Vacuum arc ion source for the ITEP RFQ accelerator

Abstract

A version of vacuum arc ion source has been developed and constructed at the Institute for Theoretical and Experimental Physics, Moscow, for use with a heavy ion radio frequency quadrupole linac. The source is operated in a pulsed mode with a pulse length from 5 to 120 μs and a repetition rate of from 1/8 to 1 pps. The injection voltage is up to 90 kV depending on the kind of ions being used, and the beam current at the injector output is up to 500 mA. The results described in this article were made at a beam current of from 10 to 100 mA. In order to obtain ions having a charge-to-mass ratio of about 1/60, metals such as Cu, Mo, Ta, W, and Pb were used as the cathode material. Volt-ampere characteristics and charge state distributions were measured. The charge state spectral variation was investigated throughout the arc current pulse duration as well as the dependence of the mean charge state of the beam ions on the melting point of the cathode material.

Vacuum arc ion sources

“…Vacuum arc ion sources have been used successfully at the Institute for Theoretical and Experimental Physics (ITEP), Moscow [53,54] and at the GSI heavy-ion accelerator research centre at Darmstadt, Germany, for injecting metal ions into a linear accelerator and synchrotron, including uranium. At ITEP, beams of a range of metals were formed, including Be, C, Al, Fe, Cu, Zr, and W at beam current of up to 400 mA.…”

Proton-irradiation technology for high-frequency high-current silicon welding diode manufacturing

“…Narrow straggle irradiation shows better results for both types of structures because of more local defect formation near the junction especially for Al/p + nn + -Si/nano-Ag/Mo structures that demonstrate the best electrical parameters. Nevertheless, cost-effective high volume proton treatment of bipolar device structures in vacuum needs energy efficient very reliable RFQ-accelerator similar to that described in [18] with wide treatment area up to 200x200 mm and equipped with high-performance high-volume vacuum automated chamber.…”

Vacuum arc ion sources: A review

“…Vacuum arc ion sources have been used at the Institute for Theoretical and Experimental Physics (ITEP), Moscow, [20], [21] and at the GSI heavy ion accelerator research center at Darmstadt, Germany, for accelerator injection. The GSI work has resulted in a vast improvement in both the beam noise and the beam pulse shape reproducibility [22], [23].…”