Lub magnetic teb faib ntawm ib daim hlau nplaum yog qhov yooj yim, feem ntau muaj ob tug sib nqus ncej. Cov kab hluav taws xob sib nqus pib los ntawm tus ncej qaum teb thiab rov qab mus rau sab qab teb ncej, nthuav tawm ib qho kev faib tawm tsis tu ncua. Lub zog magnetic teb muaj zog dua nyob rau hauv cov cheeb tsam ze ntawm tus ncej thiab tsis muaj zog sai sai dua.
Multipole hlau nplaum, ntawm qhov tod tes, muaj ntau cov hlau nplaum sib nqus, ua rau muaj kev sib nqus sib nqus ntau dua. Piv txwv li, ib qho quadrupole hlau nplaum muaj ob lub ntsiab sab qaum teb thiab sab qab teb, nrog rau ob tug ncej nruab nrab. Cov kab hluav taws xob sib nqus sib txuas ntawm cov ncej, ua rau thaj tsam sib nqus denser, thiab lub zog hlau nplaum kuj tseem nyob ze ntawm cov ncej nruab nrab.
Cov hlau nplaum sib nqus ntawm cov hlau nplaum sib nqus tuaj yeem tswj tau thiab hloov kho tau yooj yim dua, ua rau lawv tsim nyog rau cov ntawv thov uas xav tau cov khoom sib nqus siab, xws li cov chaw sib nqus tsom hauv qee cov khoom siv hluav taws xob. Nyob rau hauv sib piv, lub magnetic teb ntawm ib daim hlau nplaum yog qhov yooj yim, thaum cov hlau nplaum multipole tuaj yeem tsim cov qauv sib nqus ntau dua kom tau raws li cov kev xav tau sib txawv.
