Signals from fluorescent materials on the surface of silicon micro-strip sensors

Journal Article · Thu Jul 26 00:00:00 EDT 2018 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2018.07.073· OSTI ID:1611346

Sperlich, D. ^[1]; Poley, L. ^[2]; Bloch, I. ^[2]; Blue, A. J. ^[3]; Buttar, C. ^[3]; Fadeyev, V. ^[4]; Gray, C. ^[3]; Lacker, H. ^[5]; Rehnisch, L. ^[5]; Stegler, M. ^[2]

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1. Humboldt Univ. of Berlin (Germany); DOE/OSTI
2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
3. Univ. of Glasgow, Scotland (United Kingdom)
4. Univ. of California, Santa Cruz, CA (United States)
5. Humboldt Univ. of Berlin (Germany)

For the High-Luminosity Upgrade of the Large Hadron Collider at CERN, the ATLAS Inner Detector will be replaced with a new, all-silicon tracker (ITk). In order to minimise the amount of material in the ITk, circuit boards with readout electronics will be glued onto the active area of the sensor. Several adhesives, investigated to be used for the construction of detector modules, were found to become fluorescent when exposed to UV light. These adhesives could become a light source in the high-radiation environment of the ATLAS detector. The effect of fluorescent material covering the sensor surface in a high-radiation environment has been studied for a silicon micro-strip sensor using a micro-focused X-ray beam. By positioning the beam parallel to the sensor surface and pointing it both inside the sensor and above the sensor surface inside the deposited glue, the sensor responses from direct hits and fluorescence can be compared with high precision. This contribution presents a setup to study the susceptibility of silicon strip sensors to light contamination from fluorescent materials and shows their impact on the noise and fake signal rate of a sensor operated in a high-radiation environment.

• Research Organization: Univ. of California, Santa Cruz, CA (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: SC0010107
• OSTI ID: 1611346
• Alternate ID(s): OSTI ID: 1703444
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 924; ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
X-ray
fluorescence
silicon sensor