SOURCE AND LINAC3 STUDIES
DOI:
https://doi.org/10.23727/CERN-Proceedings-2017-002.113Abstract
In the framework of the LHC Ion Injector Upgrade programme (LIU), several activities have been carried out in 2016 to improve the ion source and Linac3 performance, with the goal to increase the beam current routinely delivered to LEIR. The extraction region of the GTS-LHC ion source was upgraded with enlarged vacuum chamber apertures and the addition of an einzel lens, yielding higher transmission through the rest of the machine. Also, a series of experiments have been performed to study the effects of double frequency mixing on the afterglow performance of the source after installation of a Travelling Wave Tube Amplifier (TWTA) as secondary microwave source at variable frequency. Measurements have been carried out at a dedicated oven test stand for better understanding of the ion source performance. Finally, several MD sessions were dedicated to the study and characterization of the stripping foils, after evidence of degradation in time was discovered in the 2015 run.
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2017-12-12
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