E. MatiasCanadian Light Source

June 2009 – Presentation to - NSLS II EFD Division

CLS Beamline Controls

• The CLS• Current System – EPICS Beamline Controls• Next Step – EPICS & ScienceStudio

Where is Saskatoon?

What are the CLS Objectives?

170.88 m circumference 2.9 GeV DBA lattice with 12-fold periodNominal Tune:

x = 10.22 y = 3.26Eloss per turn: > 0.876 MeVBend magnet radiation: c = 1.6 Å Ec = 7.6 keVx = 18.1 nm•radDamping times:

x = 2.4 ms, y = 3.8 ms, E = 2.7 ms~10 mm bunch length

MAX-IITLS-I

BESSY-IIALS

ELETTRA

PLS

SLS(240m)

ANKA

ESRF APSSpring-8

CLS (171m)SPEAR3 (240m)

Super-SOR LSB BOOMERANGTLS-II

SOLEIL(2006,354m)

NSLS-II

DIAMOND(2007,562m)

ESRFAPS Spring-8ELETTRA

1

10

100

0 1 2 3 4 5 6 7 8 9Energy(GeV)

Em

ittan

ce(n

m·r

ad)

KSRS (124m)

• Phase 1 (operation):– Total of 7 scientific and 2

diagnostics beamlines.• Phase 2 (commissioning):

– Total of 7 additional beamlines and

– building expansion for medical imaging.

• Phase 3 (pre-design):– Total of 7 additional

beamlines and– building expansion.

• The CLS• Current System – EPICS Beamline

Controls• Next Step – EPICS & ScienceStudio

EPICS

DetectorsCameras etc.

ModbusTCP/IP

GPIB

RS-232

Channel A

ccess Protocol

IOC

IOC

IOC

IOC

State MachineEngine

CA

CA

CA

CA

CA

Single BoardComputer

CA

Operator WorkstationUser Applications

TouchPanels

CA

CA

Telemecanique Momentum PLC

VME

IOCCA

Beamline Controls Interfaces

• EPICS Tools • Configuration Tool• User GUI & ROOT

Beamline Visualization

As Map

- Raster scan with fluorescence spectroscopy of a pine needle contaminated with arsenic. The technique allows multiple elements to be detected simultaneously at each point of the raster. These images show distributions of arsenic, iron, and manganese, respectively, near the tip. The highest intensity displays in red, lowest in blue.- Custom on-line plotting application scripted in CERN Root, with data stream from the CLS data acquisition application. (G. Wright, R. Igarashi, K. Chang-Yong, N. Chen)

Fe Map

Traditional Beamline Visualization

Cross section views of the beam spot intensity distribution for varying degrees of monochromator detuning (50-80%). (Only one image shown).

(G. Wright, R. Igarashi, K. Chang-Yong, N. Chen)

Fill Monitor (in Single Bunch)

Fill Pattern Monitor (Normal)

Matlab

• Sometimes used for prototyping (taking into account single threaded limitations)

Structure

GUI (EDM, Qt, Root)

Scan and Data Management Libraries

EPICS PV(Abstract PVs)

EPICS Low Level(Motor and Detector PVs)

EPICS Drivers (vendor drivers)

Higher Level Tools

Full Support:• EDM• CLS Scanning Tool• Qt (C/C++)• Root• Matlab• Java• synapps

Partial Support:• Spec• Labview• Python• Tcl/Tk• Python• MEDM• synapps

• The CLS• Current System – EPICS Beamline Controls• Next Step – EPICS & ScienceStudio

Scientific American May 2008Science 2.0 – The Risk and Reward of Web-Based Research

---------------------------------

“Our real mission isn’t to publish journals but to facilitate scientific communication” Timo Hannay – Head of Web Publishing at Nature Publishing Group

What Is the Web 2.0?

• In plain English ….– Automating tedious tasks using web technology– Tools to help people and software collaborate

20

Team: People and Orgs

Remote ControlUser ServicesSystem DeploymentIntegration

System Architecture

System RequirementsTestingData Analysis/Grid Computing

User Office SoftwareScientific Workflow Engines

21

Team: People and Orgs

Dionisio MedranoDylan MaxwellDong LiuElder MatiasDaron Chabot (now NSLS)

Chris ArmstrongJohn Haley

Jinhui Qin Nathaniel Sherry (student)Mike BauerStewart McIntyreMarina Suominen Fuller

Yuhong YanZahid Anwar (student)

Requirements

• New User Office Functionality– Proposal submission– Peer review– User Feedback Tracking– Experiment Management– User Training/ Safety Testing

• Remote Beamline Access• Integration with grid data-storage• Grid computing

System Architecture

WebApplication

BeamlineControlModule

DB SAN

JMS CA

VESPERS

HTTP

1. VESPERS Beamline2. EPICS control system3. Beamline Control Module (BCM)4. Web Application5. Database6. File Storage7. Web Interface

VESPERS Beamline

• VESPERS — Very Sensitive Elemental and Structural Probe Employing Radiation from a Synchrotron

• A bending magnet beamline on sector 6 at the Canadian Light Source synchrotron in Saskatoon, Saskatchewan.

