Experiments with the two-beam funneling RFQ

Zimmermann, H.; Bechtold, A.; Firjahn-Andersch, A.; Liebermann, H.; Schempp, A.; Thibus, J.; Winschuh, E.

doi:10.1109/pac.1999.795751

Cited by 1 publication

(2 citation statements)

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“…βλ/2 at final energy) to achieve the 180° phase shift between the beam bunches of each beam line. The measured normalized 90% RMS-emittance of the two beams are equal within 6 % [4].…”

Section: Ion Sources Injection Systems and Two-beam Rfqmentioning

confidence: 69%

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Funneling with the two-beam RFQ

Zimmermann

Bechtold²,

Schempp³

et al.

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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By ion beam funneling the beam current can be multiplied without changing the emittance, which is proposed for new high current accelerator facilities like HIDIF or ESS. There the required beam current can not be produced by a single pass rf-linac. The increase in brightness in such a driver linac is done by several funneling stages at low energies, in which two identically funneling studies, are not necessary [1,2,3]. A short r.f. funneling deflector is placed at the beam crossing position behind the RFQ. The HIDIF linac starts with 16 times 3 ion sources for three different ion species to allow socalled "telescoping" at the final focus [5]. With four funneling stages the frequency has been increased from 12.5 MHz to 200 MHz accordingly [6]. bunched-ion beams are combined into a single beam with twice the frequency, current and brightness.Our funneling experiment is a setup of two ion sources, a two beam RFQ, a funnel deflector and beam diagnostic equipment to demonstrate funneling of ion beams as a model for the first hneling stage of a HIIF driver. The progress of the funneling experiment and results of simulations will be presented.

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“…βλ/2 at final energy) to achieve the 180° phase shift between the beam bunches of each beam line. The measured normalized 90% RMS-emittance of the two beams are equal within 6 % [4].…”

Section: Ion Sources Injection Systems and Two-beam Rfqmentioning

confidence: 69%

“…This operation has been tested on an emittance measurement device. The measured emittances of both ion-sources show differences up to 30% [4].…”

Section: Ion Sources Injection Systems and Two-beam Rfqmentioning

confidence: 93%