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Ignashin, N.

Cycling And Linear Accelerators

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

Particle Dynamics In Accelerators And Storage Rings, Cooling Methods, New Methods Of Acceleration

NARROW-BAND FEEDBACK SYSTEM TO DAMP TRANSVERSE COHERENT OSCILLATIONS OF BEAM IN THE U70

O. Lebedevª, S. Ivanov, N. Ignashin, S. Sytov

Institute of High Energy Physics, Protvino, Russia

Abstract

Resistive-wall transverse coherent instability shows up as a major adverse factor in running the U70 proton syn-chrotron of IHEP-Protvino. The 10th azimuthal spatial harmonic of coherent beam perturbation is the worst one prone to a strong instability. To damp this particular beam mode selectively, a dedicated narrow-band feedback cir-cuit has been developed. All of its hardware (comprising beam pickup and kicker plus analogue processing elec-tronics) is housed in one and the same straight section of the ring lattice, the feedback circuit configuration thus being the local one. Such a straightforward layout mini-mizes inherent time delays and eases closing the two feedback loops servicing horizontal and vertical direc-tions. The paper contains a brief technical specification of the damping system. Experimental results acquired during its turning on and beam-testing are outlined.

ª – corresponding author

Paper 

21