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
2
Matthias Clausen, DESY
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
3
Superconducting Accelerators @DESY
Matthias Clausen, DESY
DESY/ XFEL Status, 25-April-2012
3
FLASH
Superconducting
Cavities
–271°C
XFEL
XFEL The European
X-Ray Laser Project
4
4
3,4 km total length from Hamburg
to Schenefeld in Schleswig Holstein (different State in Germany)
XFEL The European
X-Ray Laser Project
5
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.
Matthias Clausen, DESY
DESY/ XFEL Status, 25-April-2012
XFEL The European
X-Ray Laser Project
6
6
XFEL Overview
Schenefeld:
Science with X-ray flashes
DESY-Bahrenfeld:
Start of the3,4 km long XFEL
Osdorfer Born:
first split of the tunnel
XFEL The European
X-Ray Laser Project
7
Status of Tunnel boring Total length of completed tunnels 90.9 %5246 m of 5777 m
Matthias Clausen, DESY
DESY/ XFEL Status, 25-April-2012
XFEL The European
X-Ray Laser Project
8
8
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
XFEL The European
X-Ray Laser Project
9
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
XFEL The European
X-Ray Laser Project
10
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
XFEL The European
X-Ray Laser Project
11
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
XFEL The European
X-Ray Laser Project
12
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
13
Simulation Setup
Matthias Clausen, DESY
DESY/ XFEL Status, 25-April-2012
IOC IOC
Profibus
simulated I/O
AND
simulated process
real
process
XFEL The European
X-Ray Laser Project
14
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!!
Matthias Clausen, DESY
DESY/ XFEL Status, 25-April-2012
XFEL The European
X-Ray Laser Project
15
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
Matthias Clausen, DESY
DESY/ XFEL Status, 25-April-2012
XFEL The European
X-Ray Laser Project
16
Questions ?
Matthias Clausen, DESY
DESY/ XFEL Status, 25-April-2012