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Implications of Mini-EUSO measurements for a space-based observation of UHECRs Mini-EUSO测量对天基uhecr观测的意义
Pub Date : 2023-07-25 DOI: 10.22323/1.444.0272
M. Bertaina, D. Barghini, M. Battisti, A. Belov, M. Bianciotto, F. Bisconti, C. Blaksley, S. Blin, K. Bolmgren, G. Cambiè, F. Capel, M. Casolino, I. Churilo, M. Crisconio, C. de La Taille, T. Ebisuzaki, J. Eser, F. Fenu, G. Filippatos, M. Franceschi, C. Fuglesang, A. Golzio, P. Gorodetzky, F. Kajino, H. Kasuga, P. Klimov, V. Kungel, V. Kuznetsov, M. Manfrin, L. Marcelli, G. Mascetti, Włodzimierz Marszał, M. Mignone, H. Miyamoto, A. Murashov, T. Napolitano, H. Ohmori, A. Olinto, E. Parizot, P. Picozza, L. Piotrowski, Z. Plebaniak, G. Prévôt, E. Reali, M. Ricci, G. Romoli, N. Sakaki, S. Sharakin, K. Shinozaki, J. Szabelski, Y. Takizawa, G. Valentini, M. Vrábel, L. Wiencke, M. Zotov
Mini-EUSO is the first mission of the JEM-EUSO program on board the International Space Station. It was launched in 2019 and it is currently located in the Russian section (Zvezda module) of the station and viewing our planet from a nadir-facing UV-transparent window. The instrument is based on the concept of the original JEM-EUSO mission and consists of an optical system employing two Fresnel lenses and a focal surface composed of 36 Multi-Anode Photomultiplier tubes, 64 channels each, for a total of 2304 channels with single photon counting sensitivity and an overall field of view of 44° × 44°. Mini-EUSO can map the night-time Earth in the near UV range (predominantly between 290 nm and 430 nm), with a spatial resolution of about 6.3 km and different temporal resolutions of 2.5 µ, 320 µs and 41 ms. Mini-EUSO observations are extremely important to better assess the potential of a space-based detector in studying Ultra-High Energy Cosmic Rays (UHECRs) such as K-EUSO and POEMMA. In this contribution we focus the attention on UV measurements, the observation of clouds and of certain categories of events that Mini-EUSO triggers with the shortest temporal resolution. We place them in the context of UHECR observations from space, namely the estimation of exposure and sensitivity to Extensive Air Showers.
Mini-EUSO是JEM-EUSO项目在国际空间站上的第一个任务。它于2019年发射,目前位于国际空间站的俄罗斯部分(星号舱),从一个面向谷底的紫外线透明窗口观察我们的星球。该仪器基于原始JEM-EUSO任务的概念,由一个光学系统组成,采用两个菲涅耳透镜和一个由36个多阳极光电倍增管组成的焦面,每个管64个通道,总共2304个通道,单光子计数灵敏度和44°× 44°的整体视野。Mini-EUSO可以在近紫外范围内(主要在290 ~ 430 nm之间)绘制夜间地球地图,空间分辨率约为6.3 km,时间分辨率分别为2.5µ、320µs和41 ms。小型euso观测对于更好地评估天基探测器在研究超高能量宇宙射线(uhecr)方面的潜力(如K-EUSO和POEMMA)非常重要。在这篇文章中,我们把注意力集中在紫外线测量、云的观测以及Mini-EUSO以最短的时间分辨率触发的某些类别的事件上。我们将它们放在从太空进行的UHECR观测的背景下,即对大范围空气阵雨的暴露和敏感性的估计。
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引用次数: 1
Measurement of Cosmic-ray Energy Spectrum with the TALE Detector in Hybrid Mode 混合模式下TALE探测器的宇宙射线能谱测量
Pub Date : 2023-07-25 DOI: 10.1051/epjconf/202328302006
H. Oshima, K. Fujita, S. Ogio, T. Sako
The TA Low-energy Extension (TALE) experiment extends the energy range observed by the TA experiment to below 1016 eV. We aim to study the transition from galactic to extragalactic cosmic rays. The TALE detector is a hybrid apparatus composed of fluorescence telescopes and surface detectors. The surface detectors are arranged to be suitable for hybrid energy spectrum measurements in the low-energy region. We measured the energy spectrum with the 392 hours observation data of the TALE hybrid detector. This energy spectrum measurement will play an important role in understanding the transition from cosmic rays of galactic origin to those of extragalactic origin.
