1. LLRF development of SSRF RF Group and Linac Group 2015-11-3

2. content SSRF RF system of Storage RF system of Booster RF system of Linac LLRF development of booster and storage Linac LLRF SXFEL S-band LLRF C-band LLRF summary

3. Layout of SSRF

4. SSRF Status

5. SSRF RF system of Storage

6. SSRF RF system of Booster 5-cell normal cavity （ A ） Two 5-cell normal cavity （ B ） one 180kW klystron （ C ） LLRF （ D ） Interlock and monitor

7. The first generation LLRF controller  RF down-up converter based on Coaxial element  IF signal is generated through DDS  Clock board  DSP development board  Develop field loop, and tuning loop  LabView interface LLRF interface DSP board

8. The second generation LLRF controller  Six channels ADC 125MSPS  Two channels DAC 275MSPS  Altera ep2s60 FPGA  Ethernet communication port  EPICS interface  Amplitude stability and phase stability achieved better than 0.025% (RMS) and 0.014°(RMS) without klystron or cavity, respectively.  Used at RF cavity of storage ring and booster LLRF controller RF front-end DSP board Amplitude and phase stability LLRF Interface

9. The third generation LLRF controller Board with CPCI package ， 4 Channel ADC.125MSPS 2 Channel DAC ， 275MSPS 4 down-converter and one up-converter channel Linear is better than 60dB, isolate is better than 70dB CPCI communication. EPICS interface Front-end board DSP board Controller Box ADC: 32k Point FFT, Fin = 20MHz, 80MSPS

10. the first generation LLRF used in the storage ring RF （ 500MHz ） system signal architecture Stability 200mA@3.5GeV

11. The second generation LLRF used in the storage ring The second generation replaced the first one used in RF station one of Storage ring in 2014.5 The second generation replaced the LLRF from ACCEL in Booster RF system in 2014.8

12. The third generation LLRF used in the storage ring The third generation replaced the first one used in RF station II and III of Storage ring in 2015.2

13. Linac layout of SSRF

14. Linac LLRF of SSRF

15. LLRF of SXFEL Linac Group

16. LLRF RF System of SXFEL Klystron S-Band SSA Deflector SLED 4 Sets of S-Band (2856MHz) 4 Sets of C-Band (5712MHz)

17. LLRF of S-Band 2856MHz 5712MHz LLRF of C-Band SXFEL Pulse mode and 3us width ; SXFEL repeated 10Hz. Based on Micro-TCA More information contact with zhangjunqiang@sinap.ac.cn Signal Source Trigger LO & CLK MTCA Chassis Solid State Amplifier MTCA under test LLRF architecture of SXFEL

18. summary First generation ： Development from 2005, corporation with LBL ， It was used in the normal cavity at 2007.12. After 2008.8, it was used in the superconductivity cavity Second generation ： Development fro m 2010 ， tested in 2013 on line ， used in RF station I of storage ring in 2014.5, replace the llrf from the ACCEL in 2014.8 Third generation ： Development from 2014. used in RF station II and III of storage ring in 2015.2. The Linac LLRF is base on PXI commercial DSP board and coaxial element The LLRF of SXFEL is under development

19. Thanks