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Relative luminosity measurement of the LHC with the ATLAS forward calorimeter

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arxiv 1005.1784 v1 pith:RD47ABRP submitted 2010-05-11 physics.ins-det hep-ex

Relative luminosity measurement of the LHC with the ATLAS forward calorimeter

A. Afonin , A.V. Akimov , T. Barillari , V. Bezzubov , M. Blagov , H.M. Braun , D. Bruncko , S.V. Chekulaev
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A. Cheplakov R. Degele S.P. Denisov V. Drobin P.Eckstein V. Ershov V.N. Evdokimov J. Ferencei V. Fimushkin A. Fischer H.Futterschneider V. Garkusha A. Glatte C. Handel J. Huber N. Javadov M. Kazarinov A. Khoroshilov A.E. Kiryunin E. Kladiva M. Kobel A.A. Komar M. Komogorov A. Kozelov G. Krupny V. Kukhtin S. Kulikov L.L. Kurchaninov E. Ladygin A.B. Lazarev A. Levin W.F. Mader A.L. Maslennikov S. Menke L. Merkulov A. Neganov H. Oberlack C.J. Oram R. Othegraven S.V. Peleganchuk V. Petrov S. Pivovarov G.E. Pospelov N. Prokopenko J. Rascvetalov N.Rusakovich J.P. Rutherfoord D. Salihagic A.Y. Savine P. Schacht H. Secker F. Seifert V. Seleznev L. Shaver S. Shilov A.A. Snesarev M. Soldatov J. Spalek M. Speransky D. Stoyanova A. Straessner P. Strizenec V.V. Sulin A. Talyshev S. Tapprogge Yu.A. Tikhonov Y. Usov V. Vadeev I. Vasiliev R. Walker C. Zeitnitz
This is my paper
classification physics.ins-det hep-ex
keywords beamatlascalorimeterforwardcurrentshighintensityluminosity
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this paper it is shown that a measurement of the relative luminosity changes at the LHC may be obtained by analysing the currents drawn from the high voltage power supplies of the electromagnetic section of the forward calorimeter of the ATLAS detector. The method was verified with a reproduction of a small section of the ATLAS forward calorimeter using proton beams of known beam energies and variable intensities at the U-70 accelerator at IHEP in Protvino, Russia. The experimental setup and the data taking during a test beam run in April 2008 are described in detail. A comparison of the measured high voltage currents with reference measurements from beam intensity monitors shows a linear dependence on the beam intensity. The non-linearities are measured to be less than 0.5 % combining statistical and systematic uncertainties.

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