Bulletin of the American Physical Society
2020 NMC, NSBP, and NSHP Conference
Thursday–Saturday, February 6–8, 2020; The University of Central Florida, Orlando
Session W1D: Student Oral Presentations I |
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Chair: Erika Brown Room: SGA Boardroom |
Friday, February 7, 2020 9:00AM - 9:12AM |
W1D.00001: Bose-Einstein Condensate Dark Matter and the Scaling of Ultra Compact Dwarf (UCD) Galaxies Rajpreet Kaur Ultra Compact Dwarf (UCD) galaxies are low-mass, dense galaxies that are theorized to be composed mostly of dark matter. Fuzzy dark matter (FDM) model proposes solutions to small-structure problems of the cold dark matter model (CDM) by modelling the core of the galaxies as the single flavor axion condensate. Since a UCD is approximately the same size as the core of a galaxy and is composed highly of dark matter, we can model UCDs as the single flavor axion condensate core. Using observational data for UCDs, we could find the scaling factor for UCDs and compare it to the theoretical scaling factor of a single flavor axion condensate to further investigate the compatibility of the FDM model in explaining the small-structure problems of the CDM model. [Preview Abstract] |
Friday, February 7, 2020 9:12AM - 9:24AM |
W1D.00002: Jones Calculus Analysis of High Order Harmonic Generation in Bulk Crystal Erin Crites, Shima Gholam-Mirzaei, Troie Journigan, Zain Khan, John Beetar, Mamta Singh, Michael Chini High harmonic generation (HHG) in bulk crystals was first observed in 2011. In a transmission geometry, bulk crystals have been shown to change the polarization state of the laser due to birefringence of the crystal. This results in harmonics generated by unknown, and potentially time-dependent, elliptical polarization, rather than the preferred linear polarization. HHG in thin films has been suggested as an alternative, but thin films are not readily available in all materials. Here, we propose using Jones calculus to counteract the effects of a bulk ZnO crystal on laser polarization. We show that birefringence, rather than nonlinear effects, is the main contributor to the propagation effects. We calculate the potential configurations of a half wave plate, quarter wave plate, and ZnO that result in linear polarization at the exit of the crystal and experimentally confirm this linear polarization at different ZnO angles. We then use the corrected polarization to generate harmonics and find an ellipticity dependence of the harmonics in addition to the expected angle dependence. We compare these harmonics to a reflection geometry setup, which inherently does not have propagation effects, in order to further confirm the validity of the technique. [Preview Abstract] |
Friday, February 7, 2020 9:24AM - 9:36AM |
W1D.00003: People Like Me: Intersectional Identity Development in a Physics LA Program Xandria Quichocho, Jessica Conn, Erin Schipull, Eleanor Close Identity development is critical to student retention in physics degree programs. Historically, studies on physics identity and student retention in Physics Education Research have largely ignored the unique experiences of women of color and LGBTQ+ women. We use a blended theoretical framework of Communities of Practice and Hyater-Adams et al.’s Critical Physics Identity to analyze interviews with women of color and LGBTQ+ women in the Texas State University physics program, all of whom had experience in the Physics Learning Assistant (LA) program. When asked to describe elements supporting their success in physics, all interview subjects named the LA program. Through the narrative analysis of these interviews, we examine the effects and impact the LA program has on multiply-marginalized students. We will present data highlighting the academic and social programmatic elements of the LA program that aid in the physics identity development, physics community participation, and academic success of these students. [Preview Abstract] |
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