Recent Results for the ECHo Experiment
Recent Results for the ECHo Experiment
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EHo 实验的最新结果
DOI：
10.1007/s10909-016-1541-9
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发表时间：
2016
影响因子：
2
通讯作者：
K. Zuber
中科院分区：
文献类型：
--
作者：
C. Hassel;K. Blaum;T. D. Goodacre;H. Dorrer;C. Düllmann;K. Eberhardt;S. Eliseev;C. Enss;P. Filianin;A. Fäßler;A. Fleischmann;L. Gastaldo;M. Goncharov;D. Hengstler;J. Jochum;K. Johnston;M. Keller;S. Kempf;T. Kieck;U. Köster;M. Krantz;B. Marsh;C. Mokry;Y. Novikov;P. Ranitzsch;S. Rothe;A. Rischka;J. Runke;A. Saenz;F. Schneider;S. Scholl;R. Schüssler;F. Šimkovic;T. Stora;P. Thörle;A. Türler;M. Veinhard;M. Wegner;K. Wendt;K. Zuber
163 Ho电子俘获实验（ECHo）是通过分析163 Ho电子俘获后的量热测量谱来研究亚电子伏特范围内的电子中微子质量的实验。低温金属磁量热计（MMC）阵列，读出微波SQUID复用，将在这个实验中使用。与第一MMC原型具有$^{163}$$163 Ho源离子注入到吸收体中，我们进行了第一次高能量分辨率的测量的EC光谱，这证明了这样的实验的可行性。除了MMC阵列的发展所面临的技术挑战之外，MMC阵列在能量分辨率和带宽方面保持了单像素性能，实验的成功还依赖于大型超纯163 Ho样品的可用性，对预期光谱的精确描述以及背景的识别和减少。我们目前的初步结果与标准的MMC开发的软X射线光谱，maXs-20，其中$$^{163}$$163 Ho离子注入进行使用高纯度的$$^{163}$$163 Ho源先进的化学和质量分离。通过这些测量，我们的目标是确定由于源污染的背景水平的上限，并提供了一个精确的描述量热测量光谱。我们讨论了一个中等规模的实验计划，ECHo-1 k，其中约1000 Bq的高纯度163 Ho离子注入探测器阵列。在一年的测量时间内，我们将能够实现对电子中微子质量的灵敏度低于20 eV/c$^2$$2（90 $$\%$$% C.L.），将现有的极限提高了一个数量级以上。这个实验将指导必要的发展，以达到亚电子伏的灵敏度。
The Electron Capture in $$^{163}$$163Ho experiment, ECHo, is designed to investigate the electron neutrino mass in the sub-eV range by means of the analysis of the calorimetrically measured spectrum following the electron capture (EC) in $$^{163}$$163Ho. Arrays of low-temperature metallic magnetic calorimeters (MMCs), read-out by microwave SQUID multiplexing, will be used in this experiment. With a first MMC prototype having the $$^{163}$$163Ho source ion-implanted into the absorber, we performed the first high energy resolution measurement of the EC spectrum, which demonstrated the feasibility of such an experiment. In addition to the technological challenges for the development of MMC arrays, which preserve the single pixel performance in terms of energy resolution and bandwidth, the success of the experiment relies on the availability of large ultra-pure $$^{163}$$163Ho samples, on the precise description of the expected spectrum, and on the identification and reduction of background. We present preliminary results obtained with standard MMCs developed for soft X-ray spectroscopy, maXs-20, where the $$^{163}$$163Ho ion-implantation was performed using a high-purity $$^{163}$$163Ho source produced by advanced chemical and mass separation. With these measurements, we aim at determining an upper limit for the background level due to source contamination and provide a refined description of the calorimetrically measured spectrum. We discuss the plan for a medium scale experiment, ECHo-1k, in which about $$1000\,\mathrm {Bq}$$1000Bq of high-purity $$^{163}$$163Ho will be ion-implanted into detector arrays. With one year of measuring time, we will be able to achieve a sensitivity on the electron neutrino mass below 20 eV/c$$^2$$2 (90 $$\%$$% C.L.), improving the present limit by more than one order of magnitude. This experiment will guide the necessary developments to reach the sub-eV sensitivity.
PENTATRAP的陷阱设计
DOI：
10.1007/s00340-011-4825-4
发表时间：
2012
期刊：
Applied Physics B
影响因子：
--
作者：
Eliseev;George;Goncharov;Novikov
通讯作者：
Novikov
开发用于高精度测量 187Re 和 163Ho 光谱的金属磁性量热仪
影响因子：
2
作者：
Ranitzsch;P. C.-O;Schäfer;Hengstler
通讯作者：
Hengstler
PENTATRAP：一种新型低温多潘宁阱实验，用于高电荷离子的高精度质量测量
DOI：
10.1007/s00340-011-4823-6
发表时间：
2011
期刊：
Applied Physics B
影响因子：
--
作者：
J. Repp;Ch. Böhm;J.R. Crespo López-Urrutia;A. Dörr;S. Eliseev;S. George;M. Goncharov;Yu. Novikov;C. Roux;S. Sturm;S. Ulmer;K. Blaum
通讯作者：
K. Blaum