34 3, 2010 621.384.6 . E. , E. . E. M. , E. E. , . . , . . , . . , . . , - , ( ). 500—1000 , ) , ( . ). 100—200 r16+, Fe24+ , . 8 Au51+, , 10 . PACS: 41.75.-i; 52.50.-b : , , , , , - . , , . - [1], . - , . 10 1 , — - , - . . , 70—80 % . . , 1/ 2 Q = 1013 IA LM/ EeV , L — . . , , ( ); ( . eV ). 15 , - , . , . . , . . , , , , , 18 . E., E. ., L=1 . 1994 . . . . ( . ) - [2, 3]. - . . . . , 141980, , E-mail: syresin@nusun.jinr.ru I=1 — ( ); IA — = 10 , ., . . , 6. 1 , 5 2—4 . - 2009 . E. E., . ., . ., E. M., . ., . ., 2010 35 3, 2010 . , ( ) , . . , Au79+ E, . 105 - Au69+ , , - . Au77+ 104 Au51+ Au32+ , 103 . 102 . Fe24+ , Au51+, 100—200 [4, 5]. 8 101 1018 r16+, - 1019 1020 1021 1022 1023 j , . 1. ( ) [6—8], , . N /N 25—50 r16+ , 10 Fe24+, . . - . r16+ [9, 10], = 1,5 , j ( Fe24+ . 1). j 2010 . c( , Bg = B/R = ; R = 20 — - B=3T— - 100—200 A/c 2 1 . 8 . ). 1 , . - , , , . 2—3 [11]. - . , - ( /d) d— 5 , rc = 0,5 — = v/ ; , ; H — = , H 1,5 (rc/d) , — . - . . - gun gun R1/2 20 . - 36 3, 2010 J 2 2 Nosc, 2,5—3 Ar16+ - = 4 2Nosc. — Fe24+; Us , , - , E 2 — . : , 0,5 2J + eUs J . 3—3,5 1. , - [10]: , , b > a. [10] 2 Ib0 10 k( E/E) 11 2 1010, k (Ib0/e) (L/(v) — - E/E ; 0,3. 10 Ne = (IeL/ve)(1/4 ) Ie 200 — L = 1,2 — Ne 2 10 , , . . ; . Nmax = (2U L/3e)/(1 + 2 ln(b/a)) b— — [11], . ; . - - , 1012, , - . [12]. . 2. J 30 2,5—3 - 25 , n0/nbo . . 20 15 10 5 0 " 0 0,2 0,4 0,6 0,8 -2" - 1 dE/E , . . “ ” [2, 3]. . 2. “ 3/2” E/E 0,3, n0/nb = k = 11,3 - [2, 3], (“ . 3. ( . . ( 3/2”). , ( . . 2) . E/E J/(eUs + J) 0,3—0,4, . 3, ) , ) ( . . 3, , I = 300 A . . 3, 1) , ). - 37 3, 2010 I = 50 A. , , 22 , Q– = aB3 20 . 3, , - 2) , , . 18 16 14 Q–, . ( 10 E/E 8 0,3—0,4. , 6 - 4 , . ( . 2 , . 3, , 12 0 0,0 1,0 2,0 3,0 4,0 5,0 - 7,0 T, . 4. , " . 6,0 2, 3). 3). Ar16+ " [4, 5]. -2" [2, 3] —" Fe24+, , " : = 0,5 Fe [5] . 24+ = 1,1 8 " Ii = 200 , Ar16+ [4] Ii = 200 . 3. — I = 50 Q– A; — I = 300 6 Q– A; 1—3 — - . Q– = B3 [2, 3] ( : . 4). . 5. — Ar16+ ; " — Fe24+ -2": . 5. , 38 3, 2010 - , Q– B2. [13], – 3 Q B, - , , – . B ). , 10 % , . , . 6. 0,3, E/E , , - . . - ( ) . Au51+, 8 10 0,08 dN/dE [14]. - . 7, 0,10 8 0,06 100 [14]. 0,04 - . 7, 0,02 0,00 . - - 4 (Q . 200 0 1 2 3 [14]. , - . 4 , . 6. 10-12 , . - . Q+ (0,6—0,8)Q–. , Tc/Ti , Ti I 1 Ie 1 2 ln b a v 10 , kIb0 100 — ; 0,6—0,8 — ; 5— . — . — . 7. : ( ; 0,7 : Tc = 150, 450, 550 q = 50,2) 650 39 3, 2010 (4,6 109 (1014 3 - 4+ ). ), 4,9 . - — ( 11 ). 6+ = 29 . 38 % , 1014 - . ISOLDE 11 4. 18 5% - 11 - . 8, ), . 1,7 1013 4+ , 17 % . 10 ) 14 1,5 Q+, ( 4. . 1,1 2 20 11 ( 1 . 20 4+ 11 : , Q+ = , - 3 1 0,5 1 . - 0 0 , 1 2 2 3 4 5 6 t, , , 11 4+ , - 3 . - 1 , 2 4 . " -2" , , [15]. 10 - 1014 - 10 — . . 4+ - 2 . 8, . . 8. : 2 1— : — 10 : ; 2 — Q; 3 — dQ/dt; 1 — H+; 2 — C5+; 3 — C4+; 4 — - 10 90 % 3,5 109 . , . , HIMAC, 3,1 , - 6,4 0,71 . 10 % . , 3+ - 40 11 3, 2010 4+ 1010 . 4 109 1 . . - , =5 . 8 . 