D. J. F. Walker

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
The addition of O 2 to gas mixtures in time projection chambers containing CS 2 has recently been shown to produce multiple negative ions that travel at slightly different velocities. This allows a measurement of the absolute position of ionis-ing events in the z (drift) direction. In this work, we apply the z-fiducialization technique to a directional dark(More)
This paper presents a system currently being developed for reliably recognising objects in a random orientation at video rates. The system uses an optical processor to produce the power spectrum on a CCD sensor and specialised digital hardware to sample the CCD output in the desired wedge ring geometry. The resulting system has a high throughput and at a(More)
  • 1