6 pages, to appear in the Proceedings of the Int. Workshop on Semiconductor Pixel Detectors for Particles and Imaging - Pixel2010, Grindelwald, Switzerland, September 2010, on Nucl. Instr. and Meth A
The anticipated physics program at an high energy e+e- linear collider places special emphasis on the accuracy in extrapolating charged particle tracks to their production vertex to tag heavy quarks and leptons. This paper reviews physics motivations and performance requirements, sensor R&D directions and current results of the studies for a vertex tracker at a future linear collider.
Detector mechanics can play a significant role in a detector's performance, improvements typically require in-depth study of total mass, novel ways to reduce the total mass, as well as more integrated design concepts to save on material budgets and optimize performance. Particle detectors at future colliders rely on ever more precise charged particle tracking devices, which are supported by structures manufactured from composite materials. This article lays out engineering techniques able to solve challenges related to the design and manufacturing of future support structures. Examples of curr…
The physics aims at the proposed future high-energy linear $e^+e^-$ collider CLIC pose challenging demands on the performance of the detector system. In particular, the vertex and tracking detectors have to combine a spatial resolution of a few micrometres and a low material budget with a time-stamping accuracy of a few nanoseconds. For the vertex detector, fine-pitch sensors, dedicated 65nm readout ASICs, fine-pitch bonding techniques using solder bumps or anisotropic conductive films as well as monolithic devices based on Silicon-On-Insulator technology are explored. Fully monolithic CMOS se…
In the next years, the energy and intensity frontiers of the experimental Particle Physics will be pushed forward with the upgrade of existing accelerators (LHC at CERN) and the envisaged construction of new machines at energy scales up to hundreds TeV or with unprecedented intensity (FCC-hh, FCC-ee, ILC, Muon Collider). Large size, cost-effective, high-efficiency detection systems in high background environments are required in order to accomplish the physics program. MPGDs offer a diversity of technologies that allow them to meet the required performance challenges at future facilities thank…
In high energy physics (HEP) experiments, the reconstruction of charged particle trajectories is one of the most fundamental yet computationally expensive parts of event processing. At future hadron colliders such as the High-Luminosity Large Hadron Collider (HL-LHC), there can be up to ten thousand particles per event. This increases the track reconstruction time by a factor about 5 compared to the current tracking environment. Efficient and fast tracking software is necessary to maintain and improve the tracking performance. This can benefit from both fast tracking algorithms and modern comp…
Precision Inclusive Higgs Physics at $e^+e^-$ Colliders With Tracking Detectors and Without Calorimetry
未来$e^+e^-$对撞机计划的主要目标是精确测量希格斯玻色子的性质。出于实际原因，确定达到这一目标和其他科学目标所需的最小探测器规格集是有意义的。这种信息可能有助于为整个对撞机项目制定一个分阶段的方法，其最初的低成本版本侧重于实现一些主要的科学目标。在这里，我们调查的精度可获得的$e^+ e^- \rightarrow Z h \rightarrow μ^+ μ^- X$包容性截面和希格斯玻色子质量使用的双μ子反冲法，考虑到探测器，只有一个内部的跟踪系统内的螺线管磁场，周围有许多核相互作用长度的吸收材料，和外部μ子识别系统。我们发现，在这些测量中实现的灵敏度与这样的跟踪检测器相比，预期的一般用途的检测器与额外的电磁和强子量能计系统仅略有减少。这种差异主要是由于多光子背景不容易被跟踪探测器拒绝。我们还评论的前景类似的测量的包容性截面$σ( e^+ e^- \to Z h \to e^+ e^- X)$。最后，我们研究搜索轻标量利用双μ子反冲方法，估计投影范围与跟踪和通用探测器。
