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Bozhenkov SA, Finken KH, Lehnen M, et al. Main characteristics of the fast disruption mitigation valve. Rev Sci Instrum. 2007;78(3):033503doi: 10.1063/1.2712798.
Bozhenkov, S. A., Finken, K. H., Lehnen, M., & Wolf, R. C. (2007). Main characteristics of the fast disruption mitigation valve. The Review of scientific instruments, 78(3), 033503. https://doi.org/10.1063/1.2712798
Bozhenkov, S A, et al. "Main characteristics of the fast disruption mitigation valve." The Review of scientific instruments vol. 78,3 (2007): 033503. doi: https://doi.org/10.1063/1.2712798
Bozhenkov SA, Finken KH, Lehnen M, Wolf RC. Main characteristics of the fast disruption mitigation valve. Rev Sci Instrum. 2007 Mar;78(3):033503. doi: 10.1063/1.2712798. PMID: 17411181.
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Rev Sci Instrum. 2007 Mar;78(3):033503. doi: 10.1063/1.2712798.

Main characteristics of the fast disruption mitigation valve.

The Review of scientific instruments

S A Bozhenkov, K-H Finken, M Lehnen, R C Wolf

Affiliations

  1. Institute of Plasma Physics, Forschungzentrum Juelich GmbH, EUROATOM-Association, Trilateral Euregio Cluster, D-52425 Juelich, Germany. [email protected]

PMID: 17411181 DOI: 10.1063/1.2712798

Abstract

The article presents a detailed investigation of the fast disruption mitigation valve developed at FZJ Juelich. The essence of this study is the novel direct observation of the piston motion by means of a fast framing camera. The piston stroke and the injection duration are shown to strongly depend on the operational pressure and the used gas. The same is true for the valve throughput. The analysis revealing the leading contribution of the injection duration in this modification is given. The knowledge of the injection duration is also used to reconstruct the characteristic pressure decay rates and the gas outflow rates. The means to increase the gas outflow are discussed. The main found valve characteristics are: (1) valve reaction time, i.e., the delay between the application of the trigger signal and the achievement of reliably observable opening 0.5 mm, is about 0.3 ms; (2) the maximum achieved throughput is 7.5 bar l for argon and 9.5 bar l for helium; (3) the maximum delivery rates are 500 bar l s(-1) for Ar and 1500 bar l s(-1) for He.

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