Speakers
Description
The ARGITU RFQ at ESS-Bilbao is a 352.2 MHz, 4-vane RFQ that will
accelerate protons from 45 keV to 3.0 MeV. The RFQ is a 3.1 meters long
structure machined in OHFC copper of high purity, and no brazing has
been used to assemble the vanes that conform each of the four segments.
The cooling of the structure is carried out by cooling channels that
runs longitudinally along the vane tips and transversal in the vacuum
grid region. In a first stage, the RFQ will operate at a maximum duty
cycle of 1%, and for this stage a first version of the water cooling
skid has been designed, built and tested. The vane cooling channels in
this setup runs in series from segment to segment allowing a simpler
design. A dedicated chiller that provides great stability and control
has been integrated in the system, as well as water flow and
temperature valves and sensors monitored using IO link technology.
The cooling water skid, the tests performed with the RFQ and their
correlation with FEM simulations are described in this paper. The
dynamic tuning of the RFQ during conditioning and operation are also
described.
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