1 MONALISA Compact Straightness Monitor Simulation and Calibration Week 8 Report By Patrick Gloster

2 MONALISA Compact Straightness Monitor Simulation and Calibration Week 8 Report By Patrick Gloster

3 3D!!!!!!!!!!!!!!!!!!!! 8 launch heads arrange in a cross 4 retroreflectors on plate 2 3 coordinates define the centre of plate 2 3 angles define the orientation

4 Two Stage Program Use a set of N plate 2 positions to calculate the positions of the launch heads on plate 1 Use these calculated positions to calculate the positions of any set of plate 2 positions Systematic error – depends on how good the initial calibration was

5 How many plate 2 positions do we need for good calibration? Experiment with different numbers of positions used to calculate the positions of the launch heads Find how many we need to get the best accuracy we can 400/500 looks good – 600  error – out of memory

6 Examine the accuracy we can expect with these calibrations Perform 50 different calibrations (using a different set of N plate 2 positions each time) For each calibration, calculate the positions of M other plate 2 positions Find the difference between the true and calculated values Plot histograms of the mean and standard deviation of these differences over all of the calibrations