Document Type

Conference Paper

Publication Date




Publication Title

NAPAC 2019: Proceedings of the North American Particle Accelerator Conference



Conference Name

NAPAC2019: North American Particle Accelerator Conference, September 2-6, 2019, Lansing, Michigan


Magnetized bunched-beam electron cooling is a critical part of the Jefferson Lab Electron Ion Collider (JLEIC). Strong cooling of ion beams will be accomplished inside a cooling solenoid where the ions co-propagate with an electron beam generated from a source immersed in magnetic field. This contribution describes the production and characterization of magnetized electron beam using a compact 300 kV DC high voltage photogun and bialkali-antimonide photocathodes. Beam magnetization was studied using a diagnostic beamline that includes viewer screens for measuring the shearing angle of the electron beamlet passing through a narrow upstream slit. Correlated beam emittance with magnetic field at the photocathode was measured for various laser spot sizes. Measurements of photocathode lifetime were carried out at different magnetized electron beam currents up to 28 mA and high bunch charge up to 0.7 nano-Coulomb was demonstrated.


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Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) license. Any further distribution of this work must maintain attribution to the authors, the published article's title, publisher, and DOI.

Original Publication Citation

Suleiman, R., Adderley, P. A., Benesch, J. F., Bullard, D. B., Delayen, J. R., Grames, J. M., Guo, J., Hannon, F. E., Hansknecht, J., Hernandez-Garcia, C., Kazimi, R., Krafft, G. A., Mamun, M. A., Poelker, M., Tiefenback, M. G., Wang, Y. W., Wijethunga, S. A. K., Yoskowitz, J. T., & Zhang, S. (2019). Magnetized electron source for JLEIC cooler. In Y. Yamazaki, T. Raubenheimer, A. McCausey, V.R.W. Schaa (Eds.), NAPAC 2019: Proceedings of the North American Particle Accelerator Conference (pp. 83-86). JACoW.


0000-0002-0328-5828 (Krafft)