Документ взят из кэша поисковой машины. Адрес оригинального документа : http://nuclphys.sinp.msu.ru/school/s08/s08_15.pdf Дата изменения: Mon Nov 17 18:56:25 2008 Дата индексирования: Tue Oct 2 00:30:53 2012 Кодировка:

.
. . , ..
. .. Olga1glm@googlemail.com

Relativistic diffractional generators (RDG) are promising sources for generation of longpulsed high power coherent microwave radiation in the centimeter and millimeter wavelengths range. The numerically studies of the multiwave mechanisms of interaction between tubular electron beam and fields of super-dimensional axisymmetric periodical slow-wave structures (SWS) of corrugated waveguide in the frequency range of 2-type oscillations are carried out. The electromagnetic field profiles, mode structure and radiation frequency spectrum are under investigation. We have also revealed the conditions of the RDG generating frequency stabilisation being related to the longitudinal resonances of the SWS surface wave. The resonance bulk field excitation by the frequency close to critical one for the mode of equivalent smooth waveguide is shown to be an additional agent for the generation power boost.

. , , , , , , . . , . 100 [1]. , , . , 20 , [1]. , , . , () 3.5 [2]. , , ~0.1 [1].


, . . . , . [2] , D/~5 (D- , - ) , . , 2- . ( ) . , [3]. . . - 0n- . s
E
,s

=

Hs =



C

n =1 ± n ,s (



n =1 N



N

[C

+ n ,s

( z ,t )E

+ n ,s

- + Cn ,s ( z ,t )E

- n ,s - n ,s

],

[C

+ n ,s

( z ,t )H

+ n ,s

+ C ( z ,t )H

- n ,s

],

,

(1 )

z ,t )

-

c



p,



E ±, s (r , z , t ), H n±, s (r , z , t ) - n
0n- , N- . . -. . , .


D1±s xs+ d d

+

DD1±s

dx s+ dxs- ±- ± + D2 s xs + DD2 s = dz dz
± s

+ ±+ dxs- ± dx s ±- ± B1s xs + BB1s + + B2 s x s + BB2 s dz dz

(2)

C1±s , ± ±* ± s = - j , s ( E n , s ) dV - , x s = ... , =t± Vs C N ,s , j , s - ,

D1±2 s , DD1±2 s , B1±2 s , BB1±2 s - ( ( N в N ) . , , , , (2) . , . . , . , , , , n- . , 2 - , , , . 2- , , -, , . (K-1)- (K- ). [4]. - , , . 1. , 2 1.95 . D/~5 8 - .
d


2- ( 2 1.95 , d- )


d

, ( 2 1 .8 ) .

d









E0

8



0 ,0 1 5 P , . . 0 ,0 1 0



0 ,0 0 5

0 ,0 0 0

- 0 ,0 0 5

- 0 ,0 1 0 1 ,7 1 ,8 1 ,9

2 d / 2 ,0

. 1. - c R = 6 , R = 4 . 7 , R - , R - .
0 ,5
E z, . .

0 ,0

-0 , 5 R R -1 , 0 0 10 20


= 5 .5 =6

l, 3 0

. 2. z .
,


. , , . , E08, . , [1]. , , , . . 2. R =6.0 E08 2-, R =5.5 . , 2- (R =5.5 ), ­ z, .

. 3. . . ,


. . 2- , . .
1. .. , .. , .. , .. « .» : . 1991. 293 c. 2. .., .., .., .., .., .., .., .. .// : . . 6. : . . 1990. .185-205. 3. .. // . . 67, N12, 2003. .1678. 4. .. , .. , .. // . . . 63, N12, 1999, .2316.