AIM Jammer

The AIM Jammer (AIMジャマー) is an anti-esper technology. It is a device that dissolves an esper's concentration in an attempt to weaken them. Along with 27 other types of anti-esper technology, the AIM Jammer is used in the Reformatory.

Principles
The technology works by dissolving an esper's concentration and intentionally leaves them with thoughts that make them more easily tracked by a Psychometer. It’ll weaken the esper a bit, but not enough to eliminate their power completely. However in these conditions it is also possible for it to cause an esper's powers to go out of control. Powers that use complex calculations are especially prone to this like those of Accelerator's ability and Musujime Awaki's Move Point.

A normal esper would end up just being injured, but it would be extremely dangerous if this happened to more powerful espers. This is exemplified with Awaki's foot once again being stuck in a wall when she tried to use her teleport powers. Indeed, the closer the proximity the esper is to the machinery, the more painful it is to them without even using their powers. The pain described by both Accelerator and Awaki is that of a headache. Even weak espers like Tsuchimikado Motoharu can feel it if they are close enough.

Reformatory
The Reformatory has anti-esper equipment installed all throughout its facility. The AIM Jammers there are seen as a number of thin wires stretched out between the almost 15 meter walls covering the entire facility. The deeper in the facility, the stronger the AIM Jammer. They emit a special electromagnetic wave to diffusely reflect an esper’s AIM diffusion field causing the esper to interfere with his own power. The device likely needed a lot of power and processing power, which is the reason why Anti-Skill does not make use of the technology as it could only be used in a limited area.

Shiokishi
Shiokishi of the Academy City Board of Directors utilizes a powerful anti-esper technology in his base. At the top of his circular shelter is a metal sphere like a basketball that's like an omnidirectional radar that disrupts the AIM diffusion fields of an esper. As his base has a dome, the main body of the device is likely part of the dome. According to Accelerator, the one that Shiokishi uses is a special one that uses a reverse calculation of a target esper's AIM diffusion field to send out specialized disruptive electrical waves. With that, the device could at least force the abilities of powerful espers, specifically that of Musujime Awaki, to go berserk and even redirect them.