1. ADS Accelerator Program in China
Weimin Pan
Institute of High Energy Physics, CAS
Beijing, China
(TTC, Dec. 5, 2011)

2. Contents 1. Introduction 2. Road map of ADS in China
3. key technology R&D for ADS accelerator
at Phase I
4. Summary

3. 1. Introduction

4. Nuclear Power in China Until Sept. 2009
Operation reactor 11 sets，total power 9.1GWe;
Constructing reactor 24 sets，total power 25.4GWe，is the largest construction scale in the world;
According some estimation:
>70 GWe NPP in operation and 30GWe NPP under construction; >5% ratio of NP to total electricity in 2020
~10% ratio of NP to total electricity in 2030
in 2050, >400 GWe NPP may be more than total nuclear power in the world right now ! 4

5. Nuclear waste is a bottleneck for nuclear power development.
ADS has been recognized as a good option for nuclear waste transmutation.
As a long-term program, ADS R&D has been supported by CAS.
Budget requested of ADS R&D (Phase I) has been approved by government .

6. 2. Road map of ADS in China

7. General principle discription of ADS
Proton
Neutron
Proton Linear Accelerator
Liquid Metal Target
Reactor
(PbBi coolant )

8. General parameters of ADS
Proton
Energy
1.5
GeV
Current 10 mA
Beam power 15 MW
Frequency
162.5/325/650
MHz
Duty factor
100 %
Beam loss
<1
W/m
Beam trip/year
<25000
<2500
<25
1s<t<10s
10s<t<5m
t>5m

9. Road map of ADS development9

10. (Target & Accelerator)
Basic Organization
CAS Leader
IHEP， CAS
(Proton Accelerator)
IMP， CAS
(Target & Accelerator)
Hefei Institutes
Physical Science, CAS
(Reactor)
Spoke cavity
group
Physics design
group
RFQ group
ECR ion source
group
……,
20 groups

11. Generally, IHEP, as leading institute, is in charge of ADS proton accelerator .
Injector I and II are being studied by IHEP and IMP respectively, the different technical ways are adopted in two institutes.
The main accelerator with 10～50MeV will be established by IHEP as leading institute.

12. Target of R&D (Phase I) in accelerator
Verify the feasibility of preliminary design for accelerator with low energy through joint study on key technologies:
beam dynamics
sc cavities, high power couplers
ion source with high beam
solid state RF power source
cryogenic system
RFQ with CW
beam diagnostic system
digital power source …… 12 12

13. Status of R&D of high power proton accelerator（IHEP/IMP）
3.5MeV RFQ has been commissioned at IHEP with the ECR ion source, the LEBT and a post beam line for diagnostics.
北京强流RFQ加速器
A four-vane RFQ with a total length of 4.8m long at 352MHz. Pulse : ≥7%, beam energy: 3.54MeV,
beam current: 45mA. 13 13

14. ECR ion source (IMP, Lanzhou)

15. SC lab for vertical test & surface treatment
Cryogenic Plant
BEPCII Storage Ring
SC lab of 230m2
Helium Cycling System will be built for SRF Lab soon to make the vertical test cheaper and easier. 15

16. SC Laboratory equipments

17. Progress of multi-cell superconducting cavity
in IHEP (1.3GHz ILC type, large grain)

18. First vertical test result

19. Progress of 500MHz superconducting cavity in IHEP (BEPCII spare )

20. Q0 ~ Eacc （Vc）of H.T. for BEPCII Spare Cavity

21. High power input coupler
内导体天线
电子束焊
(焊缝)
窗面清洗

22. Window & Inner conductor
High power test of input coupler
Window & Inner conductor
High power test of input coupler
≥420kW

23. Cryostat for BEPCII spare cavity

24. Cryomodule named PXFEL1 was passed the cryogenic test at DESY in July

25. 3. R&D of key technologies of ADS accelerator at Phase I
A high intensity RFQ with CW
Low and Medium beta SC cavities

26. Main RFQ design parameters
Value
Frequency (MHz)
325
Injection energy (keV) 35
Output energy (MeV)
3.2128
Pulsed beam current (mA) 15
Beam duty factor
100%
Inter-vane voltage V (kV) 55
Beam transmission
98.7%
Average bore radius r0 (mm)
2.775
Vane tip curvature (mm)
r / r0
1.0
Maximum surface field (MV/m)
28.88 (1.62Kilp.)
Cavity power dissipation (kW)
[1.4* Psuperfish (194.96)]
Total power (kW)
320.94
Avg. Copper power/Length (kW/m)
41.68
Avg. Copper power/Area (kW/cm2)
3.25
Max. copper power/Area (kW/cm2)
3.77
Input norm. rms emittance(x,y,z)(πmm.mrad)
0.2/0.2/0
Output norm. rms emittance(x/y/z) (πmm.mrad/Mev-deg)
0.2/0.2/0.0612
Vane length (cm)
467.75
Gap1(entrance) (cm)
1.10
Gap2(exit) (cm)
Accelerator length (cm)
469.95
Study on RFQ with CW , based on the 352MHz pulsed RFQ

27. R&D for the superconducting cavities
For IHEP, only spoke cavity will be studied and fabricated in Phase I .

28. Structure design of Spoke012
Main structure sizes:
Lcav: 170mm
Liris: 74mm, iris to iris 长度
W: 89 mm, Spoke 宽度
T: 29 mm, Spoke 厚度
Dbeam: 35 mm, 束管直径
Dcav:438mm, 腔体直径

29. 4. Summary
CAS has started ADS program, and being to speed up ADS from the present basic study to DEMO facility for nuclear waste transmutation .
The R&D of key technologies in high intensity proton accelerator for ADS is underway .
There are many common interests in the high power proton acceleration technology for the accelerator Labs in the world. Close international cooperation's are looking forward.

30. Thank you very much for your attention !