Abstract: Inengineeringapplications，thetraditionalwatercooledcoppermagnetcoilsprovidingappliedfieldhavemanydefectssuchaslargevolume，bigmassandhighpowerdissipation，sotheapplicationoftinyvolumeandsmallmasshightemperaturesuperconductor(HTS)coilsonappliedfieldmagnetoplasmadynamicthruster（AFMPDT）isfocusedon.AnHTScoilbyBi2333/Agwasdesignedtosatisfythedemandof02Tcentermagneticfieldstrengthwhichconsistsofthreedoublepancakecoils.TheHTScoilis30mminheight，witha160mminnerdiameter.Tostudytheelectromagneticpropertiesofthecoil, acriticalcurrenttestingsystemwasbuiltbasedontheprincipleofelectrictransportmethod.TheexperimentalresultsshowthatdifferentpancakeshavedifferentcriticalcurrentIC，andmiddlepancakehasthehighestICvalue.Theironplateshavepositiveinfluenceonthecoilelectromagneticproperties，andcanimproveICvalueby42%.Meanwhile，usingelectromagneticsimulationmethod，theeffectofironplatessizeandpositionontheperformancesoftheHTScoilwasresearched，andanoptimizeddesignwassummarized.

Key words: magnetoplasmadynamicthruster, hightemperaturesuperconductorcoil, criticalcurrentmeasurement, electromagneticsimulation, optimaldesign