EPICS on TPS RF System

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EPICS on TPS RF System
Yu-Hang LinRadio Frequency GroupNSRRC
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Outline

• History Current Status
• TPS RF System
• TPS RF Transmitter Control Structure
• TPS RF Test Area Archive
• Telephone Alarm System
• Summary

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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

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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)

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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.

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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.

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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.

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SRF Module in RF Lab

• 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
• Cryogenic cooling power, test Dewar, bayonet
  joint.
• RF source, radiation shielding, measurement
  instruments.
• Pumps/gauges for cavity vacuum and insulation
  vacuum.
• Data recording gt EPICS Channel Archiver

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

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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.