Engineering design of cryocondensation pumps for the DIII-D Radiative Divertor Program

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A new double-null, slotted divertor configuration will be installed for the DIII-D Radiative Divertor Program at General Atomics in late 1996. Four cryocondensation pumps, three new and one existing, will be part of this new divertor. The purpose of the pumps is to provide plasma density control and to limit the impurities entering the plasma core by providing pumping at each divertor strike point. The three new pumps are based on the design of the existing pump, installed in 1992 as part of the Advanced Divertor Program. The new pumps require geometry modifications to the original design. Therefore, extensive modal ... continued below

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7 p.

Creation Information

Bozek, A.S.; Baxi, C.B.; Del Bene, J.V.; Laughon, G.J.; Reis, E.E.; Shatoff, H.D. et al. October 1, 1995.

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  • General Atomic Company
    Publisher Info: General Atomics, San Diego, CA (United States)
    Place of Publication: San Diego, California

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Description

A new double-null, slotted divertor configuration will be installed for the DIII-D Radiative Divertor Program at General Atomics in late 1996. Four cryocondensation pumps, three new and one existing, will be part of this new divertor. The purpose of the pumps is to provide plasma density control and to limit the impurities entering the plasma core by providing pumping at each divertor strike point. The three new pumps are based on the design of the existing pump, installed in 1992 as part of the Advanced Divertor Program. The new pumps require geometry modifications to the original design. Therefore, extensive modal and dynamic analyses were performed to determine the behavior of these pumps and their helium and nitrogen feed lines during disruption events. Thermal and fluid analyses were also performed to characterize the helium two-phase flow regime in the pumps and their feedlines. A flow testing program was completed to test the change in geometry of the pump feed lines with respect to helium flow stability. The results were compared to the helium thermal and fluid analyses to verify predicted flow regimes and flow stability.

Physical Description

7 p.

Notes

INIS; OSTI as DE97003441

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  • 16. IEEE/NPSS symposium on fusion engineering, Champaign, IL (United States), 30 Sep - 5 Oct 1995

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  • Other: DE97003441
  • Report No.: GA--A22151
  • Report No.: CONF-950956--1
  • Grant Number: AC03-89ER51114
  • Office of Scientific & Technical Information Report Number: 446395
  • Archival Resource Key: ark:/67531/metadc675214

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  • October 1, 1995

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • April 18, 2016, 5:52 p.m.

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Bozek, A.S.; Baxi, C.B.; Del Bene, J.V.; Laughon, G.J.; Reis, E.E.; Shatoff, H.D. et al. Engineering design of cryocondensation pumps for the DIII-D Radiative Divertor Program, article, October 1, 1995; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc675214/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.