COMMISSIONING OF THE FERMILAB ELECTRON COOLER PROTOTYPE BEAM LINE

Abstract A prototype of a 4.3-MeV electron cooling system is being assembled at Fermilab as part of the ongoing R&D program in high energy electron cooling. This electron cooler prototype will not demonstrate the actual cooling but it will allow determining if the electron beam properties are suitable for antiproton beam cooling. An electron beam is accelerated by a 5-MV Pelletron (Van de Graaff type) accelerator and transported to a prototype cooling section. The cooling will take place in a 20-m long solenoid flanked on both sides by a delivery and return beam-line -a total of 60 meters of transport channel. This paper describes the first results of commissioning this novel beam line as well as the status of the electron cooling R&D program

Measurements Of Magnet Vibrations At The Advanced Photon Source

This article presents results of ground motion and magnet vibrations measurements at the Advanced Photon Source. The experiments were done over a frequency range of 0.1 -- 100 Hz. Spectral power densities of vertical and horizontal motions of the APS hall floor and quadrupoles on regular supports were obtained. Magnet vibrations induced by designed cooling water flow and spectral characteristics of spatial correlation of the quadrupole vibrations at different sectors of the ring were also investigated. Amplitudes of the measured vibrations are compared with quad jitter tolerances in the APS. I. Introduction The Advanced Photon Source (APS) is a synchrotron radiation facility under construction at Argonne National Laboratory. It is based on 1.1-kilometer-circumference 7-GeV positron storage ring [1]. To obtain high brilliance X-ray radiation of the positron beam from dipole magnets and insertion devices at each of 40 sectors of the ring, the transverse beam sizes and angle divergencie..