A high precision pulse generation and stabilization system for bolometric experiments

Bolometric experiments searching for rare events usually require an extremely low radioactive background to prevent spurious signals from mimicking those of interest, spoiling the sensitivity of the apparatus. In such contexts, radioactive sources cannot be used to produce a known signal to calibrat...

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Bibliographic Details
Published in:Journal of instrumentation 2018-02, Vol.13 (2), p.P02029-P02029
Main Authors: Alfonso, K., Carniti, P., Cassina, L., Giachero, A., Gotti, C., Pessina, G.
Format: Article
Language:English
Subjects:
Bolometers
Controller area network
Energy resolution
Energy spectra
Experiments
Instruments & Instrumentation
Pulse duration
Remote control
Remote monitoring
Thermal stability
Variations
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Summary:Bolometric experiments searching for rare events usually require an extremely low radioactive background to prevent spurious signals from mimicking those of interest, spoiling the sensitivity of the apparatus. In such contexts, radioactive sources cannot be used to produce a known signal to calibrate the measured energy spectrum during data taking. In this paper we present an instrument designed to generate ultra-stable and very precise calibrating pulses, which can be used to stabilize the response of bolometers during data taking. The instrument is characterized by the presence of multi-outputs, a completely programmable pulse width and amplitude and a dedicated daisy-chained optical trigger line. It can be fully controlled and monitored remotely via CAN bus protocol. An energy resolution of the order of 20 eV FWHM at 1 MeV (2 eV FWHM at 10 keV) and a thermal stability of the order of 0.1 ppm/ˆC have been achieved. The device can also provide an adjustable power to compensate the low frequency thermal fluctuations that typically occur in cryogenic experiments.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/13/02/P02029