Development of a Momentum Determined Electron Beam in the 1 -45 GeV Range
V.A. Batarin, J. Butler, A.A. Derevschikov, Yu.V. Formin, V. Frolov,, V.N. Grishin, V.A. Kachanov, V.Y. Khodyrev, A.S. Konstantinov, V.I., Krasvtsov, Y. Kubota, V.M. Leontiev, V.A. Maisheev, Ya.A. Matulenko, A.P., Meschanin, Y.M. Melnick, N.G. Minaev, V.V. Mochalov, D.A. Morozov
TL;DR
This paper describes the development of a high-energy electron beam line with precise momentum measurement capabilities, suitable for testing detector materials like lead tungstate crystals for particle physics experiments.
Contribution
It presents a new beam line setup with high intensity, low contamination, and precise momentum tagging for energies up to 45 GeV at the U70 accelerator.
Findings
Achieved a momentum resolution of 0.13% at 45 GeV.
Produced electron beams with intensities up to 10^6 per spill.
Enabled detailed studies of detector materials like PbWO_4 crystals.
Abstract
A beam line for electrons with energies in the range of 1 to 45 GeV, low contamination of hadrons and muons and high intensity up to 10^6 per accelerator spill at 27 GeV was setup at U70 accelerator in Protvino, Russia. A beam tagging system based on drift chambers with 160 micron resolution was able to measure relative electron beam momentum precisely. The resolution sigma_p p was 0.13% at 45 GeV where multiple scattering is negligible. This test beam setup provided the possibility to study properties of lead tungstate crystals (PbWO_4) for the BTeV experiment at Fermilab.
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