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RICH Run 2 performance paper

Here we will list the progress towards a RICH performance paper for Run 2

General structure

We need to talk about the things that go into the PID, i.e. resolutions, photon yields, calibrations and alignments, then give the PID performance.

Available tasks

Overview Description Time estimate People
Resolutions Conceptually simple (a gaussian peak with a background), the tricky part is dealing with the background. This could be reduced by working with low occupancy events, e.g. the low multi dimuon line, which is pretty clean. An example is here: . The difference between a flat background and a quadratic would give a systematic of 2-3%. Would hope to improve that, but maybe we just live with it. Even so relative studies can still be done, comparing the resolutions in different running conditions, for different sections of the detect, as a function of time, etc.    
Photon counting This often gets stuck in definitions of which tracks matter and what a yield is. We can pick a definition... Also there has been some success in using a a background subtraction rather than assuming a signal shape. Similar to the resolutions, relative studies can be done in space, time and conditions.    
Calibration Studies of refractive index stability, etc. Time alignments. HPD image movements. Studies of the MDCS corrections? Mirror alignments are getting their own paper, so maybe nothing needed here?    
PID performance Reuse the framework Iwan created. Again, stability in time and with conditions    

Drafts and presentations

Something something overleaf

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Topic revision: r2 - 2019-02-12 - MichaelMcCann
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