Bruce Cahan

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 electronic system developed for the SpaCal lead/scintillating-fibre calorimeters of the H1 detector in operation at the HERA ep collider is described in detail and the performance achieved during H1 data-taking is presented. The 10 MHz bunch crossing rate of HERA puts severe constraints on the requirements of the electronics. The energy and time readout(More)
We implemented a low noise current preamplifier for the readout of resistive bolometers. We tested the apparatus on thermometer resistances ranging from 10 Ω to 500 MΩ. The use of current preamplifier overcomes constraints introduced by the readout time constant due to the thermometer resistance and the input capacitance. Using cold JFETs, this preamplifier(More)
The measurement of intensity offers a means of obtaining faster ellipsometric readings than are possible by manual nulling techniques. An analysis of the theoretical intensity relations gives rise to a technique of separately determining the changes in Delta and psi by the use of successive transients. An experimental verification of the technique for the(More)
  • 1