Macro Pixel ASIC (MPA): the readout ASIC for the pixel-strip (PS) module of the CMS outer tracker at HL-LHC
Macro Pixel ASIC (MPA): the readout ASIC for the pixel-strip (PS) module of the CMS outer tracker at HL-LHC
复制标题
宏像素 ASIC (MPA)：HL-LHC CMS 外部跟踪器像素条 (PS) 模块的读出 ASIC
DOI：
10.1088/1748-0221/9/11/c11012
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发表时间：
2014
影响因子：
1.3
通讯作者：
L. Ratti
中科院分区：
文献类型：
--
作者：
D. Ceresa;A. Marchioro;K. Kloukinas;J. Kapłon;W. Białas;V. Re;G. Traversi;L. Gaioni;L. Ratti
HL-LHC 的 CMS 跟踪器需要向中央 1 级触发器提供有关具有高横向动量的粒子的及时信息。为此，外部跟踪器的最内部部分基于像素化传感器与短条形传感器的组合，即所谓的像素条模块（PS）。这些传感器的读出由不同的 ASIC 执行，即用于条带层的条带传感器 ASIC (SSA) 和用于像素层的宏像素 ASIC (MPA)。由于数据量大（每个模块 30720 个像素和 1920 个条带）和有限的功耗预算，直接在前端模块上处理数据带来了设计挑战。这就是为什么进行多项研究来寻找 ASIC 性能和功耗之间的最佳折衷方案的原因。本文描述了 MPA ASIC 开发的现状，其中实现了生成高横向动量粒子提示信息的逻辑。概述了读出方法，特别关注簇缩减、位置编码和动量判别逻辑。关于架构研究，我们开发了一个能够读取物理蒙特卡罗生成事件的软件测试平台，并用于验证 MPA 设计和评估 MPA 性能。 MPA-Light 计划于今年提交制造，并将包括最终版本的完整模拟功能和部分数字逻辑，以便验证模拟前端、模块组装和低压数字电源所选择的 VLSI 技术。
The CMS tracker at HL-LHC is required to provide prompt information on particles with high transverse momentum to the central Level 1 trigger. For this purpose, the innermost part of the outer tracker is based on a combination of a pixelated sensor with a short strip sensor, the so-called Pixel-Strip module (PS). The readout of these sensors is carried out by distinct ASICs, the Strip Sensor ASIC (SSA), for the strip layer, and the Macro Pixel ASIC (MPA) for the pixel layer. The processing of the data directly on the front-end module represents a design challenge due to the large data volume (30720 pixels and 1920 strips per module) and the limited power budget. This is the reason why several studies have been carried out to find the best compromise between ASICs performance and power consumption. This paper describes the current status of the MPA ASIC development where the logic for generating prompt information on particles with high transverse momentum is implemented. An overview of the readout method is presented with particular attention on the cluster reduction, position encoding and momentum discrimination logic. Concerning the architectural studies, a software test bench capable of reading physics Monte-Carlo generated events has been developed and used to validate the MPA design and to evaluate the MPA performance. The MPA-Light is scheduled to be submitted for fabrication this year and will include the full analog functions and a part of the digital logic of the final version in order to qualify the chosen VLSI technology for the analog front-end, the module assembly and the low voltage digital supply.