DESY/ XFEL Status - SLACPortalWelcomePage

XFEL The European

X-Ray Laser Project

DESY/ XFEL Status

EPICS Collaboration Meeting

SLAC, April 25, 2012

Matthias Clausen, DESY

Cryogenic Controls Group – MKS-2

XFEL The European

X-Ray Laser Project

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DESY/ XFEL Status, 25-April-2012

Outline - Status

• The European XFEL

• Control Systems for the e-XFEL

• EPICS @ DESY

• IOCs

• Redundancy

• Simulation

• CSS

XFEL The European

X-Ray Laser Project

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Superconducting Accelerators @DESY



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FLASH

Superconducting

Cavities

–271°C

XFEL

XFEL The European

X-Ray Laser Project

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4

3,4 km total length from Hamburg

to Schenefeld in Schleswig Holstein (different State in Germany)

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X-Ray Laser Project

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Properties of the X-ray laser flashes

Flashes per second 27 000

This high repetition rate is what makes the

European XFEL unique among the X-ray

lasers in the world. It is only possible

thanks to the superconducting accelerator

technology.

Wavelength 0.05 to 6 nanometres

The wavelengths of the X-ray flashes of

the European XFEL are so short that even

atomic details become discernible.

Duration less than 100 trillionth of a second (less

than 100 femtoseconds)

Thanks to this extremely short pulse

duration, scientists will be able to film e.g.

the formation of molecules or the reversal

of magnetization.

Brilliance (peak value) 5·1033 (photons / s / mm2 / mrad2 / 0,1%

bandwidth)

The peak brilliance is a billion times higher

than that of the best conventional X-ray

sources. The brilliance describes the

number of photons of a given energy that

are emitted per second, area and angle

within a small energy interval.

Brilliance (average value) 1,6·1025 (photons / s / mm2 / mrad2 / 0,1%

bandwidth)

The average brilliance is 10 000 times

higher than that of the best conventional X-

ray sources.

Coherence yes

The X-ray flashes have the characteristics

of laser light. This makes it possible to take

3D images at the atomic level.



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X-Ray Laser Project

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XFEL Overview

Schenefeld:

Science with X-ray flashes

DESY-Bahrenfeld:

Start of the3,4 km long XFEL

Osdorfer Born:

first split of the tunnel

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X-Ray Laser Project

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Status of Tunnel boring Total length of completed tunnels 90.9 %5246 m of 5777 m



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X-Ray Laser Project

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XFEL Control Systems

PETRA-II/

DORIS/ DESY/

Linac: TINE/

EPICS*

FLASH:

DOOCS/ TINE

EPICS*

*Cryo/ Utility:

EPICS

XFEL: DOOCS/

TINE/ EPICS*

Beamline and

Experiment

Control: NEW

General:

Machine Control: TINE/ DOOCS

*Cryo/ Utility: EPICS

XFEL Beamline: NEW PETRA-III Beamline: Tango

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X-Ray Laser Project

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EPICS as a SCADA system

• Utility group uses IOCs to communicate with PLCs

• Control logic in PLC

• Display, Alarm, Archive configured by utility group

EPICS as a process control system

• Cryogenic control group runs all control logic* inside of

(redundant) IOCs

XFEL (start of operations: spring 2015)

• AMTS Accelerator Module Test Facility ( October 2012)

• Cryogenic Plant ( Spring 2013)

• Cold Compressors ( Spring 2014)

• XFEL Tunnel Cryogenics ( Summer 2014)

*except machine protection logic

EPICS @ DESY

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X-Ray Laser Project

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cPCI Crates:

• Slots: 1x CPU/ 3x I/O

Two form factors:

• 19“ redundant (2 in 1)

• DIN rail

NO Fan

Both with redundant PS and

optional monitor board

Current IOC Generation

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X-Ray Laser Project

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CPU Intel® Atom™ N270, 1.6 GHz

DRAM Max. 2 GByte soldered DDR2

Chipset Intel® 945GSE and ICH7-M

4HP Version 2x Gigabit Ethernet, CRT, 2x USB 2.0, 2x LEDs

8HP Version DVI, COM1, 2x USB 2.0, PS/2, Reset, HDD Carrier

CPU L2 Cache 512 kByte

DRAM speed 533 MHz

Ethernet 2x 1000Base-Tx

Flash Disk CompactFlash socket

Graphics 945GSE internal

Power Consumption 10 W / 1.6 GHz with 2 GB RAM

Rear I/O Optional

Current CPU Kontron CP 305

Features

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X-Ray Laser Project

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Stable operations are mandatory for cryogenic plants.

They shall be running 24/7 for a year or more.

Currently any cryogenic shutdown causes operation shutdowns

of at least 2-4 hours.

In the future a trip of the cryogenic cold compressors will stop

machine operations for at least 10 to 14 hours.

IOC operations should not cause any trip!

Redundancy is used whereever possible

Listen to:

Friday 11:15 Experience Using Redundant IOCs Jörg Penning

Redundancy

XFEL The European

X-Ray Laser Project

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Simulation Setup



IOC IOC

Profibus

simulated I/O

AND

simulated process

real

process

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X-Ray Laser Project

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Simulation Experience

Simulation with original EPICS database including the

original I/O configuration has several advantages:

• Unchanged database for testing

• Identical I/O behavior

• Testing failover of Profibus fieldbus in redundant IOCs could not

be debugged without it!

Adding simulation of device behavior and even

process behavior adds:

• Testing and debugging record based logic

• Testing and debugguíng of SNL programs

It‘s worth the effort!!



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X-Ray Laser Project

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CSS @ DESY

Development in close collaboration with SNS and BNL

See:

Wednesday 05:20pm CSS: Where do we want to go? - Gabriele Carcassi

Used in production in cryogenic control room

• SDS (graphics), alarm-table, message-tables, archive table, AMS (alarm

management), trend plotter

Utility group is actually moving from X-Window apps to CSS

• SDS (graphics), alarm-tree*, AMS, trend plotter

Engineering:

• DCT (database creation tool), I/O Configurator, SNL editor, IOC remote

management

*See: Wednesday 04:40pm CSS for Alarm Handler(alh) Users - Jörg Penning



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X-Ray Laser Project

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