1. Presented by Li Gang Accelerator Control Group
CEPC-Control
Presented by Li Gang
Accelerator Control Group
2018/5/17

2. Survey of Control Software Redundant technology
Overview
Survey of Control Software
Redundant technology
Post mortem technology based on event timing system
Prototype of MPS
2018/5/17

3. Overview: Challenges from CEPC
Super Large Scale: around 53.6 km in circumference V∙S LHC  27-kilometre ring
FECs and Devices: CEPC more V∙S LHC 2,000 FECs and 85,000 controlled devices 
High reliability && high availability
Overall faults analysis : Power supplies, cryogenics, injections, SRFs, vacuum ,etc=> protection strategies
2018/5/17

4. Overview: Requirement of control
Overall information;
Monitoring and recording;
Fault diagnostics;
Global && local controls;
Automatic process control, feedback;
Sequence control;
Prevention of dangerous action
Timing system
Machine protection

5. Overview: Performance of control
Reliability;
Flexibility, scalability and maintainability,;
Cost effective;
Fast development;
Ease of use (developers and users)
Documentation/support
2018/5/17

6. Overview: control subsystem
Center control system: data server, data archiver, etc
Control network
Timing system
Machine Protection System
Vacuum control system
Temperature Monitoring system。
Post Mortem
Power supply control system
Video Monitoring system
Others
2018/5/17

7. Survey of Control Software
PVSS: CERN, 50 years, Commercial product from ETM company, Austria
Some features
• Human-machine interface (process visualization)
• Devices described as data points (DP), device properties as data point elements (DPe)
• Control device access
• Alarm handling (display, filtering, etc.)
• Archiving and trending , etc
2018/5/17

8. Survey of Control Software
2018/5/17

9. Survey of Control Software
EPICS: 40years, more than 150 labs or companies,,
Some features
2018/5/17

10. How does EPICS do ? Process Variables: Power Supply
04/05/13
How does EPICS do ?
Channel Access Client
Channel Access Client
Channel Access Client
Channel Access Client
Channel Access Server
Process Variables:
Power Supply
Computer Interface
S1A:H1:CurrentAO
S1:P1:x
S1:P1:y
S1:G1:vacuum
Beam Position Monitor
Computer Interface
Vacuum Gauge
Computer Interface
Let’s take an example:
Suppose you had a particle accelerator to control. Among many other things, 10

11. EPICS Version 4
Production HLA Client
PVAccess/CAC
MMLT Client
Scripting HLA Client
Control System Studio
PVAccess / CAC
Completed
Early Development
Being Extended
PVAccess/CAC
PVAccess/CAC
Ethernet
PVAccess
PVAccess
PVAccess
PVAccess/CAC
PVAccess/CAC
PVAccess/CAC
Middle Layer Servers
Model Server
Lattice Server
Channel Finder Svr
Multi-Channel Arrays Svr
Save/Compare Restore Svr
Magnet Conv, Response Matrix, Dispersion, etc….
Elegant/Tracy
SQL
SQL
Serves orbit, magnets, any array of channels
SQL
RDB
IRMIS
IRMIS
Distributed Front-Ends
PVA
Diagnostics
CAS
Power Supplies
PVA
CAS
PVA RF
CAS
Vacuum
PVA
CAS
PVA
Utilities etc..,
CAS
Diag & PS
PVA
CAS
Physical Device
Physical Device
Physical Device
Physical Device
Physical Device
LS2 Simulation
Supporting the next generation of scientific control systems.

12. Survey of Control Software
TANGO: 15 institutes, European
TANGO Controls is a software toolkit :
for connecting things together +
building control systems +
integrating systems
The TANGO community meetings take place each year alternately in one of the 15 institutes members of the TANGO consortium. 
They group together all the members of the community with the developers. They present the last technical progress and agree on the development strategy and roadmap
2018/5/17

13. Survey of Control Software
2018/5/17

14. Survey of Control Software
DOOCS: DESY, German,  European XFEL Distributed Object Oriented Control System
2018/5/17

15. Other Possibilities…
2018/5/17

16. Redundant technology
A user facility with high demands for 99.8% efficiency
The control system may not fail
● Possible scenarios:
⇒Cold stand by ( switching ‚on demand‘; i.e. for maintenance)
⇒ Hot stand by ( seamless switch of IOC‘s)
Hardware maintenance
Software maintenance
Installing new system-/ application- Software
2018/5/17

17. Redundant technology
2018/5/17

18. Post mortem analysis based on event timing system
Timing and Synchronization are very IMPORTANT everywhere. Global system.
Possibility to integrate post mortem analysis into event timing system.
Software infrastructures including database are under evaluation

19. Post mortem analysis based on event timing system
Timing Master
timing
feedback
Timing Distribution
feedback
feedback
timing
feedback
timing
timing
Timing Receiver
Timing Receiver
Timing Receiver
timing
feedback
timing
feedback
timing
feedback
Data Acquisition
Data Acquisition
Data Acquisition

20. Prototype of MPS Fast-MPS: Prevention of dangerous action
Response time : < a few tens of microseconds 
High availability: redundant hardware
Predefined interfaces: relays, optical ports …

21. Prototype of MPS
redundant hardware
2018/5/17

22. Fast-MPS (Main Board) UART Opt. transceivers/ RocketI/Os/6
Gb net
Extended
IOs/64
Lamp
indicators/8
FPGA/XC6SLX
100T-3FGG900
CPU/
Loongson 2F
VME P1/P2
VME J1/J2 22 22

23. 经费预算 Prototype and development International academic exchange 0.75M
服务器4*3、前端设备23、仪器32（信号源、示波器）
电子学及配件8
International academic exchange
0.25M/5-6 persons（3Dr+4）
2018/5/17

24. 参加人员 2018/5/17 编号 姓名 性别 职称 学位 单位名称 电话 电子邮件 身份证号码 每年工作时间（月） 是否光源 1 雷革 女
研究员 博士
高能所 6 是 2
金大鹏 男  否 3 李刚 高工 硕士 否 4 赵卓 5
徐广磊  3  是 刘智 学生
博士在读 10 7
乔予思
2018/5/17

25. Thank colleagues from control group and others from accelerator center
Thank international control experts from other institutes
2018/5/17