development of compact klystron drive system and … · development of compact klystron drive...
TRANSCRIPT
DEVELOPMENT OF COMPACT KLYSTRON DRIVE SYSTEM AND RF MONITOR
Yoshiharu Yano#, Mitsuhiro Yoshida, Hiroaki Katagiri, Takako Miura, Shinichiro Michizono, Shigeki Fukuda
High Energy Accelerator Research Organization
1-1 Oho, Tsukuba, Ibaraki 305-0801 Japan
Abstract Sixty high-power klystrons of KEK Linac are driven by eight sub-booster klystrons or eight semiconductor amplifiers. Current klystron drive system consists of a phase shifter, an attenuator and an RF-switch. Since the system becomes old and does not satisfy the requirements of super KEKB, we develop a new drive system with high precision using IQ modulator. We also develop a new RF monitor system using IQ demodulators, which will be replaced from the current VME-rf monitors. Both drive and rf monitor systems will be operated by EPICS.
RF
1.
8 A,B,C,1,2,3,4,51 4~8
A-1,B-5,B-6,2-1, 3T,5-1,5-2
[1]
I/Q FPGAI/Q RF
VSWR RF HP-UNIX
VXI [2]
LINAC
RF 4ch RF
FPGA EPICS IOC
2.
2.1
(Klystron Drive System) I AAM PM NIM
PLC1W
____________________________________________ # [email protected]
Proceedings of the 8th Annual Meeting of Particle Accelerator Society of Japan (August 1-3, 2011, Tsukuba, Japan)
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8
600W [3] 2014 Super-KEKB
PF-RING
PLC
2.2 IQ
IQ IQ
1
1: IQ (2856MHz)
RF 2856MHz / 0dBm
IQ +/-1V max. 50
2856MHz / +1.5dBm
+/-0.5
+/-0.2dB
+/-0.2dB
+/-0.5
35nsec
2 IQ (2856MHz)
2: IQ (2856MHz)
2.3
2856MHz RF- , RF-Monitor, VSWR, Interlock SB 2856MHz RF- , RF-Monitor 1298MHz RF- , RF-Monitor, VSWR, Interlock 5712MHz
RF- , RF-Monitor, VSWR, Interlock VSWR
3
0.1 ( ) 1 ( ) I A PM IQ AM Pin VSWR FB IQ
FPGA (Xilinx ML-605)
3:
4
4:
5
5:
Proceedings of the 8th Annual Meeting of Particle Accelerator Society of Japan (August 1-3, 2011, Tsukuba, Japan)
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6 7
6:
7:
6 4 sec 3 sec400nsec
1/2 RF 0
7 FPGA
2.4
(NA)
8
IQ400 160,000
IF=100Hz40
NA
4002
8:
9
9: IQ Test Module VSWR Test Module
10
10 :
Proceedings of the 8th Annual Meeting of Particle Accelerator Society of Japan (August 1-3, 2011, Tsukuba, Japan)
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3. RF
3.
50Hz
PF, KEKB_e-, KEKB_e+, (PF_AR) ACC/STB 1 4ch
KLY_Pf, KLY_Pr, SLED_Pf, ACC_Out RF
AD/DAAD DA
12ch 8chAD 4ch DA 4ch RF
4ch 2chIQ
AD/DA FPGA
3.2 IQ
2
2: IQ (2856MHz)
RF 2856MHz / +10dBm
IQ +/-1V max. 50
2856MHz / +1.5dBm
+/-0.5
+/-0.1dB
2%
+/-0.5
35nsec
3.3 RF
S, L, C
2856MHz RF 1298MHz RF 5712MHz RF
RF RF 4ch IQ 4
0.1 ( ) 1 ( ) 50Hz
FPGA 4ch 2ch
11 RF
11: RF
3.4 RF
RF
RF
4. EPICS IOC ML-605 EPICS IOC
EPICS IOCPC 1 PCEPICS IOC PC
ML-605 SiTCP[4]
RF 1 PC8
5. IQ IQ FPGA ML-605
RF
SBRF
ML-605 20
[1] Design Report on PF Injector Linac Upgrade for KEKB,
KEK Report 95-18,1996 [2] H.Katagiri, et al.,”Microwave Monitor System For The
KEKB Injector Lianc”, Proceeding of the Asian Particle Accelerator Conference “APAC98”. KEK, Tsukuba, Japan, 1998
[3] Y. Yano, et al., Proceedings 3th Annual Meeting of Particle Accelerator Society of Japan, Sendai, August 2-4, 2006
[4] http://e-sys.kek.jp/tech/sitcp/
Proceedings of the 8th Annual Meeting of Particle Accelerator Society of Japan (August 1-3, 2011, Tsukuba, Japan)
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