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Pumped Concrete

Pumped Concrete

Concrete in large quantities can be pumped across long distances for placing in inaccessible sites. This system comprises a hopper that receives concrete from a mixer, a pump to propel the concrete, and pipelines that facilitate its delivery.
For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...

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Updated: May 28, 2026

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

A magnetically driven piston pump for ultra-clean applications.

F LePort¹, R Neilson, P S Barbeau

¹Department of Physics, Stanford University, Stanford, California 94305, USA.

The Review of Scientific Instruments

|November 4, 2011

Summary

This summary is machine-generated.

A new magnetically driven piston pump ensures extreme purity for recirculating xenon gas in the EXO-200 experiment. This advanced pump meets stringent containment needs for sensitive xenon applications.

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Area of Science:

Experimental Physics
Particle Detectors
Cryogenic Systems

Background:

The EXO-200 experiment requires ultra-pure xenon for its liquid xenon time projection chamber.
Recirculation and purification of xenon gas are critical for maintaining detector performance and sensitivity.
Existing pumping technologies may not meet the extreme purity and containment demands.

Purpose of the Study:

To present a novel magnetically driven piston pump designed for xenon gas recirculation.
To demonstrate the pump's capability to meet the stringent purity and containment requirements of experiments like EXO-200.
To characterize the performance of the pump in terms of flow rate and differential pressure.

Main Methods:

Design and construction of a magnetically driven piston pump.
Incorporation of sprung polymer gaskets for sealing and purity.
Testing of the pump with xenon gas to measure flow rate and differential pressure.

Main Results:

The magnetically driven piston pump successfully recirculates xenon gas.
The pump achieves a flow rate exceeding 16 standard liters per minute.
The pump operates effectively with a differential pressure of 750 Torr.
The design satisfies extreme purity and containment requirements.

Conclusions:

The developed magnetically driven piston pump is suitable for recirculating isotopically enriched xenon.
This pump technology meets the demanding purity and containment needs of large liquid xenon detectors.
The pump's performance is adequate for purification systems and time projection chambers in sensitive experiments.