The positioner provides continuous adjustment of each fiber at a cost of only 10 mW per actuator. Our miniaturized actuator electronics fit in the 5-mm square cross-section beneath each fiber. There are no moving parts other than the bending of the tube, but every tube requires its own amplifiers, converters, and control logic. The positioner is mechanically simple but electrically complex. The tip of a 300-mm mast moves in a 3.8-mm square and locates the optical fiber with a precision of 10 µm rms. We bend each actuator by up to 6 mrad in two directions by applying ☒50 V to its four electrodes. At the tip of each mast is an optical fiber. We solder cylindrical, piezo-electric actuators to a rigid base, arranging them on a 5-mm grid. Our design will provide a tenfold increase in the rate of red-shift measurements for cosmological surveys. We propose a novel method for constructing a fiberscope for measuring the spectra of a large number of distant, celestial objects. With a Phase I Small Business Innovation Research (SBIR) grant from the National Science Foundation (NSF) we are building a high-density fiberscope. Willeke, "Electron ion collider conceptual design report 2021," tech. We present the design of this distributed coupling structure, as well as progress on structure manufacturing and characterization. In addition, particle tracking analysis shows that this linac maintains lower emittance as bunch charge increases to 14 nC and wakefields become more prevalent.
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This design provides greater efficiency, thereby lowering the number of klystrons required to power the full linac. A distributed coupling structure at S-band was designed to optimize for shunt impedance and large aperture size. Distributed coupling allows power to be fed into each cavity directly via a waveguide manifold, avoiding on-axis coupling.
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We propose the use of a 1 m distributed coupling design as a potential alternative and future upgrade path to this design. Currently this linac is being designed with 3 m long traveling wave structures, which provide a gradient of 16 MV/m. The Electron Ion Collider requires a pre-injector linac to accelerate large electron bunches from 4 MeV up to 400 MeV over 35 m. The Particle Physics Project Prioritization Panel (P5), a sub-panel of HEPAP, will produce a strategic report for the field later in 2022.
The Snowmass Report will provide input to the High Energy Physics Advisory Panel. The frontier conveners, along with the US High Energy Physics community, will draft a final summary document that presents the big questions facing the field and science of particle physics along with research paths forward. At the summer study the frontiers will agree on their final, individual, reports. In addition, there are Snowmass Early Career Scientists forum. Rare Processes and Precision Measurements Frontier,.The Snowmass Community Study has 10 frontiers addressing different aspects of the field. Snowmass will define the most important questions for the field of particle physics and identify promising opportunities to address them. It provides an opportunity for the entire particle physics community to come together to identify and document a scientific vision for the future of particle physics in the U.S.
“ Snowmass”) is organized by the Division of Particles and Fields of the American Physical Society. The Particle Physics Community Planning Exercise (a.k.a.
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