The combined vertexing and tracking performance of the innermost part of the FCC-ee experiments must deliver outstanding precision for measurement of the track momentum together with an impact parameter resolution exceeding by at least a factor five that typically achieved at LHC experiments. Furthermore, precision measurements require stability and fiducial accuracy at a level which is unprecedented in collider experiments. For the innermost vertex layers these goals translate into a target hit resolution of approximately 3 $μ$m together with a material budget of around 0.2\% of a radiation l…
Kyushu University（九州大学）；The University of Tokyo（东京大学）；Osaka University（大阪大学）；Osaka City University（大阪市立大学）
Deep learning is a rapidly-evolving technology with possibility to significantly improve physics reach of collider experiments. In this study we developed a novel algorithm of vertex finding for future lepton colliders such as the International Linear Collider. We deploy two networks; one is simple fully-connected layers to look for vertex seeds from track pairs, and the other is a customized Recurrent Neural Network with an attention mechanism and an encoder-decoder structure to associate tracks to the vertex seeds. The performance of the vertex finder is compared with the standard ILC recons…
The determination of charged particle trajectories (tracking) in collisions at the CERN Large Hadron Collider (LHC) is one of the most important aspects for event reconstruction at hadron colliders. This is especially true in the high conditions expected during the future high-luminosity phase of the LHC (HL-LHC) where the number of interactions per beam crossing will increase by a factor of five. Deep learning algorithms have been successfully applied to this task for offline applications. However, their study in hardware-based trigger applications has been limited . In this paper, we study d…
Physics Informed Neural Networks for design optimisation of diamond particle detectors for charged particle fast-tracking at high luminosity hadron colliders
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze（意大利佛罗伦萨核物理研究所）；ICSC - Centro Nazionale di Ricerca in High Performance Computing, Big Data & Quantum Computing（高性能计算、大数据与量子计算国家研究中心）
The future Electron-Ion Collider (EIC) will utilize a series of high-luminosity high-energy electron+proton ($e+p$) and electron+nucleus ($e+A$) collisions to explore the inner structure of nucleon and nucleus and the matter formation process. Heavy flavor hadron and jet measurements at the EIC will play an essential role in determining the nucleon/nucleus parton distribution function and heavy quark hadronization process in not well constrained kinematic regions. A high granularity and low material budget forward silicon tracker will enable precise forward heavy flavor measurements at the EIC…
A Prototype Combination TPC Cherenkov Detector with GEM Readout for Tracking and Particle Identification and its Potential Use at an Electron Ion Collider
正在开发一种原型探测器，它结合了用于带电粒子跟踪的时间投影室和用于粒子识别的切伦科夫探测器的功能。TPC由一个10 × 10 × 10 cm 3漂移体积组成，其中电荷漂移到10 × 10 cm 2三重GEM检测器。在由2x 10 mm 2 V形焊盘组成的读出平面上测量电荷，V形焊盘在V形方向上提供每点约100微米的空间分辨率以及dE/dx信息。探测器的切伦科夫部分由第二个10 × 10 cm 2的三重GEM组成，顶层有一个光敏CsI光电阴极。该探测器测量由高于阈值的高速粒子在TPC的漂移气体中产生的切伦科夫光。CF 4或CF 4混合物将用作漂移气体，其对UV光高度透明，并且可以提供用于检测切伦科夫光子的优异效率。漂移气体也用作两种GEM探测器的工作气体。原型探测器已经建成，目前正在实验室中用源和宇宙射线进行测试，计划今后进行更多的测试，以便在测试束中研究探测器。
A prototype of the CMOS pixel sensor named SUPIX-1 has been fabricated and tested in order to investigate the feasibility of a pixelated tracker for a proposed Higgs factory, namely, the Circular Electron-Positron Collider (CEPC). The sensor, taped out with a 180 nm CMOS Image Sensor (CIS) process, consists of nine different pixel arrays varying in pixel pitches, diode sizes and geometries in order to study the particle detection performance of enlarged pixels. The test was carried out with a Fe-55 radioactive source. Two soft X-ray peaks observed were used to calibrate the charge to voltage f…
