EURISOL DS PROJECT Task#2: MULTI-MW TARGET DESIGN
Adonai Herrera-Martínez & Yacine Kadi on behalf of T2 European Organization for Nuclear Research, CERN CH-1211 Geneva 23, SWITZERLAND
[email protected]
1 EURISOL DS Progress Meeting T2-03, CEA Saclay, France
27 – 28 October, 2005
Overview 1. Baseline Parameters 2. Baseline Design (BLD) vs. Hg Jet (Hg-J) 1 Intermediate Solution (IS) 3. Comparison of the FLUKA Simulation Results – Primary Particle Flux 1 Proton Escapes – Neutron Flux and Energy Spectra – Fission Densities 1 Isotopic Yields
– Energy Deposition 1 Temperature Increase
4. Conclusions 2 EURISOL DS Progress Meeting T2-03, CEA Saclay, France
27 – 28 October, 2005
Sensitivity Study
http://eurisol-hg-target.web.cern.ch/eurisol-hg-target/ EURISOL DS Progress Meeting T2-03, CEA Saclay, France
27 – 28 October, 2005
3
Baseline Parameters of the MMW Hg Target Parameter
Symbol
Units
Nval
Range
Converter Target material
Zconv
-
Hg (liquid)
LBE
Secondary Target material
Ztarg
-
UCx, BeO
Beam particles
Zbeam
-
Proton
Deuteron
Beam particle energy
Ebeam
GeV
1
≤2
Beam current
Ibeam
mA
4
2–5
-
-
dc
ac 50Hz 1ms pulse
Gaussian beam geometry
sbeam
mm
15
≤ 25, parabolic
Beam power
Pbeam
MW
4
≤5
Converter length
lconv
cm
45
≤ 85
Converter radius (cylinder)
rconv
cm
15
8 – 20
Hg temperature
Tconv
ºC
150 (tbc)
< 357
Hg flow rate
Qconv
kg/s
200 (tbc)
< 3000
Hg speed
Vconv
m/s
2 (tbc)
< 30
bar
tbc
20 MeV), compared to ~20% in IS and ~40% in Hg-J
10 EURISOL DS Progress Meeting T2-03, CEA Saclay, France
27 – 28 October, 2005
LE Fission Density Distribution in UnatC3 LE fission density (fissions[ dominates over fission !! ➯ Three very narrow peaks corresponding to the evaporation of light nuclei such as (deuterons, tritons, 3He and α) ==> very few ➯An intermediate zone represented double humped distribution corresponding to nuclei produced by lowenergy fissions ➯ twice as much fission in radial position
Isotopic product distribution (yield/cm3/s/MW of beam)
1x1013 UnatC Radial
12
1x10
UnatC End cap
1x1011 1x1010 1x109 1x108 1x107 1x106 1x105 1x104
0
50
100
150
A, mass number
EURISOL DS Progress Meeting T2-03, CEA Saclay, France
200
250
24 27 – 28 October, 2005
Radioisotope yields in UCx targets (2)
➯ 5 times less fissions with U238 overall but… ➯ equal amount of highenergy neutron induced fissions (sym. distribution)
Isotopic product distribution (yield/cm3/s/MW of beam)
1x1013 1x10
U238C End cap
12
UnatC End cap
1x1011 1x1010 1x109 1x108 1x107 1x106 1x105 1x104
0
50
100
150
200
250
A, mass number
25 EURISOL DS Progress Meeting T2-03, CEA Saclay, France
27 – 28 October, 2005
Radioisotope yields in UCx targets (3) 1x1012
1 GeV radial 1x10
11
Isotopic product distribution (yield/cm3/s/MW of beam)
Isotopic product distribution (yield/cm3/s/MW of beam)
1x1012
2 GeV radial
1x1010 1x109 1x108 1x107 1x106 1x105 1x104
1 GeV end cap 1x1011 1x1010 1x109 1x108 1x107 1x106 1x105 1x104
0
50
100 150 A, mass number
200
250
2 GeV end cap
0
50
100
150
200
250
A, mass number
➯ harder neutron spectrum along the beam axis with 2 GeV protons ==> more high-energy neutron induced fissions and few evaporations ➯ no differences radially 26 EURISOL DS Progress Meeting T2-03, CEA Saclay, France
27 – 28 October, 2005
Radioisotope yields in BeO target
Isotopic inventory (yield/cm3/s/MW of beam)
1x1012
➯ aim for 2x1013 6He at/s
1x1011
1x1010
1x109
He-3
He-4
He-6
C-12
C-13
N-15
27 EURISOL DS Progress Meeting T2-03, CEA Saclay, France
27 – 28 October, 2005
