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Persistent URL http://purl.org/net/epubs/work/33361157
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Record Id 33361157
Title Design and characterisation of the focusing solenoidal system for the CLARA high repetition rate electron source
Abstract One of the critical components of electron injectors based on RF photoelectron sources is the focusing system. The system typically consists of a Main Focusing Solenoid and a Bucking Coil. Combination of these two solenoids should provide proper focusing of the beam at the exit of the RF cavity and zero longitudinal magnetic field in the photocathode plane to minimise the beam emittance. Imperfection of the solenoid design, manufacturing and alignment frequently leads to asymmetry of the focusing field which has to be compensated with additional coils. In order to eliminate mechanical and magnetic misalignment the CLARA photoinjector solenoids are mounted on one integrated bench and before installation into the beamline have been aligned in the magnet laboratory with simultaneous measurement of the magnetic field. In order to define multipole field components, dedicated measurements of the transverse magnetic field have been done. The amplitudes of the multipoles have been obtained from analysis of the transverse field map. We present here the results of field characterisation.
Organisation ASTeC , ASTeC-AP , ASTeC-MaRS , TECH , CI , STFC
Keywords magnet measurements , magnets , electron gun , solenoid
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Language English (EN)
Type Details URI(s) Local file(s) Year
Paper In Conference Proceedings In 8th International Particle Accelerator Conference (IPAC'17), Copenhagen, Denmark, 14-19 May 2017, (2017): 4346-4348. http://accelconf.…/papers/thpik107.pdf 2017