Extraction of a 70-GeV/c Proton Beam
to the RAMPEX Setup by Using a Silicon Crystal

A. P. Bugorsky, A. N. Vasil’ev, V. N. Grishin, V. V. Mochalov,
A. V. Minchenko, P. A. Semenov, V. L. Solov’yanov,
A. G. Ufimtsev, M. N. Ukhanov, Yu. S. Fedotov, and Yu. V. Kharlov

Institute for High Energy Physics, State Research Center of the Russian Federation,
ul. Pobedy 1, Protvino, Moscow oblast, 142280 Russia

Received May 12, 2000

Abstract—The experimental data on the formation of a stable proton beam with a 70-GeV/c momentum extracted
from the U-70 accelerator (Protvino) to the 14th channel with a bent silicon crystal (under conditions of operation of
several setups) are presented. The beam is intended for the RAMPEX experimental facility with a polarized target.
The beam intensity, angular divergence, and spot size on the target should be at least 5 10⁶ protons per cycle, below
2.5 mrad, and no larger than 10 (horizontal) and 14 (vertical) mm, respectively. The results obtained show that the
beam is stable in the single extraction mode, but its dimensions are slightly larger than those required by the experi-
ment. An instability of the beam is observed when the beam is extracted to several experimental setups in parallel.
Further investigations are planned in order to optimize the position and parameters of the silicon single crystal.

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.