Weekly update 07/15/11 Chris Nicholson Supervisor: Mike Albrow.

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Presentation transcript:

Weekly update 07/15/11 Chris Nicholson Supervisor: Mike Albrow

Goals from last week Finish L-bar construction (Visualisation of geometry with light rays) Run root analysis investigation of properties Analysis of time resolutions of test beam data (Pulse height analysis)

L-bar Construction 25mm long x 25mm high; 3mm x 3mm wide SiPM at top One question: is “sensitve detector” at same position as SiPM? Some graphical outputs suggest a problem…

Geant4 Basic Characterisation

Analysis Graphs Worries: a number of graphs are empty Many have only a few entries Runs very slowly compared with old code Is this really working?

Test Beam Analysis Graphs have x-axis in nanoseconds Compared resolution between all channels Reference channel is Photek 240 Sigma taken from data of 3sigma of full data range Distribution of time differences between channels 0 and 1. ± 3σ

Spreadsheet of time differences between channels Channels 6 and 7 are reference Photek 240?

Aims for next week Be able to look at arrival time vs. wavelength for all photons in Geant4 Start to optimise dimensions of bar Continue analysis of test beam data: tabulate time resolutions and run conditions