JASMIN December Counter Experiments (T-972/994) Toshiya SANAMI on behalf of JASMIN Counter team

1. JASMIN December Counter Experiments (T-972/994)Toshiya SANAMI on behalf of JASMIN Counter team JASMIN Counter team H.Arakawa, M.Hagiawara, Y.Iwamoto, T.Kajimoto, H.S.Lee, K.Saito, T.Sanami, N.Shigyo

2. Scope of JASMINcollaboration • JASMIN : Japanese American Study of Muon Interaction and Neutron detection • Experimental data for • Neutron • Generations by high energy proton (120GeV) • Interaction with matter • Muon • Interaction with nucleus • Radiation safety issue (shielding and activation), • Verification of predictions by simulations  Improvement of accelerator design All experimenter’s meeting at Fermilab

3. Approach to the data • Foil activation, chemical separation • Bonner sphere, NE213 scintillator, Dosimeter • Activation team (Dec. 13’s talk) • Pbar, NuMI and Mtest : Induced activity in concrete, iron, air and water • Counter team (Today’s talk) • NuMI : Dosimeter for muon induced radiation • Pbar : Bonner sphere for neutron spectrum • Mtest : Neutron spectrum and yield All experimenter’s meeting at Fermilab

4. Experiment at NuMI Muons Other hadrons Bypass tunnel Fermilab rock 12m 18m 30m Alcove2 Alcove3 Alcove4 Alcove1 Hadron Absorber • Muon and its secondary particles • Radiation safety issue at forward angle • Dosimeters and Bonner spheres, in comparison with predictions of simulations Bonner Sphere OSL/CR39/CR39(B) TLD IC All experimenter’s meeting at Fermilab

5. Experiment at NuMI Muons Other hadrons • Dots : dosimeters • Lines : MARS15 simulations obtained from proton on TGT Alcove3 Total dose Bypass tunnel Muon Electron Fermilab rock Neutron 12m 18m 30m Gamma Alcove2 Alcove3 Alcove4 Alcove1 Hadron Absorber Bonner Sphere OSL/CR39/CR39(B) TLD IC All experimenter’s meeting at Fermilab

6. Experiment at pbar • Shielding data for lateral direction Bonner sphere with current readout • Neutron spectrum through thick shield using Bonner spheres • Experimental data are consistent with activation, however differ from calculations All experimenter’s meeting at Fermilab

7. Experiment at FTBF • Neutron source term data • 120 GeV proton on target • Neutron energy spectrum by TOF 120GeV proton beam Target&BM1,2 5” NE213 @ 30, 90 All experimenter’s meeting at Fermilab

8. Experiment at FTBF Non-Charged particle Am-Be bias Gamma Neutron Total light output [MeVee] Slow light output [MeVee] Neutron Gamma Relative time [sec] • PSD : Neutron gamma separation • TOF : Energy determination • Normalize to number of protons Total light output [MeVee] All experimenter’s meeting at Fermilab

9. Experiment at FTBF Preliminary All experimenter’s meeting at Fermilab

10. Experiment at FTBF 30 deg. 90 deg. DDX [mb/MeV/sr] DDX [mb/MeV/sr] Energy [MeV] Energy [MeV] • Dec.2010 : more target, angles with removing room scattering effects, for systematic comparison All experimenter’s meeting at Fermilab

11. Summary • Secondary particles from 120 GeV proton have been measured from radiation safety point of view. • At NuMI, muon and secondary particle data are in good agreement with simulation • At pbar, neutron spectrum has systematic difference between experimental and simulations • To explore the reason, neutron source term have been measured at FTBF, systematically. • Thanks to • Fermilab T972/T993/T994 members, N.Mokhov, A.Leveling, D. Boehnlein, K.Vazili • MCC / pbar / NuMI / Rad. safety stuffs • FTBF members, A.Soha, E.Ramberg, R.Coleman, D.Jensen All experimenter’s meeting at Fermilab