The faster the rotor spins, the further the degree of field distortion.
2.
To minimize sparking at the brushes due to this short-circuiting, the brushes are advanced a few degrees further yet, beyond the advance for field distortions.
3.
A dioptric focal reducer ( Maala ) was used at f / 7 to project a field of view almost one-degree wide on one of the CCDs ( a SITe 2048x4096 pixel array ) at the cost of slightly larger than optimal PSF sampling and some edge-of-field distortions.
4.
The advantages of GEMs, compared to multiwire proportional chambers, include : ease of manufacturing, since large-area GEMs can in principle be mass-produced, while wire chambers require labor-intensive and error-prone assembly; flexible geometry, both for the GEM and the readout pads; and suppression of positive ions, which was a source of field distortions in time-projection chambers operated at high rates.
5.
The positives cancel out the negatives; the huge e-field is gone, but the motion-distorted part of the field is still there . ( To get rid of the odd distortion, the positives and negatives would both have to flow along together, and in that case the electric current in the wire would be zero . ) We call this residual e-field distortion by the name " magnetic field . " However, there's another effect too : if you walk along at the same speed as the electrons in the wire, the distortion doesn't go away . . . since from your point of view the positive metal ions are now moving backwards, and they produce an electric current and a similar type of distortion .-- Wjbeaty 03 : 45, 26 June 2006 ( UTC)
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