1. Status and Interest of the X-ray FEL projects @ SINAP
Qiang Gu
for the project team
Shanghai Institute of Applied Physics

2. SXFEL-HX User facility SXFEL-SX Test facility
SINAP FEL ROADMAP
100 10
0.1 nm
103
1990
2000
2005
2010
2015
2020
104
105
106
year
1995 1
SXFEL-HX User facility
SXFEL-SX
User facility
SXFEL-SX Test facility
DCLS
SDUVFEL
Short wavelength
SFEL
long wavelength
SERL
THz based on e-

3. Shanghai X-ray FEL test Facility
Linac
Radiator
Bunch charge (nC)
0.5
Beam energy (GeV)
0.84
Bunch length (ps, FWHM)
≤ 1.0
Norm. emit. (mm.mrad, rms)
< 2.0
Energy spread (rms)
< 0.15%
Rep-rate (Hz)
1-10
Peak current (A)
≥ 500
Scheme
HGHG-HGHG/
EEHG-HGHG
Harmonics
6 × 5
FEL wavelength (nm)
8.8
FEL pulse length (fs)
< 100fs
FEL power (MW)
>100

4. Key components
PC gun
C band acc. system
Undulator unit

5. Schedule 2013.2, Approval of the feasibility study
2014.5, Approval of the preliminary study
, Ground breaking
, Utility installation starts
2016.6, Linac installation starts
2016.9, Linac commissioning starts
, First Lasing

6. Shanghai X-ray FEL User Facility
Zhangjiang Integrated National Science Center was approved by the central government in Feb
Advanced scientific and technological infrastructure will be established in the center. The Shanghai X-ray FEL user facility is an important part of the center.
The user facility will be constructed based on the test facility with some major upgrade.
Parameters
Undulator I
Undulator II
Unit
E-beam energy
1.5
GeV
Bunch charge
~0.5
~0.25 nC
Nor. Emittance
≤1.5
umrad
Peak current
≥700 A
FEL wavelength ~3 ~2 nm
FEL pulse length
~100
~300 fs
FEL peak power
≥100 MW

7. Linac upgrade : 1 S band, 4 C band and 1 X band RF station added
Radiator upgrade: 7 undulators units added

8. SSRF
SXFEL test facility
SXFEL user facility
SXFEL

9. Hard X-ray FEL user facility
The project proposal of Hard X- ray FEL user facility has been reviewed by the expert committee for National Development and Reform Committee of central government.
The project now is one of the candidates of the Major National Science and Technology Projects of the 13th five-year plans (2016~2020) in China.
Parameters
Value
Wavelength (nm)
0.1/0.06
Bunch charge (pC)
250
e- Energy (GeV) 6
Norm. emit. (umrad)
0.4
Energy spread (sliced)
0.01
Pulse length (fs)
100
Peak current (kA) 3 ρ
3.41*10-4
Peak power (GW) 10
Peak brightness
2*1033
Rep. rate (Hz) 50

10. Injector is based on the S band technology
Injector is based on the S band technology. C band and X band Linac scheme with different gradient have been compared.
eSASE, self-seeding and other operating scheme are under evaluation to generate fully coherent, ultra shot hard X-ray FEL.

11. X band system Klystrons (delivered to SINAP in 2017)
Toshiba E37115 (11.424GHz, 6MW, 2/6.5us(RF/HV))
CPI VKX-8311B (11.424GHz, 50MW, 1.5us)
1m TWS with SLED for linearizer of soft X-ray FEL test facility and for CLIC-collaboration
0.75m*2 TDS for soft bunch length measurement of soft X-ray FEL user facility
High gradient issues/high power RF components, such as design, manufacture
High power test system integration and experiment
Phase and amplitude stability improvement
Wake field optimization and wake field monitor for alignment
Two stage/high efficiency RF compression

12. Test facility for hard X-ray FEL R&D
The SDUV-FEL will be shutdown this summer and some components will be moved to SXFEL.
A project proposal on X band system R&D should be approved soon by the Minister of Science and Technology.
We hope to build an new test facility on RF gun test, X band system test, beam measurement and manipulation, which could be used to evaluate new methods and techniques for the hard X-ray FEL facility.