synchrotron noun. 
['sɪŋkrǝtrɒn] M20.[from SYNCHRO- + -TRON.]Physics. An accelerator in which electrons or protons gain energy from an alternating electric field as they travel round a closed orbit in a magnetic field, the strength or frequency of the field being increased to keep the radius of the path constant as the particles gain mass relativistically.
 Comb.: 
synchrotron radiation polarized radiation emitted by a charged particle as it spirals at high speed in a magnetic field. 
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