Specifications and performance experience of pool boiling cooled magnets

Satow, T.

doi:10.1016/s0011-2275(98)00102-7

Cited by 15 publications

(10 citation statements)

References 32 publications

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“…Some available experimental data of the breakdown voltage for helium gas are shown in Fig. 15 (a) [104,105]. The solid curve represents a typical Paschen's curve for helium gas obtained by fitting the experimental data using Eq.…”

Section: A High Temperature Operation Schemementioning

confidence: 99%

“…The solid curve represents a typical Paschen's curve for helium gas obtained by fitting the experimental data using Eq. 20 [105,106]. For saturated helium vapor in a two-phase helium detector, the gas density as a function of temperature is known [107].…”

Section: A High Temperature Operation Schemementioning

confidence: 99%

“…(a) The dielectric breakdown voltage in helium gas as a function of the product of the gas density ρ and the electrode separation d. The red circles (•) and the black squares ( ) are experimental data from Ref [104]. and Ref [105],. respectively.…”

mentioning

confidence: 99%

“…respectively. The solid curve represents the Paschen's curve obtained by fitting the experimental data[105,106]. (b) The dielectric breakdown field for saturated helium vapor as a function of temperature.…”

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confidence: 99%

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Concept for a dark matter detector using liquid helium-4

Guo

McKinsey

2013

Phys. Rev. D

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Direct searches for light dark matter particles (mass < 10 GeV) are especially challenging because of the low energies transferred in elastic scattering to typical heavy nuclear targets. We investigate the possibility of using liquid Helium-4 as a target material, taking advantage of the favorable kinematic matching of the Helium nucleus to light dark matter particles. Monte Carlo simulations are performed to calculate the charge, scintillation, and triplet helium molecule signals produced by recoil He ions, for a variety of energies and electric fields. We show that excellent background rejection can be achieved based on the ratios between different signal channels. We also present some concepts for a liquid-helium-based dark matter detector. Key to the proposed approach is the use of a large electric field to extract electrons from the event site, and the amplification of this charge signal, through proportional scintillation, liquid electroluminescence, or roton emission. The sensitivity of the proposed detector to light dark matter particles is estimated for various electric fields and light collection efficiencies.

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Section: A High Temperature Operation Schemementioning

confidence: 99%

Section: A High Temperature Operation Schemementioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Concept for a dark matter detector using liquid helium-4

Guo

McKinsey

2013

Phys. Rev. D

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“…The temperature of liquid helium was changed from 4.2K to (a) Experimental setup (b) Electrode system Referring to the coil structure of large pool cooled SC magnets developed by National Institute of Fusion Science, Japan [5], a parallel plane electrode system was used for the experiments. For the purpose of exploring the effects of the metallic particle on breakdown phenomena, a free or stationary particle was placed in a parallel plane gap of 6.5 cm in length.…”

Section: Experimental Setup and Methodsmentioning

confidence: 99%

DC breakdown voltage characteristics in the presence of metallic particles in saturated liquid helium

Hara

Maeda

Nakagawa

et al.

IEEE International Conference on Dielectric Liquids, 2005. ICDL 2005.

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This paper deals with breakdown voltage characteristics of saturated liquid helium, in the presence of a metallic particle in shape of needle or sphere to obtain insulation design data for the pool-cooled low temperature superconducting coil and to find the factors dominating the breakdown voltage. The results show that the lowest breakdown voltage appears at a free needle particle which produces bubble-generation, rich initial electrons and high stress electric field.

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Insulation Systems for Superconducting Power Devices: Normal Operation Versus Abnormal Conditions

Gerhold¹,

Sumereder

2004

Gaseous Dielectrics X

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Specifications and performance experience of pool boiling cooled magnets

Cited by 15 publications

References 32 publications

Concept for a dark matter detector using liquid helium-4

Concept for a dark matter detector using liquid helium-4

DC breakdown voltage characteristics in the presence of metallic particles in saturated liquid helium

Insulation Systems for Superconducting Power Devices: Normal Operation Versus Abnormal Conditions

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