Instrumentation &

Controls Division (ICD) at

SLAC

Debbie Rogind

SLAC ICD Software

Department

Accelerator Directorate

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

X-ray FEL uses last 1-km of existing 3-km linac

Injector (35º)

at 2-km point

Last 1/3 Linac (1 km)

(all EPICS)

e- Transfer Line (340 m)

Undulator (130 m)

Electron Beam Dump

Linac Coherent Light Source at SLAC

LCLS-I Commissioning Timeline

• 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

• 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

1 GW ~25 GW

HXRSS Project - P. Emma Self Seeding idea from Geloni, Kocharyan, Saldin (DESY)

MATLAB GUI

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

Safety

Systems

Status Info

Safety

Systems

Status Info

Application

ServersApplication

Servers

Relational

DatabasesRelational

Databases

Operator

Console

Servers

Operator

Console

Servers

ServersServers

Lin

k

No

de

Lin

k

No

de

EV

Rd

evic

em

od

ule

s

IOC

EV

Rd

evic

em

od

ule

s

IOC

EV

Rd

evic

em

od

ule

s

IOC

EV

Rd

evic

em

od

ule

s

IOC

IOC

EV

RL

ink

No

de

Lin

k

No

de

Crates

VME, mTCA ...

Embedded

Processors ... MPS

Feedback

Processor

Timing

Channel Access Backbone

Mitigation

devices

MPS Network

Feedback Network

Timing Network

Operator

Console

Servers

Application

Servers

Soft

IOCs

Router

Relational

DatabasesServers

Intermediary Network

Public Network

To Photon Network

Gateway

Servers

RF Synchronization

EV

Rd

evic

em

od

ule

s

IOC

EV

Rd

evic

em

od

ule

s

IOC Input

devices

To LCLS-I

LCLS-I Network

P

L

C

Process

Control

Safety

Systems

Status Info

EPICS Collaboration Meeting Spring 2012

Page 7

501 total IOCs :

172 VME

222 Embedded

107 Soft

1.3 Million PVs

138,000 Archived

17,523+ alarms

LCLS-II

• 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)

LCLS-I X

L1 L2 L3 BC1 BC2

RF gun-1

L0

3-15 GeV

existing und-hall-1

LCLS-I

L3

RF gun-2

L1 L2 BC1 BC2

L0

one more km of linac

HXR 4-14 GeV bypass line

SXR

und-hall-2

X

LCLS-II

1-km bypass line

undulators L 90 m

EPICS Collaboration Meeting Spring 2012

Page 9

LCLS-II Summary Schedule

Injector and

Global Systems

Rest of machine

FDR

EPICS Collaboration Meeting Spring 2012

Page 10

Facilities for ACcelerator Science and Experimental Test Uses first 2-km of existing 3-km linac – Legacy Controls

FACET at SLAC

Carsten Hast

Facilities for ACcelerator Science and

Experimental Test beams (FACET)

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

FACET

EPICS Collaboration Meeting Spring 2012

Page 12

53 total IOCs

19 VME

5 Embedded

29 Soft

102,000 PVs

12,000 Archived

• 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

EPICS Collaboration Meeting Spring 2012

Page 13

EPICS / MATLAB

EPICS Spring 2012 Collaboraton, SLAC

Page 14

ESA

ESB- NLCTA &

X-Band

Test Area

FACET User

Area

ASTA

GTF

Accelerator Test Facilities

New Installations

• Can support all of Accelerator

Test Facilities, now & future

• Utilize SCCS AFS, NFS services

• Limited access to DMZ

EPICS Spring 2012 Collaboraton, SLAC

Page 17

X-Band Test Area

SPEAR3

• Some SPEAR3 operations migrating to MCC

• EPICS, linux workstation support moves to ICD

• Standardize more EPICS infrastructure between LCLS and

SPEAR3 as migration from VMS occurs…

focusing

bending

vacuum

chamber

Insertion device

beam line

injection

system

rf-cavity

photon beam line

e-

EPICS Spring 2012 Collaboraton, SLAC

Page 19

Engineering

Service

Centers

Programs

ICD LCLS I SPEAR3

Test

Facilities

LCLS II

FACET

Accl.

FACET

EPICS Collaboration Meeting Spring 2012

Page 19

20

Low Level SW,

IOC Apps

Host Level

SW, IOC Apps &

Data

Computing &

Networking

Infrastructure &

Legacy Support

(for FACET)

Engineering

Service

Center

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

Page 21

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