construction of the iren 1-st stage
DESCRIPTION
Construction of the IREN 1-st stage. V. Shvetsov FLNP. TOC. Brief history of the IREN project Decision on project reduction IREN 1-st stage parameters Scientific program for the IREN 1-st stage Tasks completed in 2006-2007 Accident with SLAC 5045 klystron – consequences & decision fork - PowerPoint PPT PresentationTRANSCRIPT
Construction of the IREN 1-st stage
V. Shvetsov
FLNP
September 27 2007 JINR SC 102-nd session
TOC
Brief history of the IREN project Decision on project reduction IREN 1-st stage parameters Scientific program for the IREN 1-st stage Tasks completed in 2006-2007 Accident with SLAC 5045 klystron –
consequences & decision fork Conclusion
September 27 2007 JINR SC 102-nd session
IREN history
Project started in 1993 with 3 years schedule, was approved by the CPP
1015 n/s integral intensity at 400 ns pulse width promised 30-50 gain in source quality in comparison with IBR-30
Designed parameters put IREN in range with most intensive resonance neutron sources (LANSCE, ORELA, GELINA)
September 27 2007 JINR SC 102-nd session
IREN history
Within 1993-1997 project financing formed k$ 870 at designed budget cost M$ 3.7
Within 1998 – 2005 project financing reached about M$ 2.4, but the project cost also raised seriously due to inflation and was estimated about M$ 5.3
At that time about 80% of accelerator equipment (including accelerating sections) were delivered to JINR; fuel elements were manufactured and delivered to JINR; IBR-30 was decommissioned
September 27 2007 JINR SC 102-nd session
Decision on project reduction
In the end of 2005 becomes clear that resources of the “Neutron Nuclear Physics” scientific direction are not sufficient for project realization
FLNP directorate proposed to reduce the project down to electron linac with nonmultiplying target
It was discussed at the JINR Directorate meeting (October 13 2005) and JINR Scientific Council 99-th session (January 19-20 2006)
“The Scientific Council recommends that the Directorate and this PAC [on nuclear physics] estimate the impact of this choice on the excellence of the scientific programme which may be reduced. “
September 27 2007 JINR SC 102-nd session
Decision on project reduction
Scientific program for reduced IREN project was reported at the 24-th meeting of the PAC for Nuclear Physics (April 6-7 2006)
“The PAC recommends that the JINR and FLNP directorates maintain the momentum of the project implementation, extend cooperation with other laboratories and institutions to construct by the end of 2007 the 1-st stage of IREN, including the electron accelerator, the stand for applied research and the neutron production target”
At the 101-st session of JINR SC the following resolution was approved: “The Scientific Council is pleased to hear that the construction of Phase I of the IREN facility is progressing on schedule and looks forward to the commissioning of IREN in late 2007. It would like to hear more about the scientific opportunities presented by Phase I of IREN.”
September 27 2007 JINR SC 102-nd session
IREN 1-st stage parameters
Initial data: E=100 MeV, I=2.5 A, dt=100 ns, f=50(150) Hz
September 27 2007 JINR SC 102-nd session
IREN 1-st stage parameters
Neutron flux density at sample position:Neutron flux density at sample position:
)uexp()(
)(
L
S)E(E s
smpl
0
0
2
1
4 2
Target 238U W
Intensity loss
87
240
Flux density at sample position loss*
5.8 (10 eV)
