Conveners
RDC 2 Photodetectors: VUV & large-area photon detection for noble liquids
- F. Cavanna (Fermi National Accelerator Laboratory)
- Jonathan Asaadi (University of Texas at Arlington)
- Shiva Abbaszadeh (University of California, Santa Cruz)
RDC 2 Photodetectors: Novel photoconductors (a-Se) & low-noise solid-state imagers
- Shiva Abbaszadeh (University of California, Santa Cruz)
- Flavio Cavanna (Fermi National Accelerator Lab)
RDC 2 Photodetectors: Fast timing, photon sorting & imaging
- Shiva Abbaszadeh (University of California, Santa Cruz)
- Flavio Cavanna (Fermi National Accelerator Laboratory)
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Flavio Cavanna (Fermi National Accelerator Lab. (US)), Wei Shi (Brookhaven National Laboratory)21/10/2026, 14:00RDC 2 PhotodectorsPresentation
In this talk, we present an ongoing development for the next generation of fully packaged digital photodetectors based on a light-trapping mechanism called DELTA, Digital End-to-end Light Trap Assembly. The end-to-end development covers incident photons up to the digital signals saved to disk. DELTA is both a class of photodetectors, each tailored to its specific application within a common...
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R. F. Razakamiandra (Stony Brook University)21/10/2026, 14:20RDC 2 PhotodectorsPresentation
Next-generation noble-element experiments in neutrino and dark matter physics will need photodetector systems with vacuum ultraviolet (VUV) sensitivity covering thousands of square meters. Vacuum deposition is the current standard for wavelength-shifting (WLS) coatings, but its throughput, labor cost, and chamber size limits make it hard to scale to that level. Solvent-based coating offers a...
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Matteo Vicenzi (Brookhaven National Laboratory (US))21/10/2026, 14:40RDC 2 PhotodectorsPresentation
DUNE's Phase-II Far Detector 3 (FD3) will need about 2,000 m² of pTP wavelength-shifting coating for its X-ARAPUCA photon detectors, far beyond what Phase-I in-house deposition can deliver on schedule. We present R&D on outsourcing pTP deposition to an industrial vendor using physical vapor deposition. Coatings on FD2-size substrates reach the 1–2 µm target with less than 10% thickness...
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Jairo H Rodriguez Rondon (South Dakota School of Mines and Technology)21/10/2026, 15:00RDC 2 PhotodectorsPresentation
Power-over-Fiber (PoF) technology provides an alternative solution for delivering electrical power to electronics operating in harsh environments with high-voltage isolation requirements or electromagnetic interference. Recently, the novel application of PoF technology was successfully demonstrated for powering the Photon Detection System (PDS) of DUNE prototypes at CERN. Lessons learned from...
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Edryd van Bruggen (University of Massachusetts)21/10/2026, 15:20RDC 2 PhotodectorsPresentation
Efficient detection of 178 nm vacuum ultraviolet (VUV) scintillation light is essential for next-generation xenon-based rare-event detectors. One such detector is nEXO, a 5-tonne liquid xenon (LXe) time-projection chamber enriched to 90% Xe-136, designed to search for neutrinoless double beta (0νββ) decay with a projected half-life sensitivity of 1.35×10²⁸ years over a 10-year lifespan....
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Varghese Anto Chirayath (University of Texas at Arlington)21/10/2026, 15:401RDC 2 PhotodectorsPresentation
Amorphous selenium (a-Se) offers direct detection of vacuum-ultraviolet (VUV) scintillation photons produced in cryogenic noble-element detectors. We present recent advances in the development of a-Se based VUV photodetectors at the University of Texas at Arlington. Our group has demonstrated direct response of a-Se photodetectors at 130 nm and low-light (~200 photons) performance at 401 nm...
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Mr Teo Schnell21/10/2026, 16:301RDC 2 PhotodectorsPresentation
Staircase avalanche photodetectors have been shown to exhibit reduced noise, controlled gain, and enhanced signal amplification compared to standard avalanche photodetectors. Devices fabricated from superlattices of amorphous selenium and arsenic selenide have demonstrated linear multiplicative behavior through quantum tunneling based on the number of layers employed, allowing for specific...
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Agustin Lapi (University of Chicago), CLAUDIO CHAVEZ (Fermi National Accelerator Laboratory)21/10/2026, 16:47RDC 2 PhotodectorsPresentation
Skipper-CMOS technology merges the non-destructive readout capabilities of Skipper-CCDs with the scalability of monolithic CMOS integration. Each pixel includes a floating gate, a charge-coupled transfer structure, and a pinned photodiode, enabling sub-electron noise through multiple non-destructive samples. Earlier work demonstrated sub-electron noise at the single-pixel and matrix level but...
