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Full-Text Articles in Physics
Developing Process Variables Necessary To Operate Simulacrum: The Lcls Accelerator Simulator, Mirian G. Juan Estrella
Developing Process Variables Necessary To Operate Simulacrum: The Lcls Accelerator Simulator, Mirian G. Juan Estrella
STAR Program Research Presentations
The Linac Coherent Light Source (LCLS) is a free electron laser that is located at SLAC National Accelerator Laboratory. It fires 120 pulses per second, creating x-ray snapshots of materials at the atomic and molecular level as it undergoes any changes or processes. This resulted in many scientific discoveries in chemistry, biology, energy science, and technology. Now, there is a new vision at SLAC regarding LCLS: to develop Simulacrum. Simulacrum is a system that simulates LCLS and its control system. Within Simulacrum there exits services that contain process variables that measure specific parts of a device on LCLS, which communicate …
Measuring Length Of Electron Bunches With Optics In Lcls-Ii, Nathan Ahn, Alan Fisher
Measuring Length Of Electron Bunches With Optics In Lcls-Ii, Nathan Ahn, Alan Fisher
STAR Program Research Presentations
Since the launch of the LINAC Coherent Light Source (LCLS) in 2009, there have been over 1,000 publications enabling pioneering research across multiple fields. Advances include: harnessing the sun’s light, revealing life’s secrets and aiding drug development, developing future electronics, designing new materials and exploring fusion, customizing chemical reactions, and many more. These discoveries gathered worldwide attention, and now work has begun on a new revolutionary tool, LCLS-II. The LCLS-II will pulse at a million times a second, compared to the 120 pulses from the LCLS. Within the LCLS-II, there are two chicanes, serpentine curves. As the electron beam passes …
Pnnl Dark Matter Bubble Chamber Simulation, Carl M. Krutz
Pnnl Dark Matter Bubble Chamber Simulation, Carl M. Krutz
STAR Program Research Presentations
Based on observations of interactions between objects on a cosmic scale, scientists have determined that a large percentage (85%) of the universe’s mass is not visible. Weakly Interacting Massive Particles (WIMPs) are one of the primary candidates for this dark matter. Many current projects seek to find WIMPs through various search methods. The PICO dark matter experiment involves observing an underground chamber at SNOLAB for bubbles created when energy in the form of radiation is deposited in a superheated liquid. The group at Pacific Northwest National Lab (PNNL) working on the PICO project seeks to develop improvements to the project’s …
Low Cost Timing System For High Precision Particle Detection, Eric Madrigal, Sasha Dolgashev, Vi Tran
Low Cost Timing System For High Precision Particle Detection, Eric Madrigal, Sasha Dolgashev, Vi Tran
STAR Program Research Presentations
The project goal was to find a way to make a low-cost high precision timing system. High precision timing systems are already on the market, however, at a high cost. Various particle research projects need a large number of timers, so a substantial budget is required. In order to bypass the need for a large enough budget, commercially available parts were used and tested. The timing system consisted of multiple parts with different low-cost microchips and counters. In order for the project to meet its goal, the timers need to work under 50 picoseconds. Although some tests showed the timers …
Ultra-Fast X-Ray Diffraction Of Metastable Structures During Hydrogen Crystallization, Andrew Pham
Ultra-Fast X-Ray Diffraction Of Metastable Structures During Hydrogen Crystallization, Andrew Pham
STAR Program Research Presentations
Big discoveries can come from small element, and hydrogen is the simplest element in the universe, but its property has been intensely studied in recent years. Hydrogen has a notably complex phase diagram, and its application is important to many scientific fields, such as fundamental physics, inertial confinement fusion, planetary sciences, etc. While sophisticated static observations have probed its structure at extremely high pressures, the higher-temperature studies applying dynamic compression is confined to optical measurement methods. In this project over the summer, I will present spectrally resolved x-ray scattering assessment from plasmons in dynamic compressed deuterium. Collaborating Compton scattering and …
Memory In A Contact Line, Charity Lizardo, Esmeralda Orozco, Audrey Profeta, Nathan C. Keim
Memory In A Contact Line, Charity Lizardo, Esmeralda Orozco, Audrey Profeta, Nathan C. Keim
STAR Program Research Presentations
We study the behavior of the liquid-solid-vapor contact line of water held in a narrow gap between two plates. A syringe pump injects and withdraws a constant, small volume of the water, driving the contact line back and forth repeatedly and changing its shape. We take photos of the contact line after each cycle. Comparing subsequent images to each other, we find that after several cycles the contact line reaches one of two steady states: a reversible steady state, where the shape is not changing, or a fluctuating steady state, where the shape continues to change slightly. Experiments on acrylic …