TA低能扩展(TALE)实验将TA实验观测到的能量范围扩展到1016 eV以下。我们的目标是研究从银河系到星系外宇宙射线的转变。TALE探测器是由荧光望远镜和表面探测器组成的混合装置。表面探测器的布置适合于低能区的混合能谱测量。我们利用TALE混合探测器392小时的观测数据测量了其能谱。这种能谱测量将在理解从银河系起源的宇宙射线到河外起源的宇宙射线的转变方面发挥重要作用。
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引用次数: 0
Studying baryon production using two-particle angular correlations 利用两粒子角关联研究重子产生
Pub Date : 2023-07-10 DOI: 10.1051/epjconf/202023501004
M. Janik
Latest measurements of ΔηΔφ correlations of identified particles show differences in particle production between baryons and mesons. The correlation functions for mesons exhibit the expected peak dominated by effects of mini-jet fragmentation and are reproduced well by general purpose Monte Carlo generators. For baryon pairs (where both particles have the same baryon number) a surprising near-side anti-correlation structure is observed instead of a peak, implying that two such particles are rarely produced with similar momentum. These results present a challenge to the contemporary models and there is no definite theoretical explanation of the observation. In this proceedings an overview of the latest baryon correlation measurements yielding startling results are presented.
最近对已识别粒子ΔηΔφ相关性的测量显示重子和介子在粒子产生方面的差异。介子的相关函数表现出预期的峰值,主要受微射流碎片效应的影响,并可由通用蒙特卡罗发生器很好地再现。对于重子对(两个粒子都有相同的重子数),一个令人惊讶的近侧反相关结构被观察到,而不是一个峰值,这意味着两个这样的粒子很少产生相似的动量。这些结果对当代模型提出了挑战,并且没有明确的理论解释。在这个程序概述了最新的重子相关测量产生惊人的结果。
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引用次数: 1
Calorons, monopoles and stable, charged solitons 卡洛子、单极子和稳定的带电孤子
Pub Date : 2023-06-30 DOI: 10.1051/epjconf/202227402015
M. Faber
We discuss the similarity of the constituent monopoles of calorons and stable topological solitons with long range Coulombic interaction, classical solutions of the model of topological particles. In the interpretation as electric charges they can be compared to electrons and positrons with spin up and down, with quantised charge and finite mass.
