Production of highly charged ion beams with the Grenoble test electron cyclotron resonance ion source (plenary)

Abstract

Grenoble Test Source (GTS) is a room temperature electron cyclotron resonance ion source whose purpose is to deepen the knowledge of this type of device. GTS was designed according to magnetic scaling laws determined with the SERSE source [Hitz et al., Rev. Sci. Instrum. 73, 509 (2002); Gammino et al., ibid. 72, 4090 (2001)] while keeping enough flexibility in terms of magnetic confinement and rf heating to determine best conditions for the production of intense beams of any charge state. First results were presented 1 year ago [Hitz et al., 8th European Particle Accelerator Conference, 2002; 15th International Workshop on ECR Ion Sources, 2002]. Since then, some improvements have been performed mostly in the magnetic confinement, beam extraction and analysis. Updated ion beam intensities are presented: e.g., 0.5 mA of Ar11+ at 18 GHz, 20 μA of Ar16+ and 1.8 μA of Ar17+ when GTS is operated at 14.5 GHz. On the other hand, charge coupled device imagers have been installed to diagnose and monitor the ion beam and some beam images are shown.

High intensity production of high and medium charge state uranium and other heavy ion beams with VENUS

“…Recently, we have performed studies with Ar, Kr, Xe and uranium beams and the intensities achieved are summarized in Table 1. For comparison, published results from other high performance ECR ion sources are listed as reference [13,14] . The ion source performance is continuing to improve as we are coupling more power into the plasma chamber.…”

“…The ion source performance is continuing to improve as we are coupling more power into the plasma chamber. [14] SECRAL [13] f Two main magnetic confinement and heating configurations are typically used in the VENUS ECR ion source. In the single frequency heated plasma mode a minimum B field of .64 to .75 T is used, which results in a shallow magnetic field gradient at the 28 GHz resonance zone.…”

A-PHOENIX, an electron cyclotron resonance ion source for the Spiral 2 facility

“…As the best result 0.25 mA of Ar 12+ ion beam was reported at 14 GHz heating frequency, using bias disk, gas mixing technique, and special Al 2 O 3 coating. 1 In order to approach the 1 mA intensity for Ar 12+ ion beams and possibly for higher masses, the ECR ion source A-PHOENIX is under development at LPSC to better meet the Spiral 2 facility requirements for heavy ions.…”

Experimental study of the dependence of beam current on injection magnetic field in 6.4 GHz ECR ion source

“…A large number of electron cyclotron resonance (ECR) ion sources have been developed throughout the world in the last thirty years [1][2][3][4][5][6]. After the development of SUPERMAFIOS ion source by Geller [1], many modified sources have been constructed to improve the high charge state performance of the source and increase its efficiency.…”