GTS meeting 6 05 17

• Yan's Abstract and Poster Outline:

1. Abstract is due by June 9, 2017
2. Poster outline. Poster presentation: June 19, 17:00-19:00.

Title

Abstract

JLEIC requires the ion beams to be cooled using co-propagating electron beams moving at the same average velocity but different temperature. The cooling rate can be improved if the process occurs inside a solenoidal field that forces the electrons to follow small helical trajectories thereby increasing the interaction time with ions and improving the cooling efficiency. The fringe field upstream of the cooling solenoid introduces very large beam rotation. To compensate for this effect the electron beam could be generated in a similar field but producing opposite rotation such that the two rotations cancel each other. The anticipated results (demonstration of high-current magnetized beam at 300kV, comparison of the K2CsSb photocathode lifetime difference between magnetized and non-magnetized beam, measurement of magnetization for a variety of charge, bunch dimensions, solenoid strength etc.) and the current status of the magnetized beam (measured results and technical challenges) will be presented.

Poster Contents:

1. Overall Beamline
2. Major components: Gun solenoid and two slits
3. Requirements of the electron beam for the JLEIC cooling
4. Some results: measurement of beam mechanical angular momentum
5. Technical challenges