Mechanical testing and development of the helical field coil joint for the Advanced Toroidal Facility
Conference
·
OSTI ID:6294515
The helical field (HF) coil set for the Advanced Toroidal Facility (ATF) is an M = 12, l = 2, constant-ratio torsatron winding consisting of 2 coils, each with 14 turns of heavy copper conductor. The coils are divided into 24 identical segments to facilitate fabrication and minimize the assembly schedule. The segments are connected across through-bolted lap joints that must carry up to 124,000 A per turn for 5 s or 62,500 A steady-state. In addition, the joints must carry the high magnetic and thermal loads induced in the conductor and still fit within the basic 140- by 30-mm copper envelope. Extensive testing and development were undertaken to verify and refine the basic joint design. Tests included assembly force and clamping force for various types of misalignment; joint resistance as a function of clamping force; clamp bolt relaxation due to thermal cycling; fatigue testing of full-size, multiturn joint prototypes; and low-cycle fatigue and tensile tests of annealed CDA102 copper. The required performance parameters and actual test results, as well as the final joint configuration, are presented. 2 refs., 9 figs., 4 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6294515
- Report Number(s):
- CONF-851102-60; ON: DE86005028
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700202* -- Fusion Power Plant Technology-- Magnet Coils & Fields
ATF TORSATRON
BOLTED JOINTS
CLOSED PLASMA DEVICES
COPPER
CREEP
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
FATIGUE
JOINTS
MAGNET COILS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
METALS
STELLARATORS
STRESSES
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TESTING
THERMONUCLEAR DEVICES
TORSATRON STELLARATOR
TRANSITION ELEMENTS
700202* -- Fusion Power Plant Technology-- Magnet Coils & Fields
ATF TORSATRON
BOLTED JOINTS
CLOSED PLASMA DEVICES
COPPER
CREEP
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
FATIGUE
JOINTS
MAGNET COILS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
METALS
STELLARATORS
STRESSES
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TESTING
THERMONUCLEAR DEVICES
TORSATRON STELLARATOR
TRANSITION ELEMENTS