Winds NNE at 9 mph (14.5 kph). The overnight low will be 41 Â°F (5.0 Â°C).Cloudy with a high of 62 Â°F (16.7 Â°C). Winds variable at 9 to 11 mph (14.5 to 17.7 kph). 50%58Â°47Â°Rain today with a high of 58 Â°F (14.4 Â°C) and a low of 47 Â°F (8.3 Â°C). There is a 50% chance of precipitation.
The amount of filtration of the x-ray beam is specified by and based on the voltage potential (keV) used to produce the beam. The thickness of filter materials is dependent on atomic numbers, kilovoltage settings, and the desired filtration factor.
Laboratory powder diffraction requires an X-ray source that is essentially monochromatic and so the KÎ² line in the X-ray spectrum needs to be removed. Metal foil filters are one way of achieving this. The photograph shows the typical metals used to filter X-rays produced by a sealed X-ray tube, i.e.