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000293246 1001_ $$aBilka, T.$$b0
000293246 1112_ $$a19th Real Time Conference$$cNara$$d2014-05-26 - 2014-05-30$$g(RT2014)$$wJapan
000293246 245__ $$aDemonstrator of the Belle II Online Tracking and Pixel Data Reduction on the High Level Trigger System
000293246 260__ $$aNew York, NY$$bIEEE$$c2015
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000293246 520__ $$aThe future Belle II experiment will employ a computer-farm based data reduction system for the readout of its innermost detector, a DEPFET-technology based silicon detector with pixel readout. A large fraction of the background hits can be rejected by defining a set of regions of interest (ROIs) on the pixel detector sensors (PXD) and then recording just the data from the pixels inside the ROI. The ROIs are defined on an event by event basis by extrapolating back onto the PXD the charged tracks detected in the outer trackers (a four-layer double-sided silicon strip detector surrounded by a wire chamber). The tracks are reconstructed in real time on the High Level Trigger (HLT). The pixel detector is then read out based on the ROI information. A demonstrator of this architecture was under beam test earlier this year in DESY (Hamburg, Germany). The demonstrator was operated in an electron beam whose momentum was in the 2-6 GeV/c range with a typical trigger rate of a few kilohertz in a magnetic field of strength up to 1 T. The demonstrator consists of one pixel sensor and four silicon strip sensors arranged in a five-layer configuration mimicking the Belle II vertex detector. The detector readout was a scaled down version of the full Belle II DAQ + HLT chain. The demonstrator was used to detect the particles, reconstruct in real time the trajectories, identify the ROIs on the PXD plane and record the PXD data within. We describe the requirements and the architecture of the final system together with the results obtained with the demonstrator.
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000293246 536__ $$0G:(DE-H253)POF2-BELLE-I-II-Exp.-20130405$$aExperiments at KEK (BELLE I/II) (POF2-515)$$cPOF2-515$$fPOF II$$x1
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000293246 7001_ $$aCasarosa, G.$$b1
000293246 7001_ $$aFruhwirth, R.$$b2
000293246 7001_ $$0P:(DE-H253)PIP1002217$$aKleinwort, C.$$b3
000293246 7001_ $$aKodys, P.$$b4
000293246 7001_ $$aKvasnicka, P.$$b5
000293246 7001_ $$aLettenbichler, J.$$b6
000293246 7001_ $$aPaoloni, E.$$b7
000293246 7001_ $$aRauch, J.$$b8
000293246 7001_ $$0P:(DE-H253)PIP1021494$$aSchlueter, Tobias Alexander$$b9$$eCorresponding author
000293246 7001_ $$0P:(DE-H253)PIP1005040$$aYashchenko, S.$$b10
000293246 773__ $$0PERI:(DE-600)2025398-9$$a10.1109/TNS.2015.2419879$$gVol. 62, no. 3, p. 1155 - 1161$$n3$$p1155 - 1161$$tIEEE transactions on nuclear science$$v62$$x1558-1578$$y2015
000293246 7870_ $$0PUBDB-2014-04700$$aBilka, T. et.al.$$d2014$$iIsParent$$rarXiv:1406.4955$$tDemonstrator of the Belle II Online Tracking and Pixel Data Reduction on the High Level Trigger System
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