2_1_激光驱动的类氖锗19_6nmX光激光_英文_

2_1_激光驱动的类氖锗19_6nmX光激光_英文_ 第 17 卷 第 9 期 强 激 光 与 粒 子 束 Vol . 17 ,No . 9 L A S ER A ND PA R T ICL E B EA M S 2005 年 9 月H I GH PO W ER Sep . ,2005 () Article ID : 100124322 20050921344205 Ne2l ike Ge 19 . 6 n m X2ra y la ser dr iven 3 ωω by 21pumping scheme 1 2 2Q IAO Xi u2mei, Z HA N G Guo2pi ng, Z HA N G Ta n2xi n ( 1 . Gra d u ate S c hool o f Chi na A ca de m y o f En g i nee ri n g Ph y sics , P. O. B o x 2101 , B ei j i n g 100088 , Chi na; )2 . I nst i t ute o f A p p l ie d P h y si cs an d Com p ut at i onal M at he m at ics , P. O. B o x 8009 , B ei j i n g 100088 , Chi na Abstract : Theo retical st udy of Ne2like X2ray la ser may p ro vide i nsight into t he Ni2like X2ray la ser . A se2 ωω( ) ries of TC E t ransient colli sio nal excitatio nNe2like Ge X2ray la ser exp eriment s driven by 21p ul se s were de2 signed a nd t he Ne2like Ge 19 . 6 nm X2ray la ser p ro duced in t hi s way wa s mo deled wit h t he newly developed co de serie s . The pla sma stat us in t he gain regio n wa s p re sented a nd t he cha racteri stic s of t he X2ray la ser co mp ared to ωω t hat of t he X2ray la ser driven by t he 11driving scheme wa s given. ωωKey words : Tra nsient colli sio nal excitatio n ; X2ray la ser ; Ne2like Ge ; 21p umping scheme CLC number : TN24 Document code : A [ 1 ] Si nce t he fi r st de mo n st ratio n of sof t X2ray la ser i n 1984i n L L NL , e xt e n sive e xp eri me nt al a nd t heo reti2 cal wo r k ha s bee n do ne a nd si gnifica nt a dva nce s have bee n ma de . Scali ng to sho r t er wavele ngt h ha s bee n a2 chieved t hro ugh t he u se of hi gh Z t a r get allo wi ng t he efficie nt op eratio n of Ni2 o r Ne2li ke X2ra y la se r s , a nd [ 2,4 ] ( sat urat e d la si ng a s sho rt a s 5 . 9 nm X2ra y la ser ha s bee n o b ser ve d. The rece nt l y p ropo se d TC E t ra n sie nt [ 3 ] ) colli sio nal e xcit atio nsche me reduce s t he drivi ng e ner gya nd t he la si ng wa vele ngt h do w n to 7 . 3 n m X2ra y [ 5,7 ] la se r , w hich sugge st s t he TC E sc he me be a p ro mi si ng sc he me fo r get ti ng sat urat ed op eratio n of X2ra y la2 - 1 ser at t he wat er2wi ndo w wavele ngt h . In t he TC E sche me , a gai n la r ger t ha n 100 cm i s p ro duced nea r t he [ 8,11 ] critical surf ace. Ho wever , it co nt ri but e s lit t le to t he o utp ut beca u se of severe ref ractio n re sult e d f ro m [ 12 ] t he la r ge elect ro n de n sit y gra die nt i n t hi s re gio n. To i mp ro ve t he X2ra y la ser p rop a gatio n i n p la sma a nd to efficie nt l y ma ke u se of t he hi gh gai n nea r t he ωω critical de n sit y re gio n , ref ere nce [ 13 ] t a ke s 21drivi ng sche me to i r ra diat e A g sla b t a r get , t hat i s , t he p re2 p ul se i s do uble f reque ncy w hile t he sho r t heati ng p ul se i s ba se2f reque ncy. A s t he critical elect ro n de n sit y i s p 2 ωωωropo r tio nal to , here i s t he f reque ncy of t he i nci de nce la se r . The critical de n sit y fo r t he 2la se r p ul se i s t wo ωti me s a s la r ge a s t he o ne co r re spo ndi ng to 1p umpi ng p ul se . The elect ro n de n sit y gra die nt nea r t he criti2 ω cal surf ace fo r 1p ul se i s re duced a nd a hi gh gai n val ue i n t hi s re gio n i s e xp ect ed. 1 Experimental design A s t he TC E co de serie s fo r Ni2li ke Ta X2ray la se r i s no w u na vaila ble to u s , t heo retical st udy of TC E Ne2 li ke Ge 19 . 