讨论了具有长距离库仑相互作用的稳定拓扑孤子和卡洛子组成单极子的相似性,这是拓扑粒子模型的经典解。在作为电荷的解释中,它们可以被比作电子和正电子,具有上下自旋,量子化电荷和有限质量。
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引用次数: 0
ENUBET: A monitored neutrino beam for high precision cross section measurements ENUBET:用于高精度截面测量的监测中微子束
Pub Date : 2023-06-30 DOI: 10.1051/epjconf/202328201018
C. Delogu, F. Acerbi, I. Angelis, L. Bomben, M. Bonesini, F. Bramati, A. Branca, C. Brizzolari, G. Brunetti, M. Calviani, S. Capelli, S. Carturan, M. Catanesi, S. Cecchini, N. Charitonidis, F. Cindolo, G. Cogo, G. Collazuol, F. Dal Corso, G. De Rosa, A. Falcone, B. Goddard, A. Gola, L. Halić, F. Iacob, C. Jollet, V. Kain, A. Kallitsopoulou, B. Kliček, Y. Kudenko, C. Lampoudis, M. Laveder, P. Legou, A. Longhin, L. Ludovici, E. Lutsenko, L. Magaletti, G. Mandrioli, S. Marangoni, A. Margotti, V. Mascagna, N. Mauri, L. Meazza, A. Meregaglia, M. Mezzetto, M. Nessi, A. Paoloni, M. Pari, T. Papaevangelou, E. Parozzi, L. Pasqualini, G. Paternoster, L. Patrizii, M. Pozzato, M. Prest, F. Pupilli, E. Radicioni, A. Ruggeri, D. Sampsonidis, C. Scian, G. Sirri, M. Stipčević, M. Tenti, F. Terranova, M. Torti, S. Tzamarias, E. Vallazza, F. Velotti, L. Votano
The main source of systematic uncertainty on neutrino cross section measurements at the GeV scale is represented by the poor knowledge of the initial flux. The goal of cutting down this uncertainty to 1% can be achieved through the monitoring of charged leptons produced in association with neutrinos, by properly instrumenting the decay region of a conventional narrow-band neutrino beam. Large angle muons and positrons from kaons are measured by a sampling calorimeter on the decay tunnel walls (tagger), while muon stations after the hadron dump can be used to monitor the neutrino component from pion decays. This instrumentation can provide a full control on both the muon and electron neutrino fluxes at all energies. Furthermore, the narrow momentum width (<10%) of the beam provides a O(10%) measurement of the neutrino energy on an event by event basis, thanks to its correlation with the radial position of the interaction at the neutrino detector. The ENUBET project has been funded by the ERC in 2016 to prove the feasibility of such a monitored neutrino beam and is cast in the framework of the CERN neutrino platform (NP06) and the Physics Beyond Colliders initiative. In our contribution, we summarize the ENUBET design, physics performance and opportunities for its implementation in a timescale comparable with next long baseline neutrino experiments.
GeV尺度上的中微子截面测量系统不确定性的主要来源是对初始通量的不了解。将这种不确定性降低到1%的目标可以通过监测与中微子相关的带电轻子来实现,通过适当地测量传统窄带中微子束的衰变区域。介子的大角度介子和正电子是通过在衰变隧道壁上的采样量热计测量的,而强子倾倒后的介子站可以用来监测介子衰变中的中微子成分。该仪器可以提供对所有能量的μ子和电子中微子通量的全面控制。此外,由于光束的窄动量宽度(<10%)与中微子探测器处相互作用的径向位置相关,因此可以在一个事件的基础上对中微子能量进行O(10%)测量。ENUBET项目于2016年由ERC资助,旨在证明这种监测中微子束的可行性,并在CERN中微子平台(NP06)和物理超越对撞机计划的框架内进行。在我们的贡献中,我们总结了ENUBET的设计,物理性能以及它在与下一个长基线中微子实验相当的时间尺度上实现的机会。
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引用次数: 1
The Radio Detector of the Pierre Auger Observatory – status and expected performance 皮埃尔·奥格天文台的无线电探测器——现状和预期性能
Pub Date : 2023-05-17 DOI: 10.1051/epjconf/202328306002
T. Huege
As part of the ongoing AugerPrime upgrade of the Pierre Auger Observatory, we are deploying short aperiodic loaded loop antennas measuring radio signals from extensive air showers in the 30 – 80 MHz band on each of the 1,660 surface detector stations. This new Radio Detector of the Observatory allows us to measure the energy in the electromagnetic cascade of inclined air showers with zenith angles larger than ∼ 65°. The water-Cherenkov detectors, in turn, perform a virtually pure measurement of the muon component of inclined air showers. The combination of both thus extends the mass-composition sensitivity of the upgraded Observatory to high zenith angles and therefore enlarges the sky coverage of mass-sensitive measurements at the highest energies while at the same time allowing us to cross-check the performance of the established detectors with an additional measurement technique. In this contribution, we outline the concept and design of the Radio Detector, report on its current status and initial results from the first deployed stations, and illustrate its expected performance with a detailed, end-to-end simulation study.
