The performance of the conduction cooled 2G HTS magnet wound without turn to turn insulation generating 4.1 T in 102 mm bore

•Conduction cooled 2G HTS magnet with 102mm RT bore was designed and assembled•22 double pancakes wound with no-insulation winding method.•Assembled coil generate 4.1T at 10K with operating current of 200A.•No-insulation coil showed charging delay phenomenon.•Magnet quenched at 210A by 0.15A/s ramping but showed no degradation.