6 n m X2ray la ser ma y p ro vi de u s so me i n si ght . The o ne di me n sio nal hydro dyna mic co de J B19 , a2 to mic co de N61 a nd ray2t raci ng co de XPB A co n stit ut e a co mp let e co de2serie s to mo del t he p ro ductio n of TC E Ne2li ke Ge 19 . 6 nm X2ray la se r , w hich i s newl y develop e d i n In stit ut e of App lied Physic s a nd Co mp ut atio nal [ 14 ] [ 15 ,16 ] ( ) Mat he matic s IA PCMba se d o n t he p revio u s co de2serie s fo r Q SS Ne2li ke Ge.The t heo retical re sult [ 17 ] a gree s well wit h t he e xp e ri me nt al dat a . In t hi s p ap e r , we si mulat e wit h o ur co de2serie s t he Ne2li ke Ge 191 6 n m X2ray la ser by t ra n sver sel y i r ra diati ng t he 0 . 9 c m lo ng Ge sla b t a r get wit h t wo 250 p s N d2gla ss la se r μp ul se s follo wed 0 p s lat e r by a 1 p s , 10 J hi gh i nt e n sit y drive p ul se , p ro duci ng a foc u s li ne a bo ut 100m wi de ω a nd 1 c m lo ng. The to t al e ner gy of t he t wo lo ng p ul se s i s 18 J . The t wo p rep ul se s a re 2Ga u ssia n p ul se s at 3 Received date :2005201213 ; Revised date :2005207218 ( )Foundation item :suppo rt ed by t he Natio nal High2t ech Re sea rch a nd Develop ment Pla n 863 ( ) Biogra phy :Qiao Xi u mei 1976 —, f e male , Ph . D , engaged i n t heo retical st udy of X2ray la ser ; E2mail : xi u meiq123 @163 . co m 。 μωμ0 . 526 5 m i n wavele ngt h , w hile t he sho r t p ul se i s 1p ul se at 1 . 053 m. The p ea k to p ea k dela y ti me be2 t wee n t he t wo p rep ul se s i s 4 . 50 n s , a nd t he e ner gy ratio i s 0 . 03 . Q ua si t raveli ng wave p ump fo r t he sho rt p ul se i s a dop t ed by u si ng a st ep mi r ro r . 2 Model ing result The o ne di me n sio nal hydro dyna mic co de J B19 i s u se d to calculat e t he hydro dyna mic evol utio n of t he p la sma a nd to p ro vi de t e mp erat ure s a nd de n sitie s to t he rece nt l y develop e d N61 co de , w hich p e rfo r m s t he ki2 netic s calc ulatio n s to det er mi ne t he gai n . The 37 fi ne st r uct ure level s i n t he Ne2li ke Ge , 113 fi ne st r uct ure level s i n F2li ke Ge wit h mai n qua nt um number n up to 3 a nd 12 fi ne st r uct ure level s i n Na2li ke Ge wit h mai n qua nt um numbe r n up to 4 a re co n si dered , fo r w hich t he level e ne r gie s , elect ro n colli sio nal e xcit atio n rat e s a nd ra diatio n rat e s a re p ro vi ded by t he A to mic Gro up of In stit ut e of App lied Physic s a nd Co mp ut atio nal ( ) Mat he matic s IA PCM. Fo r hi gher e xcit ed st at e s a s well a s o t her io n s , t he e ner gie s a re calculat e d u si ng t he scree ne d hydro ge nic mo del . The colli sio nal a nd ra diative rat e s a re e sti mat ed u si ng e mpi rical fo r mula s. To get t he o utp ut i nt e n sit y , t he re sult s a re po st2p roce ssed by t he t wo2di me n sio nal p a ra xial ra y2t raci ng co de XPBA . ( ) ( ) () ( )Fi g. 1 Elect ro n den sities a, f ractio n of Ne2li ke io ns b, gai n cand elect ro n t emperat ure d ver su s di st ance f ro m t a r get surf ace w hen X2ray la ser i nt ensit y p ea k s. ωωωωThe t ar get surf ace i s locat ed at zero i n t he ho rizo nt al a xi s. The do t t ed li ne i s fo r t he 11ca se a nd t he solid li ne fo r 21ca se () ( Fi g . 