001265045 001__ 1265045
001265045 003__ SzGeCERN
001265045 005__ 20211013073230.0
001265045 0247_ $$2DOI$$a10.1088/1748-0221/5/05/P05005
001265045 0248_ $$aoai:cds.cern.ch:1265045$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
001265045 035__ $$9arXiv$$aoai:arXiv.org:1005.1784
001265045 035__ $$9Inspire$$a854780
001265045 037__ $$9arXiv$$aarXiv:1005.1784$$cphysics.ins-det
001265045 037__ $$a0036327
001265045 041__ $$aeng
001265045 100__ $$aAfonin, A.$$uSerpukhov, IHEP
001265045 245__ $$aRelative luminosity measurement of the LHC with the ATLAS forward calorimeter
001265045 246__ $$9arXiv$$aRelative luminosity measurement of the LHC with the ATLAS forward calorimeter
001265045 260__ $$c2010
001265045 269__ $$c12 May 2010
001265045 300__ $$a15 p
001265045 500__ $$aComments: 16 pages
001265045 500__ $$9arXiv$$a16 pages
001265045 520__ $$aIn this paper it is shown that a measurement of the relative luminosity changes at the LHC may be obtained by analysing the currents drawn from the high voltage power supplies of the electromagnetic section of the forward calorimeter of the ATLAS detector. The method was verified with a reproduction of a small section of the ATLAS forward calorimeter using proton beams of known beam energies and variable intensities at the U-70 accelerator at IHEP in Protvino, Russia. The experimental setup and the data taking during a test beam run in April 2008 are described in detail. A comparison of the measured high voltage currents with reference measurements from beam intensity monitors shows a linear dependence on the beam intensity. The non-linearities are measured to be less than 0.5 % combining statistical and systematic uncertainties.
001265045 520__ $$9arXiv$$aIn this paper it is shown that a measurement of the relative luminosity changes at the LHC may be obtained by analysing the currents drawn from the high voltage power supplies of the electromagnetic section of the forward calorimeter of the ATLAS detector. The method was verified with a reproduction of a small section of the ATLAS forward calorimeter using proton beams of known beam energies and variable intensities at the U-70 accelerator at IHEP in Protvino, Russia. The experimental setup and the data taking during a test beam run in April 2008 are described in detail. A comparison of the measured high voltage currents with reference measurements from beam intensity monitors shows a linear dependence on the beam intensity. The non-linearities are measured to be less than 0.5 % combining statistical and systematic uncertainties.
001265045 540__ $$aOpen Access
001265045 595__ $$aCDS
001265045 595__ $$aLANL EDS
001265045 65017 $$2arXiv$$aDetectors and Experimental Techniques
001265045 65027 $$2arXiv$$aParticle Physics - Experiment
001265045 690C_ $$aARTICLE
001265045 690C_ $$aCERN
001265045 693__ $$aCERN LHC$$eATLAS
001265045 695__ $$9LANL EDS$$aphysics.ins-det
001265045 695__ $$9LANL EDS$$ahep-ex
001265045 700__ $$aAkimov, A.V.$$iINSPIRE-00210520$$uLebedev Inst.
001265045 700__ $$aBarillari, T.$$iINSPIRE-00064533$$uMunich, Max Planck Inst.
001265045 700__ $$aBezzubov, V.$$uSerpukhov, IHEP
001265045 700__ $$aBlagov, M.$$uLebedev Inst.
001265045 700__ $$aBraun, H.M.$$iINSPIRE-00069076$$uWuppertal U.
001265045 700__ $$aBruncko, D.$$iINSPIRE-00179454$$uKosice, IEF
001265045 700__ $$aChekulaev, S.V.$$iINSPIRE-00212450$$uTRIUMF
001265045 700__ $$aCheplakov, A.$$iINSPIRE-00001054$$uDubna, JINR
001265045 700__ $$aDegele, R.$$uMainz U.
