Contribution to a conference proceedings/Contribution to a book

GSI-2023-01082

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Design and Beam Dynamics of the Electron Lens for Space Charge Compensation in SIS18

Artikova, S. (Corresponding author)GSI* ; Ondreka, D.GSI* ; Schulte-Urlichs, K.GSI* ; Spiller, P.GSI*

2021
JACoW Publishing, Geneva, Switzerland

Please use a persistent id in citations: doi:10.18429/JACOW-IPAC2021-WEPAB384  doi:10.15120/GSI-2023-01082

Abstract: An electron lens for space charge compensation is being developed at GSI to increase the ion beam intensities in SIS18 for the FAIR project. It uses an electron beam of 10A maximum current at 30keV. The maximum magnetic field on-axis is 0.6T, considerably higher than the field of the existing electron cooler. The magnetic system of the lens consists of solenoids and toroids. The toroids’ vertical field component creates a significant horizontal orbit deflection in the circulating low rigidity ion beam. To correct this deflection, four correction dipoles have been introduced. As common for electron lenses, the high-power electron beam is not dumped at ground potential, but rather in a collector with a small bias potential with respect to the cathode. The present design foresees a collector at -27kV, leading to a power dissipation of 30kW, distributed over a large surface area by placing the collector in an appropriately shaped magnetic field of a pre-collector solenoid. This contribution reports on the design of the lens and presents the results of beam transport simulations for the electron beam (with space charge) and a representative ion beam, performed using the 3D CST STUDIO.

Keyword(s): Accelerator Physics ; MC7: Accelerator Technology

Note: Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license

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Contributing Institute(s):

1. System Design SIS 100 / SIS 18 (SYS)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. External experiment at external facility/ no experiment at GSI (other)

Appears in the scientific report 2023

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