Self-consistent nonstationary processes in phase-mixed electron beams focused by mobile ions

被引:17
作者
Bliokh, YP [1 ]
Nusinovich, GS
Felsteiner, J
Granatstein, VL
机构
[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel
[2] Univ Maryland, IREAP, College Pk, MD 20742 USA
来源
PHYSICAL REVIEW E | 2002年 / 66卷 / 05期
关键词
Computer simulation - High energy physics - Ionization - Mathematical models - Microwaves - Perturbation techniques - Probability - Velocity measurement;
D O I
10.1103/PhysRevE.66.056503
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
This paper is devoted to the analysis of nonstationary self-consistent processes in electron beam propagation in the presence of mobile ions. This problem is of particular interest for the recently developed plasma-assisted slow-wave oscillators (pasotrons). In pasotrons beam focusing is provided by ions (in contrast to other high-power microwave sources where the beam is focused by a strong external magnetic field). Typically, pasotrons operate in rather long pulses with a pulse duration on the order of 100 mus and larger. In such a time scale, the ion motion can play a significant role, and therefore, the self-consistent nonstationary processes in the beam transport and ion motion become important. In particular, the interaction with beam electrons may result in ion axial acceleration. In the present paper, a theory that describes these nonstationary self-consistent processes is developed, taking account of the phase mixing of electrons having a spread in their initial transverse velocities. The paper also contains some simulation results obtained for typical pasotron parameters.
引用
收藏
页码:10 / 056503
页数:10
相关论文
共 24 条
[1]   Traveling-wave tubes and backward-wave oscillators with weak external magnetic fields [J].
Abu-elfadl, TM ;
Nusinovich, GS ;
Shkvarunets, AG ;
Carmel, Y ;
Antonsen, TM ;
Goebel, D .
PHYSICAL REVIEW E, 2001, 63 (06) :1-066501
[2]  
ABUELFADL TM, IN PRESS IEEE T PLAS
[3]   Magnetically self-focussing streams [J].
Bennett, WH .
PHYSICAL REVIEW, 1934, 45 (12) :0890-0897
[4]   Temporal evolution of electron beam transport in PASOTRON microwave sources [J].
Bliokh, YP ;
Nusinovich, GS .
IEEE TRANSACTIONS ON PLASMA SCIENCE, 2001, 29 (06) :951-959
[5]  
BRIGGS RJ, 1977, 2ND P INT TOP C HIGH, V1, P319
[6]   ELECTRON-BEAM PROPAGATION IN THE ION-FOCUSED REGIME [J].
BUCHANAN, HL .
PHYSICS OF FLUIDS, 1987, 30 (01) :221-231
[7]  
Budker G I., 1956, Proceedings of the CERN Symposium on High Energy Accelerators and Pion Physics, P68
[8]   LASER GUIDING OF ELECTRON-BEAMS IN THE ADVANCED TEST ACCELERATION [J].
CAPORASO, GJ ;
RAINER, F ;
MARTIN, WE ;
PRONO, DS ;
COLE, AG .
PHYSICAL REVIEW LETTERS, 1986, 57 (13) :1591-1594
[9]   SPURIOUS MODULATION OF ELECTRON BEAMS [J].
CUTLER, CC .
PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1956, 44 (01) :61-64
[10]   Pulse shortening causes in high power BWO and TWT microwave sources [J].
Goebel, DM .
IEEE TRANSACTIONS ON PLASMA SCIENCE, 1998, 26 (03) :263-274