Results 251 to 260 of about 2,462,392 (296)
Some of the next articles are maybe not open access.
On the reduction of the dark current in photomultipliers
Acta Physica Academiae Scientiarum Hungaricae, 1955In the present paper the question of the reduction of the rate of dark current pulses in photomultipliers is discussed. The author’s aim was to develop new methods for the reduction of the dark current pulse rate of multipliers commercially available, thus replacing wholly or partly cooling which up to now has been generally used.
openaire +1 more source
2020
Characterization of the LW10 devices showed the presence of four main sources of dark current: diffusion, generation-recombination, band-to-band tunneling, and trap-to-band tunneling dark current.
openaire +1 more source
Characterization of the LW10 devices showed the presence of four main sources of dark current: diffusion, generation-recombination, band-to-band tunneling, and trap-to-band tunneling dark current.
openaire +1 more source
Dark Current-Voltage Characterization
2021Silicon solar cell is a large area diode. Its conversion efficiency is a function of its material (lifetime, diffusion, passivation) and optical (internal scattering, absorption) properties. Dark current-voltage (I-V) response determines electrical performance of the solar cell by providing reliable and accurate information regarding its series and ...
openaire +1 more source
Dark current transport in the FLASH linac
2007 IEEE Particle Accelerator Conference (PAC), 2007The free electron laser facility FLASH at DESY Hamburg operates a low-emittance photoinjector and several acceleration modules with superconducting cavities to produce a high quality electron beam of up to 700 MeV. Since few months, the accelerator is routinely operated with its design RF pulse length of 800 mus instead of the prior length of 70-200 ...
openaire +2 more sources
Dark Current in Photomultipliers
IRE Transactions on Nuclear Science, 1960A study has been undertaken to determine the nature of the processes that contribute to dark current in photomultipliers. Extensive measurements have been made on a number of production-type photomultipliers and on a series of experimental tubes that were designed to minimize leakage and regeneration.
openaire +1 more source
The impact of dark current on the wideband Poisson channel
2014 IEEE International Symposium on Information Theory, 2014We study the discrete-time Poisson channel under the constraint that its average input power (in photons per channel use) must not exceed some constant E.W e consider the wideband, high-photon-efficiency extreme where E approaches zero, and where the channel's "dark current" approaches zero proportionally with E.E xtending our previous work, we show ...
Ligong Wang 0002, Gregory W. Wornell
openaire +1 more source
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015
Abstract A model of dark current generation in the photocathode radio-frequency (RF) gun is established in the Thomson scattering X-ray source, and dark current transport and losses along the beamline are simulated. A velocity bunching cavity is added between the RF gun and the first linac to achieve the longitudinal compression of the photoelectron ...
Lianmin Zheng +3 more
openaire +1 more source
Abstract A model of dark current generation in the photocathode radio-frequency (RF) gun is established in the Thomson scattering X-ray source, and dark current transport and losses along the beamline are simulated. A velocity bunching cavity is added between the RF gun and the first linac to achieve the longitudinal compression of the photoelectron ...
Lianmin Zheng +3 more
openaire +1 more source
2015
The dark current density in any minority carrier detector architecture is determined by the thermal generation rate per unit volume, Jd ¼ qGtht ¼ qNmint/t, where Nmin is the equilibrium density of minority carriers in the detector volume under consideration, and t is the associated minority carrier lifetime.
openaire +1 more source
The dark current density in any minority carrier detector architecture is determined by the thermal generation rate per unit volume, Jd ¼ qGtht ¼ qNmint/t, where Nmin is the equilibrium density of minority carriers in the detector volume under consideration, and t is the associated minority carrier lifetime.
openaire +1 more source
Annalen der Physik, 2006
Abstract The observed recent accelerated expansion of the Universe constitutes a dramatic departure from traditional views. The mechanism behind this accelerated expansion is still mysterious and is a major challenge to present‐day cosmology.
openaire +2 more sources
Abstract The observed recent accelerated expansion of the Universe constitutes a dramatic departure from traditional views. The mechanism behind this accelerated expansion is still mysterious and is a major challenge to present‐day cosmology.
openaire +2 more sources
Dark current analysis of InSb photodiodes
Infrared Physics, 1984Abstract We report on low dark current InSb photodiodes with mesa structures in which bulk g-r plus shunt resistance are the dominant current mechanisms up to approx. 700 mV reverse bias. Tunneling current dominates for large reverse bias, and bulk diffusion current dominates for forward bias > 15 mV.
F.K. Hopkins, J.T. Boyd
openaire +1 more source