Utah State University DigitalCommons@USU

Presentations Materials Physics

10-26-2012

Muon Contribution to Cathodoluminescence Tests?

Justin Dekany Utah State University

Allen Andersen

JR Dennison Utah State Univesity

Follow this and additional works at: https://digitalcommons.usu.edu/mp_presentations

Part of the Physics Commons

Recommended Citation Dekany, Justin; Andersen, Allen; and Dennison, JR, "Muon Contribution to Cathodoluminescence Tests?" (2012). Fall 2012 Meeting of the Four Corner Section of the American Physical Society. Presentations. Paper 1. https://digitalcommons.usu.edu/mp_presentations/1

This Presentation is brought to you for free and open access by the Materials Physics at DigitalCommons@USU. It has been accepted for inclusion in Presentations by an authorized administrator of DigitalCommons@USU. For more information, please contact [email protected]. Fall 2012 Meeting of the Four Corner Section of the American Physical Society New Mexico Institute of Mining and Technology Socorro, NM October 26-27, 2012

Justin Dekany Physics Department Utah State University, Logan Utah U.S.A. Co-Authors Allen Andersen J.R. Dennison The chamber simulates the space environments: Pressure(<10-8 torr) Temperature (40K-340K) Electron energy (200eV-30keV) Electron flux (0.1-100 nA/cm2)

Analysis Components UV/Vis/NIR Reflectivity Spectrometers CCD Video Camera (400-900 nm) InGaAs Video Camera (800-1200 nm) InSb Video Camera (1000-5000 nm) SLR CCD Camera (300-800 nm) Fiber Optic Discrete Detectors Collection Optics

Various detectors are used to capture photon emission caused by electron bombardment “Cathodoluminescence”

Short-duration (<<1 s), High intensity luminous electrostatic discharges between the insulator and ground.

Short-duration (<<1 s), High intensity luminous electrostatic discharges between the insulator and ground.

Lower intensity, continuous surface cathodoluminescent

Lower intensity, continuous surface cathodoluminescent

1085s 1090s 1095s

1100s 1105s 1110s

Intermediate-duration (10-100 s), Intense surface emissions

1085s 1090s 1095s

1100s 1105s 1110s

Intermediate-duration (10-100 s), Intense surface emissions

Muons are the product of pion interactions with atmospheric particles Drake - Chasing a Cosmic Engine Science News July 14, 2012 *Solar Cosmic rays

*Galactic Cosmic rays

Extragalactic Cosmic rays

Cosmic ray flux vs particle energy S. Swordy, The energy spectra and anisotropies of cosmic rays, 2001, Space Science Reviews 99, pp85–94. Maximum Likelihood occurs at ~ 30 deg off Zenith

Landecker 1978 Cosmic-ray muon fluxes - PhysRevD.18.2239 Two coincident scintillator setups. Both arranged with the sample in the on axis path .