Calibration System for Avalanche Photodiodes in X-Ray Polarimeters
Author Information
Author(s): Alimenti Andrea, Cologgi Fabrizio, Fabiani Sergio, Torokhtii Kostiantyn, Silva Enrico, Del Monte Ettore, Baffo Ilaria, Bonomo Sergio, Brienza Daniele, Campana Riccardo, Centrone Mauro, De Iulis Giulia, Costa Enrico, Cucinella Giovanni, Curatolo Andrea, De Angelis Nicolas, De Cesare Giovanni, Del Re Andrea, Di Cosimo Sergio, Di Filippo Simone, Di Marco Alessandro, Di Persio Giuseppe, Donnarumma Immacolata, Fanelli Pierluigi, Kumar Abhay, Leonetti Paolo, Locarini Alfredo, Loffredo Pasqualino, Lombardi Giovanni, Minervini Gabriele, Modenini Dario, Muleri Fabio, Natalucci Silvia, Negri Andrea, Perelli Massimo, Rossi Monia, Rubini Alda, Scalise Emanuele, Soffitta Paolo, Terracciano Andrea, Tortora Paolo, Zaccagnino Emanuele, Zambardi Alessandro
Primary Institution: Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University
Hypothesis
How does temperature and bias voltage affect the gain of avalanche photodiodes used in X-ray polarimeters?
Conclusion
The developed calibration system can accurately characterize avalanche photodiodes and stabilize their gain across varying temperatures and bias voltages.
Supporting Evidence
- The system can characterize avalanche photodiodes across a wide temperature range.
- Feedback mechanisms were developed to stabilize the gain of the photodiodes.
- The calibration system was tested in a climate chamber to simulate space conditions.
- Results showed that gain increases with higher bias voltage and lower temperature.
- Energy resolution was found to depend on the bias voltage and temperature.
- Control curves were established to maintain stable gain during temperature fluctuations.
- Uncertainty analysis indicated that gain stability is crucial for accurate photon detection.
- The study provides a framework for future spaceborne polarimeter missions.
Takeaway
This study created a system to help measure and stabilize the performance of special sensors used in space to detect X-rays from solar flares.
Methodology
The study involved designing a measurement system to assess the gain and energy resolution of avalanche photodiodes across a range of temperatures and bias voltages.
Limitations
The study does not evaluate the long-term stability of the calibration system in actual space conditions.
Digital Object Identifier (DOI)
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