2012/08/16 by Andrei Khilkevich, L. Prost, Lionel R. Prost +5 · 1 citation
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #Amplitude #Atomic physics #Dipole #Electron #Electron cooling #FOS: Physical sciences #Fermilab #Magnetic field #Nuclear physics #Optics #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics #Physics #Quantum mechanics #Superconducting Materials and Applications #Transverse plane #Wavelength #physics.acc-ph
paper · pdf · doi:10.48550/arxiv.1208.3415
published in arXiv (Cornell University) (Cornell University) · 3 pp. Particle Accelerator, 24th Conference (PAC'11) 2011. 28 Mar - 1 Apr 2011. New York, USA
arxiv created 2012/08/16 · openalex publication_date 2012/08/16 · arxiv updated 2012/08/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
In Fermilab's electron cooler, a 0.1A, 4.3MeV DC electron beam propagates through the 20 m cooling section, which is immersed in a weak longitudinal magnetic field. A proper adjustment of 200 dipole coils, installed in the cooling section for correction of the magnetic field imperfections, can create a helix-like trajectory with the wavelength of 1-10 m. The longitudinal cooling force is measured in the presence of such helixes at different wavelengths and amplitudes. The results are compared with a model calculating the cooling force as a sum of collisions with small impact parameters, where the helical nature of the coherent angle is ignored, and far collisions, where the effect of the coherent motion is neglected. A qualitative agreement is found.