Liquid Xenon Purification for Dark Matter Detection
用于暗物质检测的液氙纯化
基本信息
- 批准号:0302646
- 负责人:
- 金额:$ 16万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2003
- 资助国家:美国
- 起止时间:2003-08-15 至 2005-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This proposal requests support for a Princeton group to develop a liquid xenon purification technique for a Dark Matter detector. It now appears certain from astrophysical measurements that some 30% of the total amount of material in the universe is composed of some new form of "dark matter". This dark matter is distinct from the atoms that make up the everyday matter we are familiar with, and is so named because it does not emit light, or interact with matter in an ordinary way. Instead, the evidence for dark matter comes from the gravitational attraction this matter exerts in a wide range of astrophysics systems, from galaxies at the small end, to the largest groupings of galaxies known in the universe. Without knowing with certainty what this matter is, it is thought likely that dark matter may occasionally collide with the atoms of ordinary matter. Because our galaxy is also full of dark matter, a sensitive enough particle detector, analogous to a Geiger counter, could see collisions of these particles here on Earth. However, ordinary levels of natural radioactive backgrounds must be reduced enormously for this idea to have a chance of detecting these ghostly particles. A number of groups are developing detectors based on a liquefied form of the inert gas xenon. The liquid xenon will serves as the target to be struck by the dark matter particle. Xenon naturally occurs in air at a low level, and, when separated from air commercially, contains some amount of krypton, another inert gas. A problem is that krypton contains trace amounts of a radioactive isotope, which, while negligible for human health, is a serious problem for xenon-based dark matter experiments. The PI proposes to develop a new method to remove Kr from Xe to the level needed for these experiments.
该提案请求支持普林斯顿小组开发用于暗物质探测器的液氙净化技术。现在,天体物理学测量表明,宇宙物质总量的 30% 左右是由某种新形式的“暗物质”组成。这种暗物质与构成我们所熟悉的日常物质的原子不同,之所以如此命名,是因为它不发光,也不以普通方式与物质相互作用。相反,暗物质存在的证据来自于这种物质在广泛的天体物理系统中所施加的引力,从小端的星系到宇宙中已知的最大的星系团。在不确定这种物质是什么的情况下,人们认为暗物质可能偶尔会与普通物质的原子发生碰撞。因为我们的星系也充满了暗物质,所以足够灵敏的粒子探测器(类似于盖革计数器)可以看到这些粒子在地球上的碰撞。然而,为了使这个想法有机会检测到这些幽灵般的粒子,天然放射性本底的普通水平必须大大降低。许多团体正在开发基于液化形式的惰性气体氙的探测器。液态氙将作为暗物质粒子撞击的目标。氙自然存在于空气中,含量较低,并且在商业上从空气中分离出来时,含有一定量的氪(另一种惰性气体)。问题是氪含有微量的放射性同位素,虽然对人类健康来说可以忽略不计,但对于基于氙的暗物质实验来说却是一个严重的问题。 PI 建议开发一种新方法,将 Xe 中的 Kr 去除到这些实验所需的水平。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Thomas Shutt其他文献
Thomas Shutt的其他文献
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{{ truncateString('Thomas Shutt', 18)}}的其他基金
Development of the LZ Dark Matter Experiment
LZ暗物质实验的进展
- 批准号:
1242579 - 财政年份:2012
- 资助金额:
$ 16万 - 项目类别:
Standard Grant
Experimental Particle Cosmology at Case
案例中的实验粒子宇宙学
- 批准号:
1004661 - 财政年份:2010
- 资助金额:
$ 16万 - 项目类别:
Standard Grant
LZD Development: the LUX-ZEPLIN Multi Tonne Dark Matter Experiment Technical Development Plan for DUSEL
LZD 开发:DUSEL 的 LUX-ZEPLIN 多吨暗物质实验技术开发计划
- 批准号:
0919261 - 财政年份:2009
- 资助金额:
$ 16万 - 项目类别:
Cooperative Agreement
Experimental Particle Cosmology at Case
案例中的实验粒子宇宙学
- 批准号:
0801576 - 财政年份:2008
- 资助金额:
$ 16万 - 项目类别:
Continuing Grant
Construction of the LUX Dark Matter Experiment at the Sanford Underground Science and Engineering Laboratory
桑福德地下科学与工程实验室 LUX 暗物质实验的建设
- 批准号:
0750671 - 财政年份:2008
- 资助金额:
$ 16万 - 项目类别:
Standard Grant
XENON10 Collaboration: Construction and Operation of a Liquid Xe Dark Matter Detector
XENON10 合作:液态 Xe 暗物质探测器的构建和操作
- 批准号:
0502690 - 财政年份:2005
- 资助金额:
$ 16万 - 项目类别:
Continuing Grant
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