Proceedings of the 25th Linear Accelerator Meeting in Japan (July 12-14, 2000, Himeji, Japan)[12P-23]

RF CHARACTERISTICS OF 324MHZ 10KW RF PULSE AMPLIFIERSeiya Yamaguchi*), Takao Kato and Syuichi Ishiguroa)
High Energy Accelerator Research Organization (KEK)
1-1 Oho, Tsukuba, Ibaragi, 305-0801 JAPANa) NEC Corporation
1-10 Nisshincyo, Fuchu, Tokyo 183-8501 JAPANAbstract
As a power source for buncher cavity of high intensity proton linac, a 10kW transistor pulse amplifier was manufacturedand tested. Rf characteristics such as frequency response, phase flatness in a pulse and long-term stability of amplitude andphase were m easured. Ri se and fall t ime of the pul se was al so m eas ured for puls e structure of chopper cavi ty.

324MHz 10kW

 !"#$%&'()*+,- ./012()*3456789:;<=>?@AB>
C#D✤FG$%&'()*HIJKL"#'
MN()* ✦P❆✽ STUVWX .YZ[\]^_`abcd eafghi✜✱✻m✢oJpdq^_ ✥ sdthu^_ ✥ s-LvBwBxB ✱✻m yz{|}~  ✦✴❆✽ ayz@dth `STJ
CAB#D✥✦FGBA^_X"> ✦✥✧P✵ .YZ^_W 87Xpdq ✤✣✾ dthu- ✥✣✾ W#Gpdq
dthu.YZ*JB#
 W$#Xu1H-W dthu C✜✤✣¡¢ £¤✢H-¥#¦JX§+,-¨W#G©ª&pdq^_ ✤✣✾ .YZu1*«¬=- wWXdthu*@CH- ­®J ¯°±# !²°=G
20ms

buncher pulse

600 µs222ns

chopper pulse

500ns³ ✤´dthuµ¶·pdqu1
´´´u14¸G*) S. Yamaguchi, 0298-64-5693,
Seiya.Yamaguchi@kek.jp

6¹WXdthupdq ✥ º»u14¸✜³ ✤ ¼½✢J¾"#u1*.YZ ¿ÀÁÂJ°C>ÃÄ"#G

6*XcUÅÆ7* ✤✣ sÇÈ:=W É! XÊ ✤ JË"ÌW#GÍÎÏÐ³ ✥ JË"GÊ ✤´✤✣✾ .YZu1*É!ÑÒG
ÓÔðñòó ✯ õöX ✮✯ õ*YZÕ✦✥✧ø✣ùúP✵
Ö77✤✣✾✜×i✢
Ö7V×Ø ú✣ûy7u14¸dt h u   ü u 1  ✥✥✥¡¢ ýþ ✥✪✫¡¢ ✩✣✣µ¢ pdqüu1 ✩✣✣µ¢u 1   H -  Ù¤-Úo✥✣¡¢ £¤u1ÛKÜÝÞ&ù✤øú£¤u1ßà=✤ú✣✵ ãpácÙgØácùú✙£¤u1â7µ¶·KÜãä´´´´7ù✤øú✙£¤´´´´KÜù✤øú£¤.åZ✜✥ æ✢✩✣❅✯Ö7çè✾✿✪✪✱Ö7éfÆÁ:& ú✣❅✯´´´´êëìí&✥✪ù✥îïÓÔ%^îÔ

−195−

75
OUTvsIN

Output power [dBm]

70
65
60
5550

Buncher pulse
45

Chopper pulse

40-5

0

5101520

Input power [dBm]³ ✧´.YZ7yÖ7

³ ✥´✤✣✾✦✥✧P✵ .YZu1*ÏÐGGu1 pdqu1J ✦✥✧ù úP✵
()Wù✤❅✯ £¤()Jµö*>C#G72

dthu pdq .Y ZXu1
4¸-#Wµ¶·¿ÀX³ ✦ JË"¶JCG

Output power [dBm]71.5

power meter-50.095dB

APM-50.126dB

10kW

70.570Chopper pulse
69.510dB

SGpulse modulator

Buncher pulse
71

OUTvsfrequency

69319 320 321 322 323 324 325 326 327 328 329

324MHzCW
3dBm

Frequency [MHz]³ ú´Ö77YZÕ+,oscilloscopeG(a)power meter-50.095dB-50.126dB

10kW

SG6dB

DEMOD
PC(b)
³ ✦´✤✣✾ .YZ*µ¶·¿ÀG´´´✜❂✢dthu ✜❃✢pdqG✜❂✢WXC ✜❃✢WX ✶✸ éÅÆCX ✜❃✢X ✮✱✰ Æ¯JÚovv#Wu1 CH-¿À-WCvAW ✜❂✢XCu1✜✩✣✣µ¢✢WXKÜu1ÛÝÞ&-ù✤✣J=M!"vA#B>=ö@W#G.YZ7yÖ7 ³ ✧ JË"Gdthu
u1pdqu1J¾=>¿À=
- $%& ✤✤❅✯' y7W ✪✣❅✯'✜✤✣✾✢
Ö7-¥AB>C#GÖ77YZÕ³ ú JË"Gdthu

1.5

1.5
IN pulse

10ns

10ns
1

1

Amplitude [a.u.]