• A hard x-ray microprobe with an energy range of 6 to 30keV.

• Techniques: X-Ray Fluorescence (XRF) & X-Ray Diffraction (XRD)

WebApplication

BeamlineControlModule

DB SAN

JMS CA

VESPERS

HTTP

EPICS Low-level Control System

• EPICS — Experimental Physics and Industrial Control System

• The standard control system at the CLS.

• EPICS consists of a network of Input-Output Controls (IOCs) which are connected to directly to devices.

• An IOC provides many Process Variables (PVs) which relate to either an input or output from a device and have a unique name.

• Channel Access (CA) is used to read or write to any PV without knowing which IOC provides the PV.

• More than 50,000 PVs in the CLS control system.

WebApplication

BeamlineControlModule

DB SAN

JMS CA

VESPERS

HTTP

Beamline Control Module (BCM)

• The BCM provides a high-level interface to the low-level control system (EPICS).

• Logical and physical separation of business logic and control logic.

• Virtual device abstraction that provides independence from low-level control system.

• Virtual devices can be logically organized into a device hierarchy.

• Basic devices can be combined to build more functional devices.

• Communication with external applications using two message queues (ActiveMQ).

WebApplication

BeamlineControlModule

DB SAN

JMS CA

VESPERS

HTTP

Web Application

• A J2EE Servlet application that provides a web-based interface Science Studio.

• Tools: Spring (MVC), iBATIS (ORM), JSecurity (Apache Ki), Apache Tomcat

• Divided into two parts: the Core application and the VESPERS beamline application.

• Core application is responsible for providing access to the business objects.

• VESPERS application is responsible for remote control of the VESPERS beamline.

WebApplication

BeamlineControlModule

DB SAN

JMS CA

VESPERS

HTTP

Database

• Metadata associated with the operation of a remote controlled beamline and the organization of experimental data collected on that beamline.

• A project is the top level organizational unit and is associated with a project team.

• A session defines a period of time allocated to a project team to conduct experiments.

• An experiment relates a sample and the technique being applied to that sample.

• A scan records the location of the acquired experimental data.

WebApplication

BeamlineControlModule

DB SAN

JMS CA

VESPERS

HTTP

Experimental Data Storage

• Experimental data is stored at the CLS.

• Common directory structure shared with other beamlines. • A large data storage facility is now operational at the University of

Saskatchewan as part of WestGrid.

WebApplication

BeamlineControlModule

DB SAN

JMS CA

VESPERS

HTTP

VESPERS Web Interface

• Rich web interface to Science Studio and the VESPERS beamline.

• Designed to be used over commodity broadband internet.

• Developed for the Firefox web browser without any additional plugins or extensions.

• Known to work with other browsers, but requires the Canvas HTML tag.

• AJAX is used for the VESPERS interface to provide device values in pseudo real time.

• ExtJS, a JavaScript framework, provides many advanced GUI elements.

WebApplication

BeamlineControlModule

DB SAN

JMS CA

VESPERS

HTTP

Beamline Setup

Experiment Setup

XRF (X-Ray Fluorescence)

Beamline Hutch Cameras

Experimental Data Viewer

ScienceStudio

Scanning

X-Ray Fluorescence (XRF): Reveals Elemental CompositionCharacteristic Element Lines Selected and Mapped Over a 2D Scan Area

S: Kα Cr: Kα & Cr: Kβ Fe: Kα & Fe: Kβ Ni: Kα & Ni: Kβ

2D Maps Generated for Selected Elemental Lines

X-Ray Diffraction (XRD): Reveals Structural InformationPeak Fitting and Indexing of Image Set to Create a Grain Orientation Map

Peak Search

Old IDL Programme – Matched Peak

Old IDL Programme – Matched Peak

New C Programme – Matched Peak

New C Programme – Expected Peak

The XRD Indexing programme examines the locations of peaks in an image in order to determine the kind of lattice structure the samples constituent atoms are arranged in. Shown here are the results of an older indexing programme written in IDL, and the new indexing programme, written in C. The new indexing programme is proving to be more versatile, and more reliable than the old programme, often indexing sets of data that the old programme failed with.

Grain Orientations

Indexing Process

User Training Module

User Training Module

User Office Workflow Example

Prototype Implementation1. CLS issues a call for proposals and gives deadline2. Beamline users submit proposals3. User Office administrator ends registration or extends deadline4. User Office administrator assigns proposals to user office reviewers5. Reviewers look at proposals and rank them6. User Office looks at ranking and chooses the proposals to accept7. Accepted proposals contact persons are notified8. Beamline User completes training (web service)9. After training is completed (simulated by a delay) the CLS is notified

The End

Thank you.