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@INPROCEEDINGS{Schneekloth:193126,
author = {Schneekloth, Uwe and Goerrissen, Nico},
title = {{C}alibration of {OLYMPUS}/{DORIS} beam position monitors},
reportid = {PUBDB-2014-04555},
pages = {TUPF09},
year = {2014},
note = {OA},
abstract = {The goal of the OLYMPUS experiment is a precise measurement
of the ratio of the positron-proton and electron-proton
elastic scattering cross sections in order to quantify the
effect of two-photon exchange. The experiment was performed
using intense beams of electrons and positrons stored in the
DORIS ring at Deutsches Elektronen Synchrotron in Hamburg,
impinging on an unpolarized, internal, hydrogen gas target.
An essential ingredient of the experiment is a precise
determination of the luminosity, which requires a precise
knowledge of the beam position of both beam species. During
DORIS operation cylindrical button beam position monitors,
read out by two independent electronics systems, were
mounted up- and down-stream of the target chamber. After the
end of operation, the readout systems were cross-calibrated.
The BPMs were then calibrated using a test-stand, consisting
of a wire scanner assembly. The beam was simulated by
applying an RF signal to the wire. This paper describes the
calibration principles and test setup, together with the
results compared to the expected BPM response},
month = {Jun},
date = {2014-06-30},
organization = {Hadron Structure and QCD: from Low to
High Energies, Gatchina (Russia), 30
Jun 2014 - 4 Jul 2014},
cin = {OLYMP},
cid = {I:(DE-H253)OLYMP-20120731},
pnm = {Experiments at DORIS (OLYMPUS) (POF2-515)},
pid = {G:(DE-H253)POF2-DORIS-Exp.-(OLYMPUS)-20130405},
experiment = {EXP:(DE-H253)OLYMPUS-20150101},
typ = {PUB:(DE-HGF)8},
url = {https://bib-pubdb1.desy.de/record/193126},
}