Studies and development of FBG based multi-point temperature sensor for vacuum chambers of synchrotron radiation source Indus-2

• 出版年: Results in Optics
• 主要な著者: J. Kumar, S. Kumar, R. Mahakud, K.V.A.N.P.S. Kumar, B. Sindal, D.P. Yadav, P.K. Agrawal, M.K. Saxena, O. Prakash
• フォーマット: 論文
• 言語: 英語
• 出版事項: Elsevier 2025-05-01
• 主題: Fiber Bragg grating (FBG); Temperature sensor; Indus-2; Dipole magnet; Pinger magnet; Copper vapour laser
• オンライン･アクセス: http://www.sciencedirect.com/science/article/pii/S2666950125000331

This paper presents the development and deployment of a multi-point fiber Bragg grating (FBG) sensor system for precise temperature monitoring along the vacuum chamber walls of dipole and Pinger magnets in Indus-2, a synchrotron radiation source. The challenging environment includes bremsstrahlung radiation (20 Rad/h), strong magnetic fields (1.5 T), and high RF fields (∼0.8 MV/m at 505.812 MHz). The sensor system was created by inscribing multiple FBGs at distinct wavelengths on a single optical fiber using the second harmonic of a copper vapor laser (CVL). The FBG array was validated for operation in high-radiation and high-voltage (∼10 kV) conditions. It was installed to monitor temperature profiles during Indus-2 operation at 2.5 GeV, 200 mA, where chamber temperatures ranged from 18 °C to 40 °C. The significance of this observation lies in its potential application for the early detection of electron beam orbit mis-steering occurrences, thereby facilitating real-time temperature monitoring and the subsequent optimization of electron beam orbit alignment. Such proactive measures are crucial for ensuring the dependable and consistent operation of Indus-2.