Investigation of the in-pixel response of the Mupix11 monolithic pixel sensor using a microfocus X-ray beam at Diamond Light Source

Fuente: arXiv

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Bibliographische Detailangaben
Hauptverfasser:	Rotelli, A. S., Augustin, H., Bortoletto, D., Brooks, A., Grimes, M., Knight, A. J. A., Köppel, M. S., McDougall, A. E., Plackett, R., Sultan, D M S, Vigani, L., Wood, S.
Format:	Preprint
Veröffentlicht:	2026
Schlagworte:	Instrumentation and Detectors
Online-Zugang:	Acceder al recurso
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author	Rotelli, A. S. Augustin, H. Bortoletto, D. Brooks, A. Grimes, M. Knight, A. J. A. Köppel, M. S. McDougall, A. E. Plackett, R. Sultan, D M S Vigani, L. Wood, S.
author_facet	Rotelli, A. S. Augustin, H. Bortoletto, D. Brooks, A. Grimes, M. Knight, A. J. A. Köppel, M. S. McDougall, A. E. Plackett, R. Sultan, D M S Vigani, L. Wood, S.
contents	MuPix11 is a High-Voltage Monolithic Active Pixel Sensor (HV-MAPS) developed for the tracking system of the Mu3e experiment. The in-pixel photon response of a MuPix11 sensor thinned to 70 μm was measured using an 8 keV X-ray beam with a 3 μm spot size at the B16 beamline at Diamond Light Source, emulating the passage of a minimum ionising particle (MIP). At nominal operating voltage and threshold, high-resolution scans across the pixel matrix show the detector response to be uniform. In the absence of reverse bias (0 V), the relative sub-pixel response is location-dependent as a reduced detection rate is observed at pixel boundaries.
format	Preprint
id	arxiv_https___arxiv_org_abs_2604_24367
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Investigation of the in-pixel response of the Mupix11 monolithic pixel sensor using a microfocus X-ray beam at Diamond Light Source Rotelli, A. S. Augustin, H. Bortoletto, D. Brooks, A. Grimes, M. Knight, A. J. A. Köppel, M. S. McDougall, A. E. Plackett, R. Sultan, D M S Vigani, L. Wood, S. Instrumentation and Detectors MuPix11 is a High-Voltage Monolithic Active Pixel Sensor (HV-MAPS) developed for the tracking system of the Mu3e experiment. The in-pixel photon response of a MuPix11 sensor thinned to 70 μm was measured using an 8 keV X-ray beam with a 3 μm spot size at the B16 beamline at Diamond Light Source, emulating the passage of a minimum ionising particle (MIP). At nominal operating voltage and threshold, high-resolution scans across the pixel matrix show the detector response to be uniform. In the absence of reverse bias (0 V), the relative sub-pixel response is location-dependent as a reduced detection rate is observed at pixel boundaries.
title	Investigation of the in-pixel response of the Mupix11 monolithic pixel sensor using a microfocus X-ray beam at Diamond Light Source
topic	Instrumentation and Detectors
url	https://arxiv.org/abs/2604.24367