Figure 1: Schematic illustration of the experimental approach. | Nature Communications

Figure 1: Schematic illustration of the experimental approach.

From: Using light transmission to watch hydrogen diffuse

Figure 1

Monochromatic light, emitted by a light-emitting diode, shines on a semitransparent mirror, which is used to split the beam allowing simultaneous measurements of the transmission through the sample and the intensity of the source. A diffusor is used to homogenize the illumination, before the entry window of the ultrahigh vacuum chamber. The transmitted light is registered by a CCD camera. The sample is covered with Al2O3 to prevent hydrogen from entering and leaving, except for a small region at one end of the sample.

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