作为皮埃尔·奥格天文台正在进行的AugerPrime升级的一部分,我们正在部署短非周期负载环形天线,在每个1,660个地面探测器站上测量来自30 - 80 MHz频段的广泛空气阵雨的无线电信号。天文台的这个新的无线电探测器使我们能够测量天顶角大于~ 65°的倾斜空气阵雨的电磁级联中的能量。反过来,水-切伦科夫探测器对倾斜空气簇射的介子成分进行了几乎纯粹的测量。因此,两者的结合将升级后的天文台的质量成分灵敏度扩展到高天顶角,从而扩大了在最高能量下质量敏感测量的天空覆盖范围,同时使我们能够用额外的测量技术交叉检查已建立的探测器的性能。在这篇文章中,我们概述了无线电探测器的概念和设计,报告了它的现状和第一批部署站的初步结果,并通过详细的端到端模拟研究说明了它的预期性能。
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引用次数: 0
Design and realization of a miniaturized high resolution computed tomography imaging spectrometer 小型化高分辨率计算机断层成像光谱仪的设计与实现
Pub Date : 2023-05-01 DOI: 10.1051/epjconf/202226602001
S. Amann, T. Haist, Alexander Gatto, Markus Kamm, A. Herkommer
The computed tomography imaging spectrometer (CTIS) is a relatively unknown snapshot hyperspectral camera. It utilizes computational imaging approaches to gain the hyperspectral image from a spatiospectral smeared sensor image. We present a strongly miniaturized system with a dimension of only 36mm x 40.5mm x 52.8mm and a diagonal field of view of 29°. We achieve this using a Galilean beam expander and a combination of off-the-shelf lenses, a highly aspherical imaging system from a commercial smartphone and a 13 MP monochrome smartphone image sensor. The reconstructed hyperspectral image has a spatial resolution of 400 x 300 pixel with 39 spectral channels.
计算机断层成像光谱仪(CTIS)是一种相对未知的快照高光谱相机。它利用计算成像方法从空间光谱涂抹的传感器图像中获得高光谱图像。我们提出了一个高度小型化的系统,尺寸仅为36mm x 40.5mm x 52.8mm,对角线视野为29°。我们使用伽利略光束扩展器和现成的镜头,来自商用智能手机的高度非球面成像系统和13mp单色智能手机图像传感器的组合来实现这一目标。重建的高光谱图像空间分辨率为400 × 300像素,具有39个光谱通道。
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引用次数: 0
Terzina on board NUSES: A pathfinder for EAS Cherenkov Light Detection from space 在NUSES上的Terzina:从太空进行EAS切伦科夫光探测的探路者
Pub Date : 2023-04-24 DOI: 10.1051/epjconf/202328306006
L. Burmistrov
In this paper we introduce the Terzina telescope as a part of the NUSES space mission. This telescope aims to detect Ultra High Energy Cosmic Rays (UHECRs) through the Cherenkov light emission from the extensive air showers (EAS) that they create in the Earth’s atmosphere. The Cherenkov photons are aligned along the shower axis inside about ∼ 0.2 − 1°, so that they become detectable by Terzina when it points towards the Earth’s limb. A sun-synchronous orbit will allow the telescope to observe only the night side of the Earth’s atmosphere. In this contribution, we focus on the description of the telescope detection goals, geometry, optical design and its photon detection camera composed of Silicon Photo-Multipliers (SiPMs). Moreover, we describe the full Monte Carlo simulation chain developed to estimate Terzina’s performance for UHECR detection. The estimate of the radiation damage and light background rates, the readout electronics and trigger logic are briefly described. Terzina will be able to study the potential for future physics missions devoted to UHECR detection and to UHE neutrino astronomy. It is a pathfinder for missions like POEMMA or future constellations of similar satellites to NUSES.
