In the latest construction of the apparatus, the distance from the tungsten filament to the grid was 1-2 mm., the distance from grid to the crucible 10-15 mm., and the electron current was ...

high quality tungsten/molybdenum/tantalum heating element, crucible, wire, tube, and plate; as well as high quality Ti alloy and Nitinol shape memory alloy bar, plate, tube, and wire for medical, ...