Comments on liquid hydrogen absorbers for MICE

Green, Michael A.

doi:10.2172/918909

Cited by 3 publications

(5 citation statements)

References 2 publications

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“…This report and reference [5] demonstrate that a network analysis can be used to study the heat transfer in a liquid hydrogen absorber system. While free convection heat transfer to the inner surface of the absorber case has been demonstrated, the use of a duct to direct the free convection needs to be demonstrated in a three dimensional system.…”

Section: Concluding Commentsmentioning

confidence: 84%

“…[5] show two additional features of this type of heat exchanger problem. The first is the mass flow and average ΔT of the fluid on the free convection side of the heat exchanger will vary approximately as the square root of the heat transferred across the free convection side of the heat exchanger).…”

Section: Figurementioning

confidence: 98%

“…In the thermal network, temperature T is analogous to voltage and heat flow Q is analogous to current in an electrical network (see references [3], [4], and [5]). The thermal resistances are analogous to electrical resistors.…”

Section: The Heat Transfer Modelmentioning

confidence: 99%

“…This means that the maximum temperature variation within an absorber can be as much as 2.5 K. The flow equations and the heat transfer equations for the hydrogen flow case shown in FIGURE 4 are given in Ref. [5]. From these equations, one can calculate the maximum temperature of the sub-cooled hydrogen as a function of the total heat into the system Q T and the mass flow rate of the helium gas m He entering the absorber body from the bottom.…”

Section: Figurementioning

confidence: 99%

See 3 more Smart Citations

A Heat Exchanger between Forced Flow Helium Gas at 14 to 18 K and Liquid Hydrogen at 20 K Circulated by Natural Convection

Green¹,

Ishimoto²,

Lau³

et al. 2004

AIP Conference Proceedings

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The Muon Ionization Cooling Experiment (MICE) has three 350-mm long liquid hydrogen absorbers to reduce the momentum of 200 MeV muons in all directions. The muons are then re-accelerated in the longitudinal direction by 200 MHz RF cavities. The result is cooled muons with a reduced emittance. The energy from the muons is taken up by the liquid hydrogen in the absorber. The hydrogen in the MICE absorbers is cooled by natural convection to the walls of the absorber that are in turn cooled by helium gas that enters at 14 K. This report describes the MICE liquid hydrogen absorber and the heat exchanger between the liquid hydrogen and the helium gas that flows through passages in the absorber wall.

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Section: Concluding Commentsmentioning

confidence: 84%

Section: Figurementioning

confidence: 98%

Section: The Heat Transfer Modelmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

See 2 more Smart Citations

A Heat Exchanger between Forced Flow Helium Gas at 14 to 18 K and Liquid Hydrogen at 20 K Circulated by Natural Convection

Green¹,

Ishimoto²,

Lau³

et al. 2004

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…Free convection hydrogen absorber cooling has been studied using conventional heat transfer methods [2,3]. Conventional heat transfer studies suggest that the inner surface of the liquid hydrogen absorber has to be extended in order to remove anywhere near the 200 to 300 W of beam energy that is required.…”

Section: Introductionmentioning

confidence: 99%