Emu Flypast Performance in Dilution Fridge
19 Sep 2011
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We have been testing the dilution fridge in flypast to enable small samples to be measured.

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​Demonstration of flypast for EMU with Cu samples at 40K for different sample sizes.
 

Initial test results are shown in the figure which show a Kubo-Toyabe (KT) signal from a copper plate at 40K. We have three sample sizes, a full 50x50mm sample plate which fills the entire beam. a 7x7mm sample and a 4x4mm sample. For the smaller samples a constant background has been removed and the standard KT behaviour is observed. There is a slightly reduced asymmetry for small samples due to muons stopping in the rear detector ring, however this ring can be removed from the data analysis as required.

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