Study of the effect of external noise pickups on the performance of a cryogenic bolometer

A. Garai; A. Reza; A. Mazumdar; H. Krishnamoorthy; G. Gupta; M. S. Pose; S. Mallikarjunachary; V. Nanal; R. G. Pillay; S. Ramakrishnan

doi:10.1063/1.5115595

Study of the effect of external noise pickups on the performance of a cryogenic bolometer

A. Garai, A. Reza, A. Mazumdar, H. Krishnamoorthy, G. Gupta, M. S. Pose, S. Mallikarjunachary, V. Nanal, R. G. Pillay, S. Ramakrishnan

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2 Scopus citations

Abstract

This paper reports the detailed noise characterization, investigation of various noise sources, and its mitigation to improve the performance of a cryogenic bolometer detector for the TIN.TIN experiment. The noise spectrum has been measured for a sapphire bolometer test setup with an indigenously developed neutron transmutation doped Ge sensor in the cryogen free dilution refrigerator system at Mumbai. The effect of external noise, arising either from ground loops in the system or from the diagnostic and control electronics of the cryostat, on the performance of the bolometer is assessed. A systematic comparison of the influence of different noise pickups on the bolometer resolution is also presented. The best-achieved resolution (σ_E) at 15 mK is ∼15 keV for heater pulses and appears to be mainly limited by the noise due to the pulse tube cryocooler.

Original language	English
Article number	096104
Journal	Review of Scientific Instruments
Volume	90
Issue number	9
DOIs	https://doi.org/10.1063/1.5115595
State	Published - Sep 1 2019
Externally published	Yes

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title = "Study of the effect of external noise pickups on the performance of a cryogenic bolometer",

abstract = "This paper reports the detailed noise characterization, investigation of various noise sources, and its mitigation to improve the performance of a cryogenic bolometer detector for the TIN.TIN experiment. The noise spectrum has been measured for a sapphire bolometer test setup with an indigenously developed neutron transmutation doped Ge sensor in the cryogen free dilution refrigerator system at Mumbai. The effect of external noise, arising either from ground loops in the system or from the diagnostic and control electronics of the cryostat, on the performance of the bolometer is assessed. A systematic comparison of the influence of different noise pickups on the bolometer resolution is also presented. The best-achieved resolution (σE) at 15 mK is ∼15 keV for heater pulses and appears to be mainly limited by the noise due to the pulse tube cryocooler.",

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AU - Garai, A.

AU - Reza, A.

AU - Mazumdar, A.

AU - Krishnamoorthy, H.

AU - Gupta, G.

AU - Pose, M. S.

AU - Mallikarjunachary, S.

AU - Nanal, V.

AU - Pillay, R. G.

AU - Ramakrishnan, S.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - This paper reports the detailed noise characterization, investigation of various noise sources, and its mitigation to improve the performance of a cryogenic bolometer detector for the TIN.TIN experiment. The noise spectrum has been measured for a sapphire bolometer test setup with an indigenously developed neutron transmutation doped Ge sensor in the cryogen free dilution refrigerator system at Mumbai. The effect of external noise, arising either from ground loops in the system or from the diagnostic and control electronics of the cryostat, on the performance of the bolometer is assessed. A systematic comparison of the influence of different noise pickups on the bolometer resolution is also presented. The best-achieved resolution (σE) at 15 mK is ∼15 keV for heater pulses and appears to be mainly limited by the noise due to the pulse tube cryocooler.

AB - This paper reports the detailed noise characterization, investigation of various noise sources, and its mitigation to improve the performance of a cryogenic bolometer detector for the TIN.TIN experiment. The noise spectrum has been measured for a sapphire bolometer test setup with an indigenously developed neutron transmutation doped Ge sensor in the cryogen free dilution refrigerator system at Mumbai. The effect of external noise, arising either from ground loops in the system or from the diagnostic and control electronics of the cryostat, on the performance of the bolometer is assessed. A systematic comparison of the influence of different noise pickups on the bolometer resolution is also presented. The best-achieved resolution (σE) at 15 mK is ∼15 keV for heater pulses and appears to be mainly limited by the noise due to the pulse tube cryocooler.

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Study of the effect of external noise pickups on the performance of a cryogenic bolometer

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