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![Page 1: Status of CSNS Project - CERN · PDF fileStatus of CSNS Project Shinian FU for CSNS Team Institute of High Energy Physics˜CAS On PAC09, Vancouver, Canada, 4-8,May,2009](https://reader033.vdocuments.net/reader033/viewer/2022051320/5a71363b7f8b9ab1538ca1a1/html5/thumbnails/1.jpg)
Status of CSNS Project
Shinian FUfor CSNS Team
Institute of High Energy Physics�CAS
On PAC09, Vancouver, Canada, 4-8,May,2009
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2PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Contents
• Project Overview
• Accelerator Design
• R&D Activities
• Collaborations
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3PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
1, Project Overview
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4PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Project Overview
Why a spallation neutron source in China?• There are three synchrotron radiation light sources in PRC, but no
spallation neutron source.
• A 60MW reactor CARR will soon commission at CIAE in 2009. It provides continues neutron beams for researches.
• CSNS is demanded by a large user community in multidiscipline research, because it is a complement to SR and reactor.
• CSNS can also promote the development of ADS ( Accelerator Driver Subcritical system) in China, which is recognized as the best option for nuclear waste transmutation for nuclear power station.
• The CSNS accelerator technology can be transferred to proton therapy.
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5PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Milestones • 2005. 6: “political approval” (CD-0)
– central government approval & fund allocation
• 2006.1 -: CAS funded R&D 1 (35 M CNY)
• 2007.7 -: Guangdong funded R&D 2 (40 M CNY)
• 2007.12 -: “project establishment review”
– Budget baseline: 1.4 B CNY + 0.5 B CNY (Guangdong) + land
• 2008.6: environmental impact assessment completed
• 2008.9: “project establishment approval” (CD-1)
• 2010: ground breaking expected
– Need to pass feasibility review and preliminary design reviews
Project Overview
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6PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Project Overview
CSNS in Guangdong will be a new branch of IHEP, with 450 new positions.
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7PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Project Overview
CSNS facility layout
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8PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Primary design parametersPhase I II II’
Beam power on target [kW] 120 240 500
Beam energy on target [GeV] 1.6 1.6 1.6
Ave. beam current [μA] 76 151 315
Pulse repetition rate [Hz] 25 25 25
Protons per pulse [1013] 1.9 3.8 7.8
Linac energy [MeV] 81 132 230
Linac type DTL DTL DTL+SCL
Target number 1 1 2
Target material Tungsten
Moderators H2O (300K), H2(20K)
Number of spectrometers 3 18 18
Project Overview
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9PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
HongKong
Shenzhen
Guangzhou
Dongguan
CSNS
Project site study
Project Overview
CSNS is the first large scientific facility in southern part of China. It can balance the present uneven distribution of the facility, and promote advanced researches in the economic developed zone of Guangdong-Hongkong.
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10PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Project Overview
• CSNS is located in a well-developed zone of science and high-tech park- Song San Lake.
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11PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
• Fit in China’s present economical situation
– Total phase-I cost ~1.46B CNY (~US$188M)
• An advanced facility with upgrade potential
– Phase I beam power goal: 120 kW; phase II: 240 kW
– Expandable to higher power/2nd target
• Adopt mature technology as much as possible
– First high-intensity proton machine in China
– High reliability for our users
• Closely collaborate with world leaders & develop domestic technology to control cost
– Keep final fabrication in China as much as possible
Design philosophyProject Overview
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12PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
2, Accelerator Design
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13PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
• Accelerator major design parametersPhase I Phase II
Beam power on target [kW] 120 240Proton energy on target [GeV] 1.6 1.6Average beam current [μA] 76 151Pulse repetition rate [Hz] 25 25Peak ion source H- current [mA] 20 40Peak linac H- current [mA] 15 30
Linac energy [MeV] 80 132
Ring RF frequency [MHz] 1.01 ~2.4 1.01 ~ 2.4Maximum cycling current [A] 3.6 7.2Protons per pulse [1013] 1.9 3.8
Linac type DTL DTLLinac RF frequency [MHz] 324 324Linac beam duty [%] 1 1
Chopper bean-on duty factor [%] 50 50
RCS ring circumference [m] 230 230RCS harmonic number 2 2
Accelerator Design
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14PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Accelerator Design
• Hands-on maintenance: ~ 1 W / m uncontrolled beam loss
• Upgradeable with increased injection energy
• 4-fold symmetry: separated injection, extraction, collimation straights
• FODO arc and doublet straight
• Both localized & 2-stage momentum collimation possible
• Multi-turn injection with dc chicane for simplified design
• One-turn extraction without bump
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15PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Accelerator Design
• 324MHz Linac, with additional tunnel for upgrade
Tank number 1 2 3 4 5 6 7 total
Energy (MeV) 21.8 41.7 61.3 80.898.9
116
132.2
132.2
Tank length (m) 7.99 8.34 8.5 8.858.69
8.57 8.67 59.6
Number of cell 61 36 29 26 23 21 20 216RF driving
power (MW) 1.41 1.41 1.39 1.451.45
1.45 1.49
10.05
Total RF power (MW) 1.97 2.01 1.98 2.03
1.99
1.96 1.98
13.92
Accelerating field (MV/m)
2.06 to 3.1 3.1 3.1 3.1 3.1 3.1 3.1
Synchronous phase
-30 to -25 -25 -25 -25 -25 -25 -25
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16PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
•Rapid cycling synchrotron layout
Four major functions--- injection, acceleration, collimation and extraction are arranged in the four dispersion-free straight sections.
