7,527 research outputs found
Recent results on PHENIX longitudinal asymmetry measurements
The spin structure of proton has been a long-standing open question for the last decades. Polarized DIS and SIDIS experiments have been the Explorer of the field and providing us the knowledge the part of substructure of the proton spin by its subcomponents. In contrast to well-measured valence quark contribution to the proton spin, polarization of gluons and sea quarks still remain with a large uncertainty. PHENIX experiment has been providing various asymmetry data to introduce new constraints to the proton spin structure, particularly gluon and sea quark polarization in proton spin using the world highest-energy polarized protonproton collider, RHIC. In this report, the latest gluon polarization measurements in PHENIX through various observables are presented. Also preliminary results
of W-boson production to measure the sea quark polarization in both central and forward rapidity are presented
Polarization Enhancement of terahertz radiation generated by intrinsic Josephson junctions in a truncated edge square Bi_{2}Sr_{2}CaCu_{2}O_{8+{\delta}} mesa
In this study, we investigated the terahertz radiation from a truncated edge
square mesa structure made from a superconducting
Bi_{2}Sr_{2}CaCu_{2}O_{8+{\delta}} . Using a commercial software, the
polarization characteristics were determined, and introduced, while accounting
for the skin effect. The axial ratio was enhanced in the simulation by
performing a parametric study on the design.Comment: Proceedings of the 28th International Symposium on Superconductivity,
ISS 2015, November 16-18, 2015, Tokyo, Japa
Grain size dependence of barchan dune dynamics
The dependence of the barchan dune dynamics on the size of the grains
involved is investigated experimentally. Downsized barchan dune slices are
observed in a narrow water flow tube. The relaxation time from an initial
symmetric triangular heap towards an asymmetric shape attractor increases with
dune mass and decreases with grain size. The dune velocity increases with grain
size. In contrast, the velocity scaling and the shape of the barchan dune is
independent of the size of the grains
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