1 asho w s t he di st ri butio n of t he elect ro n de n sit y ve r su s t he di st a nce f ro m t he t a r get surf ace soli d ) li neat t he ti me t he o utp ut X2ray la ser i nt e n sit y p ea k s. To sho w t he a dva nt a ge s of t hi s sc he me , we al so ( ) p re se nt s t he co r re spo ndi ng re sult s i n ref e re nce [ 17 ] do t t ed li ne, w hich i s drive n al mo st at t he sa me co ndi2 ωω tio n e xcep t t hat t he t wo p rep ul se s a re ba se f reque ncy wit h 10 J e ne r gy w hich we call 11drivi ng sche me . ω ω ω We ca n see t hat fo r t he 21drivi ng sc he me , t he elect ro n de n sit y nea r t he critical surf ace of t he 1la se r p ωω ul se i s muc h smoo t her t ha n t hat fo r t he 11drivi ng sche me , w hic h i s e xp ect ed to eff ectivel y reduce t he eff ( ) ect of ref ractio n i n t hi s re gio n a nd to co nt ri but e to t he o utp ut of X2ra y la se r . Fi g. 1 csho w s t he gai n at ωωμ( t he sa me ti me fo r t he t wo ca se s. It o bvio u sl y sho w s t hat fo r t he 21ca se , t he re e xi st s a f lat regio n 15 m - 1 μ) to 35 m f ro m t he t a r get surf acew here t he gai n i s la r ger t ha n 35 c m , w hic h co nt ri but e s mo st to t he o ut2 μp ut . O ut si de t hi s regio n , t he gai n slo wl y f all s to zero at 50 m f ro m t he t a r get surf ace . O n t he o t he r ha nd , ωωt he gai n fo r t he 11ca se decrea se s much f a st e r , t he mai n gai n re gio n w hich co nt ri but e s mo st to t he o utp ut - 1 20 μi s locat e d at 25,15 m f ro m t he t a r get surf ace wit h gai n of 20 c m a nd elect ro n de n sit y le ss t ha n 5 ×10 强 激 光 与 粒 子 束 1346 第 17 卷 - 3 ( ) ( ) cm . Fi g . 1 da nd Fi g. 1 bsho w t he elect ro n t e mp erat ure a nd f ractio n of Ne2li ke io n a s a f unctio n of t he di st a nce . Eno ugh Ne2li ke io n s a re p ro duce d i n bo t h sche me s , but t he elect ro n t e mp erat ure i n t he mai n gai n ωω regio n fo r t he 21sche me i s sli ght l y hi ghe r . [ 18 ] ωω Fig . 2 sho w s t he o utp ut i nt e n sit y ver su s t he t a r get le ngt h ba sed o n t he L i nfo r d fo r mula fo r t he 21 - 1 - 1 ωω drivi ng sche me . The gai n achieved i s 33 . 1 cm , w hic h i s la r ger t ha n 19 . 5 c m i n t he 11sc he me . If t he μt a r get le ngt h t a ke s 0 . 5 c m , t he gai n2le ngt h p ro duct i s 16 . 5 , a nd t he o utp ut e ne r gy i s a bo ut 16 . 8J , t he sat2 uratio n ca n be achieved. O ne va ria nce t hat ma nif e st s t he p umpi ng efficie ncy i s t he ratio bet wee n t he gai n2 - 1 ωω le ngt h p ro duct a nd t he to t al p umpi ng e ne r gy , fo r t he 21sc he me , t he val ue i s 1 . 65 J , w hic h i s la r ge r - 1 ωω t ha n 0 . 88 J i n 11sc he me . ωωFig . 