Design validation of IH type drift tube resonator at IUAC

The High Current Injector (HCI) project at Inter-University Accelerator Centre would use a Radio Frequency Quadrupole (RFQ), Drift Tube Linac (DTL) and low beta superconducting cavities to accelerate heavy ions having A/q≤6, from the high temperature superconducting electron cyclotron resonance ion source (HTS-ECRIS called PKDELIS) to the existing superconducting linear accelerator (SC LINAC). The DTL has been designed to accelerate ions from 180 keV/u to 1.8 MeV/u, using six Interdigital-H (IH) type RF resonators operating at 97 MHz. The required output energy of the DTL is decided by the minimum input velocity (beta = 0.06) required for the existing superconducting LINAC. IH type resonators are the preferred choice for multiple gap DTL applications due to their high shunt impedance. Acceleration from 180 keV/u to 1.8 MeV/u would be done by six independently phased IH type RF cavities. The beam dynamics and generation of the drift tube geometry is done using the LANA code. Frequency, voltage profile measurements and high power RE test have been done on an full size prototype resonator. Complete design validation has been done on a full scale prototype resonator. Low level RF tests using bead pull technique were carried out. These tests validated the design frequency and electric field profile along the beam axis. High power RF tests have also been completed successfully. Prototype has been tested upto 6 kW input power. Frequency and temperature variation has been measured. These tests have validated the complete resonator design parameters, power coupler and efficiency of water cooling. Presently we are working on fixed and variable frequency tuner. The details of the design, fabrication and tests will be presented