High impedance TES bolometers for EDELWEISS
S. Marnieros
(1)
,
E. Armengaud
(2)
,
Q. Arnaud
(3)
,
C. Augier
(3)
,
A. Benoît
(4)
,
L. Bergé
(1)
,
J. Billard
(3)
,
A. Broniatowski
(1)
,
P. Camus
(5)
,
A. Cazes
(3)
,
M. Chapellier
(1)
,
F. Charlieux
(3)
,
M. de Jésus
(3)
,
L. Dumoulin
(1)
,
K. Eitel
,
J.-B. Fillipini
(3)
,
D. Filosofov
(6)
,
J. Gascon
(3)
,
A. Giuliani
(1)
,
M. Gros
(2)
,
Y. Jin
(7)
,
A. Juillard
(3)
,
M. Kleifges
(6)
,
H. Lattaud
(3)
,
D. Misiak
(3)
,
X.-F. Navick
(2)
,
C. Nones
(2)
,
E. Olivieri
(1)
,
C. Oriol
(1)
,
P. Pari
(2)
,
B. Paul
(2)
,
D. Poda
(1)
,
S. Rozov
(8)
,
T. Salagnac
(3)
,
V. Sanglard
(3)
,
L. Vagneron
(3)
,
E. Yakushev
(8)
,
A. Zolotarova
(1)
1
IJCLab -
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
3 IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
4 NEEL - HELFA - Hélium : du fondamental aux applications
5 NEEL - Cryo - Cryogénie
6 KIT - Karlsruhe Institute of Technology = Karlsruher Institut für Technologie
7 C2N - Centre de Nanosciences et de Nanotechnologies [Orsay]
8 JINR - Joint Institute for Nuclear Research
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
3 IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
4 NEEL - HELFA - Hélium : du fondamental aux applications
5 NEEL - Cryo - Cryogénie
6 KIT - Karlsruhe Institute of Technology = Karlsruher Institut für Technologie
7 C2N - Centre de Nanosciences et de Nanotechnologies [Orsay]
8 JINR - Joint Institute for Nuclear Research
Résumé
The EDELWEISS collaboration aims for direct detection of light dark matter using germanium cryogenic detectors with low threshold phonon sensor technologies and efficient charge readout designs. We describe here the development of Ge bolometers equipped with high impedance thermistors based on a NbxSi1-x TES alloy. High aspect ratio spiral designs allow the TES impedance to match with JFET or HEMT front-end amplifiers. We detail the behavior of the superconducting transition properties of these sensors and the detector optimization in terms of sensitivity to out-of-equilibrium phonons. We report preliminary results of a 200 g Ge detector that was calibrated using 71Ge activation by neutrons at the LSM underground laboratory.