Speakers
Description
LINAC7 is a project whose purpose is to design and fabricate a compact and low energy particle accelerator composed of two accelerating stages: an RFQ to increase the proton beam energy up to 3 MeV and an IH DTL to reach the final energy of 7 MeV. For the design of the IH DTL cavity, a cold model is developed to validate the proposed solution. For this, the following methodology and tools have been applied.
The transverse geometry of the cavity is derived analytically to ensure resonance, and the longitudinal layout is defined with 12 gaps. CST simulations are used to tune the frequency, optimize the field distribution, control surface fields, and introduce a 1.4° taper of the outer diameter of the cavity to obtain a more uniform accelerating field along the beam axis.
Beam dynamics are evaluated using RF-Track. The divergent beam exiting the RFQ is refocused in the MEBT, providing a convergent beam and a transverse size compatible with the 4 mm drift-tube aperture. The time-varying fields from CST* are imported into RF-Track to study transport and acceleration in the IH DTL. These simulations provide the basis for the design of IH DTL, the evolution of the cold model and the future cavity in charge of accelerating the beam up to 7 MeV.
The optimized geometry is then used for the mechanical design, and the cold model is under fabrication will be validated by low power RF measurements.
Funding Agency
Funded by the Basque Government under the Science Industry Strategy, ELKARTEK program.
Footnotes
Dassault Systèmes, “CST Studio Suite,” SIMULIA
*A. Latina, “RF-Track Reference Manual Version 2.5.4,” CERN
| Paper status | No proceeding expected for this contribution. |
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