PreprintCC BY 4.0arXiv20 Oct 2026

Pulse Shape Model for a Light Enhanced Phonon Detector

G. Angloher
M. R. Bharadwaj
A. Böhmer
S. Braun
M. R. Cababie
I. Colantoni
I. Dafinei
N. Di Marco
C. Dittmar
F. Ferella
F. Ferroni
S. Fichtinger

35 more authors

A. Filipponi
M. Friedl
D. Fuchs
L. Gai
M. Gapp
M. Heikinheimo
K. Heim
M. N. Hughes
K. Huitu
M. Kellermann
A. Mancuso
L. Pagnanini
F. Petricca
C. Petrucci
S. Pirro
F. Pröbst
G. Profeta
A. Puiu
F. Reindl
K. Schäffner
J. Schieck
P. Schreiner
C. Schwertner
P. Settembri
K. Shera
M. Stahlberg
A. Stendahl
M. Stukel
C. Tresca
S. Yue
V. Zema
Y. Zhu
L. Ziegele
N. Zimmermann
O. Schulz

Abstract

COSINUS has tested prototype NaI-based cryogenic scintillating calorimeters with a composite design, in which the transition edge sensor (TES) is fabricated on a separate carrier crystal coupled to the NaI target. Measurements with the composite detectors showed deviations from the known pulse shape description for cryogenic calorimeters and did not reveal an identifiable nuclear recoil population during a neutron calibration. In this work we present a new pulse shape model which provides an explanation to these observations and that laid the foundation for the development of the final COSINUS phonon detector design named remote TES (remoTES). We demonstrate that the first COSINUS detector prototypes featured a phonon channel with signal enhancement by light absorption in the carrier, namely a light enhanced phonon detector. This design offers for the first time the chance to use a single channel phonon detector for particle discrimination. We present recent results using a novel pulse shape fitting method based on the Bayesian inference software package BAT.jl.

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BibTeX RIS

BibTeX

@misc{angloher2026pulse,
  title = {{Pulse Shape Model for a Light Enhanced Phonon Detector}},
  author = {G. Angloher and M. R. Bharadwaj and A. Böhmer and S. Braun and M. R. Cababie and I. Colantoni and I. Dafinei and N. Di Marco and C. Dittmar and F. Ferella and F. Ferroni and S. Fichtinger and A. Filipponi and M. Friedl and D. Fuchs and L. Gai and M. Gapp and M. Heikinheimo and K. Heim and M. N. Hughes and K. Huitu and M. Kellermann and A. Mancuso and L. Pagnanini and F. Petricca and C. Petrucci and S. Pirro and F. Pröbst and G. Profeta and A. Puiu and F. Reindl and K. Schäffner and J. Schieck and P. Schreiner and C. Schwertner and P. Settembri and K. Shera and M. Stahlberg and A. Stendahl and M. Stukel and C. Tresca and S. Yue and V. Zema and Y. Zhu and L. Ziegele and N. Zimmermann and O. Schulz},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.28161},
  eprint = {2610.28161},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.28161},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Pulse Shape Model for a Light Enhanced Phonon Detector
AU  - G. Angloher
AU  - M. R. Bharadwaj
AU  - A. Böhmer
AU  - S. Braun
AU  - M. R. Cababie
AU  - I. Colantoni
AU  - I. Dafinei
AU  - N. Di Marco
AU  - C. Dittmar
AU  - F. Ferella
AU  - F. Ferroni
AU  - S. Fichtinger
AU  - A. Filipponi
AU  - M. Friedl
AU  - D. Fuchs
AU  - L. Gai
AU  - M. Gapp
AU  - M. Heikinheimo
AU  - K. Heim
AU  - M. N. Hughes
AU  - K. Huitu
AU  - M. Kellermann
AU  - A. Mancuso
AU  - L. Pagnanini
AU  - F. Petricca
AU  - C. Petrucci
AU  - S. Pirro
AU  - F. Pröbst
AU  - G. Profeta
AU  - A. Puiu
AU  - F. Reindl
AU  - K. Schäffner
AU  - J. Schieck
AU  - P. Schreiner
AU  - C. Schwertner
AU  - P. Settembri
AU  - K. Shera
AU  - M. Stahlberg
AU  - A. Stendahl
AU  - M. Stukel
AU  - C. Tresca
AU  - S. Yue
AU  - V. Zema
AU  - Y. Zhu
AU  - L. Ziegele
AU  - N. Zimmermann
AU  - O. Schulz
PY  - 2026
DA  - 2026/10/20
PB  - arXiv
DO  - 10.48550/arxiv.2610.28161
UR  - https://arxiv.org/abs/2610.28161
AB  - COSINUS has tested prototype NaI-based cryogenic scintillating calorimeters with a composite design, in which the transition edge sensor (TES) is fabricated on a separate carrier crystal coupled to the NaI target. Measurements with the composite detectors showed deviations from the known pulse shape description for cryogenic calorimeters and did not reveal an identifiable nuclear recoil population during a neutron calibration. In this work we present a new pulse shape model which provides an explanation to these observations and that laid the foundation for the development of the final COSINUS phonon detector design named remote TES (remoTES). We demonstrate that the first COSINUS detector prototypes featured a phonon channel with signal enhancement by light absorption in the carrier, namely a light enhanced phonon detector. This design offers for the first time the chance to use a single channel phonon detector for particle discrimination. We present recent results using a novel pulse shape fitting method based on the Bayesian inference software package BAT.jl.
ER  -

Abstract

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