Speaker
Description
An experiment to search for neutrinoless double beta decay in $^{124}$Sn has been initiated in India [1]. It is envisaged to use a superconducting tin-based cryogenic bolometer (TIN.TIN) operating at $\sim$10 mK for this purpose. It is important to study various systematics related to the cryogenic bolometer with a relatively simpler and well-studied absorber material before making a superconducting tin bolometer. With this motivation, a cryogenic bolometer is made with a sapphire absorber ($\sim$0.7 g) and indigenously made NTD Ge sensor [2]. A systematic study of the bolometer performance in the temperature range of 10-100 mK is performed with phonon pulses of energy equivalent to 0.3 - 5 MeV. A C++ and ROOT based pulse analysis program is developed implementing Savitzky-Golay filtering technique for analysing the bolometer signal. In this paper, response of the sapphire bolometer to phonon pulses in the temperature range of 10-100 mK will be presented. Performance of the bolometer with the addition of a moderate size tin sample ($\sim$0.6 g) to the sapphire substrate is studied. Response of the bolometer, when tested with a $^{241}$Am-$^{239}$Pu alpha source will be presented. Impact of vibration on the bolometer will also be discussed.
- V. Nanal, EPJ Web of Conferences 66 (2014) 08005.
- A. Garai et al. Journal of Low Temperature Physics 184 (2016) 609.
| Student (Ph.D., M.Sc. or B.Sc.) | Y |
|---|---|
| Less than 5 years of experience since completion of Ph.D | N |