001265045 700__ $$aDenisov, S.P.$$iINSPIRE-00076710$$uSerpukhov, IHEP
001265045 700__ $$aDrobin, V.$$uDubna, JINR
001265045 700__ $$aEckstein, P.$$uDresden, Tech. U.
001265045 700__ $$aErshov, V.$$uDubna, JINR
001265045 700__ $$aEvdokimov, V.N.$$iINSPIRE-00300342$$uSerpukhov, IHEP
001265045 700__ $$aFerencei, J.$$iINSPIRE-00185039$$uKosice, IEF
001265045 700__ $$aFimushkin, V.$$uDubna, JINR
001265045 700__ $$aFischer, A.$$uMunich, Max Planck Inst.
001265045 700__ $$aFutterschneider, H.$$uDresden, Tech. U.
001265045 700__ $$aGarkusha, V.$$uSerpukhov, IHEP
001265045 700__ $$aGlatte, A.$$uDresden, Tech. U.
001265045 700__ $$aHandel, C.$$iINSPIRE-00215362$$uMainz U.
001265045 700__ $$aHuber, J.$$uMunich, Max Planck Inst.
001265045 700__ $$aJavadov, N.$$uDubna, JINR
001265045 700__ $$aKazarinov, M.$$iINSPIRE-00216551$$uDubna, JINR
001265045 700__ $$aKhoroshilov, A.$$iINSPIRE-00236672$$uNovosibirsk, IYF
001265045 700__ $$aKiryunin, A.E.$$iINSPIRE-00216808$$uMunich, Max Planck Inst.
001265045 700__ $$aKladiva, E.$$iINSPIRE-00216810$$uKosice, IEF
001265045 700__ $$aKobel, M.$$iINSPIRE-00097070$$uDresden, Tech. U.
001265045 700__ $$aKomar, A.A.$$iINSPIRE-00218307$$uLebedev Inst.
001265045 700__ $$aKomogorov, M.$$uDubna, JINR
001265045 700__ $$aKozelov, A.$$uSerpukhov, IHEP
001265045 700__ $$aKrupny, G.$$uSerpukhov, IHEP
001265045 700__ $$aKukhtin, V.$$iINSPIRE-00218599$$uDubna, JINR
001265045 700__ $$aKulikov, S.$$uSerpukhov, IHEP
001265045 700__ $$aKurchaninov, L.L.$$uTRIUMF
001265045 700__ $$aLadygin, E.$$iINSPIRE-00099592$$uDubna, JINR
001265045 700__ $$aLazarev, A.B.$$iINSPIRE-00218885$$uDubna, JINR
001265045 700__ $$aLevin, A.$$uSerpukhov, IHEP
001265045 700__ $$aMader, W.F.$$iINSPIRE-00103627$$uDresden, Tech. U.
001265045 700__ $$aMaslennikov, A.L.$$iINSPIRE-00220055$$uNovosibirsk, IYF
001265045 700__ $$aMenke, S.$$iINSPIRE-00106910$$uMunich, Max Planck Inst.
001265045 700__ $$aMerkulov, L.$$uDubna, JINR
001265045 700__ $$aNeganov, A.$$uDubna, JINR
001265045 700__ $$aOberlack, H.$$iINSPIRE-00112415$$uMunich, Max Planck Inst.
001265045 700__ $$aOram, C.J.$$iINSPIRE-00113272$$uTRIUMF
001265045 700__ $$aOthegraven, R.$$uMainz U.
001265045 700__ $$aPeleganchuk, S.V.$$iINSPIRE-00221714$$uNovosibirsk, IYF
001265045 700__ $$aPetrov, V.$$uDubna, JINR
001265045 700__ $$aPivovarov, S.$$uNovosibirsk, IYF
001265045 700__ $$aPospelov, G.E.$$iINSPIRE-00222079$$uMunich, Max Planck Inst.
