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28 March 2024 |
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Readout of GEM Detectors Using the Medipix2 CMOS Pixel Chip | A. Bamberger
; K. Desch
; U. Renz
; M. Titov
; N. Vlasov
; P. Wienemann
; A. Zwerger
; | Date: |
23 Nov 2006 | Subject: | Instrumentation and Detectors | Abstract: | We have operated a Medipix2 CMOS readout chip, with amplifying, shaping and charge discriminating front-end electronics integrated on the pixel-level, as a highly segmented direct charge collecting anode in a three-stage gas electron multiplier (Triple-GEM) to detect the ionization from $^{55}$Fe X-rays and electrons from $^{106}$Ru. The device allows to perform moderate energy spectroscopy measurements (20 % FWHM at 5.9 keV $X$-rays) using only digital readout and two discriminator thresholds. Being a truly 2D-detector, it allows to observe individual clusters of minimum ionizing charged particles in $Ar/CO_2$ (70:30) and $He/CO_2$ (70:30) mixtures and to achieve excellent spatial resolution for position reconstruction of primary clusters down to $sim 50 mu m$, based on the binary centroid determination method. | Source: | arXiv, physics/0611229 | Services: | Forum | Review | PDF | Favorites |
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