3 sho w s t he ray t raci ng of t he X2ray li ne w hic h sa mp le s t he la r ge st gai n2le ngt h p ro duct fo r 21 ( ) ωω ( ) ωω soli d li nea nd 11do t li nesche me s. We ca n see t hat fo r t he 21drivi ng sche me , t he sho rt e st di st a nce 20 - 3 μf ro m t he t a r get surf ace t hi s li ne ca n get i s 19 . 4m , w here t he elect ro n de n sit y i s 8 . 4 ×10cm , a nd t he lo2 - 1 cal gai n i s 42 c m , w hich sugge st s t hat t he high gai n re gio n co nt ri but e s to t he o utp ut a s t he re sult of t he re2 - 1 duce d ref ractio n nea r t he critical surf ace . The a ve ra ge gai n val ue t hi s li ne sa mp le s i s la r ger t ha n 35 c m , wit h t he elect ro n t e mp erat ure no le ss t ha n 1 . 5 keV a nd 70 % of Ne2li ke io n s. The gai n2le ngt h p ro duct it sa m2 - 1 ωωp le s i s 36 . 4 . Fo r t he 11drivi ng ca se , t he la r ge st gai n t hi s li ne sa mp le s i s o nl y 32 c m , w here t he elect ro n t e 20 - 3 mp e rat ure i s 1 . 76 keV , t he elect ro n de n sit y i s 4 . 7 ×10cm a nd t he f ractio n of Ne2li ke io n s i s 0 . 68 , a nd t he μ( )gai n2le ngt h p ro duct it sa mp le s i s o nl y 21 . 5 . It ca n be see n t hat t hi s li ne i s be nt by a bo ut 23m do t li ne μ( ) a nd a bo ut 19 m soli d li nere sp ectivel y af t er p rop a gati ng 4 . 5 mm i n t he p la sma s , w hich sugge st s t hat it ωω ha s e xp e rie nce d la r ger ref ractio n eff ect i n 21sche me . The o utp ut a ngle s of t hi s li ne a re 10 . 0 mra d a nd 71 1 ωω ωω mra d fo r 21a nd 11re sp ectivel y . ωω ( Fig . 4 sho w s t he ti me2i nt egrat ed o utp ut i nt e n sit y a s a f unctio n of t he ref ractio n a ngle fo r 21soli d li ) ωω ( ) ωωnea nd 11do t li nedrivi ng sc he me s re sp ectivel y. O ne ca n see t hat fo r t he 21ca se , t he o utp ut i nt e n2 sit y ri se s slo wl y wit h t he i ncrea se of ref ractio n a ngle . It p ea k s at 12 . 3 mra d a nd t he n quic kl y drop s to ze ro at ωωωω 15 mra d. Co mp a re d wit h t he sha rp p ea k i n 21, t he o utp ut i nt e n sit y fo r t he 11drivi ng sc he me p ea k s at a relativel y smaller a ngle , 6 . 8 mra d. In o r der to ill u st rat e t he rea so n fo r t he la r ge ref ractio n a ngle he re , we no w loo k at t he va ria nce of t he elect ro n de n sit y a nd t he gai n a s a f unctio n of t he di st a nce f ro m t he t a r get sur2 ( ) f ace w he n t he X2ra y la se r’s i nt e n sit y p ea k s a s sho w n i n Fi g. 1 soli d li ne. O ne ca n see t hat t here a re t wo re2 μgio n s t hat t he elect ro n de n sit y va rie s diff e re ntl y . O ne i s at 13,27m f ro m t he t a r get surf ace , w he re t he av2 23 - 4 era ge elect ro n de n sit y gra die nt i s 1 . 57 ×10c m . The X2ray la ser li ne i s be nt o ut of t hi s regio n af t er p rop a2gati ng 6 . 6 mm. It leave s t he t a r get wit h 12 . 1 mra d o utp ut a ngle af t er p rop a gati ng 4 . 5 mm i n t he p la sma a s ( ) μsho w n i n Fi g . 5 soli d li ne. The o t he r re gio n locat e s f a r t her t ha n 28 m f ro m t he t a r get surf ace . The local gai n drop s f a st a s a re sult of t he quick decrea se of t he elect ro n de n sit y wit h t he i ncrea se of t he di st a nce f ro m 23 - 4 t he t a r get surf ace . The avera ge elect ro n de n sit y gra die nt i s 2 . 