Title :
Performance of the new AGS RFQ preinjector
Author :
Alessi, J.G. ; Brennan, J.M. ; Brodowski, J. ; Brown, H.N. ; Kponou, A. ; LoDestro, V. ; Montemurro, P. ; Prelec, K. ; Witkover, R. ; Gough, R. ; Staples, J.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
In the fall of 1988, the 750-keV Cockcroft-Walton (C-W) preinjector for the Alternating Gradient Synchrotron (AGS) 200-MeV H- linac was replaced by an RFQ (radio-frequency quadrupole), in what has proved to be a very successful upgrade. The motivations for the upgrade included improved reliability, simpler maintenance, and the added convenience of having the ion source located at nearly ground potential. At the same time, the controls and instrumentation in the preinjector area were modernized. The linac has been operating full time with this RFQ preinjector since January 1, 1989, and the reliability has been excellent. The source, RFQ, and linac operate at a 5-Hz repetition rate, and the beam pulse width is approximately 450 μs. At this time, the H- current at 200 MeV is typically 23-25 mA, the same as previous operation with the C-W, although it will be possible to reach higher currents in the future
Keywords :
hydrogen ions; ion accelerators; linear accelerators; 200 MeV; 5 Hz; AGS RFQ preinjector; Alternating Gradient Synchrotron; H- current; H- linac; beam pulse width; radiofrequency quadrupole; upgrade; Anodes; Apertures; Educational institutions; Electrodes; Electrons; Ion sources; Laboratories; Linear particle accelerator; Maintenance; Space charge;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73327
