Collaborative Research: Direct Search for Dark Matter with Underground Argon at LNGS
合作研究:在 LNGS 中用地下氩直接寻找暗物质
基本信息
- 批准号:1314268
- 负责人:
- 金额:$ 16.5万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2014
- 资助国家:美国
- 起止时间:2014-06-15 至 2019-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The existence of dark matter is inferred from gravitational effects, but its nature remains a deep mystery. One possibility, motivated by considerations in elementary particle physics, is that dark matter consists of the hypothesized Weakly Interacting Massive Particles (WIMPs). It should be possible to detect WIMPs directly, as the orbital motion of the WIMPs composing the dark matter halo pervading the galaxy should result in WIMP-nucleus collisions of sufficient energy to be observable in the laboratory. This collaboration utilizes funds to commission and operate DarkSide-50, a WIMP search using a Liquid Argon Time Projection Chamber (LAr-TPC) with an active mass of 50 kg. DarkSide-50 will use argon extracted from underground sources (Underground Argon, UAr), which this group has shown to have an Ar-39 content lower, by at least a factor of 150, than atmospheric argon. Ar-39 is one of the main sources of background in the experiment.A significant by-product of this group's research has been developing techniques that could find application in areas ranging from national security to medical imaging. This arises from the extraction of rare noble gases (Argon and Helium) from underground sources, and possible applications include the detection of underground nuclear tests and in Environmental Science where Argon is used as a detection media in ultra-low level proportional counter measurements for an environmental radio tracer for hydrologic transport.Liquid argon is an attractive medium for WIMP detection due to its efficient conversion of energy from WIMP-induced nuclear recoils into both ionization and scintillation. The argon scintillation time profile ("pulse shape") depends on the type of ionizing particle, providing particle discrimination that can be used to suppress background. Pulse shape discrimination in argon provides one of the most powerful background rejections among all dark matter technologies; when combined with the measurement of ionization, the background rejection is further enhanced. The proposed activity will advance the development of astroparticle physics and its scientific and educational mission by: (1) offering a continuing excellent opportunity for the training of students, who will contribute to the success of a cutting-edge project; (2) developing techniques that could find application in several areas of benefit to society; and (3) supporting a new education and outreach program, designed to succeed the highly successful Laboratori Nazionali del Gran Sasso-South Dakota-Princeton summer school.
暗物质的存在是从引力效应推断出来的,但其本质仍然是一个深深的谜团。出于基本粒子物理学的考虑,一种可能性是暗物质由假设的弱相互作用大质量粒子(WIMP)组成。直接探测 WIMP 应该是可能的,因为构成遍布星系的暗物质晕的 WIMP 的轨道运动应该会导致 WIMP 与核碰撞,其能量足以在实验室中观测到。此次合作利用资金来调试和运行 DarkSide-50,这是一项 WIMP 搜索,使用活跃质量为 50 公斤的液氩时间投影室 (LAr-TPC)。 DarkSide-50 将使用从地下来源(Underground Argon,UAr)提取的氩气,该小组已证明其 Ar-39 含量比大气氩气低至少 150 倍。 Ar-39 是该实验的主要背景来源之一。该小组研究的一个重要副产品是开发可应用于从国家安全到医学成像等领域的技术。 这是由于从地下来源提取稀有气体(氩气和氦气)而产生的,可能的应用包括地下核试验的检测和环境科学,其中氩气用作超低水平正比计数器测量中的检测介质,用于水文传输的环境无线电示踪剂。液氩是 WIMP 检测的一种有吸引力的介质,因为它能有效地将 WIMP 引起的核反冲的能量转化为两种物质。 电离和闪烁。氩闪烁时间曲线(“脉冲形状”)取决于电离粒子的类型,提供可用于抑制背景的粒子辨别。氩气中的脉冲形状辨别是所有暗物质技术中最强大的背景抑制之一;当与电离测量相结合时,背景抑制进一步增强。拟议的活动将通过以下方式推动天体粒子物理学及其科学和教育使命的发展:(1)为学生的培训提供持续的绝佳机会,他们将为尖端项目的成功做出贡献; (2) 开发可应用于多个造福社会领域的技术; (3) 支持一项新的教育和外展计划,旨在继承非常成功的大萨索国家实验室-南达科他州-普林斯顿暑期学校。
项目成果
期刊论文数量(0)
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Jelena Maricic其他文献
Jelena Maricic的其他文献
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{{ truncateString('Jelena Maricic', 18)}}的其他基金
Collaborative Research: The DarkSide Dark-Matter Search Using Liquid Argon
合作研究:使用液氩进行暗物质搜索
- 批准号:
2310046 - 财政年份:2023
- 资助金额:
$ 16.5万 - 项目类别:
Continuing Grant
Collaborative Research: DarkSide-20k: A Global Program for the Direct Detection of Dark Matter Using Low-Radioactivity Argon
合作研究:DarkSide-20k:使用低放射性氩直接探测暗物质的全球计划
- 批准号:
1812482 - 财政年份:2018
- 资助金额:
$ 16.5万 - 项目类别:
Continuing Grant
CAREER: Enhancing the Precision of the Double Chooz Experiment By Calibration with an Articulated Robotic Arm
职业:通过铰接式机械臂校准来提高 Double Chooz 实验的精度
- 批准号:
1340143 - 财政年份:2013
- 资助金额:
$ 16.5万 - 项目类别:
Continuing Grant
CAREER: Enhancing the Precision of the Double Chooz Experiment By Calibration with an Articulated Robotic Arm
职业:通过铰接式机械臂校准来提高 Double Chooz 实验的精度
- 批准号:
0748544 - 财政年份:2008
- 资助金额:
$ 16.5万 - 项目类别:
Continuing Grant
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