Quench heater simulation for protection of superconducting coils

Protection of large energy stored epoxy impregnated magnets requires careful design and analysis of protection heaters which are attached to the winding of a solenoid at a specified radial position (usually the winding outer surface) and at periodic circumferential locations. The heaters can be activated passively or actively depending on the desired protection scheme. The heaters are insulated from the winding by glass cloth and in some cases are sandwiched between the winding and a steel overband for structure support. An update report on the National High Magnetic Field Laboratory (NHMFL) efforts on quench heaters design, simulation and analysis is presented. All protection analysis discussed is based on internal dump.