The magnetic field cycle and beam manipulation phases in the RCS
Accelerator Design
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17PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
3, R&D Activities
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18PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
• Two Phases R&D:
1. 2006-2007, $3.8M from CAS
2. 2007-2008, $5M from Guangdong local government.
R&D
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19PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
R&D
HH-- ion source: four Hion source: four H-- ion source ion source bodies were fabricated at IHEP bodies were fabricated at IHEP and test at ISIS with a and test at ISIS with a satisfactory results (55mA pulse satisfactory results (55mA pulse current ).current ).
A test stand is constructing at IHEP A test stand is constructing at IHEP for longfor long--term reliability verification term reliability verification of the ion source.of the ion source.
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20PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
R&D
• RFQ technology has been developed in an ADS program
46mA output beam at 7% duty factor, transmission rate>93%. Now to 15% duty.
A 3.5MeV RFQ has been commissioned at IHEP with the kind support of the RF power system from CERN.
WE4PBC03
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21PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
R&D• DTL tank: explosive bonding and electroform
technologies are developed for tank copper liner.
• Electroformed coil� the same as J-PARC.
The first module of the first tank is in fabricating as a prototype.
Drift tube by electron welding.
Sakae coil and quadrupole at rotating coil measurement
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22PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
R&D����
AC resonant HV pulsed power supply for klystron was proposed and devised.
R&DLinac RF power system
FPGA based digital LLRF control system.
Frequency Convert
9%
±1%
±1°
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23PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
R&D• Dipole and quadrupole are prototyped. AC measurement
system developed for dipole, with a good preliminary result.
Problem: cracking in epoxy resin
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24PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
R&D• Power supply for dipole magnet
White resonant circuit was chosen as the power supply for the magnets with a large conductivity. It is composed of DC (1260A)+ AC( 900A) sources, choke, and capacitor bank.
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25PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
R&D• A prototype of the ferrite loaded RF cavity: 1 – 2.5 MHz
Between each ferrite plates is a copper plate with cooling water for heat release. The copper plate is formed by winding a hollow copper conductor.
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26PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
R&D• Injection bumper magnet and power supply are prototyped
A pulsed power supply with 18,000A output current in maximum during injection time of 500μs connected with the bump magnet for the magnet measurement.
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27PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
R&D
Merits and demerits for 10 kickers scheme: Ease to kicker magnet and power supply performanceLess perturbation to beam in case of 1 kicker malfunction
Extra space and money
5 twin-C vs. 10 single turn kickers
Kicker
Extraction
The pulse power supply uses blumleintype pulse forming network to get a short pulse with a current of 5840A and a flattop of better than ±1.5%
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28PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
• Ceramic vacuum chambers for magnets
R&D
• Ceramic vacuum chamber of large aperture/length– Metallic brazing (J-PARC) and glass joint (ISIS)
• detachable, external metal-strip wrappings for the RF shielding
• Quadrupole duct developed by domestic vendor
• Dipole duct: parallel development in progress (assistance from ISIS and J-PARC)
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29PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Collaboration• CSNS has a wide cooperation with foreign labs:
1. LBL
2. ANL
3. SNS
4. BNL
5. LANL
6. RAL
7. CERN
8. Julich
9. INFN
10. KEK & JAEA
11. KAERI
12. …
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PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
CONCLUSIONS
• CSNS is highly demanded for multidiscipline research in China.
• It will be built in southern part of China, starting in 2010 and completing in 2016.
• It is designed with the capability for upgrade from 120kW to 500kW.
• Most of the key components are under prototyping.
• Calling for more new participants from all the world.
• A close collaboration with world laboratories goes well.
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31PageStatus of CSNS Project, PAC09, Vancouver, May 7, 2009
Thanks!