Status of the X-ray FEL control system at SPring-8

ICALEPCS07, Knoxville, 16-Oct-2007

Status of the X-ray FEL control system at SPring-8

T.Fukui1, T.Hirono2, N.Hosoda1 , M.Ishii2, M.Kitamura1 H.Maesaka1,T.Masuda2, T.Matsushita2, T.Ohata2, Y.Otake1, K.Shirasawa1,M.Takeuchi2, R.Tanaka2,

A.Yamashita2

1RIKEN Spring-8 Joint-Project for XFEL, Hyogo,679-5148, Japan

2JASRI/SPring-8, Hyogo 679-5198, Japan


Contents• Overview of the X-ray FEL• Control System

– Hardware Component– Software– Network

• Project Schedule

• Summary


What is X-ray FEL (XFEL) at SPring-8

• Generate brilliant coherent X-ray with wavelength of below 0.1nm

• Consists of a low emittance electron gun, linear accelerator and in-vacuum undulators.– No mirror is available below 100nm

S N S N S N S N S N S N S N S N S N S N S N S N S N S N S N S N S N S N

S N S N S N S N S N S N S N S N S N S N S N S N S N S N S N S N S N SN

Gun Linear Accelerator Insertion Device Laser

Random Distribution Micro-bunched


Birds-eye view of the XFEL produced with CG

~700mSPring-8

XFEL

SCSSTest Acc.


Layout of the XFEL

Chicane Undulators(4.5m*18units)

Beam dump

C-band (52units)DeflectorCavity

C-band(12units)

S-band(4units)BC1 BC2 BC3Gun

Deflector

238MHz

476MHz

L-band

L-bandCorrection

C-bandCorrection

0.5MeV1μs -> 1ns 1nC

30MeV50ps -> 10ps

415MeV10ps -> 1ps

1.45GeV1ps -> 0.3ps (projected)

8GeV0.3nc3kA peak To BL

Bypass


XFEL need ...• A machine must generate high density

electron bunch with a high peak intensity and a low emittance beam.– A tolerance is very tight.

• Amplitude stability < ±0.01%• 238MHz phase stability < ±0.01degree• 476MHz phase stability < ±0.02degree• C-Band Corr. timejitter < ±0.049psec

1320 - Friday October 19Y.Otake


XFEL need ...• A machine must be very stable like a

storage ring.– It is needed to suppress a temperature

change of the cavity to 0.001°C. (@238MHz ~0.2°/0.01°C).

– It is important to control environmental condition.• A water temperature• An air temperature and flow• A power line voltage

– It must take care a facility operation as well as accelerator control.


Control System

• Most of a component are same as the SCSS test accelerator. – The test accelerator is operated very well.

• The control framework is similar to the SPring-8 storage ring control system.– We will take care a slow feedback by software.

( a fast feedback by hardware )– It must be robust & scalable.

• Continuous operation • More than 100 VMEs


~ 100VME & ~250PLC


Hardware Component

• We use VMEbus for an equipment controller.– CPU

• IA-32 + Universe(PCI-VME Bridge) with Compact Flash boot

• PMC or XMC for a reflective memory

• Using OPT-VME for Magnet Control– Same as the SPring-8 linac and the SCSS

test accelerator.


• We use PLC as remote I/O system– PLC for Modulator, Inverter, Vacuum, Cooling Water – We will select a optical fiber for a PLC link.– DeviceNet will be used for to reduce a wiring.– FL-net as a Communication between PLC and VME

…………

…………OPT-RMTOPT-RMT

Optical fibers

PLC

VME

FL-net(Ethernet)

I/O signals

OPT-VMEOPT-VME


Hardware Component

• RF low level components will be installed in a water-cooled (26±0.2˚C) 19inch racks for temperature control.

– IQ modulator & demodulator

– High-speed A/D

and D/A VME boards

– Clock & trigger distribution unit

– Trigger delay VME board

Cooling water: 26±0.2°C

Cooling air

Heat E

xchanger


Hardware Component

• We use VME enclosure with a horizontal installation of boards– Avoid a vibration cause by the air to shake the

cable.

RF Low levelMagnet Power Supply etc.

Wiring space


Software• The MADOCA is used for the XFEL control

framework. – Same as the test accelerator.– The RDBMS is a key for stable operation.

• Logging data is used to find unstable parts.

• LINUX as a operating system for a operator console.– X-Mate as a GUI builder– Purify will be used for memory corruption detection

and memory leak detection.• For HP-UX, Purify help us to stable operation.


Software

• Solaris 10 x86 as a operating system for a VME CPU.– It is possible to use Solaris Container.

Vacuum

Main VMESolaris10

OS

FL-net

Zone

VacEM

RFEM

FL-net DriverInverter Modulator

OpticalPLC link


AS

MS filler DBDBPC

EM

MS

EVGEN

Sharedmemory

signal

VME

Sharedmemory

PositionData

Event driven data acquisition system

Sharedmemory

VMESharedmemory

VMESharedmemory

VMESharedmemory

VME

EMA-EV

BPM


• Gigabit Ethernet is used for a backbone of network. – Each FL-net is separated by VLAN

Giga Ether Switch

Operator Consol

TimingMagnet,Vac & Interlock

DB & File server

1000BASE-SX

Injector: 6set

S-Band : 4sets

BC1 C-Band : 12sets

MS

H-PCF

Magnet Power Supply

PLC

VME

BC2 BC2 C-Band : 52sets

Ref.Memory


Giga Ether Switch

Operator Consol

TimingMagnet,Vac & Interlock

DB & File server

1000BASE-SX

Injector: 6set

S-Band : 4sets

BC1 C-Band : 12sets

MS

H-PCF

Magnet Power Supply

PLC

VME

BC2 BC2 C-Band : 52sets

Ref.Memory

GigabitFL-net


Project Schedule• The XFEL machine construction already

started and the machine tunnel will be completed at March 2008.

• ~ 150 piles

Bedrock

GL

-50m


Project Schedule• Live Camera @ 10-Oct-2007


Project Schedule• The RF aging will start in October 2010

and the commissioning will start in February 2011.

• The test accelerator is successfully operated to generate laser pulse about 30uJ/pulse

• We will start to serve as a EUV-FEL users facility in next week.


Summary

• Most of the component was tested at the SCSS test accelerator.– The SCSS test accelerator is successfully

operated

• Some of a component has to be improved.• A commissioning of the XFEL start in

February 2011.

Documents

Status of the X-ray FEL control system at SPring-8