70 ×10cm . The X2ra y la se r li ne e xp e ri2 e ( ) nce s la r ge ref ractio n a s sho w n i n fig . 5 do t li ne. We ca n saf el y sa y t hat a la r ge a mo unt of X2ra y la se r li ne s under go t wo diff ere nt re gio n s. In o t he r wo r ds , t he la ser li ne s eit he r o ri gi nat e i n t he st eep re gio n a nd t he n p rop a gat e i nto t he a bo ve lo w2gra die nt regio n wit h la r ge a ngle af t e r p rop a gati ng a sho r t di st a nce o r st a r t i n t he lo w2gra die nt re gio n a nd p rop a gat e a relativel y lo nge r di st a nce a nd e nt e r i nto t he st eep re gio n . 3 Summary ωWe si mulat e t he Ne2li ke Ge 19 . 6 n m X2ray la ser drive n by t wo 2p rep ul se s a nd af t er so me delay ti me by ω ωωa 1sho r t p ul se . We co mp a re t he re sult s wit h t he co r re spo ndi ng re sult s drive n by 11p ul se s. It sho w s t hat ωω t he 21drivi ng sche me ca n eff ectivel y reduce t he ref ractio n eff ect nea r t he critical surf ace . The si mulatio n i 21 ndicat e s t hat t he gai n regio n w hic h co nt ri but e s to t he o utp ut i nt e n sit y i s shif t e d f ro m le ss t ha n 0 . 6 ×10cm - 3 21 - 3 to la r ger t ha n 0 . 8 ×10cm . If we do no t co n si der t he lo ss of t he do uble f reque ncy of t he t wo p re2 - 1 - 1 ωω ωωp ul se s , t he p umpi ng efficie ncy of t he 21sc he me i s 1 . 65 J , la r ger t ha n t he 0 . 88 J i n 11ca se . Co m2 p a ωωωω red wit h t he 11drivi ng sche me , t he 21drivi ng sche me eff ectivel y re duce s t he elect ro n de n sit y gra die nt nea r t ωω he critical surf ace a nd so it ca n e xt ract e ner gy i n t he gai n re gio n w hich , i n t he 11drivi ng sche me , co nt ri ωω ωω but e s lit t le to t he o utp ut . In t hi s se n se , t he 21drivi ng sche me i s a dva nt a geo u s o ver t he 11sche me , a nd it co ul d be a way to wa r d sho r t er wavele ngt h X2ray la se r wit h hi gh Z ele me nt s. The a ut ho r s t ha nk t he A to mic Gro up of IA PCM fo r t hei r ato mic dat a a nd t he co wo r ker s i n High Co mp u2 t atio n Ce nt er of IA PCM fo r t he co nve nie nce t hey p ro vided . Ref erences : ( ) [ 1 ] Ro sen M D , Hagel st ei n P L , Mat t hew s D L . Explo di ng foil t echnique fo r achievi ng a sof t X2ray la ser [ J ] . Ph y s Rev L et t , 1985 , 54 2 : 106 —109 . ( ) Zha ng J , Mac Phee A G , Nil sen J , et al . De mo n st ratio n of sat uratio n i n a Ni2li ke Ag X2ray la ser at 14 n m[J ] . Ph y s Rev L et t , 1997 , 78 20: [ 2 ] 3856 —3859 . Zha ng J , Mac Phee A G , Li n J , et al . A sat urat ed X2ray la ser bea m at 7 na no met er s[J ] . S cience , 1997 , 276 :1097 —1100 . [ 3 ] ( ) Smit h R , Tallent s G J , Zha ng J , et al . Sat uratio n be havio r of t wo X2ray la si ng t ra nsitio n s i n Ni2li ke Dy [J ] . P h y Rev A , 1999 , 59 1:47 — [ 4 ] 50 . Dunn J , Li Y , O st er hel d A L , et al . Gai n sat uratio n regi me fo r la ser2driven t a bletop , t ran sient Ni2li ke Io n X2ray la ser s[J ] . Ph y s Rev L et t , [ 5 ] ( ) 2000 , 84 21:4834 —4837 . Dunn J , O st er hel d A L , Nil sen J , et al . Sat urat ed o utp ut t a bletop X2ray la ser s[J ] . J P h ys I V France , 2001 , 11 :2 —10 . [ 6 ] Ki ng R E , Per t G J , Mccabe S P , et al . Sat urat ed X2ray la ser s at 19 . 