2003 . -c ) [6]. ( 6 - 4 4 , , 2 112 - 106 108 110 –2 . , . 2 3 98 102 100 –2 –4 –6 96 –8 1 –4 25—50 , –6 , - –8 . , , . , - , . 9. — : ; — :1— ;2— ;3— 4— , [9, 10] . - , [6], " . 9, . - . 1" [9, 10] , 73,8 . 5 ; , , —1 . - . , , . 3 Ar16+ Fe24+ - 5 2 , . 10 . 10 ( , , . : - - . 9, , . 1—4). - , . " . 1" . , 5 , , 4,2 , . 9, ) - , — 40 . . 41 3, 2010 " . 10 . , 2 - . , 3454. , yi = 8 - -3 ". 10 . , ri = 2 [10]. 6 , = 0,05 = 0,15 , r-n -n , ( i = vi/ , i = i ri2/4 ri yi/4 i i = 10 c — ). , i = = - 25 , , 20 r 5 . " [9, 10, 12]. 1" 2010 . - . - 1. Donets E. D. Physics and Technology of Ion Sources// Ed. by I. G. Brown, Wiley & Sons, NY, 1989. — 245 . 2. . ., . ., . . ; . 2067784 ; ." ", 1996. — 27 . 3. Donets E. D. // J. of Phys.: Conf. Series. 2004. No. 2. P. 213. 4. Donets E. D. et al. Electron String Source of Highly Charged Ions: Studies and First Test on a Synchrotron// EPAC 02. 5. Donets D. E. et al.// Rev. Sci. Instrum. 2004. No. 75. P. 1543. 6. . ., . ., . . // . RU 2 205 467 ; ." ", 2003. 15. 7. Donets . D. et al.// Rev. Sci. Instrum. 2002. No. 73. P. 696. 8. Donets E. E. // J. of Phys.: Conf. Series 2. 2004. No. 97. 9. Donets E. E. et al.// EPAC08. 2008. No. 403. 10. Donets E. D. et al.// HIAT09. 2009. No. E2. 11. Donets E. D. et al.// Review of Scientific Instruments. 2000. V. 71. No. 2. P. 887. 12. . . .// . 2009. . 35. 1. . 1. 13. . ., . . : CCC .1984. . 1225420. 14. Donets D. E. et al.// Review of science instruments. 2009. V. 80. P. 063304. 15. Donets E. D. et al.// HIAT09. 2009. No. E1. Electron-string ion sources of highly charged ions with linear and tubular geometry of string D. E. Donets, E. D. Donets, E. E. Donets, V. . Drobin, V. V. Salnikov, E. M. Syresin, . V. Shabunov, V. B. Shutov Joint Institute for Nuclear Research, 6 J. Curie str., Dubna, Moscow Region, 141980, Russia E-mail: syresin@nusun.jinr.ru Electron string ion sources proposed in JINR are used in several accelerator centers for production of highly charged ions including bare nuclei. In this source the electrons confined in a high magnetic field perform about 100—1000 oscillations between electron gun and reflector. It led to creation of the dense electron plasma (electron string) at a low current of the electrons emitted from the cathode. As result, the dissipated electron power is decreased by 2—3 orders of magnitudes at same electron density in the reflex ion source. Electron string ion sources was used for production of Ar16+, Fe24+ and Au51+ ion beams at current of 100—200 mA in a pulse of about 8 ms. To increase capacity of the ion trap a tubular geometry of the electron string was proposed in JINR which should provide ion output on a level, approaching to 10 mA of Ar16+ ions in the pulse mode. PACS: 41.75.-i; 52.50.-b Keywords: highly charged ion, ion source, electron beam, cathode, electron string, plasma. Bibliography — 15 references. Received 18 November 2009