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  • Title: Design and development of a radio frequency quadrupole linac postaccelerator for the Variable Energy Cyclotron Center rare ion beam project.
    Author: Dechoudhury S, Naik V, Mondal M, Chatterjee A, Pandey HK, Mandi TK, Bandyopadhyay A, Karmakar P, Bhattacharjee S, Chouhan PS, Ali S, Srivastava SC, Chakrabarti A.
    Journal: Rev Sci Instrum; 2010 Feb; 81(2):023301. PubMed ID: 20192486.
    Abstract:
    A four-rod type heavy-ion radio frequency quadrupole (RFQ) linac has been designed, constructed, and tested for the rare ion beam (RIB) facility project at VECC. Designed for cw operation, this RFQ is the first postaccelerator in the RIB beam line. It will accelerate A/q < or = 14 heavy ions coming from the ion source to the energy of around 100 keV/u for subsequent acceleration in a number of Interdigital H-Linac. Operating at a resonance frequency of 37.83 MHz, maximum intervane voltage of around 54 kV will be needed to achieve the final energy over a vane length of 3.12 m for a power loss of 35 kW. In the first beam tests, transmission efficiency of about 90% was measured at the QQ focus after the RFQ for O(5+) beam. In this article the design of the RFQ including the effect of vane modulation on the rf characteristics and results of beam tests will be presented.
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