In Section 4, we analyze the system performance using the photocurrents
of the photodiodes to determine the signal to noise ratio (SNR) and the BER.
3]-ITO slides photocurrents
were measured in a three-electrode photoelectrochemical cell under irradiation with a Xenon lamp before and after modification with enediol ligands baring different pendant chemical groups.
Since maximum emission intensities give maximum photocurrents
at Diode Array detector, to sense these ones and control spectrum acquisition, we used the moment when the result of I derivate of photocurrents
' sum (determined by the integration of photocurrents
' sum [summation][I.
The scintillation light from the CsI detectors is converted to current signals using vacuum photodiodes (VPD), and the photocurrents
are converted to voltages and amplified by solid-state electronics .
Absorbed radiation generates two photocurrents
proportional to the wavelength of the incident light.
Analyzing the photocurrents
of the different segments gives the light spot position.
are measured in a standard three-electrode cell before and after surface modification.
However, the proportionality constant connecting the photocurrents
to the beam current may vary by a percent or more over an hour due to heating of optics, variations in the synchrotron beam position, etc.
The ratios of these photocurrents
as a function of the angular position of the movable electron spectrometer provided the data necessary to determine the polarization of the light.