IQ
Waveform analyzer

0.50-0.5(a)0.5

0-0.5(c)-1-1IN pulse-1.5-50-40-30-20-10010203040-1.5200

50210 220

230

Time [ns]rise/fall̲OUT

210-1-2120

250

260

270 280290300rise/fall̲OUT

20ns

2240

Time [ns]Amplitude [a.u.]

6dB

Amplitude [a.u.]

324MHz600µs,50Hz
20dBm

y7u1µ¶·Ö7u1H-¤ ³ ✩ JË"Gy7u1XH--¤-J& ✤✣¡¢ W#- Ö7u1wBA
XH-- ✥✣¡¢ -¤-- ✦✣¡¢ W*G

Amplitude [a.u.]

A30ns

10-1(d)(b)-2
130 140

150

160

170

180

Time [ns]190 200

210

220

350

360

370

380

390

400

410

420

430

440

450

Time [ns]³ ✩´u1H-¤- G✜❂✢y7
H- ✜❃✢Ö7H- ✜❄✢y7¤-✜❅✢Ö7¤-G´´

9delta phi vs power

8u1ÛKÜ¿ÀX ✦ø✤ W0¶Jdthuu1J°C>XW pdq
u1J°C>X ✶Ù✸ éÅÆW¿À=G¿ÀÁÂ³ ✪ JË"Gdthuu1J¾=>X Ö77 ✤✣✾ öWH--¤-Õ✤✣¡¢ 1C>ù✤øú£¤W#- pdqu1J¾=>XÖ77-2#J°B>KÜÝÞ&X3ó=>4 ✤✣✾ WXù✫J=>C#G³ ✫ XÖ77u1ÛKÜÝÞ&56Ë=W#GÖ77- ú✾ £HJ#
78JKÜÝÞ&-3#Wb9`phi :-¨W#G

Phase flatness [deg]pá cµ¶·gØ ácX³ ✩vA/v#¶Jùú✙£¤Jµö*>C#G765432101234567891011³ ✫´Ö77u1ÛKÜÝÞ&5 6✜p dqu1✢G

1.87

amplitude

1.86

10Amplitude [a.u.]Phase [deg]1.83

311863018529184
183

1.82

phase

1.81

2827182

26181

25180
1224

Temperature [°C ]1kW
5kW
10kW-20

temperature

1.84

187

Phase [deg]1.85-10-30
1.80
0-40

1234567891011

Time [hour]out̲01̲05̲10-50-200-100

0100200300

Time [ns](a)³ ✬´ KÜÚoãäGí&   KÜãäX wBxBù✣øú ù✣øú✙ ù✣ø✩W *G KÜJb9`phi:J¶#ãäAB-¨W#G110

Phase [deg]100pdq^_ ✦✥✧P✵✤✣✾ .YZu1*«¬= .YZ ¿À=Gö dthu*=> CD*GÊ✤ JEFÑÒXG=>C#- pdqu1JC=>Xu1Ûµ¶·u1oKÜb9`phi-¨W# dthuu1J¾=>X H--¤-Úo®
H I✜✥✣¡¢✢ J K£ ¤J "# ¨ - #ËBG

P out=3.6kW

90

P out=7.8kW

80

70

P out=10kWa6̲8̲1160
0100

200

300

400

500

600700Time [µs ](b)³ ✪´u1ÛKÜÝÞ&G✜❂✢dthuu1✜❃✢pdqu1G´´Ö77µ¶·KÜÚo✜✤✥ Úo✢ãä¿À=✜pdqu1J¾=>þ u1 ✩✣✣µ¢ ßà= ✤✣✵✢G¿ÀÁÂ³ ✬ JË"Gí&X<òÛ=u>g ?J@L= ÆJ¶éfÆ=G

20

012Output power [kW]

¼LMND✤F✔ ✔ “$%&'()*;<” P✲P✔✹❆❋T❍❏✔✬✬ú✔ ✔ ✔ ✔ ✔ W✮✲✹✶✻❆❄❉✔✥✣✣✣✣✣✦ W✵✳✬✬✧GD✥F✔ ✔ ✻ø✔P❂❏T✔ ❂¡❅✔ ✺ø✔ ✳❑✔ “P✲✯✻✔ ✱❆¢❊❈¡✔ ❇T❍✔ ❏❉❆✔ W✵✳
✥✣✣P❆✽✔✷❍T❏T¡✔m❊¡❂❄”✔✷❍T❄ø✔✤✬❏❉✔✶¡❏’`✔m❊¡❂❄✔✰T¡❇ø✰❉❊❄❂❈T✔✮❑❈❑¢❏✔✥✦✥✫✔✤✬✬✫✔❋❋ø✪✣✪✥øD✦F✔ ✔ ✺ø✔✳❑✔❂¡❅✔✻ø✔P❂❏T✔a❑❄`ø✔✶¡¢❏❍ø✔P❆❏❉ø✔✮✧✧✣✔✜✥✣✣✣✢❋❋ø✥✬✩✦✣✩ø