If they’d been able to put out a slightly different frequency the day before—one that penetrated the atmosphere more efficiently—the thermal blooming might have been reduced by fifty percent or so. But that meant controlling the superconducting magnets better. They were called wigglers because they induced an oscillating magnetic field through the charged electrons in the lasing cavity. Unfortunately, the breakthrough that made the lasing cavity larger had also had an unexpected effect on their ability to control magnetic-field flux.
