Speaker
Description
Soreq Applied Research Accelerator Facility (SARAF) aims to deliver up to 5 mA proton/deuteron beams at energies up to 40 MeV. SARAF is primarily a continuous wave (CW) machine, and thus, machine studies so far focused mainly on the steady state beam properties. However, the beam commissioning of the superconducting linac (scheduled to start in Q2 2026) will naturally commence with a low-duty-cycle pulsed beam in order to limit the risk of thermal damage and enable the measurements using destructive diagnostics. Furthermore, short interrupts in the beam current will always be required during operation to enable monitoring of the beam transmission using AC current transformers. Transient processes such as buildup of space charge neutralization in the LEBT and beam loading in the RFQ and cavities will influence the beam properties during the pulse formation. Understanding these processes is therefore critical for the machine commissioning and operation. In this talk, we will describe our study (supported by simulations and measurements) to identify the relevant processes, estimate their effects on the beam dynamics in the linac, and apply mitigations to minimize those effects.
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