AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Advanced light source beam time3/8/2024 ![]() APS research played a role in the development of the COVID-19 vaccines in use in the United States. Scientists use the X-rays generated by the APS to peer inside batteries, with the goal of creating longer-lasting, faster-charging energy storage devices to improve 3D printing for more durable materials to learn more about the behavior of charged particles in order to improve electronics and to map the brain to understand more about neurological diseases. Scientists at 65 experiment stations around the ring use these X-rays for basic and applied research in a number of fields. At every bend in the track, these electrons emit synchrotron radiation in the form of ultrabright X-rays. ![]() The APS uses a series of particle accelerators to push electrons up to nearly the speed of light, and then injects them into a storage ring that is roughly two-thirds of a mile around. How APS works Inside the APS Storage Ring Enclosure It is operated as a user facility, meaning that it is open to the world’s scientific community, and more than 5,500 researchers make use of its resources each year. The APS began operation on March 26, 1995. It is one of five X-ray light sources owned and funded by the U.S. The successful beam size measurement by optical diffraction radiation at CEBAF machine is a milestone: First of all, we have successfully demonstrated diffraction radiation as an effective nonintercepting diagnostics Secondly, the simple linear relationship between the diffraction radiation image size and the actual beam size improves the reliability of ODR measurements And, we measured the polarized components of diffraction radiation for the first time and I analyzed the contribution from edge radiation to diffraction radiation.The Advanced Photon Source ( APS) at Argonne National Laboratory (in Lemont, Illinois) is a storage-ring-based high-energy X-ray light source facility. Even though the theory of diffraction radiation has been discussed since 1960s, there are only a few experimental studies in recent years. Diffraction radiation, produced by the interaction between the electric field of charged particles and the target, is related to transition radiation. This thesis is divided into two parts, beam size measurement by optical diffraction radiation and Laser system for Compton polarimeter. Diffraction radiation and inverse Compton scattering are two of the most promising techniques, their nonintercepting nature avoids perturbance to the beam and damage to the instrumentation. The development of accelerator technology asks for simutanous diagnostics innovations, to expand the performance of diagnostic tools to meet the requirements of the next generation accelerators. For most cases, intercepting measurements are no longer acceptable, and nonintercepting method like synchrotron radiation monitor can not be applied to linear accelerators. Higher performance of these accelerators increases the difficulty of diagnostics. Furthermore, some special positions in the accelerator have even more stringent requirements, such as the interaction point of colliders and wigglor of free electron lasers. Compared with those existing linear accelerators, the performance of next generation linear accelerator will be doubled in all aspects, such as 10 times smaller horizontal beam size, more than 10 times smaller vertical beam size and a few or more times higher peak power. These machines require a new generation of accelerator with smaller beam, better stability and greater efficiency. In the next two decades, the research highlight will be colliders (TESLA, CLIC, JLC) and fourth-generation light sources (TESLA FEL, LCLS, Spring 8 FEL) based on linear accelerator. Diagnostics let us perceive what properties a beam has and how it behaves in a machine, give us guideline for commissioning, controlling the machine and indispensable parameters vital to physics experiments. Some devices are based on electro-magnetic influence by moving charges, such as faraday cups, beam transformers, pick-ups Some are related to Coulomb interaction of charged particles with matter, such as scintillators, viewing screens, ionization chambers Nuclear or elementary particle physics interactions happen in some other devices, like beam loss monitors, polarimeters, luminosity monitors Some measure more » photons emitted by moving charges, such as transition radiation, synchrotron radiation monitors and diffraction radiation-which is the topic of the first part of this thesis Also, some make use of interaction of particles with photons, such as laser wire and Compton polarimeters-which is the second part of my thesis. A great variety of physical effects or physical principles are made use of in this field. = ,īeam diagnostics is an essential constituent of any accelerator, so that it is named as "organs of sense" or "eyes of the accelerator." Beam diagnostics is a rich field.
0 Comments
Read More
Leave a Reply. |