rate at which heat is absorbed, causing a ship with an expanding Field to explode within minutes. Often this occurs before the Moties onboard recover from the side effects of traversing the Alderson tramline.