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- Superconducting cavities (4)
- Crabbing (3)
- Design (3)
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- Superconducting parallel bar cavity (3)
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- Accelerator (2)
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- Beam emittance (2)
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- Cavity (2)
- Condensed matter physics (2)
- Crab crossing (2)
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- Electromagnetic design (2)
- Electron-ion collider (2)
- Electronic structure (2)
- Geometry (2)
- Performance (2)
- Superconductivity and superfluidity (2)
- 325 MHz (1)
- 325 Mhz (1)
- Accelerating cavities (1)
- Accelerators (1)
- Acoustics (1)
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- Applications (1)
- Beam dynamics (1)
- Beam physics (1)
- Beta 0 =.82 (1)
Articles 31 - 35 of 35
Full-Text Articles in Physics
Crab Crossing Consideration For Meic, S. Ahmed, Y. Derbenev, Geoffrey A. Krafft, Y. Zhang, Subashini De Silva, Jean R. Delayen, A. Castilla
Crab Crossing Consideration For Meic, S. Ahmed, Y. Derbenev, Geoffrey A. Krafft, Y. Zhang, Subashini De Silva, Jean R. Delayen, A. Castilla
Physics Faculty Publications
Crab crossing of colliding electron and ion beams is essential for accommodating the high bunch repetition frequency in the conceptual design of MEIC – a high luminosity polarized electron-ion collider at Jefferson Lab. The scheme eliminates parasitic beam-beam interactions and avoids luminosity reduction by restoring head-on collisions at interaction points. In this paper, we report the possible crabbing schemes and requirements for both electron and proton beams.
Crab Crossing Schemes And Studies For Electron Ion Collider, S. Ahmed, Y. Derbenev, V. Morozov, A. Castilla, Geoffrey A. Krafft, B. Yunn, Subashini U. De Silva, Jean R. Delayen
Crab Crossing Schemes And Studies For Electron Ion Collider, S. Ahmed, Y. Derbenev, V. Morozov, A. Castilla, Geoffrey A. Krafft, B. Yunn, Subashini U. De Silva, Jean R. Delayen
Physics Faculty Publications
This report shows our progress in crab crossing consideration for future electron-ion collider envisioned at JLab. In this design phase, we are evaluating two crabbing schemes viz., the deflecting and dispersive. The mathematical formulations and lattice design for these schemes are discussed in this paper. Numerical simulations involving particle tracking through a realistic deflecting RF cavity and optics illustrate the desired crab tilt of 25 mrad for 1.35 MV. Evolution of beam propagation are shown which provides the physical insight of the crabbing phenomenon.
Analysis Of Hom Properties Of Superconducting Parallel-Bar Deflecting/Crabbing Cavities, Subashini De Silva, Jean R. Delayen
Analysis Of Hom Properties Of Superconducting Parallel-Bar Deflecting/Crabbing Cavities, Subashini De Silva, Jean R. Delayen
Physics Faculty Publications
The superconducting parallel-bar cavity is currently being considered for a number of deflecting and crabbing applications due to improved properties and compact design geometries. The 499 MHz deflecting cavity proposed for the Jefferson Lab 12 GeV upgrade and the 400 MHz crab cavity for the proposed LHC luminosity upgrade are two of the major applications. For high current applications the higher order modes must be damped to acceptable levels to eliminate any beam instabilities. The frequencies and R/Q of the HOMs and mode separation are evaluated and compared for different parallel-bar cavity designs.
Mechanical Study Of Superconducting Parallel-Bar Deflecting/Crabbing Cavities, Hyekyoung Park, Jean R. Delayen, Subashini De Silva
Mechanical Study Of Superconducting Parallel-Bar Deflecting/Crabbing Cavities, Hyekyoung Park, Jean R. Delayen, Subashini De Silva
Physics Faculty Publications
The superconducting parallel-bar deflecting/crabbing cavities have improved properties compared to conventional cavity structures. It is currently being considered for number of applications. The mechanical design analysis is performed on two designs of the 499 MHz parallel-bar deflecting cavity for the Jefferson Lab 12 GeV upgrade. The main purpose of the mechanical study is to examine the structural stability of the cavities under the operating conditions in the accelerators. The study results will suggest the need for additional structural strengthening. Also the study results will help to develop a concept of the tuning method. If the cavity is to be installed …
Design Of Superconducting Multi-Spoke Cavities For High Velocity Applications, C. S. Hopper, Jean R. Delayen
Design Of Superconducting Multi-Spoke Cavities For High Velocity Applications, C. S. Hopper, Jean R. Delayen
Physics Faculty Publications
Superconducting spoke cavities have been designed and tested for particle velocities up to β0 ~ 0.6 and are currently being designed for velocities up to β0 = 1. We present the electromagnetic designs for two-spoke cavities operating at 325 MHz for β0 = 0.82 and β0 = 1.