001265045 700__ $$aProkopenko, N.$$uSerpukhov, IHEP
001265045 700__ $$aRascvetalov, J.$$uSerpukhov, IHEP
001265045 700__ $$aRusakovich, N.$$iINSPIRE-00301212$$uDubna, JINR
001265045 700__ $$aRutherfoord, J.P.$$iINSPIRE-00122016$$uArizona U.
001265045 700__ $$aSalihagic, D.$$iINSPIRE-00122755$$uMunich, Max Planck Inst.
001265045 700__ $$aSavine, A.Y.$$iINSPIRE-00123530$$uArizona U.
001265045 700__ $$aSchacht, P.$$iINSPIRE-00223156$$uMunich, Max Planck Inst.
001265045 700__ $$aSecker, H.$$uMainz U.
001265045 700__ $$aSeifert, F.$$iINSPIRE-00223385$$uDresden, Tech. U.
001265045 700__ $$aSeleznev, V.$$uSerpukhov, IHEP
001265045 700__ $$aShaver, L.$$iINSPIRE-00232490$$uArizona U.
001265045 700__ $$aShilov, S.$$uDubna, JINR
001265045 700__ $$aSnesarev, A.A.$$iINSPIRE-00223739$$uLebedev Inst.
001265045 700__ $$aSoldatov, M.$$uSerpukhov, IHEP
001265045 700__ $$aSpalek, J.$$uKosice, IEF
001265045 700__ $$aSperansky, M.$$uLebedev Inst.
001265045 700__ $$aStoyanova, D.$$uSerpukhov, IHEP
001265045 700__ $$aStraessner, A.$$iINSPIRE-00129196$$uDresden, Tech. U.
001265045 700__ $$aStrizenec, P.$$iINSPIRE-00129337$$uKosice, IEF
001265045 700__ $$aSulin, V.V.$$iINSPIRE-00224090$$uLebedev Inst.
001265045 700__ $$aTalyshev, A.$$iINSPIRE-00224212$$uNovosibirsk, IYF
001265045 700__ $$aTapprogge, S.$$iINSPIRE-00141544$$uMainz U.
001265045 700__ $$aTikhonov, Yu.A.$$iINSPIRE-00198040$$uNovosibirsk, IYF
001265045 700__ $$aUsov, Y.$$uDubna, JINR
001265045 700__ $$aVadeev, V.$$uDubna, JINR
001265045 700__ $$aVasiliev, I.$$uSerpukhov, IHEP
001265045 700__ $$aWalker, R.$$iINSPIRE-00225350$$uArizona U.
001265045 700__ $$aZeitnitz, C.$$iINSPIRE-00138192$$uWuppertal U.
001265045 710__ $$gHiLum ATLAS Endcap Collaboration
001265045 773__ $$cP05005$$pJINST$$v5$$y2010
001265045 8564_ $$uhttp://arxiv.org/pdf/1005.1784.pdf$$yPreprint
001265045 8564_ $$8621942$$s696896$$uhttp://cds.cern.ch/record/1265045/files/JINST5.P05005.pdf$$yIOP Open Access Article
001265045 8564_ $$81369995$$s46703$$uhttp://cds.cern.ch/record/1265045/files/Figures_Run230Spill2.png$$y00004 Measurements of the HV currents for one spill taken during run 230 for one of the four readout channels. Upward pointing triangles indicate measurements assigned to a spill. Downward pointing triangles correspond to background measurements between the spills. The horizontal line shows the threshold to separate the spillsfrom background.
