DEUTERON BEAM ACCELERATION AT LINAC I-100 AND IHEP BOOSTER

Yu. Antipov, N. Anferov, G. Antonichev, V. Baranov, V. Batarin, V. Bezkrovney, A. Gurevichª, V. Davydov, N. Ignashin, L. Kim, V. Kokovin, V. Komarov, O. Kurnaev, V. Lapygin, Yu. Milichenko, A. Markin, E. Nelipovich, S. Pilipenko, V. Rudko, D. Savin, T. Sinkina, V. Stolpovsky, I. Sulygin, A. Surensky, S. Sytov, V. Terekhov, V. Uglekov, V. Voevodin

Institute of High Energy Physics, Protvino, Russia

Abstract

Light ion acceleration program is being pursued in IHEP, Protvino. Light ion beams are planned to be used both for fundamental and applied research. Currently, the scope of activity extends over an ion source, the 100 MeV Alvarez linac I100, new beam transfer line from I100 to the 1.3 GeV rapid-cycled Booster proton synchrotron U1.5, beam injection system, and the U1.5 machine itself. In the first run of 2008, 3∙10¹⁰ deuterons were successfully accelerated up to 450 MeV/u and extracted to an external beam absorber. The report outlines technical milestone passed, up-to-date status of these works and experimental results achieved.

ª – corresponding author

Paper 

104

UPGRADE OF FEEDBACK LOOPS IN ACCELERATING CAVITIES OF U70

A. Markinª, V. Chubrik, S. Ivanov, O. Lebedev, I. Sulygin

Institute of High Energy Physics, Protvino, Russia

Abstract

The entire accelerating system of the U70 proton syn-chrotron of IHEP-Protvino comprises 40 identical ferrite-loaded cavities yielding 10 kV per gap max [1]. To ensure control over amplitude and phase of RF voltage across the each accelerating gap, two feedback loops per cavity are employed – for automatic voltage amplitude (shortly, AVC) and automatic resonant frequency (AFC) controls. Attaining higher intensity and better quality of beam in the U70 depends upon operational performance of the AVC and AFC circuits in question. To this end, these cru-cial sub-systems were recently renovated so as to imple-ment the up-to-date hardware and electrical-circuit solu-tions. The paper contains a brief technical specification of the thus updated feedbacks. Experience acquired during their turning on and beam-testing results are presented.

ª – corresponding author

Paper 

221