Author: Feng, G.
Paper Title Page
TUPAB266 Periodic Transient Beam Loading Effects Predicted by a Semi-Analytical Method 2086
 
  • T.L. He, Z.H. Bai, G. Feng, W. Li, W.W. Li, G. Liu, L. Wang, H. Xu, S.C. Zhang
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  In this paper, we im­prove a semi-an­a­lyt­i­cal method, which can be not only used for bunch length­en­ing under equi­lib­rium con­di­tions, but also ap­plied to the pre­dic­tion of a pe­ri­odic tran­sient beam load­ing ef­fect. This pe­ri­odic tran­sient is in­duced by the pres­ence of the pas­sive har­monic cav­ity and might be en­coun­tered under spe­cific con­di­tions for a ul­tra-low emit­tance stor­age ring with a higher beam cur­rent.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB266  
About • paper received ※ 16 May 2021       paper accepted ※ 21 June 2021       issue date ※ 24 August 2021  
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THPAB146 Preliminary Study of Femtosecond Electron Source Based on THz Acceleration and Field Emission 4048
 
  • Zh.X. Tang, G. Feng, B.F. Wei
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  Funding: Work supported by National Natural Science Foundation of China (Grant No. U1832135 and 11805199) and Fundamental Research Funds for the Central Universities (Grant No. WK2310000072)
In this paper, we pro­pose a novel elec­tron gun based on THz ac­cel­er­a­tion and field emis­sion to gen­er­ate fem­tosec­ond elec­tron bunches. The field emis­sion cath­ode is placed in the cen­ter of the cav­ity, and the stand­ing wave field is es­tab­lished in the cav­ity to achieve the field emis­sion con­di­tions and ex­tract the elec­tron beam. Be­cause the pe­riod of THz band is about pi­cosec­ond, the fem­tosec­ond bunch is formed by con­trol­ling the field strength and the pulse width of the ex­tracted beam. We an­a­lyzed the fea­si­bil­ity of field emis­sion and the length of the pulse beam. The sur­face peak field in­ten­sity of the struc­ture of the cav­ity with dif­fer­ent emit­ters are sim­u­lated by CST soft­ware. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB146  
About • paper received ※ 09 May 2021       paper accepted ※ 02 September 2021       issue date ※ 01 September 2021  
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