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Title: Design and analysis of the DIII-D radiative divertor water-cooled structures

Abstract

The Radiative Divertor is a major modification to the divertor of DIII-D and is being designed and fabricated for installation in late 1996. The Radiative Divertor Program (RDP) will enhance the dissipative processes in the edge and divertor plasmas to reduce the heat flux and plasma erosion at the divertor target. This approach will have major implications for the heat removal methods used in future devices. The divertor is of slot-type configuration designed to minimize the flow of sputtered and injected impurities back to the core plasma. The new divertor will be composed of toroidally continuous, Inconel 625 water-cooled rings of sandwich construction with an internal water channel, incorporating seam welding to provide the water-to-vacuum seal as well as structural integrity. The divertor structure is designed to withstand electro-magnetic loads as a result of halo currents and induced toroidal currents. It also accommodates the thermal differences experienced during the 400 C bake used on DIII-D. A low Z plasma-facing surface is provided by mechanically attached graphite tiles. Water flow through the rings will inertially cool these tiles which will be subjected to 38 MW, 10 second pulses. Current schedules call for detailed design in 1996 with installation completed in Marchmore » 1997. A full size prototype, one-quarter of one ring, is being built to validate manufacturing techniques, machining, roll-forming, and seam welding. The experience and knowledge gained through the fabrication of the prototype is discussed. The design of the electrically isolated (5 kV) vacuum-to-air water feedthroughs supplying the water-cooled rings is also discussed.« less

Authors:
; ; ; ; ; ; ;  [1]
  1. General Atomics, San Diego, CA (United States)
Publication Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
505979
Report Number(s):
CONF-950905-
ISBN 0-7803-2970-8; TRN: 97:013672
DOE Contract Number:  
AC03-89ER51114
Resource Type:
Conference
Resource Relation:
Conference: 16. IEEE/NPSS symposium on fusion engineering, Champaign, IL (United States), 1-5 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of 1995 IEEE 16. symposium on fusion engineering. Volume 1; Miley, G.H.; Elliott, C. [eds.] [Univ. of Illinois, Urbana, IL (United States). Fusion Studies Lab.]; PB: 886 p.
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; DOUBLET-3 DEVICE; DIVERTORS; DESIGN; COOLING SYSTEMS; THERMONUCLEAR REACTOR MATERIALS; ELECTRIC CURRENTS; COOLANTS

Citation Formats

Hollerbach, M A, Smith, J P, Baxi, C B, Bozek, A S, Chin, E, Phelps, R D, Redler, K M, and Reis, E E. Design and analysis of the DIII-D radiative divertor water-cooled structures. United States: N. p., 1995. Web.
Hollerbach, M A, Smith, J P, Baxi, C B, Bozek, A S, Chin, E, Phelps, R D, Redler, K M, & Reis, E E. Design and analysis of the DIII-D radiative divertor water-cooled structures. United States.
Hollerbach, M A, Smith, J P, Baxi, C B, Bozek, A S, Chin, E, Phelps, R D, Redler, K M, and Reis, E E. 1995. "Design and analysis of the DIII-D radiative divertor water-cooled structures". United States.
@article{osti_505979,
title = {Design and analysis of the DIII-D radiative divertor water-cooled structures},
author = {Hollerbach, M A and Smith, J P and Baxi, C B and Bozek, A S and Chin, E and Phelps, R D and Redler, K M and Reis, E E},
abstractNote = {The Radiative Divertor is a major modification to the divertor of DIII-D and is being designed and fabricated for installation in late 1996. The Radiative Divertor Program (RDP) will enhance the dissipative processes in the edge and divertor plasmas to reduce the heat flux and plasma erosion at the divertor target. This approach will have major implications for the heat removal methods used in future devices. The divertor is of slot-type configuration designed to minimize the flow of sputtered and injected impurities back to the core plasma. The new divertor will be composed of toroidally continuous, Inconel 625 water-cooled rings of sandwich construction with an internal water channel, incorporating seam welding to provide the water-to-vacuum seal as well as structural integrity. The divertor structure is designed to withstand electro-magnetic loads as a result of halo currents and induced toroidal currents. It also accommodates the thermal differences experienced during the 400 C bake used on DIII-D. A low Z plasma-facing surface is provided by mechanically attached graphite tiles. Water flow through the rings will inertially cool these tiles which will be subjected to 38 MW, 10 second pulses. Current schedules call for detailed design in 1996 with installation completed in March 1997. A full size prototype, one-quarter of one ring, is being built to validate manufacturing techniques, machining, roll-forming, and seam welding. The experience and knowledge gained through the fabrication of the prototype is discussed. The design of the electrically isolated (5 kV) vacuum-to-air water feedthroughs supplying the water-cooled rings is also discussed.},
doi = {},
url = {https://www.osti.gov/biblio/505979}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {12}
}

Conference:
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