Helios

Helios is the workhorse superconducting magnet with a 6-inch diameter, 24-inch long warm bore. It provides 6.7T at its maximum current of 70A; that's 961 G/A. The main counter array is for solid state work in narrow cryostats, and there is another set of counters for larger samples such as gas cells. Both sets have long light guides and poor timing resolution (>1ns). A new stand and counter system is now being built for Helios Of course all access is axial, but the large bore makes this a versatile magnet. There is no persistence switch so the magnet must be driven constantly. That is actually an asset, because the field tends to be changed frequently in