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The sheet electron beam with a quasi-rectangular cross section has been proposed to carry intense current. Obviously different from the elliptical sheet electron beam with the same high aspect ratio, this kind of beam is almost uniform in thickness, and can be generated by the cold metal cathode. Besides, the uniform thickness leads to uniform beam power in the horizontal direction, implying less modes but better counteraction between the beam and microwave. In addition, the uniform thickness make the width of the propagation system,including the cold cathode, the microwave cavities and the focusing magnets,easily changed. Firstly,the space-charge electric field of the sheet electron beam was analyzed numerically, then the focusing magnets, including the periodic cusped magnets and quadrupole magnets, were designed according to the space-charge electric field for beam matching. To validate the above theoretical analysis, particle-in-cell simulation was performed, which shows that the 300 keV, 3 kA sheet electron beam can be well focused by the 0.163 T periodic cusped magnetic fields with the 0.064 T quadrupole magnetic fields. More than 98% of the total current has been propagated through the distance of 300 mm.
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Keywords:
- quasi-rectangular cross section /
- intense relativistic sheet electron beam /
- propagation /
- periodic cusped magnetic fields
[1] Kyhl R L, Webster H F 1956 IEEE Trans. Electron Dev. ED-3 172
[2] Webster H F 1955 J. Appl. Phys. 26 1386
[3] Davidson R C, Tsang K T, Uhm H S 1988 Phys. Fluids 31 1727
[4] Uhm H S, Shahar B M, Yu D 1994 Phys. Plasmas 1 3686
[5] Booske J H, McVey B D, Antonsen Jr T M 1993 J. Appl. Phys. 73 4140
[6] Read M E, Jabotinski V, Miram G, Ives L 2005 IEEE Trans. Plasma Sci. 33 647
[7] Cheng S, Destler W W, Granatstein V L, Antonsen Jr T M, Levush B, Rodgers J, Zhang Z X 1996 IEEE Trans. Plasma Sci. 24 750
[8] Booske J H, Radack D J, Antonsen Jr T M, Bidwell S W, Carmel Y, Destler W W, Freund H P, Granatstein V L, Latham P E, Levush B, Mayergoyz I D, Serbeto A 1990 IEEE Trans. Plasma Sci. 18 399
[9] Carlsten B E, Earley L M, Haynes W B, Wheat R M 2002 AIP Conf. Proc. 625 117
[10] Wang S Z, Wang Y, Ding Y G, Ruan C J 2007 High Power Laser and Particle Beams 19 1517 (in Chinese) [王树忠、王 勇、丁耀根、阮存军 2007 强激光与粒子束 19 1517]
[11] Scheitrum G 2006 AIP Conf. Proc. 807 120
[12] Danly B G,Petillo J J,Qiu J X,Levush B 2006 IEEE International Vacuum Electronics Conference,Held Jointly with 2006 IEEE International Vacuum Electron Sources pp115, 116
[13] Department of Energy, Washington, DC 2005 NTIS Accession: DE2005831150
[14] Zhao D 2010 Acta Phys. Sin. 59 1712 (in Chinese) [赵 鼎 2010 59 1712]
[15] Du G X, Qian B L 2009 High Power Laser and Particle Beams 21 889 (in Chinese) [杜广星、钱宝良 2009 强激光与粒子束 21 889]
[16] Du G X, Qian B L 2009 Acta Phys. Sin.59 1726 (in Chinese) [杜广星、钱宝良 2009 59 1726]
[17] Booske J H, Basten M A, Kumbasar A H, Antonsen Jr T M, Bidwell S W, Carmel Y, Destler W W, Granatstein V L, Radack D J 1994 Phys. Plasmas 1 1714
[18] Basten M A, Booske J H 1999 J. Appl. Phys. 85 6313
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[1] Kyhl R L, Webster H F 1956 IEEE Trans. Electron Dev. ED-3 172
[2] Webster H F 1955 J. Appl. Phys. 26 1386
[3] Davidson R C, Tsang K T, Uhm H S 1988 Phys. Fluids 31 1727
[4] Uhm H S, Shahar B M, Yu D 1994 Phys. Plasmas 1 3686
[5] Booske J H, McVey B D, Antonsen Jr T M 1993 J. Appl. Phys. 73 4140
[6] Read M E, Jabotinski V, Miram G, Ives L 2005 IEEE Trans. Plasma Sci. 33 647
[7] Cheng S, Destler W W, Granatstein V L, Antonsen Jr T M, Levush B, Rodgers J, Zhang Z X 1996 IEEE Trans. Plasma Sci. 24 750
[8] Booske J H, Radack D J, Antonsen Jr T M, Bidwell S W, Carmel Y, Destler W W, Freund H P, Granatstein V L, Latham P E, Levush B, Mayergoyz I D, Serbeto A 1990 IEEE Trans. Plasma Sci. 18 399
[9] Carlsten B E, Earley L M, Haynes W B, Wheat R M 2002 AIP Conf. Proc. 625 117
[10] Wang S Z, Wang Y, Ding Y G, Ruan C J 2007 High Power Laser and Particle Beams 19 1517 (in Chinese) [王树忠、王 勇、丁耀根、阮存军 2007 强激光与粒子束 19 1517]
[11] Scheitrum G 2006 AIP Conf. Proc. 807 120
[12] Danly B G,Petillo J J,Qiu J X,Levush B 2006 IEEE International Vacuum Electronics Conference,Held Jointly with 2006 IEEE International Vacuum Electron Sources pp115, 116
[13] Department of Energy, Washington, DC 2005 NTIS Accession: DE2005831150
[14] Zhao D 2010 Acta Phys. Sin. 59 1712 (in Chinese) [赵 鼎 2010 59 1712]
[15] Du G X, Qian B L 2009 High Power Laser and Particle Beams 21 889 (in Chinese) [杜广星、钱宝良 2009 强激光与粒子束 21 889]
[16] Du G X, Qian B L 2009 Acta Phys. Sin.59 1726 (in Chinese) [杜广星、钱宝良 2009 59 1726]
[17] Booske J H, Basten M A, Kumbasar A H, Antonsen Jr T M, Bidwell S W, Carmel Y, Destler W W, Granatstein V L, Radack D J 1994 Phys. Plasmas 1 1714
[18] Basten M A, Booske J H 1999 J. Appl. Phys. 85 6313
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