The phrase "a powerful trigger" is correct and usable in written English.
It can be used to describe something that has a strong effect or influence on a person's emotions, thoughts, or actions.
Example: "The movie served as a powerful trigger for her memories of childhood."
Alternatives: "a strong catalyst" or "a significant prompt".
Research by the psychologist Jonathan Haidt, for instance, suggests that disgust is a powerful trigger for moral condemnation — being grossed out makes us mean — even if we are disgusted for reasons that have nothing to do with the person or act we are judging.
This suggested to the researchers that kisspeptin is a powerful trigger for the chemical cascade that drives puberty.
The smell of smoke can be a powerful trigger.
"In our culture, we're tough on sadness, but it's a powerful trigger for seeking comfort and bonding," Keltner says.
Selective COX-1 inhibition such as the one produced by low-dose aspirin has been shown to have an antithrombotic effect mediated by a relatively specific, potent, and irreversible inhibition of platelet COX-1, which reduces thromboxane A2 biosynthesis, a powerful trigger of platelet aggregation [19].
As is well known, TNFα is a powerful trigger of reactive changes in astrocytes [ 19].
Smell, as Marcel Proust knew and recent research confirms, can be a peculiarly powerful trigger for memories.
Obesity is also a more powerful trigger for chronic health problems than either smoking or heavy drinking, according to research by Roland Sturm, a senior economist at the RAND Corporation.
Jealousy in men is primarily triggered by sexual infidelity, whereas emotional infidelity is a more powerful trigger for women.
For British film fans, the Oscars are a powerful nostalgia trigger.
This paper describes the use of a custom off the shelf FPGA board with a collection of custom interface boards to produce a powerful custom trigger system.
