1. EPICS on TPS RF System Yu-Hang Lin Radio Frequency Group NSRRC

2. Outline  History & Current Status  TPS RF System  TPS RF Transmitter Control Structure  TPS RF Test Area & Archive  Telephone Alarm System  Summary

3. History & Current Status  Why EPICS? In 2007, director of RF group says “Instrument and control group decided to use EPICS. We also have to study EPICS.”  Team member for studying EPICS in RF group – one – me.  Currently we use EPICS for – Data archive Remotely system monitor Telephone alarm system

4. TPS RF System  300 kW transmitter by Thomson (turnkey system) (2 sets) + THALES Klystron (2 for operation, 2 for spare)  Home-made low level RF system (4 sets)  PETRA cavities (normal temperature) for booster routine operation  KEKB cavities (super-conducting) for storage ring routine operation  Home-made electronics control systems for super- conducting RF (3 sets)

5. TPS Transmitter  Transmitter  Power supply  Cooling system  Amplifiers  RF loads  Control system  Interlocks in control system  fast interlock by ICS (interlock control system)  slow interlock by Siemens PLC  All signals and status are monitored by EPICS IOC.

6. TPS Transmitter Control System  A Siemens S7-300 PLC control the startup and shutdown procedure of transmitter.  EPICS IOC (on CPCI single board computer with Linux operating system) communicates with PLC via TCP on Ethernet (PSI S7PLC driver).  EPICS IOC has no authority to write data to PLC but reading.  Two human-machine interface (HMI) touch panels are in charge of displaying and setting functions of PLC.  PLC communicates/controls ICS and PSMC via serial communication over Siemens protocol and ASCII protocol.

7. TPS Transmitter Control System  A Siemens S7-300 programmable logic controller (PLC) controls all the startup and shutdown procedures.  Two (local/remote) human-machine interfaces (HMI) are in charge of displaying and setting functions of PLC.  Only one – either the local HMI or the remote HMI – can perform the system operational functions at one time.  A hardware switch on the front panel switches the privilege of control between local and remote HMI.  EPICS interface layer communicates with PLC via TCP/IP for data collection only, i.e. EPICS has no authority to control the RF transmitter system.

8.  Storage area: before and after module assembly.  Coupler installation Small portable clean booth  End group assembly Component cleaning, assembly, one-month-baking, storage.  Horizontal tests 1.Cryogenic cooling power, test Dewar, bayonet joint. 2.RF source, radiation shielding, measurement instruments. 3.Pumps/gauges for cavity vacuum and insulation vacuum. 4.Data recording => EPICS Channel Archiver 8 SRF Module in RF Lab

9. 9 Horizontal Test at SRF Lab SRF Module in RF Lab

10. Archive System in RF Lab  Too many signals need to be monitored/recorded during the horizontal test Temperatures of cavity and cryogenic pipes Flow rates of cooling water and cryogenic system (Nitrogen and Helium) Opening scale of valves Pressures of SRF module Vacuum …  DTACQ ACQ196 provides a good solution to high density environment. (96 channels within a single board) Cornell super-conducting cavity (S0) cool down / warm up procedure in last 3 months. Cavity top temperature / bottom temperature

11. Archive System in RF Lab Cornell super-conducting cavity (S0) cool down / warm up procedure in last 3 months. Cavity top temperature / bottom temperature

12. Telephone Alarm System  Data collection server collects all monitored data from EPICS and other data archive servers via UDP or TCP protocols.  Alarm rules are stored in the data collection server.  Control PC periodically asks data collection server the alarm statuses.  Control PC equips a dialing device (AD120) which connect to telephone line.  Once a signal satisfies its alarm conditions, control PC will automatically contact persons with speeches to distinguish which sub-system fail.

13. Summary  Currently, EPICS is not used to control any device on RF system. Only data collection and distribution are allowed.  Ethernet-wide broadcasting makes EPICS being a good tool in data recording.  EPICS is a main data recording tool on RF system in test area, especially during the TPS RF transmitter acceptance test and KEKB superconducting horizontal tests.  EPICS IOC on embedded Linux for digital LLRF will be developed after TPS RF project.