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Additional resources for Astroparticle, Particle And Space Physics, Detectors And Medical Physics Applications (Proceedings of the 9th Italian Conference)
The typical rate of ion feedback is 10~ 3 , much less than the specification of < 1 0 - 2 . HPD 4 1 300 400 Gat» delay [ns] Figure 3. Rate of ion feedback events as function of delay with respect to the primary photoelectron Figure 4. A typical backpulse spectrum of signals of photoelectrons hitting the silicon. 5. Photoelectron detection efficiency The photoelectron detection efficiency is defined as the probability of a photoelectron, which is converted at the photocathode, being detected as a photon hit by the binary readout electronics.
The desired vacuum is obtained in less than 24 hours by three vacuum pumps (scroll, molecular and cryogenic). The Csl powder is heated at 500 °C by four crucibles evaporates toward the pad plane. A quantum efficiency (QE) online measurement system 7 has been integrated into the evaporation chamber. An UV light generated by a deuterium lamp is directed on the evaporated pad passing through one of three wavelength filters (160, 180 and 220 nm). A small wire chamber at 2 mm from the pad collects the photoemitted electrons, whose current (few nA) is measured by a picoamperometer.
1. Introduction A proximity focusing RICH has been designed, built and operated in the first hypernuclear spectroscopy experiment (E94-107) performed in Hall A at the Jefferson Laboratory in 2004 and 2005. The Hall A is dedicated to high resolution and high luminosity electron scattering experiments, served by a continuous electron beam with energy up to 6 GeV. It is equipped with two identical, Quadrupole-QuadruploDipole-Quadrupole High Resolution Spectrometers 1 that accept particle momenta up to 4 GeV/c.
Astroparticle, Particle And Space Physics, Detectors And Medical Physics Applications (Proceedings of the 9th Italian Conference) by Michele Barone, Emilio Borchi, Andrea Gaddi, Claude Leroy, Larry Price, Pier-Giorgio Rancoita, Randal Ruchti