在本文中,我们介绍了作为NUSES空间任务的一部分的Terzina望远镜。这台望远镜旨在通过切伦科夫光发射探测超高能宇宙射线(uhecr),这些辐射来自于地球大气中产生的大面积空气阵雨(EAS)。切伦科夫光子沿着淋浴轴在内部排列约0.2−1°,因此当它指向地球的边缘时,它们就能被Terzina探测到。太阳同步轨道将允许望远镜只观察地球大气层的夜间。在这篇文章中,我们重点描述了望远镜的探测目标、几何结构、光学设计及其由硅光倍增器(SiPMs)组成的光子探测相机。此外,我们描述了开发的完整蒙特卡罗模拟链,以估计Terzina在UHECR检测中的性能。简要描述了辐射损伤和光背景速率的估计、读出电子器件和触发逻辑。Terzina将能够研究未来致力于uher探测和UHE中微子天文学的物理任务的潜力。它是像POEMMA这样的任务的探路者,或者是未来与NUSES类似的卫星星座。
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引用次数: 6
Linearly modulated multi-focal diffractive lens for multi-sheet excitation of flow-driven samples in a light-sheet fluorescence microscope 用于光片荧光显微镜中流驱动样品多片激发的线性调制多焦衍射透镜
Pub Date : 2023-04-21 DOI: 10.1051/epjconf/202226604004
M. Hofmann, Shima Gharbi Ghebjagh, Chao Fan, Yuchao Feng, K. Lemke, S. Sinzinger
Light-sheet fluorescence microscopy (LSFM) with single light-sheet illumination enables rapid 3Dimaging of living cells. In this paper we show the design, fabrication and characterization of a diffractive optical element producing several light sheets along an inclined tube for applications in flow-driven imaging. The element, which is based on a multi-focal Fresnel zone plate and a linear grating, generates in combination with a refractive cylindrical lens five thin light sheets of equal intensity.
单光片荧光显微镜(LSFM)采用单光片照明,可对活细胞进行快速三维成像。在本文中,我们展示了衍射光学元件的设计,制造和特性,产生沿倾斜管的几个光片用于流驱动成像。该元件基于多焦菲涅耳带板和线性光栅,与折射率圆柱形透镜结合产生五层等强度的薄光片。
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引用次数: 0
Improving nuclear data evaluations with predictive reaction theory and indirect measurements 用预测反应理论和间接测量改进核数据评价
Pub Date : 2023-04-20 DOI: 10.1051/epjconf/202328403012
J. Escher, Kirana Bergstrom, E. Chimanski, O. Gorton, E. J. In, M. Kruse, S. P'eru, C. Pruitt, R. Rahman, Emily Shinkle, Aaina Thapa, W. Younes
Nuclear reaction data required for astrophysics and applications is incomplete, as not all nuclear reactions can be measured or reliably predicted. Neutron-induced reactions involving unstable targets are particularly challenging, but often critical for simulations. In response to this need, indirect approaches, such as the surrogate reaction method, have been developed. Nuclear theory is key to extract reliable cross sections from such indirect measurements. We describe ongoing efforts to expand the theoretical capabilities that enable surrogate reaction measurements. We focus on microscopic predictions for charged-particle inelastic scattering, uncertainty-quantified optical nucleon-nucleus models, and neural-network enhanced parameter inference.
天体物理学和应用所需的核反应数据是不完整的,因为并非所有的核反应都可以测量或可靠地预测。涉及不稳定目标的中子诱导反应尤其具有挑战性,但通常对模拟至关重要。为了满足这一需求,人们开发了间接方法,如替代反应法。核理论是从这种间接测量中提取可靠截面的关键。我们描述了正在进行的努力,以扩大理论能力,使替代反应测量。我们专注于带电粒子非弹性散射的微观预测,不确定性量化光学核子-核子模型,以及神经网络增强的参数推理。
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引用次数: 0
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