Item #: SCP-128
Object Class: Euclid
Special Containment Procedures: SCP-128 is to be held in a windowless containment chamber with blast-proof doors and walls and a ventilation system that maintains Class 100 cleanroom conditions inside. The interior of the containment chamber is to be monitored remotely by cameras welded in place with protective grating. The speakers and laser monitoring system must be similarly welded into place and protected with grating. The entry to SCP-128's containment chamber must include an antechamber with a second locked door that cannot be viewed from the chamber door.
Personnel entering the test chamber for any reason must wear ballistic armor and must not bring any loose item inside the chamber. All required equipment must be rigidly mounted to the armor. Interference with the laser monitoring system or the central wheel is forbidden unless required for maintenance.
In the center of the containment chamber, a wheel must be mounted to a concrete pedestal and allowed to spin freely. Should the wheel be measured to spin at less than 4,000 rpm at any time, all personnel are required to evacuate the containment chamber and foam nozzles will be deployed.
ARCHIVED CONTAINMENT PROCEDURES - FOR LOG PURPOSES ONLY
Description: SCP-128 is an immaterial source of kinetic energy which can be conferred upon any nonliving solid material within line of sight of the source. The source itself is motile, with a tendency to remain along the walls or at the central wheel of the containment chamber. The line of sight is blocked by any opaque material, including lead, steel, or even single sheets of paper, but not transparent materials such as ballistic glass. Opaque radiolucent materials will contain SCP-128's range of effect, suggesting that transmission of energy occurs at visible light wavelengths, but darkness does not prevent transmission of kinetic energy.
Any loose nonliving materials within line of sight of SCP-128 are at risk of anomalous propulsion to hazardous velocities. Items under 100 g in mass have been observed to accelerate to velocities of up to 900 m/s in a period of 0.1 second, similar in force to machine gun fire. Analysis of the mass and velocity of every object undergoing acceleration indicates that the system of affected objects contains a constant linear momentum of 2,500 kg m/s, anomalously unconstrained by direction. It is therefore advisable to have many heavier items available to the object instead of fewer, lighter items.
Despite SCP-128's invisible, immaterial form, it has been determined that the entity cannot be compressed into a space under a 2 cm radius sphere. Such compression with opaque materials, however, is not advised, as dust particles within the space will be excited, generating extreme heat, potentially rupturing the compression container explosively.
SCP-128 arbitrarily chooses which items to accelerate, with a slight statistical preference for new objects over older ones. Despite the existence of some form of acceleration choosing, tests do not indicate an active sentience directing the choice, with one exception. The object does not accelerate "living" material, with its own parameters regarding what is considered "living." People or robots moving of their own accord are not accelerated, nor is any part that is rigidly attached. Dead or unconscious people and animals are also not accelerated. Unmoving but conscious test subjects report a light "tugging" in the presence of SCP-128, which immediately stops at the first sign of movement or animal-like characteristics. Plants and fungi, alive or dead, are similarly not accelerated. Unpowered robots, however, are susceptible to acceleration.
