2023 Fiscal Year Research-status Report
Addressing the impact of non-linearity in superconductive bolometers to test cosmological inflation from space with a CMB polarimeter
| Project/Area Number |
22K14054
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
Ghigna Tommaso 大学共同利用機関法人高エネルギー加速器研究機構, 量子場計測システム国際拠点, 特任助教 (60904711)
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| Project Period (FY) |
2022-04-01 – 2025-03-31
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| Keywords | CMB / Transition-edge sensor / B-mode / Inflation |
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| Outline of Annual Research Achievements |
Most of the past year research has been devoted to the design of new TES bolometers for the low frequency end of the spectrum for CMB observations (<100 GHz). The first iteration of fabrication is now ongoing and a first batch of detectors is expected for early JFY 2024.
In parallel I have focused on implementing various tools for science forecasting that take into account systematic effects and to attempt to mitigate them with several collaborators. A handful of papers have been written (or are in an advanced state) on various topics related to detector non-linearity, HWP non-idealities, detector gain, detector cross-talk, correlated noise and more.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The research project has been moving ahead rather smoothly and while the pandemic disrupted some activities at the beginning. The impossibility of spending much of the fundings at the beginning has allowed us to focus on different details and freed more resources that can be used in this coming year to boost international collaboration.
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| Strategy for Future Research Activity |
In the coming year I plan to focus on characterizing the detectors that are being fabricated and implement changes to the design for future fabrication iterations. In parallel I want to develop scaled model of some of the critical RF components to test them thoroughly and study possible solutions for improvement.
I will also continue pushing the development of new computational tools for science forecasting, data analysis and systematic effect mitigation.
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| Causes of Carryover |
Most of the remaining budget is going to be used to foster international collaboration.
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