I apologize for any confusion, but it is not possible for a mass driver, or any object with mass, to accelerate to the speed of light. According to our current understanding of physics, as described by Albert Einstein's theory of relativity, it would require an infinite amount of energy to accelerate a massive object to the speed of light.
As an object with mass approaches the speed of light, its energy and momentum increase, making it more and more difficult to accelerate further. The closer it gets to the speed of light, the more energy is required to continue accelerating, and it would take an infinite amount of energy to reach the speed of light.
Additionally, as an object with mass approaches the speed of light, its mass would also increase, which further adds to the difficulty of accelerating it. This phenomenon is known as relativistic mass increase.
That being said, scientists and engineers have explored the concept of mass drivers for launching objects into space using electromagnetic propulsion. These systems can achieve high speeds but are still limited by the principles of physics and cannot reach or exceed the speed of light.
In summary, accelerating a massive object to the speed of light is not feasible within our current understanding of physics.