Thermal and electrical joint test for the helical field coils in the Advanced Toroidal Facility

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Initial feasibility studies of a number of configurations for the Advanced Toroidal Facility (ATF) resulted in the selection of a resistive copper continuous-coil torsatron as the optimum device considering the physics program, cost, and schedule. Further conceptual design work was directed toward optimization of this configuration and, if possible, a shorter schedule. It soon became obvious that in order to shorten the schedule, a number of design and fabrication activities should proceed in parallel. This was most critical for the vacuum vessel and the helical field (HF) coils. If the HF coils were wound in place on a completed vacuum ... continued below

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Pages: 5

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Brown, R.L. & Johnson, R.L. January 1, 1985.

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Initial feasibility studies of a number of configurations for the Advanced Toroidal Facility (ATF) resulted in the selection of a resistive copper continuous-coil torsatron as the optimum device considering the physics program, cost, and schedule. Further conceptual design work was directed toward optimization of this configuration and, if possible, a shorter schedule. It soon became obvious that in order to shorten the schedule, a number of design and fabrication activities should proceed in parallel. This was most critical for the vacuum vessel and the helical field (HF) coils. If the HF coils were wound in place on a completed vacuum vessel, the overall schedule would be significantly (greater than or equal to12 months) longer. The approach of parallel scheduel paths requires that the HF coils be segmented into parts of less than or equal to180 of poloidal angle and that joints be made on a turn-by-turn basis when the segments are installed. It was obvious from the outset that the compact and complex geometry of the joint design presented a special challenge in the areas of reliability, assembly, maintenance, disassembly, and cost. Also, electrical, thermal, and force excursions are significant for these joints. A number of soldered, welded, brazed, electroplated, and bolted joints were evaluated. The evaluations examined fabrication feasibility and complexity, thermal-electrical performance at approximately two-thirds of the steady-state design conditions, and installation and assembly processes. Results of the thermal-electrical tests were analyzed and extrapolated to predict performance at peak design parameters. The final selection was a lap-type joint clamped with insulated bolts that pass through the winding packing. 3 refs., 4 figs.

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Pages: 5

Notes

NTIS, PC A02/MF A01; 1.

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  • 11. symposium on engineering problems in fusion research, Austin, TX, USA, 18 Nov 1985

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  • Other: DE86005589
  • Report No.: CONF-851102-82
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 6171394
  • Archival Resource Key: ark:/67531/metadc1110869

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1985

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • May 23, 2018, 1:26 p.m.

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Brown, R.L. & Johnson, R.L. Thermal and electrical joint test for the helical field coils in the Advanced Toroidal Facility, article, January 1, 1985; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1110869/: accessed August 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.