3.5 (100 eV)
15.8 (10 eV)
9.4 (100 eV)
September 27 2007 JINR SC 102-nd session
IREN 1-st stage parameters
IREN neutronics
September 27 2007 JINR SC 102-nd session
Ti C
u
Cu
e-
e-
H2 O
H2 O
Al
W
IREN 1-st stage parameters
Gamma-source at IREN 1015 s-1
September 27 2007 JINR SC 102-nd session
IREN 1-st stage parameters
Irradiation channels for NAAThermal neutrons spatial distribution (5.7-6.3)*109 n/cm2*s
September 27 2007 JINR SC 102-nd session
RQCDmax 10 6
Nuclear fissionNuclear fission
FundamentalFundamental
AppliedApplied
Fundamental Fundamental symmetriessymmetriesIn neutron In neutron
induced reactionsinduced reactions
Ultracold neutronsUltracold neutrons
Highly excitedHighly excitedstates of the nucleistates of the nuclei
Neutron activation Neutron activation analysisanalysis
Fundamental properties Fundamental properties of the neutronof the neutron
Neutrons in spaceNeutrons in space
Construction of the Construction of the IRENIREN
September 27 2007 JINR SC 102-nd session
Scientific program for the IREN 1-st stage
Isotopes production at IREN 1-st stageIsotopes production at IREN 1-st stage
More than 50 isotopes could be efficiently produced at IREN gamma More than 50 isotopes could be efficiently produced at IREN gamma source with (gamma, n), (gamma, 2n), (gamma, p) reactionssource with (gamma, n), (gamma, 2n), (gamma, p) reactions
FLNR experience in particular isotopes:FLNR experience in particular isotopes:
Yield calculated for IREN 1-st stage from experimental data obtained at FLNR microtronYield calculated for IREN 1-st stage from experimental data obtained at FLNR microtron
Nuclides Lifetime, h Reactions Target nuclei Reaction threshold,
MeV Yield*, (kBq / mkA h mg)
Mo9942 66 ),(100 nMo 9.62 % -8.29 240
Ac22589 240 ),(226 nRa 0.65 mkg -6.75 40
U23792 162 ),(238 nU 99.27 % -6.15 80
September 27 2007 JINR SC 102-nd session
Scientific program for the IREN 1-st stage
Isotopes production at IREN 1-st stageIsotopes production at IREN 1-st stage
0.1586
2/1
2/3
2/11
0.0
0.3146
Snm11750 (13.60 d)
Sn11750
ZrG1
Mo3
Au1a
Sn118
Au2a
Sn
Au3a
Mo
Au4a
Mo4
ZrG2
Monitors (Zr, Au, Mo)
Monitors (Zr, Au, Mo)
Samples: Natural tin 163.5 mg118Sn (98.5%) 30.4 mg
118Sn(,n)117mSnRSA ( NECSA) proposalRSA ( NECSA) proposal
Experiment performed in Feb. – March 2007 at FLNR Microtron accelerator
September 27 2007 JINR SC 102-nd session
Scientific program for the IREN 1-st stage
Gamma spectra from enriched tin sample
117mSn
Recoil energy Recoil energy ~1 keV - ~1 keV - Investigations on Investigations on chemical process for chemical process for 117m117mSn extraction are in Sn extraction are in progress. RSA students progress. RSA students and young scientists will and young scientists will join in the end of 2007join in the end of 2007
September 27 2007 JINR SC 102-nd session
Scientific program for the IREN 1-st stage
Radio-nuclides
Half -life
Main Energy,
keV
Photons Intensity,
%
Production Reaction
Reaction Energy,
MeV
Abundance of target, %
Yields, Bq/
μA h mg
117mSn 13.6 d 158.40 65.00
117Sn (γ,γ’) 118Sn (γ,n)
119Sn (γ,2n)
-0.32 -9.65 -16.13
7.57 24.01 8.5
1.02E+5
117mSn 13.6 d 158.40 65.00 118Sn (γ,n) -9.65 98.5 1.91E+5* 111In 2.83 d 171.29
245.35 91.00 94.00
112Sn(γ,p) -7.73 0.95 3.13E+4 4.04E+4
113Sn 115 d 391.71 245.35
64.17 94.00
114Sn(γ,n) 115Sn(γ,2n)
-10.32 -17.85
0.65 0.34
1.15E+5
123Sn 129 d 1032.00 1089.00
0.04 0.59
124Sn(γ,n) - 8.51 5.98 5.13E+4
99Mo 66.02 h
140.50 181.06 739.70
4.95 6.00 12.10
