Kalman Filter Update 2

As noted in my previous post, I have now updated my filter to store the slope of the particle’s path in the y-z plane (this is the plane in which the magnet will bend the particle’s path) instead of the angle at which it is travelling. This allows for better accuracy in tracking the particle. I was able to finish applying this to the magnet-off data sample (as the name implies, the magnet was turned off, so that the particle should just travel in a straight line) and obtained good agreement between data and prediction.

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Kalman Filter Stage 1

My direction of research has changed slightly since the start of summer. My new goal is to apply a Kalman filter to the MINERvA testbeam. One of the purposes of this testbeam is to determine the momenta of the incoming particles, which is accomplished by setting up a pairs of wire chambers before and after a magnet. These pairs of wire chambers enable us to determine the direction of the particle’s motion before and after passage through the magnetic field, and, from this change in direction, we can determine the particle’s momentum. However, the wire chambers have some degree of error in determining the particle’s position which translates to errors in the particle’s direction and momentum.

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