Helium Argon

[Submitted on 3 Mar 2021 (v1), last revised 9 Mar 2021 (this version, v2)]
  1. Argon can be substituted for helium in welding, and hydrogen can be substituted for helium in some lighter-than-air applications in which the flammable nature of hydrogen is not objectionable. Hydrogen is also being investigated as a substitute for helium in deep-sea diving applications below 1,000 feet.
  2. Chemistry in its element: Listen to the exciting story behind each periodic table element in this podcast collection from Chemistry World.

The Helium Family Loungewear LAST SEASON Stories; Clothing All Clothing All Jackets Down Jackets Coats & Parkas Shell Jackets Mid Layer & Fleece Vests All Sweaters & Tops Hoodies & Sweatshirts T-shirts & Tops Training Tops Dresses & Skirts Polo Shirts Pants Sweatpants Shorts Training Tights The Golf Collection Golf Jackets & Vests. The low-mass WIMPs region (100s MeV/c$^2$ - 10 GeV/c$^2$) has not been fully exploited comparing to high-mass WIMPs (10 GeV/c$^2$ - 1 TeV/c$^2$) experiments which implement liquid xenon or argon TPCs (Time Projection Chambers). The ALETHEIA experiment aims to hunt for low-mass WIMPs with liquid helium-filled TPCs. Helium is the second lightest and second most common element in the universe.It is at the top of the noble gas group in the periodic table. Characteristics and Properties At room temperature helium is an odorless, tasteless, colorless gas.

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Abstract: Dark Matter (DM) is one of the most critical questions to be understood andanswered in fundamental physics today. Observations with varied astronomicaland cosmological technologies already pinned down that DM exists in theUniverse, the Milky Way, and the Solar System. However, the understanding of DMunder the language of elementary physics is still in progress. DM directdetection aims to test the interactive cross-section between galactic DMparticles and an underground detector's nucleons. Although Weakly InteractiveMassive Particles (WIMPs) is the most discussed DM candidate, the null-WIMPsconclusion has been consistently addressed by most convincing experiments inthe field. The low-mass WIMPs region (100s MeV/c$^2$ - 10 GeV/c$^2$) has notbeen fully exploited comparing to high-mass WIMPs (10 GeV/c$^2$ - 1 TeV/c$^2$)experiments which implement liquid xenon or argon TPCs (Time ProjectionChambers). The ALETHEIA experiment aims to hunt for low-mass WIMPs with liquidhelium-filled TPCs. In this paper, we go through the physics motivation oflow-mass DM, the ALETHEIA detector's design, a series of R&D programs thatshould be launched to address a liquid helium TPC's functionality, and possibleanalysis channels available for DM searches.

Submission history

From: Junhui Liao [view email]
[v1] Wed, 3 Mar 2021 03:55:35 UTC (5,176 KB)
[v2]Tue, 9 Mar 2021 04:06:47 UTC (5,176 KB)
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