Accelerator Directorate
Instrumentation &
Controls Division (ICD) at
SLAC
Debbie Rogind
SLAC ICD Software
Department
Accelerators that use EPICS
plus some Legacy Control
• LCLS-I
(has been our bread and butter)
– Improvements
– Operational Maintenance and Support
• LCLS-II (next construction project)
• FACET (combo of legacy / EPICS)
– Operational Maintenance and Support
– New EPICS diagnostics
• Accelerator Research Test Facilities
– FACET User Area (new user facility, summer 2011)
– NLCTA, XTA (commissioning 2012), ASTA GTF, A-line/ESA, …
• SPEAR3 (new for ICD; EPICS Controls)
EPICS Collaboration Meeting Spring 2012
Page 2
Linac Coherent Light Source at SLAC
X-ray FEL uses last 1-km of existing 3-km linac
Last 1/3 Linac (1 km)
(all EPICS)
e- Transfer Line (340 m)
Injector (35º)
at 2-km point
Undulator (130 m)
Electron Beam Dump
LCLS-I Commissioning Timeline
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•
•
•
•
•
•
•
•
•
•
Challenging combination of Legacy & EPICS
EPICS-based Injector & drive laser
2007
Legacy & EPICS Linac
2008
BPMs & Magnets in EPICS
2009-2010
HXRSS (Self-seeding, separate slide)
Winter 2012
Linac Upgrade to full EPICS (still using CAMAC) 2010- now
mTCA LLRF demo station testing
now
Fast Feedback fully commissioned
Summer 2012
Archiver
Fall 2012
mTCA stripline BPM testing
Fall 2012
XTCAV
2013
EPICS Collaboration Meeting Spring 2012
Page 4
Recent commissioning of HXRSS
Self Seeding idea from Geloni, Kocharyan, Saldin (DESY)
HXRSS Project - P. Emma
• Close to the beginning of the undulator segments select just one slice of
the spectrum and amplify just that in the remaining undulators
• Select a slice of spectrum with a diamond crystal monochromator, then
mix up the electron bunch again
• Amplify just the slice in the downstream undulator
• All the power is concentrated into one wavelength to produce an order
of magnitude higher brightness for experiments
MATLAB GUI
1 GW
~25 GW
New Gain Curve
The Strong Taper Self-Seeded Terawatt
FEL
• Because electrons lose more and more energy in the undulator
to the FEL beam the undulator strength has to be matched to
that energy loss profile with a taper
• Applying for funding to add more undulator sections to the end of
LCLS, but tune them with a strong taper
• Self-seeding + More undulator length + Taper = Terawatt
FEL power
• The XTCAV is an important diagnostic and the only device that
can confirm the temporal structure of the HXRSS pulse
• LCLS-II design will intentionally be longer to exploit Terawatt
beams from tapered undulators
Courtesy Patrick Krejcik
EPICS Collaboration Meeting Spring 2012
Page 6
LCLS 4-Layer Network Architecture
Public Network
Relational
Relational
Relational
Databases
Databases
Databases
Gateway
Servers
Servers
Servers
Servers
RF Synchronization
Intermediary Network
To Photon Network
Router
LCLS-I Network
Timing
Operator
Operator
Operator
Console
Console
Console
Servers
Servers
Servers
Timing Network
Application
Application
Application
Servers
Servers
Servers
Soft
IOCs
To LCLS-I
Channel Access Backbone
Crates
VME, mTCA ...
Embedded
Processors ...
