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18 July 2008 Modelling and reduction of noise in transition edge sensor detectors
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Current and future astronomical detectors based on Transition Edge Sensors (TESs) need to achieve theoretically predicted current noise performance determined by the sum of contributions from thermal noise in the link to the heat bath, Johnson noise in the sensor itself and noise in the electrical readout circuit. Present TES geometries can have noise levels significantly above this limit. Our Mo/Cu bilayer TESs are fabricated on long, narrow, thermally isolating silicon nitride structures and are designed for operation at 360 or 200 mK. We briefly review the likely sources of the additional noise sources in this geometry and show results of measurements and modelling of the noise sources as the TES geometry is modified for TESs operated at both temperatures.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. J. Goldie, M. D. Audley, D. M. Glowacka, V. N. Tsaneva, and S. Withington "Modelling and reduction of noise in transition edge sensor detectors", Proc. SPIE 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV, 70200K (18 July 2008);

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