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In biology and medicine research, detection and identification of cancer cells plays an essential role to further analysis of cell properties and developing new drugs experiments. However, owing to the adhesion among cells and great changes in morphology, it is a very challenging task to detect and locate the cells accurately, especially for the cells adhesion area. In this work, a deep detector for...
This paper presents our work on a 8-channel low noise Front-End electronic coupled to a Liquid Argon (LAr) TPC (Time Projection Chamber). Each channel consists of a Charge Sensitive Amplifier (CSA), a band pass filter and a 50 Ohms buffer as line driver. A serial link based on a `i2c-like' protocol, provides multiple configuration features to the circuit by accessing slow control registers. Only the...
A very-front-end electronics dedicated to high granularity calorimeters has been designed and its performance measured. This electronics performs the amplification of the charge delivered by the detector thanks to a low-noise Charge Sensitive Amplifier. The dynamic range is improved using a bandpass filter based on a gated integrator. Studying its weighting function, we show that this filter is more...
For multi-phase flow in pipelines, the distributions of the individual phases are of significant importance. For this reason a low-energy gamma-ray tomography system has been designed. The set-up uses a 241Am source along with a CdZnTe array to acquire gamma ray attenuation data in different positions of a cross-section plane around a test pipe. A charge sensitive amplifier (CSA) and a fourth-order...
A 160 channel read-out circuit aimed for a large energy-resolved photon-counting X-ray pixel detector has been designed. The high number of channels combined with high speed and noise performance requires very low power consumption and small footprint of the analog channel. We describe the design of the analog channel, aimed for a detector capacitance of 3-5pF and with a target ENC of 300 electrons...
The Krummenacher feedback circuit is a well know and often used in charge sensitive amplifiers (CSA) connected to DC-coupled semiconductor detectors. The circuit provides in a very simple structure dual functionality: continuous reset and detector leakage current compensation. In spite of the simplicity the characterization of the circuit for high speed applications is not very straightforward. This...
This paper presents the design of a low-noise multi-channel front-end readout chip integrated with a high-resolution TDC. It is foreseen to be used as front-end readout electronics of Avalanche Photo Diodes (APD) dedicated to a small animal Positron Emission Tomography (PET) system. The architecture of the chip is depicted. Two prototype chips, a ten-channel front-end chip and a three-channel high-resolution...
This paper presents initial results from electrical, spectroscopic and ion beam induced charge (IBIC) characterisation of a novel silicon PIN detector, featuring an on-chip n -channel JFET and matched feedback capacitor integrated on its p-side (frontside). This structure reduces electronic noise by minimising stray capacitance and enables highly efficient optical coupling between the detector back-side...
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