Impurity Analysis Using a New High-Sensitivity UHPLC Detector
Efficiency and Sensitivity for the HALO Detector
-
Upload
colt-davidson -
Category
Documents
-
view
36 -
download
4
description
Transcript of Efficiency and Sensitivity for the HALO Detector
![Page 1: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/1.jpg)
EFFICIENCY AND SENSITIVITY FOR THE HALO
DETECTORCara Esposito
Saint Joseph’s UniversityDr. Kate Scholberg
Duke University
![Page 2: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/2.jpg)
Outline
Brief background on neutrinos, supernovae, and the HALO detector
Efficiency and the important information gained from examining the efficiency
Sensitivity for HALO Summary
![Page 3: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/3.jpg)
Background
•The Equation above is for the probability of detecting flavor g at L for a two flavor case.•Although there are three flavors, the Δm2 remains•Normal Mass Hierarchy (NMH) has one heavy and two light mass states, while IMH has two heavy and one light mass state
![Page 4: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/4.jpg)
Background
Supernovae happen when a massive star can no longer sustain itself and it explodes
99% of the energy of core collapse supernovae is neutrinos
Before After
![Page 5: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/5.jpg)
Background
SNOLab in Canada 79 tons of lead 128 helium
detectors 2 km underground HALO 2 is currently
in the developing phase and will most likely use 1 kiloton of lead
Helium Detectors
Lead
![Page 6: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/6.jpg)
Background
Visualization of the simulation using Geant4
![Page 7: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/7.jpg)
How HALO Works
___ ___
___ ___
ν
![Page 8: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/8.jpg)
How HALO Works
___ ___
___ ___
ν
![Page 9: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/9.jpg)
How HALO Works
___ ___
___ ___
ν
![Page 10: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/10.jpg)
How HALO Works
___ ___
___ ___
ν
![Page 11: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/11.jpg)
How HALO Works
___ ___
___ ___
ν
n
1n
![Page 12: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/12.jpg)
How HALO Works
___ ___
___ ___
ν
n
1n
![Page 13: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/13.jpg)
How HALO Works
___ ___
___ ___
ν
n
1n
n
![Page 14: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/14.jpg)
How HALO Works
___ ___
___ ___
ν
n
1n
n
![Page 15: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/15.jpg)
Flux
The left panel is for inverted mass hierarchy
The right panel is for normal mass hierarchy
![Page 16: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/16.jpg)
Energy Spectrum
From the energy deposited in the detector we can determine whether it’s a 1N or a 2N event.
![Page 17: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/17.jpg)
Energy Spectrum
From the energy deposited in the detector we can determine whether it’s a 1N or a 2N event.
1N 2n
![Page 18: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/18.jpg)
Efficiency
•Tells us how well the detector works
![Page 19: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/19.jpg)
Sensitivity
HALO 1’s sensitivity for 5kpc supernovae
Contours in which ninety percent of the number of one-neutron and two-neutron events fall
The different colored curves correspond to different spectral parameters
![Page 20: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/20.jpg)
Sensitivity
For 10 kpc supernovae HALO 1 can only constrain extreme models
![Page 21: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/21.jpg)
Sensitivity
HALO 2 ‘s discriminatory power will increase with a greater number of counts for 10 kpc supernovae.
![Page 22: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/22.jpg)
Summary
Simulated neutron events in the HALO Geant4 simulator
Efficiency for 1N events is approximately 36%
Efficiency for 2N events is approximately 56%
HALO 1 has good sensitivity for 5 kpc supernovae, but can only constrain extreme models for 10 kpc supernovae
HALO 2 the larger the number of counts, the greater the yield for the discriminatory power
![Page 23: Efficiency and Sensitivity for the HALO Detector](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681342d550346895d9b1b5c/html5/thumbnails/23.jpg)
Acknowledgements
K.Scholberg, C.Walter, A.Himmel, Duke University High Energy Physics Neutrino Group
Triangle Universities Nuclear Laboratory's Research Experience for Undergraduates
Halo Collaboration/SNOLab