20 citations · 74 across the 14 of their papers we have counts for
14 papers
Probing the Dark Matter EFT with QUEST-DMC: Projected Sensitivities and Attenuation Ceilings
DMC Collaboration, N. Darvishi, S. Autti +27
This proceedings contribution summarises projected constraints from the QUEST-DMC concept, a surface-based direct-detection experiment using superfluid He operated below the mi…
Characterisation of silicon photomultipliers in a dilution refrigerator down to 9.4 mK towards a cryogenic cosmic-ray muon veto system
DMC Collaboration, A. Kemp, S. Autti +30
We report the characterisation of a FBK NUV-HD-cryo silicon photomultiplier (SiPM) sensor operated in a 9.4 0.2 mK environment inside a dilution refrigerator, towards the dev…
Development of superfluid helium-3 bolometry using nanowire resonators with SQUID readout for the QUEST-DMC experiment
DMC Collaboration, E. Leason, L. V. Levitin +28
Superfluid helium-3 bolometers can be utilised for dark matter direct detection searches. The extremely low heat capacity of the B phase of the superfluid helium-3 at ultra-low tem…
Dark Matter EFT Landscape Probed by QUEST-DMC
DMC Collaboration, N. Darvishi, S. Autti +27
We present the projected sensitivity to non-relativistic Effective Field Theory (EFT) operators for Dark Matter (DM) direct detection using the QUEST-DMC experiment. QUEST-DMC empl…
Magnetic Confinement of a Bubble of Supercooled He-A
Luke Whitehead, Andrew Casey, Richard P. Haley +9
We have designed and constructed a magnet surrounding a cylindrical volume of superfluid helium-3 to isolate a region of metastable, supercooled A-phase, entirely surrounded by bul…
Dark Matter Attenuation Effects: Sensitivity Ceilings for Spin-Dependent and Spin-Independent Interactions
DMC Collaboration, N. Darvishi, J. Smirnov +27
Direct detection experiments aimed at uncovering the elusive nature of dark matter (DM) have made significant progress in probing ever lower cross-sections for DM-nucleon interacti…
On-chip quantum confinement refrigeration overcoming electron-phonon heat leaks
S. Autti, J. R. Prance, M. Prunnila
Circuit-based quantum devices rely on keeping electrons at millikelvin temperatures. Improved coherence and sensitivity as well as discovering new physical phenomena motivate pursu…
Drag on Cylinders Moving in Superfluid 3He-B as the Dimension Spans the Coherence Length
S. Autti, R. P. Haley, A. Jennings +4
Vibrating probes when immersed in a fluid can provide powerful tools for characterising the surrounding medium. In superfluid 3He-B, a condensate of Cooper pairs, the dissipation a…
QUEST-DMC: Background Modelling and Resulting Heat Deposit for a Superfluid Helium-3 Bolometer
S. Autti, A. Casey, N. Eng +21
We report the results of radioactivity assays and heat leak calculations for a range of common cryogenic materials, considered for use in the QUEST-DMC superfluid 3He dark matter d…
A-B transition in superfluid He and cosmological phase transitions
Mark Hindmarsh, J. A. Sauls, Kuang Zhang +10
First order phase transitions in the very early universe are a prediction of many extensions of the Standard Model of particle physics and could provide the departure from equilibr…
Nanofluidic platform for studying the first-order phase transitions in superfluid helium-3
Petri J. Heikkinen, Nathan Eng, Lev V. Levitin +9
The symmetry-breaking first-order phase transition between superfluid phases He-A and He-B can be triggered extrinsically by ionising radiation or heterogeneous nucleation…
Long nanomechanical resonators with circular cross-section
Samuli Autti, Andrew Casey, Marie Connelly +23
Fabrication of superconducting nanomechanical resonators for quantum research, detectors and devices traditionally relies on a lithographic process, resulting in oscillators with s…
QUEST-DMC superfluid He detector for sub-GeV dark matter
S. Autti, A. Casey, N. Eng +22
The focus of dark matter searches to date has been on Weakly Interacting Massive Particles (WIMPs) in the GeV/-TeV/ mass range. The direct, indirect and collider searches…
Fundamental dissipation due to bound fermions in the zero-temperature limit
S. Autti, R. P. Haley, A. Jennings +7
The ground state of a fermionic condensate is well protected against perturbations in the presence of an isotropic gap. Regions of gap suppression, surfaces and vortex cores which…