P. Abbon, S. Andriamonje, S. Aune, T. Dafni, M. Davenport, E. Delagnes, R. de Oliveira, G. Fanourakis, E. Ferrer Ribas, J. Franz, T. Geralis, M. Gros, Y. Giomat… 展开作者
P. Abbon, S. Andriamonje, S. Aune, T. Dafni, M. Davenport, E. Delagnes, R. de Oliveira, G. Fanourakis, E. Ferrer Ribas, J. Franz, T. Geralis, M. Gros, Y. Giomataris, I. G. Irastorza, K. Kousouris, J. Morales, T. Papaevangelou, J. Ruz, K. Zachariadou, K. Zioutas
备注：
13 pages, 12 figures and images, submitted to New Journal of
在欧洲核子研究中心的CAST实验第一阶段（2002-2004年），一个低本底Micromegas探测器一直在运行，用于搜索太阳轴子。探测器由低放射性材料制成，工作效率高，在没有屏蔽的情况下，本底抑制率很低（5 x 10^-5计数/keV/cm^2/s）。
英文摘要：
A low background Micromegas detector has been operating in the CAST experiment at CERN for the search of solar axions during the first phase of the experiment (2002-2004). The detector, made out of low radioactivity materials, operated efficiently and achieved a very low level of background rejection (5 x 10^-5 counts/keV/cm^2/s) without shielding.
A low background Micromegas detector for the CAST experiment
在欧洲核子研究中心的CAST实验第一阶段（2002-2004年），一个低本底Micromegas探测器一直在运行，用于搜索太阳轴子。由于其良好的空间和能量分辨率以及在探测器构造中使用的低放射性材料，该探测器有效运行并实现了非常低水平的背景抑制（$5\times 10^{-5}$计数keV $^{-1}$ cm $^{-2}$ s $^{-1}$）。在实验的第二阶段（2005-2007年），将对探测器进行升级，增加一个屏蔽装置并包括聚焦光学系统。这些改进应允许优于两个数量级的背景抑制。
For manufacturing Micromegas detectors, the "bulk" method based on photoetching, was successfully developed and widely used in nuclear and particle physics experiments. However, the complexity of the method requires a considerable number of advanced instruments and processing, limiting the accessibility of this method for production of Micromegas detectors. In view of these limitations with the bulk method, a new method based on thermal bonding technique (TBM) has been developed to manufacture Micromegas detectors in a much simplified and efficient way without etching. This paper describes the…
To fulfill needs in oncological research a new Micromegas detector has been developed to follow radiolabelled drugs in living organisms at the single cell level. This article describes the proof-of-concept of such a detector and compares its ability to detect and assess sub-becquerel \tritium~activities with a commercial $β$-imager
CAST microbulk micromegas in the Canfranc Underground Laboratory
在CAST实验的最后一次数据采集活动中，微兆气体探测器已经实现了$\approx 5 \times 10^{-6}$ keV $^{-1}$ cm $^{-2}$ s $^{-1}$在2和9 keV之间的背景水平。这种性能是可能的，这要归功于微批量技术的引入，屏蔽的实施和歧视算法的发展。它激发了新的研究，以更深入地了解CAST探测器的背景。其中一条工作线包括建造一个微型气体探测器在CAST中使用的装置的复制品，并将其安装在Canfranc地下实验室。由于地下和地面探测器性能之间的比较，屏蔽升级等，对探测器背景的不同贡献进行了评估。特别地，已经获得了检测器的本征背景的上限$< 2 \times 10^{-7}$ keV $^{-1}$ cm $^{-2}$ s $^{-1}$。这项工作意味着在地下实验室中对最新的micromegas技术的潜力进行了首次评估，这是最适合稀有事件探测的环境。
Spatial resolution improvement of PICOSEC Micromegas precise timing detectors
CERN（欧洲核子研究组织）；Aristotle University of Thessaloniki（塞萨洛尼基亚里士多德大学）；Ludwig Maximilian University of Munich（慕尼黑路德维希-马克西米利安大学）；Stony Brook University（石溪大学）；NCSR Demokritos（德谟克利特国家科学研究中心）；Laboratório de Instrumentação e Física Experimental de Partículas (LIP)（粒子物理与实验仪器实验室）；University of Helsinki（赫尔辛基大学）；Jefferson Lab（杰斐逊国家加速器装置）；University of Zagreb（萨格勒布大学）；University of Science and Technology of China（中国科学技术大学）；University of Bonn（波恩大学）；CEA-Saclay（法国原子能和替代能源委员会萨克雷中心）；National Technical University of Athens（雅典国立技术大学）；Ruđer Bošković Institute（鲁杰尔·博什科维奇研究所）；University of Virginia（弗吉尼亚大学）
X-ray detection with Micromegas with background levels below 10$^{-6}$ keV$^{-1}$cm$^{-2}$s$^{-1}$
Micromegas探测器是探测低能X射线的最佳技术选择。多年来，应用于这些探测器的低本底技术产生了显着的本底降低，成为这些发展的CAST实验受益者。在本文件中，我们报告了最新的升级，以进一步减少背景和更好地了解探测器的响应。升级包括读出电子设备，新的探测器设计和更有效的宇宙μ子否决系统的实施。首次在海平面获得了低于10 $^{-6}$ keV $^{-1}$ cm $^{-2}$ s $^{-1}$的本底能级，证明了下一代轴子日像仪IAO所提出的期望的可行性。本文还将介绍和讨论在CAST探测器实验室的X射线束中进行的一系列测量所获得的一些结果。
The search for weakly interacting, light particles that couple to photons received significant attention in recent years. When those particles are produced at high energies, they lead to two, nearly collinear photons after their decay and hence can be detected by an electromagnetic calorimeter system. The typical dominant background in searches for those high energetic weakly particles are single, high energetic photons, which leave similar signatures in a standard calorimeter system. One promising approach to separate signal from background events is to employ a dedicated pre-shower detector …
This work aims at the development of signal processing algorithms that can explore the potential of a PICOSEC-MicroMegas detector and offers the ability for online, precise timing. The PICOSEC-MicroMegas detector is a novel gaseous detector offering precise timing resolution in experimental measurements. The performance of the proposed signal processing algorithms is evaluated by a variety of tests using experimental data. The data used in the present research were accumulated during a Laser Beam Test at CEA/IRAMIS-SACLAY. We use two sets of experimental events: the SPE-set comprises single ph…
