Radiation devices

A radiation device, comprising:

• a body including a threaded portion configured to engage with a threaded opening in an engine;
• a ground electrode coupled to the body;
• a first input connected to the ground electrode, the first input configured to receive a direct current voltage configured to generate a spark between the body and the ground electrode;
• and
• a second input configured to receive an input signal, the second input configured to, in response to the input signal, generate a plasma energy between the body and the ground electrode.

A method, comprising:

• coupling a ground electrode to a body, the body including a threaded portion configured to engage with a threaded opening in an engine;
• connecting a first input to the ground electrode, the first input configured to receive a direct current voltage and, in response to the direct current voltage, generate a spark between the body and the ground electrode;
• and
• connecting a second input to the ground electrode, the second input configured to receive an input signal configured to generate a plasma energy between the body and the ground electrode.