0 nm a nd 7 . 3 n m p u mp ed by a pico seco nd t raveli ng2wave excit atio n [J ] . [ 7 ] ( ) P h y s Rev A , 2001 , 64 5:053810 . Af a na siev Y V , Shl yap t sev V N . Fo r matio n of a pop ulatio n i nver sio n i n Ne2li ke io n s i n st eady2st at e a nd t ra nsient pla sma s[J ] . S ov J Q u ant [ 8 ] 强 激 光 与 粒 子 束 1348 第 17 卷 Elect ron , 1989 , 19 : 1606 —1612 . [ 9 ] Heal y S B , J anulewicz K A , Plo we s J A , et al . Tran sient high gai ns at 196 ! p ro duced by pico seco nd p ul se heati ng of a p refo r med ger ma ni2 ( ) u m pla sma [J ] . O p t Com m u n , 1996 , 132 5: 442 —448 . [ 10 ] Nickle s P V , Shl yap t sev V N , Kalachni ko v M P , et al . Sho rt p ul se X2ray la ser at 32 . 6 n m ba sed o n t ra n sient gai n i n Ne2li ke tit a ni u m[J ] . ( ) P h y s Rev L et t , 1997 , 78 14:2748 —2751 . Dunn J , O st er hel d A L , Shep her d R , et al . De mo n st ratio n of X2ray a mplificatio n i n t ran sient gai n nickel2li ke p alladi um sche me [ J ] . P h y s [ 11 ] ( ) Rev L et t , 1998 , 80 13:2825 —2828 . ( ) Nil sen J , Li Y , Dunn J . Mo deli ng pico seco nd2la ser2driven neo n2li ke tit a ni u m X2ray la ser exp eri ment s[J ] . J O p t S oc A m B , 2000 , 17 6: [ 12 ] 1084 —1092 . ( ) Kuba J , Kli snick A , David R , et al . Two2colo r t ra n sient p u mpi ng i n Ni2li ke sil ver at 13 . 9 a nd 16 . 1 n m [ J ] . P h y s Rev A , 2000 , 62 4: [ 13 ] 043808 . Qiao X M , Zha ng G P , Zha ng T X. Si mulatio n of Ne2li ke Ge 19 . 6n m X2ray la ser driven by pico seco nd la ser p ul se [J ] . H i g h Pow e r L ase r [ 14 ] ( ) an d Pa rt icl e B ea ms , 2005 , 17 1:71 —75 . Zha ng G P , Zha ng T X , Zheng W D. Te st of si mulatio n by exp eri ment s of Ne2li ke Ge X2ray la ser s [ J ] . H i g h Pow e r L ase r an d Pa rt icle [ 15 ] ( ) B ea ms , 2004 , 16 1:35 —39 . Zha ng G P , Zha ng T X , Zheng W D. Theo retical de signs of Ne2li ke Ge XRL so urce [J ] . H i g h Pow e r L ase r an d Pa rt i cle B ea ms , 2004 , 16 ( ) 2:171 —176 . [ 16 ] Qiao X M , Zhang G P , Zha ng T X. Mo deli ng pico seco nd2la ser2driven neo n2li ke ger mani um 19 . 6 n m X2ray la ser exp eri ment s[ A ] . The 9t h [ 17 ] Int er n Co nf o n X2Ray la ser [ C ] . Beiji ng , 2004 . ( ) Li nfo r d G J , Pere ssi ni E R , Soo dy W R , et al . Ver y lo ng la ser s[J ] . A p p l O p t , 1974 , 13 2:379 —390 . [ 18 ] ωω21激光驱动的类氖锗19 . 6 n m X 光激光 1 2 2乔秀梅, 张国平, 张覃鑫 ( )1 . 中国 工程 路基工程安全技术交底工程项目施工成本控制工程量增项单年度零星工程技术标正投影法基本原理 物理研究院 研究生部 , 北京 100088 ; 2 . 北京应用物理与计算 数学 数学高考答题卡模板高考数学答题卡模板三年级数学混合运算测试卷数学作业设计案例新人教版八年级上数学教学计划 研究所 , 北京 100088 摘 要 : 类氖离子的 X 光激光理论研究可以为类镍 X 光激光提供有益启示 。 设计 领导形象设计圆作业设计ao工艺污水处理厂设计附属工程施工组织设计清扫机器人结构设计 了一系列瞬态电 子碰撞激发类氖锗 ωω191 6 nm X 光激光的实验 ,采用 21泵浦方式 ,即预脉冲采用倍频钕玻璃激光 ,主脉冲采用基频 ,用新开发的瞬态电子碰撞激发 ωωωω类氖锗的系列程序进行了模拟 ,并与 11驱动的情况进行了比较 。模拟表明 ,21泵浦方案使类氖锗 19 . 6 nm X 光激光的小 ωω 信号增益系数增大为 11方案的 1 . 6 倍 ,增益区也转移到了更高的电子密度区 ,是获得更短波长 X 光激光的一种有效方法 。 ωω 关键词 : 瞬态电子碰撞激发 ; X 光激光 ; 类氖锗 ; 21泵浦方案