Magnet Technology Activities and Status at IMP

Abstract

Many normal conducting magnets are used in Heavy Ion Research Facility in Lanzhou (HIRFL) accelerator's magnet system at Institute of Modern Physics (IMP). The magnet design, fabrication and measurement of Cooling Storage Ring (CSR) are presented. All magnets are done with laminated and welded with 0.5 mm-thick steel sheets. For the dipole of CSR main ring (CSRm) an H type magnet was chosen with an air circle on the pole. For the CSR experimental ring (CSRe) a C type was chosen with an air circle and two air slots on the pole to improve the field homogeneity. All quadrupoles' endplates were made with punched pieces after coating epoxy glue. They were also chamfered directly on ends of the pole to reduce the 12th order contribution of magnetic field. Magnets design and fabrication for heavy ion therapy facility in Lanzhou (HITFiL) will be also described in this paper. Some superconducting magnets research at IMP will be reported too. A super-ferric dipole prototype of FAIR Super-FRS was built and it is been testing. The super-ferric dipole static and ramping magnetic field was measured in IMP. Two superconducting solenoids (3 T and 5 T magnetic field) with a <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\phi 70\ {\rm mm}$</tex></formula> warm bore had been developed to calibrate Hall probe and high field testing, some testing results are reported. And a magnetic field of 7 T Penning Trap system is being developed for precise mass measurements.