100Mo(γ,n) -8.29 9.62
5.4E+5
196Au 6.2 d 333.00 355.72
24.40 93.60
197Au(γ,n) -8.09 100.00 1.5E+6
89Zr 78.4 h 909.10 99.00 90Zr(γ,n)
91Zr(γ,2n) -11.99 -19.19
51.46 11.23 5.2E+5
Preliminary results of 117mSn production using FLNR Microtron electron accelerator
September 27 2007 JINR SC 102-nd session
Scientific program for the IREN 1-st stage
Neutron/gamma activation analysisNeutron/gamma activation analysisIBR-2 will stop for modernization in 2007, IBR-2 will stop for modernization in 2007, sector of NAA is planning to continue sector of NAA is planning to continue research at IREN 1-st stage:research at IREN 1-st stage:
R elative un its
Zn
Tula
Zaokskiy
Aleksin
Suvorov
Belev
Odoev
Yasnogorsk
Novom oskovskSchekino
PlavskBogoroditsk
Arsen’evo
Chern’
Efrem ov
Uzlovaya
Teploe
Kurkino
Venev
Kireevsk
Kim ovsk
Volovo
V
Tula
Zaokskiy
Aleksin
Suvorov
Belev
Odoev
Yasnogorsk
Novom oskovskSchekino
PlavskBogoroditsk
Arsen’evo
Chern’
Efrem ov
Uzlovaya
Teploe
Kurkino
Venev
Kireevsk
Kim ovsk
Volovo
Ni
Tula
Zaokskiy
A leksin
Suvorov
Belev
O doev
Yasnogorsk
Novom oskovskSchekino
P lavskBogoroditsk
Arsen’evo
Chern’
E frem ov
Uzlovaya
Teploe
Kurkino
Venev
K ireevsk
K im ovsk
Volovo
As
Tula
Zaokskiy
Aleksin
Suvorov
Belev
Odoev
Yasnogorsk
Novom oskovskSchekino
PlavskBogoroditsk
Arsen’evo
Chern’
Efrem ov
Uzlovaya
Teploe
Kurkino
Venev
Kireevsk
Kim ovsk
Volovo
BiomonitoringBiomonitoring Material scienceMaterial science BiotechnologyBiotechnology
September 27 2007 JINR SC 102-nd session
Scientific program for the IREN 1-st stage
((n,p), (n,alpha) reactions investigations at high energyn,p), (n,alpha) reactions investigations at high energy
Reaction Q, MeV Abund., %
30, b 100 eV –
1 keV 1 keV – 10 keV
10 keV – 100 keV
32S(n,)29Si 1.525 95.02 8.7·10-6 7.0·10-6 45
3.2·10-6 19
1.2·10-6 7.3
35Cl(n,p)35S 0.615 75.77 1.6·10-3 1) 8.3·10-3 56000
1) 3.5·10-4 2400
1) 1.6·10-5 110
10 res. up to 110 keV,
36Ar(n,)33S
2.001 0.337
4.9·10-5 2.2·10-6 91
8.2·10-7 37
3.4·10-7 15
45Sc(n,p)40Ca 0.526 100 9.1·10-6 3.5·10-5 35
1.4·10-5 13
5.7·10-6 5.9
50V(n,p)50Ti 2.999 0.25 3.9·10-4 7.7·10-8 3.5
3.0·10-8 1.3
1.2·10-8 0.53
64Zn(n,)61Ni 3.866 48.6 2.4·10-4 1) 4.2·10-4 2) 2900
1) 7.6·10-4 2) 5200
8.0·10-6 2) 53
2 res. up to 3 keV
67Zn(n,)64Ni 4.879 4.1 3.1·10-4 1) 1.7·10-6 11
1) 1.4·10-6 9.1
8.0·10-7 5.3
9 res. up to 4 keV
96Ru(n,)93Mo 6.381 5.52 1.5·10-5 2.1·10-7 1.5
8.3·10-8 0.53
3.3·10-8 0.23
99Ru(n,)96Mo 6.822 12.7 4.3·10-5 1.5·10-6 10
6.1·10-7 4.0
2.3·10-7 1.5
7 res. up to 600 eV
147Sm(n,)144Nd 10.114 15.0 3.2·10-5 1) 1.3·10-5 2) 91
3.3·10-7 2) 12
1.2·10-7 2) 4.6
104 res. up to 1 keV, (E) up to 300 keV
September 27 2007 JINR SC 102-nd session
Scientific program for the IREN 1-st stage
(n,p), (n,alpha) reactions investigations at high energy(n,p), (n,alpha) reactions investigations at high energy
1E-3 0,01 0,1 1 10 100 1000 100001E-11
1E-10
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
0,01
0,1
1
arbi
trar
y un
its
En, keV
kT=8 keV
kT=256 keV
Nuclear physicsNuclear physics
0 200 400 600 800-0,4-0,3-0,2-0,10,00,10,20,30,4
1E-3
0,01
0,11
10
100
fb
En, eV
np
, b
35Cl(n,p)35S reaction cross section 35Cl(n,p)35S reaction cross section and forward-backward coefficient. and forward-backward coefficient. Dashed lines indicate error corridor Dashed lines indicate error corridor due to uncertainties of experimental due to uncertainties of experimental data (solid squares) data (solid squares)
Astrophysical aspectsAstrophysical aspects
