Quantum efficiency enhancement in CsI/metal photocathodes
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چکیده
منابع مشابه
Quantum efficiency and stability of alkali halide UV photocathodes in the presence of electric field
It was shown previously that CsI sensitivity can be substantially reduced by intense UV irradiation. In the present study we measure the influence of negative and positive electric fields on the degradation of CsI photocathode sensitivity when it is subject to a large dose UV irradiation. The UV sensitivity of positively biased CsI photocathodes did not decay as fast as in case of negatively bi...
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We present the result of a systematic investigation of the quantum efficiency of reflective CsI photocathodes to the spectral range 140-220 nm . Powder and crystal forms of CsI were used for evaporation of bulk and porous photocathodes . The measurements were made without gaseous amplification m vacuum and in methane. The results of radiation resistance measurements at doses reaching 4500 Gy ar...
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We have studied the UV sensitivity degradation of CsI and KBr thin films under UV illumination and the stability of their visible light rejection for CsI and KBr opaque photocathodes evaporated on microchannel plates. For both materials the greatest degradation of the relative quantum detection efficiency (QDE) was observed near the photocathode sensitivity cut off, while there was almost no ch...
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We studied variation of quantum efficiencies of CsI, KBr and KI-evaporated reflective planar photocathodes with the angle of radiation incidence (±55 degrees) in the spectral range of 25-115 nm. The photocurrent increases with the photon incidence angle for short wavelengths (by as much as ~60% at 55 for 25-30 nm illumination), while it changes only ~5% at wavelengths ~90-115 nm. The theoretica...
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ژورنال
عنوان ژورنال: Chemical Physics Letters
سال: 2015
ISSN: 0009-2614
DOI: 10.1016/j.cplett.2015.01.010