I am trying to use this raycast for creating some kind of laser in my space game. But it is not working, what do i have to correct?

 if (Physics.Raycast(transform.position, new Vector3(transform.position.z - Aim.position.x,
transform.position.y - Aim.position.y,
transform.position.z - Aim.position.z), out hit,200))
                  {

                       Debug.DrawLine(transform.position, hit.point, Color.green, 1, false);
                       try
                       {

                     hit.collider.gameObject.GetComponent<Energy>().power -=3;
                       } catch
                       {
                       }
                            try
                       {
                       hit.collider.gameObject.GetComponent<health>().hp-=1;
                       }
                       catch
                       {
                       }


                   }