Optimisation of the scintillation light collection and uniformity for the SoLid experiment
Y. Abreu, Y. Amhis, W. Beaumont, M. Bongrand, D. Boursette, B. C. Castle, K. Clark, B. Coupé, D. Cussans, A. De Roeck, D. Durand, M. Fallot, L. Ghys, L. Giot, K… 展开作者
Y. Abreu, Y. Amhis, W. Beaumont, M. Bongrand, D. Boursette, B. C. Castle, K. Clark, B. Coupé, D. Cussans, A. De Roeck, D. Durand, M. Fallot, L. Ghys, L. Giot, K. Graves, B. Guillon, D. Henaff, B. Hosseini, S. Ihantola, S. Jenzer, S. Kalcheva, L. N. Kalousis, M. Labare, G. Lehaut, S. Manley, L. Manzanillas, J. Mermans, I. Michiels, C. Moortgat, D. Newbold, J. Park, V. Pestel, K. Petridis, I. Piñera, L. Popescu, D. Ryckbosch, N. Ryder, D. Saunders, M. -H. Schune, M. Settimo, L. Simard, A. Vacheret, G. Vandierendonck, S. Van Dyck, P. Van Mulders, N. van Remortel, S. Vercaemer, M. Verstraeten, B. Viaud, A. Weber, F. Yermia
备注：
25 pages, 19 figures, published in JINST 2018_JINST_13_P09005
This paper presents a comprehensive optimisation study to maximise the light collection efficiency of scintillating cube elements used in the SoLid detector. Very short baseline reactor experiments, like SoLid, look for active to sterile neutrino oscillation signatures in the anti-neutrino energy spectrum as a function of the distance to the core and energy. Performing a precise search requires high light yield of the scintillating elements and uniformity of the response in the detector volume. The SoLid experiment uses an innovative hybrid technology with two different scintillators: polyvinyltoluene scintillator cubes and $^6$LiF:ZnS(Ag) screens. A precision test bench based on a $^{207}$Bi calibration source has been developed to study improvements on the energy resolution and uniformity of the prompt scintillation signal of antineutrino interactions. A trigger system selecting the 1~MeV conversion electrons provides a Gaussian energy peak and allows for precise comparisons of the different detector configurations that were considered to improve the SoLid detector light collection. The light collection efficiency is influenced by the choice of wrapping material, the position of the $^6$LiF:ZnS(Ag) screen, the type of fibre, the number of optical fibres and the type of mirror at the end of the fibre. This study shows that large gains in light collection efficiency are possible compared to the SoLid SM1 prototype. The light yield for the SoLid detector is expected to be at least 52$\pm$2 photo-avalanches per MeV per cube, with a relative non-uniformity of 6 %, demonstrating that the required energy resolution of at least 14 % at 1 MeV can be achieved.
The use of xenon-doped liquid argon is a promising alternative for large pure liquid-argon TPCs. Not only xenon-doped liquid argon enhances the light production, mitigating the possible suppression due to impurities, but also it increases the wavelength of the scintillation light, enlarging the effective Rayleigh scattering length and improving the detection uniformity. ProtoDUNE Dual-Phase is a 300-ton active volume LAr TPC, a prototype for the Deep Underground Neutrino Experiment (DUNE), a dual-site experiment for long-baseline neutrino oscillation studies, neutrino astrophysics and nucleon …
Study of Possible Scintillation Mechanism Damage in PbWO4 Crystals After Pion Irradiation
我们采用了两种独立的方法来研究可能的损害钨酸铅晶体中的闪烁机制，由于照射的34 GeV的介子束。首先，用窄光束同时照射10个晶体超过30小时，这样每个晶体只有一小部分区域受到影响。我们研究了辐照对光输出不均匀性的影响。如果观察到局部降解，则表明闪烁机制受损。其次，我们使用两个光电管连接到一个晶体的两侧检测光输出。由于这些光电管仅从小的局部区域检测闪烁光，因此传输损耗的影响应该是最小的。我们没有看到任何统计学上显着的证据，闪烁机制损害与任何方法。影响与零一致，95% C. L时上限为0.5%。
The Resistive Plate Chamber is a widely used detector in high energy physics. The operating potential of this chamber is determined by the optimisation of the efficiency and noise rate of the device. This optimisation is based on the assumption that the performance of the device over the whole surface area is uniform. The INO-ICAL experiment is going to use $\sim$ 30000 RPC of size $\sim$2\,m$\times$2\,m. All the RPC will have to pass a minimum quality assurance criteria, but may not be able to maintain a good uniformity over the whole surface area, particularly for the whole running period of…
DANSS is a one cubic meter plastic scintillator detector with a primary goal of the sterile neutrino searches at a commercial nuclear reactor. Due to its highly advantageous location, fine segmentation and ability to change the distance to the neutrino production origin DANSS is ahead of many similar experiments around the world in terms of the counting rate, signal to background ratio and sterile neutrino exclusion regions. Yet a moderate energy resolution of the detector prevents the further progress in the physics program. The main challenge of the planned upgrade is to achieve the energy r…
