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Large-area photon calorimeter with Ir-Pt bilayer transition-edge sensor for the CUPID experiment

Journal Article · · Physical Review Applied
 [1];  [1];  [1];  [1];  [2];  [2];  [3];  [3];  [3];  [4];  [5];  [5];  [6];  [6];  [6];  [6];  [6];  [6];  [6];  [6]
  1. University of California, Berkeley, CA (United States)
  2. University of California, Berkeley, CA (United States); GSSI-Gran Sasso Science Institute, L’Aquila (Italy)
  3. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  4. Argonne National Laboratory (ANL), Argonne, IL (United States); University of Chicago, IL (United States)
  5. University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  6. Argonne National Laboratory (ANL), Argonne, IL (United States)
CUPID is a next-generation neutrinoless double-β decay experiment that will require cryogenic light detectors to improve background suppression, via the simultaneous readout of heat and light channels from its scintillating crystals. In this work, we showcase light detectors based on an alternative Ir-Pt bilayer transition-edge sensor. We have performed a systematic study to improve the thermal coupling between the photon absorber and the sensor, and thereby its responsivity. Our first devices meet CUPID's baseline noise requirement of < 100 eV rms. Our detectors have risetimes of approximately 180μs and measured timing jitter of < 20μs for the expected signal to noise at the Q value of the decay, which achieves the CUPID's criterion of rejecting two-neutrino double-β decay pile-up events. In conclusion, the current work will inform the fabrication of future devices, culminating in the final TES design and a scaleable readout scheme for CUPID.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials (CNM); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357; FG02-00ER41138
OSTI ID:
2281556
Alternate ID(s):
OSTI ID: 2569115
Journal Information:
Physical Review Applied, Journal Name: Physical Review Applied Journal Issue: 6 Vol. 20; ISSN 2331-7019
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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