Mitigation
devices
Input
devices
MPS Network
Feedback Network
EPICS Collaboration Meeting Spring 2012
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Safety
Safety
Safety
Systems
Systems
Systems
StatusInfo
Info
Status
Status
Info
Link
Link
Link
Node
Node
Node
P
L
C
Link
Node
EVR
IOC
modules
modules
modules
device
device
device
EVR
EVR
EVR
IOC
IOC
IOC
modules
modules
modules
device
device
device
EVR
EVR
EVR
IOC
IOC
IOC
Feedback
Processor
Process
Control
MPS
501 total IOCs :
172 VME
222 Embedded
107 Soft
1.3 Million PVs
138,000 Archived
17,523+ alarms
LCLS-II
RF
gun-2
RF
gun-1
LCLS-II
LCLS-I
existing
L0
L0
X
L1
X
BC1 L2 BC2
L3
L1
BC1
L2
BC2
L3
LCLS-I
3-15 GeV
one more
km of linac
1-km bypass
line
•
•
•
•
•
und-hall-1
4-14 GeV bypass line
Use same LCLS-I injector design at sector-10 (1 km upstream)
Two new bunch compressors and 4-14 GeV linac (~1 km)
1200-m long bypass goes around LCLS-I
Two new undulators (HXR & SXR) in new tunnel
Baseline is 60 Hz in each undulator (multi-bunch later)
EPICS Collaboration Meeting Spring 2012
Page 9
HXR
SXR
und-hall-2
undulators
L  90 m
LCLS-II Summary Schedule
Rest of machine
Injector and
Global Systems
FDR
EPICS Collaboration Meeting Spring 2012
Page 10
FACET at SLAC
Facilities for ACcelerator Science and Experimental Test
Uses first 2-km of existing 3-km linac – Legacy Controls
Facilities for ACcelerator Science and
Experimental Test beams (FACET)
FACET
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FACET
User Area
sector 20
Uses first 2-km of existing 3-km linac
Plasma Wakefield Acceleration Experiments
THz Radiation
Ultra-Fast Magnetization
Plasma Focusing
Dielectric Wakefield Acceleration
First run summer 2011
Carsten Hast
EPICS Collaboration Meeting Spring 2012
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•
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53 total IOCs
19 VME
5 Embedded
29 Soft
Combo of SLC Legacy
controls and new EPICS
diagnostics
Maximize usage of existing
computing resources
Leverage LCLS-I controls
infrastructure, EPICS, apps
Mods required for apps to
become accelerator
agnostic
MATLAB Apps use AIDA to
bridge legacy and EPICS
SCP Legacy Control Panels
102,000 PVs
12,000 Archived
EPICS Collaboration Meeting Spring 2012
Page 13
EPICS / MATLAB
EPICS Spring 2012 Collaboraton, SLAC
Page 14
Accelerator Test Facilities
ESBNLCTA &
X-Band
Test Area
FACET
User
Area
ASTA
GTF
New Installations
ESA
•
•
•
Can support all of Accelerator
Test Facilities, now & future
Utilize SCCS AFS, NFS services
Limited access to DMZ
X-Band Test Area
EPICS Spring 2012 Collaboraton, SLAC
Page 17
SPEAR3
•
•
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photon beam line
bending
focusing
vacuum
chamber
rf-cavity
injection
system
Some SPEAR3 operations migrating to MCC
EPICS, linux workstation support moves to ICD
e
Standardize more EPICS infrastructure between LCLS and
SPEAR3 as migration from VMS occurs…
-
Insertion device
beam line
LCLS II
Programs
Engineering
Service
Centers
ICD
LCLS I
SPEAR3
Test
Facilities
EPICS Spring 2012 Collaboraton, SLAC
EPICS Collaboration
Meeting Spring 2012
Page 19
Page 19
FACET
Accl.
FACET
Engineering
Service
Center
Low Level SW,
IOC Apps
Host Level
SW, IOC Apps &
Data
Computing &
Networking
Infrastructure &
Legacy Support
(for FACET)
20
How to succeed as a Service Center?
• Try to make customers happy with limited resources
– Communication
– Process to track all problems, requests, reports
– Prioritize work
• Operations (LCLS-I, SPEAR3, FACET), LCLS II CD Prep, Test Facilities, AIPs,
Enhancements
• When all resources are allocated, ensure that no program has zero priority
• Try to follow Conduct of Engineering (CoE)
–
Codifying engineering policies and procedures. Setting guidelines for obtaining specifications,
budget and schedule requirements from customers
• Have a single Point of Contact (POC) for subsystems, projects
• Every engineer has to do % maintenance, be subsystems lead(s), and
backup others
• Commonality between accelerators
EPICS Spring 2012 Collaboraton, SLAC
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Conclusion
• EPICS is rapidly expanding at SLAC
• LCLS based applications and infrastructure have
been leveraged for use by other accelerators
• Slight modifications to existing LCLS code base
were required to become accelerator agnostic
• LCLS-II and beyond will provide rich opportunities
for advancing the state of controls and
instrumentation
• Trying to improve our Service Center model
– Communications, reporting, scheduling, efficiency
EPICS Collaboration Meeting Spring 2012
Page 22
The End
Thanks for Listening
EPICS Collaboration Meeting Spring 2012
Page 23