/ Accelerators

Optical selection of straws for the MPD endcap tracker

Grigalashvili, N. (Dubna, JINR) ; Kekelidze, G.D. (Dubna, JINR) ; Myalkovskiy, V.V. (Dubna, JINR) ; Peshekhonov, V.D. (Dubna, JINR)

Published in: Phys.Part.Nucl.Lett.
Year: 2015
Vol.: 12    Num./Issue: 1
Page No: 113-117
Pages: 5
Year: 2015-01-07 published

Abstract: An optical method for estimating deviation from the linearity of straws with a diameter of 4 mm and a length of 60 cm mounted in the ring frames of a detector is described. The maximum permissible deviation from linearity of straws is 400 μm, and the amplitudes of signals from a$^{55}$Fe source vary along the straws by no more than 9%. The results of this optical-linearity checkup agree fairly well with the data obtained using a more accurate method (the measurement of amplitude characteristics with a$^{55}$Fe source) for determining the deviation of a straw from the anode axis.

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DOI: 10.1134/S1547477115010112