Title :
Beam energy measurement using the Hall C beamline (CEBAF)
Author :
Yan, C. ; Carlini, R. ; Neuffer, D.
Author_Institution :
Continuous Electron Beam Accel. Facility, Newport News, VA, USA
Abstract :
We propose to use the curved transport line into Hall C at CEBAF to measure the beam energy. With only dipoles powered, this transport arc has a dispersion of 12 cm/%. We propose to insert pairs of wire scanners at the entrance and exit of the arc to measure beam position and direction. These measurements, together with a calibrated dipole field, obtain an absolute beam energy measurement with ~10-3 accuracy, according to error analyses. In operational mode, arc quads and sextupoles are powered to obtain a second order achromat with a dispersion of 2.1 cm/% at the arc center. A wire scanner at the arc center then obtains a relative energy measurement of ~10-4 accuracy
Keywords :
electron accelerators; linear accelerators; particle beam diagnostics; position measurement; CEBAF; Hall C beamline; beam direction; beam energy measurement; beam position; quadrupoles; sextupoles; wire scanners; Dispersion; Electron accelerators; Electron beams; Energy measurement; Error analysis; Magnetic field measurement; Magnets; Particle beams; Position measurement; Wire;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309246
