%($0&200,66,21,1*2)7+(683(5&21'8&7,1*5)462)7+( 1(:/1/,1-(&7253,$9( A. Pisent, G. Bisoffi, D. Carlucci, M. Cavenago, F. Chiurlotto, M. Comunian, E. Fagotti, A. Galatà, M. Poggi, A.M. Porcellato, M. Sattin, INFN - Laboratori Nazionali di Legnaro, Italy, T.V. Kulevoy, ITEP, Moscow, Russia $EVWUDFW PIAVE is the new injector of the LNL superconducting heavy ion linac ALPI; the injector is able to accelerate ions up to U (A/q=8.5) with a final energy of more than 1 MeV/u. During the last two months of 2004 the superconducting RFQ, composed by two Nb structures operating at 80 MHz, has been commissioned using the O 3+ and Xe 18+ beams produced by the 14.4 GHz ECRIS Alice. The beam has been accelerated up to 587 keV/u reaching the main design parameters (energy, transverse emittance, transmission) and demonstrating a stable and reproducible operation. This is the first operational beam accelerated by a superconducting RFQ. ,1752'8&7,21 The injector PIAVE (see Fig. 1) is a linear accelerator able to deliver a wide range of positive charged ions, with energy of about 1.2 MeV/u, to the superconducting accelerator ALPI in operation at LNL. Respect to the present configuration, with the superconducting linac injected by the XTU Tandem (15 MV at the terminal) the performances will be improved in terms of beam current and ion mass available (up to uranium). The main components of the injector are the ECR ion source (installed on a 350 kV platform) the LEBT (Low Energy Transport) beam line, the cryomodule housing two superconducting RFQs, the QWR linac section (two criomodules housing four cavities each) and the HEBT (High Energy Beam Transport) injecting into ALPI. The linac operates at 80 MHz, the bunching frequency is 40MHz. The source platform and the LEBT have successfully been commissioned in 2000 [1] installing a temporary measurement (TM), able to measure the transverse emittance, beam current, pulse length and beam energy, at the RFQ entrance location (about 20 cm after the nominal electrode beginning). In autumn last year the installation of the linac was completed and we commissioned the RFQ section alone by removing the first QWR cryomodule and installing the TM at its place. After two weeks of RFQ commissioning we reinstalled the QWR cryomodule and test the entire linac. In this paper we focus on the RFQ beam tests, since the test of the second part of the linac is still going on. 7+(/(%7$1'7+(6285&( Beam tests at the end of the LEBT were again performed in September 2004, so as to check the transport features before RFQ installation. Ion source beam extracted with a typical V s =11 kV voltage (total current Is≅0.5mA) is mass separated UHVROYLQJ SRZHU P P≅100) and finally accelerated by an electrostatic column up to the nominal =0.00892 for RFQ injection. For a typical 132 Xe 18+ beam we have a platform voltage V p =270 kV with a 17 Vpp ripple. Production of beams from metallic elements ( 63 Cu 11+ , 107 Ag 18+ , 120 Sn 19+ , Pr 18+ ) was recently demonstrated. For the RFQ beam commissioning two beams have been used, O 3+ and 132 Xe 18+ , requiring respectively 62% and 86% of the nominal platform and RFQ intervane voltage. TM position in commissioning phase 1 and phase 2 LEBT HEBT Figure 1: Layout of injector PIAVE. Proceedings of 2005 Particle Accelerator Conference, Knoxville, Tennessee 0-7803-8859-3/05/$20.00 c 2005 IEEE 2696