SOLEIL diffusion. SOLEIL contains electrons travelling with an energy of 2.75 GeV around a 354 m circumference. It takes the electrons 1.2 μs to travel around this ring at almost the speed of light; 847,000 times per second. SOLEIL SOLEIL ("Sun" in French) is a synchrotron facility near Paris, France. It performed its first acceleration of electrons on May 14, 2006. The name "SOLEIL" is a backronym for "Source optimisée de lumière d’énergie intermédiaire du LURE" (LURE optimised intermediary energy light source), LURE meaning "Laboratoire pour l'utilisation du rayonnement électromagnétique". The facility is run by a civil corporation held by the
Cité Soleil force. During the mid-1990s, the city's population was terrorized by armed gangs which drove the local police out; this situation prevented officials aid workers from intervening to provide help. In 1999, Cité Soleil was set on fire by a gang and at least 50 shacks were burned. By 2002, the violence escalated as the gangs began warring with each other in addition to preying on ordinary people. Many inhabitants had temporarily left to escape the turmoil. In a series of operations from 2004 to 2007, UN peacekeepers tried to seize control from the gangs in Cité Soleil and end the