Overview of DIAMOND to the

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Overview of DIAMOND to the European EPICS Meeting
at PSI May 2001
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Content

• Update on the DIAMOND project
• Overview of the DIAMOND Facility
• Control System
• Progress
• Requirements
• Technical Issues
• Conclusion

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What is DIAMOND ?

• DIAMOND is the new UK Synchrotron Radiation
  Source
• To be Located at the Rutherford Appleton
  Laboratory (RAL) Oxfordshire
• Medium energy source
• Complement ESRF
• Due online around 2007

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DIAMOND Photon Output
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Project Evolution

• 1996 Feasibility study produced (Red Book)
• 3 GeV 16 cells 345m 14 nm.rads
• 1998 Funding announced
• UK Government and Wellcome Trust
• 1999 French government joined Project
• 3 GeV 20 cells 400m very low emittance
• 2000 Site decision for RAL Oxfordshire
• 3 GeV 24 cells 560m emittance lt 3nm.rad
• 7 Beamlines on Day 1
• Budget set at 200M
• Science and Technical Advisor Committees
  established (SAC TAC)
• DIAMOND to be owned by Joint Venture Institute
  /Company

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Project Organisation - Model
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Programme Plan

• Prepare specification June 00 to Mar 01
• Start formal design phase Nov 2000
• Start procurement April 2002
• Final installation April 2006
• Commission beamlines April to Sept 2006
• Note Seven Day 1 beamlines

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Major Parameters

• Energy 3 GeV
• Beam current 300 mA
• Lattice DBA 24cells
• Symmetry 6 fold
• Circumference 560 m
• Max length for ID's 18 x 5m
• 6 x 8m
• Injection energy 3 GeV
• Life Time 10 Hours

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Artists Impression
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Possible Site Layout at RAL
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Technical Challenges

• Super Conducting RF
• Endorsed by TAC
• Issues of cavity phase stability
• Cryogenics refrigeration plant 1kW at 4.2K
• Top Up Injection
• Recommend by TAC, but not for day 1
• Booster Stability gtgt Power supply and control
• Injection into specific bunches gtgt Timing System
• Radiation Monitoring gtgt Integrated Loss
• Orbit Stability
• Sub Micron Feed Back

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Control System Progress

• 1999 Evaluated options for a control system
  tool kit
• TANGO, Commercial, SRS control system and EPICS
• 1999 EPICS chosen as control system tool kit
• 2000 July Budget costing prepared and work
  package planned
• 2000 Nov Start of Design Phase
• 2000 Nov Two staff on EPICS training at LANL
• 2001 Mar Test stand constructed and operational
  Base 3.13
• 2001 April Defined Scope and Requirements of
  Control system
• 2001 May Recruitment and training new staff
• 2001 June 5 Staff on control system
• 2001 July Evaluation of interfaces preparation
  of specifications and design
  report

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Control System Scope

• The DIAMOND control system will be a site wide
  monitoring and control system for the
  accelerators, beamlines and conventional
  facilities. The control system will extend from
  the interface of the equipment being controlled
  through to the operator. It will include all
  hardware and software between these bounds
  computer systems, networking, hardware interfaces
  and programmable logic controllers.
• The control system will not include any control
  or data acquisition for the experimental
  stations. It further will not include the
  personnel protection system, which is a separate
  system that will be monitored by the control
  system.

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Control Systems Includes

• Consoles
• Networking
• Equipment Interface
• Protection and Interlocking
• Timing and Event generation and distribution
• Wideband (RF) and Analogue Mux systems

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Initial Assessment of Equipment
Steering Windings
Vac for SR and 24 Front Ends
Transverse FB, Timing , Mux and Conventional
services
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Initial Assessment of IOCs
LL RF, Cavites, Amplifiers, PSUs
and Cryo plant Linac, Booster and
Tx Paths
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Summary of Interface Requirements

• Total Devices to Control 3781
• Total Number of IOCs 176
• Devices per IOCs approx. 22
• Likely number of PVs 100,000 ????

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Number of Interfaces

• From the Assessment of Equipment the number of
  particular interfaces is derived
• Analogue 1677
• Digital 1111
• VME back plane 73
• Video 8
• GPIB 2
• Serial 2116
• System Integration 8
• This is NOT necessarily channels but interfaces

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EPICS Test Stand

• IOC MVME167
• Sun Ultra 10 Solaris
• EPICS Base 3.13
• Tornado II
• CapFast
• PC P3 800MHx Linux Red Hat 6.2
• Epics Extensions
• Base 3.14 Alpha 2

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Immediate Tasks

• Training of Staff on EPICS
• Understand IOC Databases !?!?!?!?
• Evaluate EPICS Device support
• DIO,AIO, Serial, GPIB, Ethernet
• Evaluate existing Driver support
• Produce list of supported instruments
• Identify areas where development is necessary

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Serial Interfaces

• Need to support Serial Interfaces to equipment
• Advantages are
• Increased functionality per connection
• Minimises calibration errors from Control System
  ADCs
• Widely accepted use of RS232,422 etc
• Integration of systems
• Faster commissioning
• Disadvantages are
• High processor load
• Development to support vendor protocols
• Also need hardwire analogue for fast logging and
  digital for Interlocks

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Equipment Protection Policy

• The Control System will manage protection of
  equipment where required.
• Give consistency of behaviour.
• Three levels of protection determined by
  assessment of damage/cost caused by failure
• High Integrity provided in hardware
• Routine Interlocking provided by PLCs
• Prudent Operational Limits provided by IOC DBs

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Relational Database

• DIAMOND Control System MUST have a relational
  database
• Contain as Minimum the IOC DBs, Device names, and
  ???
• Review other EPICS uses of RDB from June 2001
• BESSY II, SLS, SNS
• Define tools and processes for producing IOC DBs
  and importing / exporting data to and from RDB

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Applications Interface

• Need to integrate seamlessly other sources of
  information at the application level
• RDB, Acc model and ????
• CDev provides one solution
• Low overhead
• Allows retention of core Epics extensions medm
  etc
• Want support for Win API most likely through
  ActiveX

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Application Model
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Industrial Support

• Can we buy EPICS ready systems from industry?
• SLS Linac from Accel
• SLS RF from Thomcast
• Power supplies ???
• BPM diagnostics from Instrumentation
  Technologies
• Support for beam position feed back system
• EPICS support from Observatory Sciences Ltd in
  UK
• VME manufacturers already offer support in the
  form of EPICS drivers
• Hytec in the UK

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A Model For Procurement

• Contract out build, install and commission of
  large parts of the Control System, by defined
  packages of work
• Consoles and Servers
• Network
• Equipment Interface per technical area
• Magnet PSU, RF, Diagnostics, Vacuum, Linac, ..
• Provide integration at the IOC level
• CLRC then has responsibility for overall
  integration
• Effective way to manage risk in procuring the
  control system

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Partition Control System
Consoles Servers
Network
IOCs
Main PSUs
RF
Vac
Diag.
IDs
Conventional Facilities
Steering PSUs
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Conclusion

• EPICS is not as frightening as led to believe !!
• EPICS is a very good choice for an accelerator
  control system
• Lots of issues to resolve for DIAMOND control
  system
• We need to consult the EPICS community
• Confident EPICS will enable
• The Control System to be available from day one
  of accelerator operation
• The Control System to support commissioning and
  operation of the accelerators not hinder

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