001265045 8564_ $$81369996$$s16913$$uhttp://cds.cern.ch/record/1265045/files/Figures_Ratio12Run230-244.png$$y00006 Ratios of HV currents between channel\,1 and channel\,0 in the left plot and channel\,1 and channel\,2 in the right plot for runs 230, 240-244. For each channel the integrated HV current over one spill is used tocalculate the ratios. \\
001265045 8564_ $$81369997$$s765324$$uhttp://cds.cern.ch/record/1265045/files/10.1088_1748-0221_5_05_P05005.pdf$$yFulltext
001265045 8564_ $$81369998$$s62872$$uhttp://cds.cern.ch/record/1265045/files/Figures_channellayout_beschriftet.png$$y00001 Left: Channel layout during the April 2008 data taking run. Channels surrounded by circles were connected to the additional measurement device. Channels crossed out were not operational during the April run. Right: The FCALchick used in the Protvino test beams. The copper absorber matrix holds the rods with signal pins. Some of the rods are not installed. Also visible is thecooling loop for liquid-nitrogen cooling.
001265045 8564_ $$81369999$$s35012$$uhttp://cds.cern.ch/record/1265045/files/Figures_Setup.png$$y00000 Schematic layout of the experimental setup of the high luminositytest beam. The beam direction is from left to right. See text for details.
001265045 8564_ $$81370000$$s15878$$uhttp://cds.cern.ch/record/1265045/files/Figures_Ratio10Run230-244.png$$y00005 Ratios of HV currents between channel\,1 and channel\,0 in the left plot and channel\,1 and channel\,2 in the right plot for runs 230, 240-244. For each channel the integrated HV current over one spill is used tocalculate the ratios. \\
001265045 8564_ $$81370001$$s31926$$uhttp://cds.cern.ch/record/1265045/files/Figures_CurrentSumRun230-241.png$$y00007 Measured HV current summed over the channels 0, 1, and 2 vs. beam intensity compared to a non-linear fit for period A (runs 230, 240, 241) in the top plot, a magnified view of run 230 in the middle plot, and period B (runs 242-244) in the bottom plot.
001265045 8564_ $$81370002$$s285052$$uhttp://cds.cern.ch/record/1265045/files/Figures_FCALchick_beschriftet.png$$y00002 Left: Channel layout during the April 2008 data taking run. Channels surrounded by circles were connected to the additional measurement device. Channels crossed out were not operational during the April run. Right: The FCALchick used in the Protvino test beams. The copper absorber matrix holds the rods with signal pins. Some of the rods are not installed. Also visible is thecooling loop for liquid-nitrogen cooling.
001265045 8564_ $$81370003$$s705991$$uhttp://cds.cern.ch/record/1265045/files/arXiv:1005.1784.pdf
001265045 8564_ $$81370004$$s35289$$uhttp://cds.cern.ch/record/1265045/files/Figures_CurrentSumRun242-244.png$$y00009 Measured HV current summed over the channels 0, 1, and 2 vs. beam intensity compared to a non-linear fit for period A (runs 230, 240, 241) in the top plot, a magnified view of run 230 in the middle plot, and period B (runs 242-244) in the bottom plot.
001265045 8564_ $$81370005$$s498534$$uhttp://cds.cern.ch/record/1265045/files/Figures_MeasurementBox.png$$y00003 Device for the additional independent measurement of the HV current. The four 24\,bit ADCs for the four HV current readout channels of the FCALchick are connected to a microcontroller to process their data and to add a timestamp from the real time clock to each measurement. The readout frequency is \unit{10}{$Hz$} per channel and theresolution is \unit{$1.2$}{\nano\ampere} per bit.
001265045 8564_ $$81370006$$s33342$$uhttp://cds.cern.ch/record/1265045/files/Figures_CurrentSumRun230-241Zoom.png$$y00008 Measured HV current summed over the channels 0, 1, and 2 vs. beam intensity compared to a non-linear fit for period A (runs 230, 240, 241) in the top plot, a magnified view of run 230 in the middle plot, and period B (runs 242-244) in the bottom plot.
001265045 8564_ $$81370007$$s49331$$uhttp://cds.cern.ch/record/1265045/files/Figures_PVSS_Run211-223All.png$$y00010 Comparison of the ISEG internal measurements of the HV current and the HV current measured by the external measurement device for runs 211-223on a spill-by-spill basis.
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