Understanding Neutrons in Artie and Dune: Research and Developments in Argon Transparency

1. Dune & ARTIE:Argon transparency to neutrons Leonardo oliveira                                              LIP 4-set-2019                                              Dr. Sofia andringa

2. Fig. 1: Illustration of DUNE setup 2

3. Liquid-Argon Time Projection Chambers Fig. 2: Modified illustration of DUNE setup 3

4. Liquid-argon time projection chamber Fig. 4: CERN scientist inside the unfinished ProtoDUNE LArTPC Fig. 3: Animation of LArTPC mechanism 4

5. Pulsed neutron source calibration Fig. 5: Illustration of PNS calibration mechanism 5

6. Scattering length Fig. 6: Total cross section data for ⁴⁰Ar 6

7. Artie Fig. 7: Close-up illustration of ARTIE setup 7

8. Artie 1.6 m 30 m 30 m 1 m 1 m Fig. 8: Full illustration of ARTIE setup 7

9. Project outline

10. results Fig. 10: Close-up illustration of ARTIE setup Fig. 9.1: Energy distribution

11. results Fig. 10: Close-up illustration of ARTIE setup Fig. 9.2: Energy distribution

12. results Fig. 10: Close-up illustration of ARTIE setup Fig. 9.2: Energy distribution

13. results Fig. 10: Close-up illustration of ARTIE setup Fig. 9.3: Energy distribution

14. results Fig. 10: Close-up illustration of ARTIE setup Fig. 9.4: Energy distribution

15. results Fig. 11: Plot of gamma emission, z-coordinate Fig. 12: Plot of gamma emission, initial energy of neutron

16. Results Fig. 13: Initial Energy profile for counter hits Fig. 14: Total cross section data for ⁴⁰Ar

17. Results Fig. 16: Time signal for counter hits, with uniform random 150ns noise Fig. 15: Initial Energy – Time profile for counter hits

18. Results Fig. 17: Energy reconstruction from Time signal Fig. 18: Relative error in E(T)

19. Conclusions Fig. 19: Total cross section data for ⁴⁰Ar 6

20. Thank You! Questions?