CERN’s Linac4 cesiated surface H− source
Lettry, J., Aguglia, D., Bertolo, S., Briefi, S., Butterworth, A., Coutron, Y., . . . Voulgarakis, G. (2017). CERN’s Linac4 cesiated surface H− source. In D. Faircloth (Ed.), NIBS 2016 : Fifth International Symposium on Negative Ions, Beams and Sources (pp. 030002). AIP Conference Proceedings, 1869. AIP Publishing. doi:10.1063/1.4995722
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AIP Conference Proceedings;1869Date
2017Copyright
© 2017, AIP Publishing LLC. Published in this repository with the kind permission of the publisher.
Linac4 cesiated surface H− sources are routinely operated for the commissioning of the CERN’s Linac4 and on an ion source test stand. Stable current of 40-50 mA are achieved but the transmission through the LEBT of 80% was below expectations and triggered additional beam simulation and characterization. The H− beam profile is not Gaussian and emittance measurements are larger than simulation. The status of ongoing development work is described; 36 mA H− and 20 mA D− beams were produced with a 5.5 mm aperture cesiated surface ion source. The emittances measured at the test stand are presented. During a preliminary test, the Linac4 proton source delivered a total beam intensity of 70 mA (p, H2+, H3+).