1. HEMT-Based 1 K Front-End Electronics for the Heat and Ionization Ge CryoCube of the Future Ricochet CEνNS Experiment.
- Author
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Baulieu, G., Billard, J., Bres, G., Bret, J.-L., Chaize, D., Colas, J., Dong, Q., Exshaw, O., Guerin, C., Ferriol, S., Filippini, J.-B., De Jesus, M., Jin, Y., Juillard, A., Lamblin, J., Lattaud, H., Minet, J., Misiak, D., Monfardini, A., and Rarbi, F.
- Subjects
MODULATION-doped field-effect transistors ,NUCLEAR energy ,NEUTRINO interactions ,NEUTRINOS ,ELASTIC scattering ,NEUTRINO detectors ,EXOTIC nuclei - Abstract
The Ricochet reactor neutrino observatory is planned to be installed at the Laue Langevin Institute starting mid-2022. Its scientific goal is to perform a low-energy and high precision measurement of the coherent elastic neutrino-nucleus scattering spectrum in order to explore exotic physics scenarios. Ricochet will host two cryogenic detector arrays: the CryoCube (Ge target) and the Q-array (Zn target), operated at 10 mK. The 1 kg Ge CryoCube will consist of 27 Ge crystals instrumented with NTD-Ge thermal sensors and charge collection electrodes for a simultaneous heat and ionization readout to reject the electromagnetic backgrounds (gamma, beta, x-rays). We present the status of its front-end electronics. The first stage of amplification is made of High Electron Mobility Transistors developed by CNRS/C2N laboratory, optimized to achieve ultra-low noise performance at 1 K with a dissipation as low as 15 μ W per channel. Our noise model predicts that 10 eV heat and 20 eV ee RMS baseline resolutions are feasible with a high dynamic range for the deposited energy (up to 10 MeV) thanks to loop amplification schemes. Such resolutions are mandatory to have a high discrimination power between nuclear and electron recoils at the lowest energies. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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