Single Magnet Test Results of the First EBT-P Development Magnet
The first development coil (D1) for the ELMO Bumpy Torus Proof-of-Principle (EBT-P) machine was successfully tested1 in a large “bucket” dewar — the “open dewar test”. Since then, it has been welded closed and installed in an individual dewar by a McDonnell Douglas/General Dynamics magnet development team. During the open dewar test, the bath contained 500 to 600 L of liquid helium surrounding the coil. In contrast, there is only a volume of about 15 L left for helium inside the individual dewar. This, plus the heat load introduced by the support structure, changed the cryogenic environment of the coil.
KeywordsLiquid Helium Secondary Coil Ripple Current Quench Threshold Helium Level
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