New results on DEPFET pixel detectors for radiation imaging and high energy particle detection
New results on DEPFET pixel detectors for radiation imaging and high energy particle detection
复制标题
用于辐射成像和高能粒子检测的 DEPFET 像素探测器的新结果
DOI：
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发表时间：
2003
期刊：
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通讯作者：
J. Treis
中科院分区：
文献类型：
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作者：
N. Wermes;L. Andricek;P. Fischer;M. Harter;S. Herrmann;M. Karagounis;R. Kohrs;H. Kruger;G. Lutz;P. Lechner;I. Perić;M. Porro;R. Richter;H. Soltau;L. Struder;M. Trimpl;J. Ulrici;J. Treis
DEPFET像素检测器在能量和空间分辨率方面是独特的器件，因为可以通过在像素单元本身中实现放大晶体管来获得非常低的噪声（在室温下ENC = 2.2e）操作。全DEPFET像素矩阵已建成和操作的放射自显影成像与成像分辨率为4.3 /spl plusmn/ 0.7 lp/mm在22 keV。对于低能X射线天文学的应用，DEPFET探测器的高能量分辨率具有吸引力。对于粒子物理学，DEPFET像素作为具有高空间分辨率的低材料探测器是有趣的。对于线性对撞机探测器，读出必须非常快。新的读出芯片已被设计和生产的DEPFET模块的像素检测器的发展，在拟议的TESLA对撞机（520 /spl倍/ 4000像素）与50 MHz的线速率和25 kHz的帧速率。该电路包含电流存储器单元和电流命中扫描器，用于快速基座减法和稀疏读出。本文介绍了DEPFET器件的成像性能以及直线对撞机用DEPFET顶点探测器的研究进展。
DEPFET pixel detectors are unique devices in terms of energy and spatial resolution because very low noise (ENC = 2.2e at room temperature) operation can be obtained by implementing the amplifying transistor in the pixel cell itself. Full DEPFET pixel matrices have been built and operated for autoradiographical imaging with imaging resolutions of 4.3 /spl plusmn/ 0.7 lp/mm at 22 keV. For applications in low energy X-ray astronomy the high energy resolution of DEPFET detectors is attractive. For particle physics, DEPFET pixels are interesting as low material detectors with high spatial resolution. For a Linear Collider detector the readout must be very fast. New readout chips have been designed and produced for the development of a DEPFET module for a pixel detector at the proposed TESLA collider (520 /spl times/ 4000 pixels) with 50 MHz line rate and 25 kHz frame rate. The circuitry contains current memory cells and current hit scanners for fast pedestal subtraction and sparsified readout. The imaging performance of DEPFET devices as well as present achievements towards a DEPFET vertex detector for a Linear Collider are presented.