A New Visualization Tool for Simulations of Black Holes and Neutron Stars

LIGO has an input mode cleaner, which is a 3 mirror resonant cavity. It is designed to let pass through only 1064 nm TEM00 light out of all the frequencies and modes emitted by the Pre-Stabilised Laser. This design involves the position as well as the alignment of the mirrors. Hence, a potential problem becomes to sustain a particular length and alignment of the cavity, given all the disturbances tend to mis-align the cabity. The scheme for the length alignment (PDH) is there, we aim at now improvising on the alignment part. The Wavefront Sensing Scheme has essentially been devised for the same. Here, a dynamic feedback control system is designed, to look at WFS/QPD signals coming from lights containing information of the MC, and send it as a feedback to the actuators to the mirrors. We particularly look at the light reected from the input mirror of the MC, and at light leaked out from the curved mirror. This gives us 6 signals for 6 rotational dof. The final goal will be to try and diagonalise this 6*6 alignment sensing matrix.