September 27 2007 JINR SC 102-nd session
Scientific program for the IREN 1-st stage
Methodical research with polarized neutrons and nucleis
s
x
y
y
z
z
H
H
I
I
k
target assemble
guidechannel
polarizer
a)
b)
x=[Ixk]
3-fold correlation, polarized nuclear target
][ kIs
5-fold correlation, aligned nuclear target
kIkIs
][
IkEpIksDpksCIsBpAf ttt
][0
Orthogonality should be better than 10Orthogonality should be better than 10-4-4
Nuclei polarization uniformityNuclei polarization uniformity Energy dependence of the false effectsEnergy dependence of the false effects
IREN 1-st stage potential:IREN 1-st stage potential:• neutron polarization vector control with precision 0.7 10neutron polarization vector control with precision 0.7 10 -3 -3 rad/dayrad/day• nuclei polarization – accuracy less than 1% per hournuclei polarization – accuracy less than 1% per hour• False effects energy dependence within 0.2 – 5 eV interval with accuracy 1%False effects energy dependence within 0.2 – 5 eV interval with accuracy 1%
September 27 2007 JINR SC 102-nd session
Tasks completed in 2006-2007
Working projects of water/power supply, fire prevention, radiation safety and other systems were finished, necessary equipment manufactured or purchased;
Until November 2007 all engineering infrastructure in accelerator building will be installed;
Until November 2007 main control room and auxiliary rooms will be repaired and ready for equipment assembling
About 70% of LUE-200 equipment was mounted on site, partly tested and certified;
Nonmultiplying target is under construction and will be ready by the end of 2007.
JINR Directorate provides financing of the project in accordance with approved time schedule and project budget.
September 27 2007 JINR SC 102-nd session
Accident with SLAC 5045 klystron – consequences & decision fork
Time schedule of the project was directed to the linac startup at the end of 2007. At present time one have to acknowledge that this goal will not be reached: in June 2007 during operation on SLAC 5045 klystron mounting it was severely damaged. It was the only klystron and we do not have possibility to replace it.
September 27 2007 JINR SC 102-nd session
Accident with SLAC 5045 klystron – consequences & decision fork
One option to start IREN 1-st stage with lower energy of electrons is to adjust spare TH2129 klystron from Linac 800 accelerator. With one accelerating section electron energy 60-70 MeV instead of 100 MeV could be reached with the same average current and increased peak current. Neutron and gamma yield will be 1.7 – 2.1 times lower.
Work on integration of integration of the TH2129 klystron is in progress. Estimated time – about 3 months.
September 27 2007 JINR SC 102-nd session
Accident with SLAC 5045 klystron – consequences & decision fork
Another option is to purchase from SLAC the klystron tube.
Negotiations with SLAC are in progress, cost of the klystron tube is k$ 350 + shipping and insurance. Delivery time – not earlier than February 2008
This cost is twice more than annual project budget and to realize this option additional financing is necessary
September 27 2007 JINR SC 102-nd session
Conclusion
The future of the project is seriously jeopardized by klystron accident;
Nevertheless, project management appeals to the Scientific Council with application to give us the chance and put IREN 1-st stage into operation starting with TH2129 klystron by the middle of 2008.