A flexible open-access wire bonder for the ISOLDE Solenoidal Spectrometer upgrade project

用于 ISOLDE 电磁光谱仪升级项目的灵活开放式焊线机

• 批准号: ST/W005670/1
• 负责人: Robert Page
• 金额: $ 9.3万
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FW005670%2F1
• 关键词: flexible; open; access; wire; bonder

The elements we see around us and that constitute our bodies are predominantly stable, yet we know these were forged in violent astrophysical scenarios such as neutron star mergers that are still ongoing in our universe. The synthesis of the elements in these explosive scenarios involves nuclear reactions involving unstable nuclei. The unknown structure and reactions of these unstable nuclei critically affects our understanding of the origin of elements and as we have begun to explore the properties of these nuclei, surprising results have been found on the evolution of shell structure. These indicate that what we find in stable nuclei cannot be simply extrapolated to unstable systems. Nature is far richer and more diverse than we anticipated, leading to new shell structures driven by the underlying nature of the nuclear interaction. The locations of these shell structures are subtly and intimately associated with the shapes of nuclei. Investigating this science requires precision measurements of the structure and reactions of unstable nuclei. In a recently completed project we constructed the ISOLDE Solenoidal Spectrometer that was designed to do just this at ISOLDE (CERN), which is the world's leading facility for the production and acceleration of radioactive ion beams. The spectrometer uses silicon strip detectors that are read out using ASICs and these have to be connected together to produce the experimental data. The thousands of electrical connections are made using thin wires that are bonded ultrasonically. This is the technology underpinning the silicon trackers found at the heart of all four main LHC experiments, as well as in a host of spectrometers for low-energy nuclear physics experiments. Through this grant we will buy a new wire bonder to make prototype detector systems and detector modules for the planned upgrades of the ISOLDE Solenoidal Spectrometer that will open up new opportunities for studying the properties of nuclei that are only usually to be found in exploding stars.

我们周围看到的元素和构成身体的元素主要是稳定的，但是我们知道这些元素是在我们宇宙中仍在进行中的中子星体合并等暴力天体物理场景中伪造的。在这些爆炸性场景中，元素的合成涉及涉及不稳定核的核反应。这些不稳定核的未知结构和反应严重影响了我们对元素起源的理解，并且随着我们开始探索这些核的特性，在壳结构的演变上发现了令人惊讶的结果。这些表明，我们在稳定的核中发现的东西不能简单地推断到不稳定的系统中。大自然比我们预期的要多得多，更多样化，导致核互动的基本性质驱动的新壳结构。这些壳结构的位置与核的形状微妙而密切相关。研究该科学需要精确测量不稳定核的结构和反应。在一个最近完成的项目中，我们构建了Isolde螺线管光谱仪，该光谱光谱仪旨在在Isolde（Cern）进行此操作，这是世界上用于生产和加速放射性离子束的领先设施。光谱仪使用使用ASIC读取的硅条检测器，必须将它们连接在一起以产生实验数据。成千上万的电连接是使用超声粘结的细线进行的。这是在所有四个主要LHC实验中心的核心追踪器以及低能核物理实验的宿主中所核心的硅跟踪器的基础。通过这笔赠款，我们将购买一个新的电线螺栓，以制造原型探测器系统和探测器模块，以计划对Isolde螺线管光谱仪的计划升级，这将为研究核的特性开辟新的机会，这些机会通常仅在爆炸恒星中找到。