Conveners
Session VIII
- Paola Ferrario
The use of wavelength-shifting coatings are of primary interest in the area of liquified noble gases detectors, namely, argon and xenon used as active medium in the neutrino
physics and dark matter experiments.
In fact, charged particles crossing the noble liquid volume produce excitation and ionization followed by recombination and both the processes lead to the emission of VUV...
Dual-phase (gas-liquid) argon (Ar) and xenon (Xe) time projection chambers (TPC) are promising dark-matter (DM) detectors; hence various international collaborations plan to construct big TPCs based on them. Interactions in these detectors induce scintillation in the far ultraviolet (FUV) at ~128 mn (Ar) or ~172 nm (Xe).
Unfortunately, coatings for the FUV present an intrinsic challenge...
Noble liquid scintillators like argon (LAr) and xenon (LXe) are used as the main detection medium for many particle and rare-event search detectors in part due to their high scintillation yield, background rejection capabilities and scalability to large volumes. Many detectors combine measurements of the scintillation light from the noble liquids with a time projection chamber (TPC) which...
Polyethylene naphthalate (PEN) foils have been demonstrated as a wavelength shifter suitable for operation in liquid argon. At the same time wavelength shifting efficiency of technical grades of PEN, commercially available on the market, is lower than that of tetraphenyl butadiene. This talk will report on an R&D program focused on exploring the intrinsic limitations of PEN and optimizing it...
The LEGEND experiment aims to detect the neutrinoless double beta decay of $^{76}$Ge, which would prove the Majorana nature of neutrinos, with a sensitivity for the half-life of $10^{28}$ years. To this end, one tonne of high-purity germanium (HPGe) detectors will be deployed in a segmented liquid argon (LAr) medium, which is used as coolant and instrumented as a detector for the active...
