Speaker
Description
A compact continuous-wave (CW) 1.3GHz linear par
ticle accelerator (linac) is currently under development as
the core component of a high energy positron annihilation
lifetime spectroscopy setup. The associated thermal load
imposes stringent requirements on the design and manu
facturing of the underlying multi-cell radio-frequency (RF)
cavity. Metal-based laser powder bed fusion (PBF-LB/M)
has recently demonstrated the capability to fabricate pure
copperRFcavitiesasmonolithiccomponentswithintegrated
complex geometries, such as cooling channels. In this work,
we present and evaluate a first 1.3GHz single-cell RF cavity
as a prototype for the intended multi-cell structure, manufac
tured from pure copper using PBF-LB/M. Helium leak rate
and low-level RF measurements meet the linac expectations.
While the dimensional accuracy is reduced compared to con
ventional manufacturing approaches, it can be compensated
by an iterative design approach. These results demonstrate,
for the first time, the feasibility of PBF-LB/M as a manufac
turing route for monolithic 1.3GHz RF cavities.
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