Author: Zhou, K.
Paper Title Page
THP053 Steady State Multipacting in a Micro-pulse Electron Gun 851
 
  • K. Zhou, X.Y. Lu, X. Luo, S.W. Quan, Z.Q. Yang, J. Zhao
    PKU, Beijing, People's Republic of China
 
  Mul­ti­pact­ing is a res­o­nant elec­tron dis­charge phe­nom­e­non via sec­ondary elec­tron emis­sion, while mi­cro-pulse elec­tron gun (MPG) uti­lizes the mul­ti­pact­ing cur­rent in a ra­dio-fre­quency (RF) cav­ity to pro­duce short pulse elec­tron beams. The con­cept of MPG has been pro­posed for many years. How­ever, the un­sta­ble op­er­at­ing state of MPG vastly ob­structs its prac­ti­cal ap­pli­ca­tions. This paper pre­sents a study on the steady state mulit­pact­ing in a MPG. The re­quire­ments for steady state mul­ti­pact­ing are pro­posed through the analy­sis of the in­ter­ac­tion be­tween the RF cav­ity and the beam load. Ac­cord­ingly, a MPG cav­ity with the fre­quency of 2856 MHz has been de­signed and con­structed. Var­i­ous kinds of grid-an­odes are tested in our pri­mary ex­per­i­ments. Both the un­sta­ble and sta­ble mul­ti­pact­ing cur­rent have been ob­served. Presently, the sta­ble out­put beam cur­rent has been de­tected at about 12.2 mA. Fur­ther ex­per­i­men­tal study is under way now.  
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