Abstract
Abstract
The coupled ladder RFQ-IH DTL structure is designed for
transportable accelerator-based neutron source to accelerate the
proton beam to 2.5 MeV with a peak current of 15 mA. The
Kombinierte Null Grad Struktur (KONUS) dynamics scheme is chosen in
the IH-DTL section to obtain compact structure, high transmission
efficiency and small emittance growth. Three KONUS periods,
including two quadrupole doublets are housed in the IH-DTL
section. The field distribution of coupled structure is studied and
the evaluation of the coupled field is quantified. The optimization
voltage ratio and electric flatness are carried out based on
three-dimension full model. In addition, the structure error
analysis is performed to evaluate the acceptance of different
errors. The tuning system is designed to compensate the machining
and alignment errors and the field tuning strategy is proposed for
the coupled cavity. The RF electromagnetic design and optimization,
structure error analysis and field tuning will be comprehensively
presented in this paper.