Measurement of characteristic impedance of silicon fiber sheet based readout strip panel for RPC detector in INO. (27th January 2017)

• Record Type: Journal Article
• Authors: Singh, M.K.; Kumar, A.; Marimuthu, N.; Singh, V.; Subrahmanyam, V.S.
• Is Part Of: Journal of instrumentation. Volume 12:Number 1(2017:Jan.)
• Page Start: T01006
• Page End: T01006
• Publication Date: 2017-01-27
• Subjects: Gaseous detectors -- Materials for gaseous detectors -- Neutrino detectors -- Resistive-plate chambers; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/12/01/T01006
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: The I ndia-based N eutrino O bservatory (INO) is a mega science project of India, which is going to use about 30, 000 R esistive P late C hambers (RPC) as active detector elements for the study of atmoshpheric neutrino oscillations. Each RPC detector will consist of two orthogonally placed readout strip panel for picking the signals generated in the gas chamber. The area of RPC detector in INO-ICAL (Iron Calorimeter) experiment will be 2 m × 2 m, therefore the dimensions of readout strip panel should also be 2 m × 2 m. To get undistorted signals pass through the readout strip panel to front-end electronics, their characteristic impedance should be matched with each other. In the present paper, we describe the need and search of new dielectric material for the fabrication of flame resistant, waterproof and flexible readout strip panel. We will also describe the measurement of characteristic impedance of Plastic Honeycomb (PH) based readout strip panel and Silicon Fiber Sheet (SFS) based readout strip panel in a comparative way, and its variation under loading and with time. Based on this study, we found that a 5 mm thick SFS-based readout strip panel has a minimum signal reflection at 49.5 ohm characteristic impedance value. Our study shows that SFS is a good dielectric material for the purpose.