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Agustin Lapi (University of Chicago)21/10/2026, 17:04RDC 2 PhotodectorsPresentation
The Multiple Amplifier Sensing CCD (MAS-CCD) is a low-noise silicon imager designed to reduce the readout time required to reach the single-photon counting regime by distributing non-destructive charge measurements across multiple Skipper output stages. The MAS architecture, however, rapidly increases the number of video channels that must be instrumented, creating a significant scalability...
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Blas Irigoyen Gimenez (Fermi National Accelerator Laboratory)21/10/2026, 17:211RDC 2 PhotodectorsPresentation
This work reports results aimed at enhancing the signal-to-noise ratio (SNR) of Skipper-CCD for astronomical applications. Results on the implementation of a backside processing for fully depleted Skipper CCDs using arsenic ion implantation and microwave annealing for back contact formation and activation are presented. Simulations and experimental progress to date will be presented. This...
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EMI TAMURA (Brookhaven National Laboratory)21/10/2026, 17:38RDC 2 PhotodectorsPresentation
The Stage-5 Spectroscopic Experiment (Spec-S5) aims to extend spectroscopic observations into the short-wavelength infrared, enabling measurements of galaxies at redshifts beyond the reach of silicon detectors. Germanium charge-coupled devices (Ge-CCDs) are a candidate technology for this infrared channel because germanium remains sensitive at wavelengths beyond the approximately 1.1 $\mu$m...
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Prashansa Mukim (Brookhaven National Laboratory)21/10/2026, 17:56RDC 2 PhotodectorsPresentation
Advanced sensors and readout electronics used in high-energy physics experiments increasingly operate in large, strongly coupled parameter spaces, making characterization, calibration, and performance optimization a growing bottleneck for instrumentation development. Bayesian optimization applied to charge-coupled devices (CCDs) has already shown promise for addressing this challenge by using...
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Bob Azmoun (Brookhaven National Laboratory)22/10/2026, 16:30RDC 2 PhotodectorsPresentation
High-Rate Picosecond Photodetectors (HRPPDs) are the latest generation microchannel plate (MCP)-based photodetectors offered by Incom Inc. They feature a large active area (104 mm × 104 mm) and a low profile (1.4 cm thick), up to $10^7$ gain (enabling single photon detection), sub-millimeter position resolution, and a timing resolution approaching a few tens of picoseconds. This...
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Lu Ren (University of Colorado Boulder (US))22/10/2026, 16:50RDC 2 PhotodectorsPresentation
Eos is a 20-tonne optical detector located at the University of California, Berkeley, with the primary goal of demonstrating the hybrid Cherenkov and scintillation light detection technique. The Eos detector features ultra-fast photomultiplier tubes, photon-sorting dichroicons, a four-tonne inner target volume, and a suite of optical and radioactive calibration sources. Eos data-taking started...
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Samuel Naugle (UC Berkeley)22/10/2026, 17:10RDC 2 PhotodectorsPresentation
Photon detection has proved to be an indispensable tool for neutrino detectors,
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which typically detect numbers of photons and their arrival times.
Photons also carry information about an event through their wavelength, polarization, and
direction, but often little to none of this information is utilized.
The "dichroicon," a Winston-style light cone comprised of dichroic filters,
allows... -
Dr Jingke Xu (Lawrence Livermore National Laboratory, USA)22/10/2026, 17:30RDC 2 PhotodectorsPresentation
Scintillation detectors are widely used in high-energy physics experiments. 3D position sensitivity of these detectors can significantly expand their applications. Inspired by plenoptic cameras, we designed a prototype system optimized for optical imaging under photon-limited conditions. We calibrated the system using a tunable light source at precisely controlled positions. The resulting...
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Madeleine Carhart (University of Washington)22/10/2026, 17:50RDC 2 PhotodectorsPresentation
DPHaSE (Dielectric Powder Haloscope SNSPD Experiment) is a broadband axion and dark photon search targeting QCD axion-photon couplings in the 10 meV-eV mass range. The haloscope makes use of dark matter to photon conversion on the surface of disordered dielectric powder, with conversion rate proportional to surface area. To achieve sensitivity in this mass range, our dielectric haloscope...
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James Sinnis (University of Washington)22/10/2026, 18:10RDC 2 PhotodectorsPresentation
The Orpheus experiment has conducted its first search for axions in the mass range 65.3 μeV to 69.3 μeV. This talk will contain a description of the experiment and the results of this search. The haloscope serves as a proof-of-concept of this unique haloscope design, which employs dielectric plates spaced periodically within a resonant cavity. Its peculiar advantages will be discussed...
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Riya Rai (McGill University)RDC 2 PhotodectorsPresentation
Liquid xenon (LXe) detectors rely on sensing vacuum-ultraviolet (VUV) scintillation light to reconstruct particle interactions with high energy and spatial resolution. Photodetectors for these applications require high gain, high photon detection efficiency (PDE) at VUV wavelengths, low operating voltage, and low dark count rate (DCR). For rare event searches, in particular the search for...
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