The performance of a Thick-COBRA (THCOBRA) gaseous detector is studied using an optical readout technique. The operation principle of this device is described, highlighting its operation in a gas mixture of Ar/CF4 (80/20%) for visible scintillation light emission. The contributions to the total gain from the holes and the anode strips as a function of the applied bias voltage were visualized. The preservation of spatial information from the initial ionizations was demonstrated by analyzing the light emission from 5.9keV X-rays of an 55Fe source. The observed non-uniformity of the scintillation…
Precision Light Yield and Crosstalk Characterization for the SuperFGD scintillator cubes
Lebedev Physical Institute of the Russian Academy of Sciences（俄罗斯科学院列别杰夫物理研究所）；Institute for Nuclear Research of RAS（俄罗斯科学院核问题研究所）；Moscow Institute of Physics and Technology（莫斯科物理技术学院）；B.P. Konstantinov Petersburg Nuclear Physics Institute（B.P.康斯坦丁诺夫圣彼得堡核物理研究所）；National Research Center Kurchatov Institute（库尔恰托夫国家研究中心）；National Research Nuclear University MEPhI（国立核研究大学MEPhI）
Production and installation of wavelength-shifting reflective light enhancers for the Short-Baseline Near Detector
Argonne National Laboratory（阿贡国家实验室）；Brookhaven National Laboratory（布鲁克海文国家实验室）；University of California, Santa Barbara（加州大学圣塔芭芭拉分校）；Center for Information Technology Renato Archer（雷纳托·阿切尔信息技术中心）；University of Chicago（芝加哥大学）；Colorado State University（科罗拉多州立大学）；Columbia University（哥伦比亚大学）；University of Edinburgh（爱丁堡大学）；Fermi National Accelerator Laboratory（费米国家加速器实验室）；University of Florida（佛罗里达大学）；Illinois Institute of Technology（伊利诺伊理工学院）；Imperial College London（伦敦帝国理工学院）；University of Kansas（堪萨斯大学）；Lancaster University（兰卡斯特大学）；University of Liverpool（利物浦大学）；Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室）；Louisiana State University（路易斯安那州立大学）；University of Manchester（曼彻斯特大学）；University of Michigan（密歇根大学）；University of Minnesota（明尼苏达大学）；Mount Holyoke College（蒙特霍利约克学院）；University of Notre Dame（圣母大学）；University of Oxford（牛津大学）；University of Pennsylvania（宾夕法尼亚大学）；Queen Mary University of London（伦敦大学玛丽女王学院）；Rutgers University（罗格斯大学）；University of Sheffield（谢菲尔德大学）；University of Sussex（萨塞克斯大学）；Syracuse University（雪城大学）；University of Texas at Arlington（德克萨斯大学阿灵顿分校）；Tufts University（塔夫茨大学）；Center for Neutrino Physics, Virginia Tech（弗吉尼亚理工大学中微子物理中心）；University of Warwick（华威大学）
The EXO-200 experiment searched for neutrinoless double-beta decay of $^{136}$Xe with a single-phase liquid xenon detector. It used an active mass of 110 kg of 80.6%-enriched liquid xenon in an ultra-low background time projection chamber with ionization and scintillation detection and readout. This paper describes the design and performance of the various support systems necessary for detector operation, including cryogenics, xenon handling, and controls. Novel features of the system were driven by the need to protect the thin-walled detector chamber containing the liquid xenon, to achieve hi…
CUPID-Mo is a bolometric experiment to search for neutrinoless double-beta decay ($0νββ$) of $^{100}$Mo. In this article, we detail the CUPID-Mo detector concept, assembly, installation in the underground laboratory in Modane in 2018, and provide results from the first datasets. The demonstrator consists of an array of 20 scintillating bolometers comprised of $^{100}$Mo-enriched 0.2 kg Li$_2$MoO$_4$ crystals. The detectors are complemented by 20 thin cryogenic Ge bolometers acting as light detectors to distinguish $α$ from $γ$/$β$ events by the detection of both heat and scintillation light si…
The CUPID Collaboration is designing a tonne-scale, background-free detector to search for double beta decay with sufficient sensitivity to fully explore the parameter space corresponding to the inverted neutrino mass hierarchy scenario. One of the CUPID demonstrators, CUPID-Mo, has proved the potential of enriched Li$_{2}$$^{100}$MoO$_4$ crystals as suitable detectors for neutrinoless double beta decay search. In this work, we characterised cubic crystals that, compared to the cylindrical crystals used by CUPID-Mo, are more appealing for the construction of tightly packed arrays. We measured …
