EPICS on TPS RF SystemYu-Hang Lin

Radio Frequency GroupNSRRC

Outline

History & Current Status

TPS RF System

TPS RF Transmitter Control Structure

TPS RF Test Area & Archive

Telephone Alarm System

Summary

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

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)

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.

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.

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.

Storage area: before and after module assembly.

Coupler installationSmall portable clean booth

End group assemblyComponent cleaning, assembly, one-month-

baking, storage.

Horizontal tests1. 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

Horizontal Test at SRF Lab

SRF Module in RF Lab

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

Archive System in RF Lab

Cornell super-conducting cavity (S0) cool down / warm up procedure in last 3 months.

Cavity top temperature / bottom temperature

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.

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.