The Gigatracker: An ultra-fast and low-mass silicon pixel detector for the NA62 experiment
The Gigatracker: An ultra-fast and low-mass silicon pixel detector for the NA62 experiment
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Gigatracker：用于 NA62 实验的超快低质量硅像素探测器
DOI：
10.1016/j.nima.2010.06.338
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发表时间：
2011
影响因子：
1.4
通讯作者：
S. Tiuraniemi
中科院分区：
文献类型：
--
作者：
M. Fiorini;V. Carassiti;A. Ceccucci;E. Cortina;A. C. Ramusino;G. Dellacasa;S. Garbolino;P. Jarron;J. Kapłon;A. Kluge;A. Mapelli;F. Marchetto;E. Martin;S. Martoiu;G. Mazza;M. Morel;M. Noy;G. Nuessle;F. Petrucci;P. Riedler;G. Rinella;A. Rivetti;S. Tiuraniemi
Gigatracker是一种混合型硅像素探测器，用于跟踪时间分辨率为150ps(RMS)的高强度NA62强子束。该实验的束谱仪由安装在真空中的三个Gigatraacker站组成，以精确测量每个穿越粒子的动量、时间和方向。精确跟踪要求探测器组件的质量非常低(每站0.5%X0)，以限制多次散射和束流强子相互作用。高速率，特别是高定时精度的要求非常苛刻：两个研发方案正在进行中，相应的原型读出芯片最近已经采用0.13μm cmos工艺设计和生产。一种方案使用了恒定分数鉴别器和基于像元上模拟的时间数字转换器(TDC)；另一种方案包括放置在每个像素列末端的基于延迟锁定环的TDC和具有时间行走校正技术的超阈值鉴别器。概述了该项目的研发现状，并给出了样机读出芯片的测试结果。
The Gigatracker is a hybrid silicon pixel detector developed to track the highly intense NA62 hadron beam with a time resolution of 150ps (rms). The beam spectrometer of the experiment is composed of three Gigatracker stations installed in vacuum in order to precisely measure momentum, time and direction of every traversing particle. Precise tracking demands a very low mass of the detector assembly (<0.5% X0per station) in order to limit multiple scattering and beam hadronic interactions. The high rate and especially the high timing precision requirements are very demanding: two R&D options are ongoing and the corresponding prototype read-out chips have been recently designed and produced in 0.13μm CMOS technology. One solution makes use of a constant fraction discriminator and on-pixel analogue-based time-to-digital-converter (TDC); the other comprises a delay-locked loop based TDC placed at the end of each pixel column and a time-over-threshold discriminator with time-walk correction technique. The current status of the R&D program is overviewed and results from the prototype read-out chips test are presented.