A Czech monk in the 17th century discovered an alloy that act as an antenna to focus his psychic powers. Unfortunately, a nickel isotope needed for the process no longer exists in useable quantities. Through careful nuclear manipulation it can be “built” from standard nickel but the process is very expensive.
In the late 60s, agents of an unknown organization successfully modified the alloy to absorb and disburse psychic energy. Particles of this material dissolved in saline and injected into a psychic, act as a mild, slightly addictive sedative and completely inhibit psychic powers. Continued treatments with the solution can permanently damage psychic abilities. A sample of the material, Synaptrol™, has been retrieved by Department 7 and reverse engineered. Solely for technical insight, of course.