Würzburg 2018 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 8: Poster session

AKBP 8.2: Poster

Mittwoch, 21. März 2018, 18:00–19:30, NW-Bau - HS2

Manufacturing & Measurements of the 325 MHz Ladder RFQ — •Max Schuett, Marc Syha, and Ulrich Ratzinger — IAP, Goethe University Frankfurt

Based on the positive results of the unmodulated 325 MHz Ladder-RFQ prototype from 2013 to 2016, we developed and designed a modulated 3.3 m Ladder-RFQ*. The unmodulated Ladder-RFQ features a very constant voltage along the axis. It accepted 3 times the operating power of which is needed in operation**. That level corresponds to a Kilpatrick factor of 3.1 with a pulse length of 200 µs.

The 325 MHz RFQ is designed to accelerate protons from 95 keV to 3.0 MeV according to the design parameters of the proton linac within the FAIR project. This particular high frequency creates difficulties for a 4-ROD type RFQ, which triggered the development of a Ladder RFQ with its high symmetry. The results of the unmodulated prototype have shown, that the Ladder-RFQ is a suitable candidate for that frequency. The duty cycle is suitable up to 5%.

The basic design and tendering of the RFQ has been successfully completed in 2016. Manufacturing will be completed in early 2018. We will show the results of manufacturing as well as first low level RF measurements on field flatness and frequency spectra compared in comparison to simulations.

*Journal of Physics: Conf. Series 874 (2017) 012048

**Proceedings of LINAC2016, East Lansing, TUPLR053

Supported by BMBF 05P15RFRBA