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The Universal Linear Accelerator is a heavy ion linac based at the Heavy Ion Research Centre (GSI) near Darmstadt, Germany. It can provide beams of accelerated ions of elements from proton to Uranium with energies up to 11.4 MeV / u. The main branch consists of two ions sources terminals followed by a Radio Frequency Quadrupole (RFQ) and and by an Intergidigital linac IH linac accelerator resonating at 36 MHz up to the energy of 1.4 MeV/u. The main part then is operated by a classical linac of the Alvarez type which resonates at 108 MHz. Final energy adjustmnet can be performed in the last section which consists of a series of single gap resonators. This solutions was proposed in order to achieve the maximum flexibility in beam energy. The UNILAC is used both to send beams of heavy ions to experiments and to load the SIS18 Heavy-Ion Synchrotron (Schwer-Ionen-Synchrotron) with high-energy ions.

Collisions between heavy-ion beams and stationary targets can be made to generate superheavy transactinide elements. Experiments using beams from UNILAC have produced, in the past 20 years, elements 107 to 112.

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