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JASMIN (T972) pbar Experiments Concrete Cap(CC), Air Gap(AG), Target(TG),

JASMIN (T972) pbar Experiments Concrete Cap(CC), Air Gap(AG), Target(TG), Filler Plate (FP), Duct Streaming (ST), and Gas Experiment (GE). Purpose. To obtain experimental data for neutrons generated by high energy proton Interaction in matter ( E p >100 GeV ).

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JASMIN (T972) pbar Experiments Concrete Cap(CC), Air Gap(AG), Target(TG),

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  1. JASMIN (T972) pbar Experiments Concrete Cap(CC), Air Gap(AG), Target(TG), Filler Plate (FP), Duct Streaming (ST), and Gas Experiment (GE) Purpose • To obtain experimental data for neutrons • generated by high energy proton Interaction in matter (Ep>100 GeV) • Nuclear reaction mechanism • Simulation code test • Radiation shielding and activation

  2. Experiment at AP0 • Neutron spectra and position distribution • Foil activation method • Samples: Aluminum, Copper, Bismuth, etc. • Position: AG, CC(2007,2008) FP, TG, ST(2008) CC AG FP TG Cross Sectional View of AP0 ST

  3. Duct Streaming Filler Plate Air gap

  4. Target samples Target with Be cover

  5. Sample installation/retrieval schedule • All pbar samples installed during SD w/b 10/6/08 • Samples retrieved: • Concrete Cap 10/14/08 • Air gap 10/15/08 • Target 10/17/08 (required 4 hr cooldown & 4 hr access) • Filler plate 10/17/08 • Duct streaming 10/17/08 • Remaining air gap samples (10/25/08) • Gas experiment samples are collected during stacking operations (ongoing)

  6. Results(CC and AG) for 2007 exp. Spatial distribution measurement of reaction rate of activation samples CC03 CC04 CC02 CC03 CC04 CC02 CC01 CC01 AG04 AG05 AG03 AG02 AG03 AG04 AG05 AG01 AG02 AG01

  7. Expt. PHITS MARS MCNPX Expt. PHITS MARS MCNPX Expt. PHITS MARS MCNPX Calculation Results (AG) Reaction Cross Section Data 27Al (n, a) 24Na 206Bi(n,4n) 115In(n,n’) 206Bi(n,6n) 27Al(n,a) 209Bi (n, 4n) 206Bi 209Bi (n, 6n) 204Bi 3

  8. Objective 1. To compare radioactivity in target vault air under the different target configuration 2. To look at sorbability onto particulate material. Pbar gas experiment Paper Filter Teflon Filter Alkali Filter Charcoal Filter Experimental Procedure 1. Collecting gas component using filter stack. 2. Gamma spectrometry. Pump concrete Target configuration year of 2007 the target has NO Be shell year of 2008 the target has Be shell iron target vault

  9. Result 7Be 24Na Spallation products with NO Be shell (2007) count / s / 0.5 keV with Be shell (2008) Energy (keV) • No spallation products could be observed using the Be shell. • Be-7 and Na-24 could be produced from air. So, the 2 nuclides • were observed regardless of Be shell.

  10. Supplemental material

  11. Results(Au sample on AG) for 2007 exp. Mass distribution of the products Au-196 (8.1 MeV) Ir-189 (55.7 MeV) Pt-188 (65.2 MeV) Os-185 (82.9 MeV) Re-183 (95.2 MeV) Hf-175 (147.3 MeV) Lu-173 (164.1 MeV) Lu-171 (180.1 MeV) Yb-169 (189.7 MeV)

  12. Results(Au sample on AG) for 2007 exp. Comparison between Exp. & Cal. Yield (PHITS) 120GeV = N(En) x σ(Ep) dE 0 calculated (neutron) experimental (proton)

  13. Calculation Analysis Simplified Geometry Real Geometry 2-dimension （R-Z） Simplified Calculation Geometry (Unit: cm) Target (Unit: cm) 2 2

  14. Expt. PHITS Expt. PHITS Expt. PHITS Expt. PHITS MARS MCNPX MARS MCNPX MARS MCNPX MARS MCNPX Calculation Results (CC) 27Al (n, a) 24Na 115In (n, n’)115mIn 209Bi (n, 4n) 206Bi 209Bi (n, 6n) 204Bi 4

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