Fig. 3: Transverse emittance change measured by MICE.
From: Transverse emittance reduction in muon beams by ionization cooling
Emittance change between the TKU and TKD reference planes, Δε⊥, as a function of emittance at TKU for 140 MeV c–1 beams crossing the LiH (top) and LH2 (bottom) MICE absorbers. Results for the empty cases, namely, No absorber and Empty LH2, are also shown. The measured effect is shown in blue, whereas the simulation is shown in red. The corresponding semitransparent bands represent the estimated total standard error. The error bars indicate the statistical error and for some of the points, they are smaller than the markers. The solid lines represent the approximate theoretical model defined by equation (10) (Methods) for the absorber (light blue) and empty (light pink) cases. The dashed grey horizontal lines indicate a scenario where no emittance change occurs.
