&lt;title&gt;Experimental study of nucleate boiling on surface of cooling channel of silicon crystal&lt;/title&gt;

Usui, Toru; Aizawa, K.; Sano, Yosihiro

doi:10.1117/12.140544

Cited by 2 publications

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“…In a recent report by Usui et al, a measured value of 20 W/cm 2 was reported [8]. This should be compared to water with tTpical CHF values of 200-500 W/cm 2.…”

Section: The Pros and Cons Of Liquid-nitrogen-cooled Optical Componentsmentioning

confidence: 80%

The cryogenic cooling program at the Advanced Photon Source

Rogers¹,

Mills²,

Assoufid³

1994

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This paper describes the experimental and analytical program in cryogenic cooling of high-heat-load optics at the Advanced Photon Source. A prototype liquid nitrogen pumping system has been procured. This pump provides a variable flow rate of 1 to 10 gpm of pressurized liquid nitrogen and is sized to handle up to 5 kW of optic heat load. Also, a high-vacuum, double-crystal monochromator testing tank has been fabricated. This system will be used to test cryogenic crystals at existing synchrotron sources. A finite element analysis has been performed for a cryogenically cooled Si crystal in the inclined geometry for Undulator A at 100 mA. The inclination angle was 80°. It was set to diffract from the <111> planes at the first harmonic energy of 4.2 keV. The maximum slope error in the diffraction plane was calculated to be about I _trad with a peak temperature of 94 K. An analysis has also been performed for a cryogenicallycooled "thin" crystal oriented in the Bragg geometry which accepts 87% of the 1st harmonic photons at 3.866 keV. The total absorbed power was 131 W at 100 mA current and the peak temperature was 124 K.

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“…In a recent report by Usui et al, a measured value of 20 W/cm 2 was reported [8]. This should be compared to water with tTpical CHF values of 200-500 W/cm 2.…”

Section: The Pros and Cons Of Liquid-nitrogen-cooled Optical Componentsmentioning

confidence: 80%

The cryogenic cooling program at the Advanced Photon Source

Rogers¹,

Mills²,

Assoufid³

1994

View full text Add to dashboard Cite

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Numerical Thermal Simulation of Cryogenic Power Modules Under Liquid Nitrogen Cooling

Efstathiadis

Haldar

2005

Journal of Electronic Packaging

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Understanding the thermal performance of power modules under liquid nitrogen cooling is important for the design of cryogenic power electronic systems. When the power device is conducting electrical current, heat is generated due to Joule heating. The heat needs to be efficiently dissipated to the ambient in order to keep the temperature of the device within the allowable range; on the other hand, it would be advantageous to boost the current levels in the power devices to the highest possible level. Projecting the junction temperature of the power module during cryogenic operation is a crucial step in designing the system. In this paper, we present the thermal simulations of two different types of power metal-oxide semiconductor field effect transistor modules used to build a cryogenic inverter under liquid nitrogen pool cooling and discussed their implications on the design of the system.

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<title>Experimental study of nucleate boiling on surface of cooling channel of silicon crystal</title>

Cited by 2 publications

References 0 publications

The cryogenic cooling program at the Advanced Photon Source

The cryogenic cooling program at the Advanced Photon Source

Numerical Thermal Simulation of Cryogenic Power Modules Under Liquid Nitrogen Cooling

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