IUAC, New Delhi
The superconducting heavy ion LINAC at the Inter University Accelerator Centre (IUAC) has now been operational for over a year. The LINAC will augment the energy from the existing 15 UD Pelletron accelerator. It is designed to have three accelerating modules, each housing eight Niobium Quarter Wave Resonators (QWR), a superbuncher housing a single QWR and a rebuncher housing two QWR’s. Presently one accelerating module, the superbuncher and the rebuncher are operational. The other two modules are in an advanced stage of fabrication. In a recent operation several ion beams (from 12C to 107Ag) from the Pelletron were further accelerated through the first LINAC module and delivered for scheduled experiments. The energy gain from the LINAC, which was primarily dictated by the requirements of the experiment, was in the range of 2.53.5 MeV per charge state. The time widths achieved at the LINAC entrance and at the target locations were of the order of 200 and 350ps respectively. Details of the operational experience, results, problems encountered and the improvements that are being planned, will be presented.
IUAC, New Delhi
The superconducting cavity resonator fabrication facility, the first and presently the only one in India, was commissioned at the Inter-University Accelerator Centre (IUAC) in 2002. It consists of an electron beam welding machine, electropolishing laboratory, high vacuum furnace and test cryostat. In the first phase one quarter wave resonator (QWR) was fabricated and tested. In off line tests it performed at 5 MV/m at 6 W. In the second phase two more QWRs were built. In cold tests both resonators exceeded the nominal design goal and one of them performed at 4.4 MV/m at 6 W. Production of 15 QWRs for the 2nd and 3rd modules is now nearing completion. In addition, several resonators have been successfully repaired and restored. All the QWRs in the first linac module have been retrofitted with a new design of Nb-SS transition assembly. IUAC has also taken up the construction of two niobium single spoke resonators for Fermi Lab, USA. IUAC and Raja Ramanna Centre for Advanced Technology, India are jointly constructing a Tesla-type single cell cavity in niobium. This paper will present details of the facility, fabrication, test results and present status of the projects.
