X-ray and charged particle detection with CsI(Tl) layer coupled to a Si:H photodiode layers

Amorphous silicon based radiation detectors

“…In general it has been shown that the main loss is due to decrease of light transmission through the bulk of a crystal. We confirmed this by measuring the signal decrease for a Csi(H) crystal and an evapor-· ated layer 300 11m thick and we show that the thin layer has a radiation resistance -100 higher than a 1 em crystal (12). We measured the signal produced by electrons (MIPs) from a Sr-92 beta source as shown in Fig (8).…”

Amorphous silicon pixel layers with cesium iodide converters for medical radiography

“…The deposition rate and substrate temperature were found to be factors which affect the signal yield from Csl layer [5]. The high light yield was obtained at a low deposition rate <3 J..Lm/min and a substrate temperature of 1 OOCO-JSOCO.…”

“…In recent years, our group has begun to study the use of a new silicon alloy, hydrogenated amorphous silicon (a-Si:H), as a radiation detector [4][5][6], which has the merit of good radiation hardness due to its random structure and can be fabricated in large area inexpensively. A matrix of position-sensitive a-Si:H pixels in conjunction with an array of thin film transistor (TFT) amplifiers and readout electronics (Fig.1) may be considered as an alternative to detect radiation imaging with better spatial resolution, large sensitive area and lower cost than conventional devices.…”

Direct digital mammography image acquisition

“…This channeled-scintillator has good light emission and spectral match to (a-Si:H) photodiodes and offers high DQE(0) combined with good spatial resolution [44]. These properties, which are essential for good image quality, arise from the columnar structure of CsI:Tl layers, when grown by evaporated deposition at high temperature.…”