WAFACWide-Angle Free-Air Chamber (physics)
WAFACWater Forces Analysis Capability
WAFACWestern Australian Fishing and Aquaculture Centre
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References in periodicals archive ?
In the direction of the WAFAC there is a 1.3 cm thick, 1.22 m wide, and 2.44 m tall aluminum barrier, lined on the seed side from about 1.0 m to 2.1 m from the floor with 2 mm of Pb.
Corrections for the recombination of ions and electrons before they are collected in the WAFAC were determined using multiple-voltage-extrapolation methods described in Lamperti et al.
Then the expected ionization current in the WAFAC can be evaluated approximately as
For example, for the effects of attenuation of the primary beam in the air path from the aperture plane through the WAFAC volume, the last terms in both [b.sub.1] and [b.sub.2] are set to zero so that [b'.sub.1] = [[mu].sub.air]([E.sub.j])[z.sub.air] + [[mu].sub.A1]([E.sub.j])[z.sub.A1] and [b'.sub.2] = [b'.sub.1].
Note that the effects of external scatter are much smaller than predicted by the usual build-up factors for air because of the partial shielding between the source and the WAFAC.
The contributions to uncertainty in the determination of the air-kerma strength with the WAFAC for the remainder of the components have been estimated and are given in Table 7, to be effective 1 January 2004.
Differences between the Loftus [11] standard and the WAFAC standard are pertinent only for the 6702 and 6711 [.sup.125]I seeds that are common to both measurements.