A miniature version of ICAL experiment at the India-based Neutrino Observatory, mini-ICAL is running at Madurai, India. A Cosmic Muon Veto detector on top of mini-ICAL is going to be made with extruded plastic scintillators with embedded WLS fibers to propagate light and SiPM as photon transducers. A test setup is built to characterise the SiPM along with the muon detection efficiency of the...
As a precursor to setting up a Dark Matter (DM) direct search experiment involving scintillators at low temperatures, we have investigated the change in characteristic properties of the photon readout channel. Silicon Photomultiplier (SiPM), known for its high gain, miniature size, and low mass was studied. Leakage current of SiPM was found to have sensitive dependence on the temperature and...
This manuscript aims to use two ultra-fast photomultiplier tubes (FPMT) coupled with Lu1.8Y2SiO5:Ce (LYSO) crystals to perform a coincidence time resolution (CTR) test applied to Time of Flight- Positron Emission Tomography (TOF-PET). The FPMT used in this work refers to a Micro Channel Plate-PMT(MCP-PMT) with rise time of 100ps, TTS of 46ps in a single photon mode. The scintillation light...
The transit time spread timing performance reported for Large Area Picosecond Photo Detector (LAPPD™) is often limited by the speed of cost-effective readout electronics, rather than the actual timing of the detector device itself. In this paper, an electronic board is presented that integrates a high-speed low-cost waveform sampling ASIC directly onto readout boards that can be located at the...
We will be using approximately 500 multi-PMTs (mPMTs) as the photosensors for the Intermediate Water Cherenkov Detector (IWCD), a new near detector for the approved Hyper-Kamiodande experiment that will be built by 2025. The IWCD mPMT design has nineteen 3" PMTs enclosed in a water-tight pressure vessel, along with the associated electronics. The 3" PMTs provide excellent spatial imaging of...
Photomultipliers (PMTs) are widely used in scintillation and Cherenkov detectors for their great performances on photon detection. For example, the Jiangmen Underground Neutrino Observatory (JUNO) will use ~18,000 20-inch PMTs in its central detector to achieve an unprecedented energy resolution of 3%/√(E(MeV)). A key parameter of PMT is its detection efficiency (DE), which will be strongly...
New compact PMT have rate capability >300MHz, able to survive ~GigaRad radiation doses, and time resolution <50 ps. This study investigates high gain quartz window metal envelope compact multi-anode photomultipliers as direct in-situ light and particle sensors. In addition to the Cerenkov light generated in the quartz window (or as coupled to Cerenkov or scintillator tiles), the...
The Silicon Geiger Hybrid Tube (SiGHT) is a novel photosensor designed for future generations of rare event search experiments using noble liquids. The idea is to replace conventional multi-dynode photomultiplier tubes (PMTs) with a hybrid technology, consisting of a low temperature sensitive bi-alkali photocathode for conversion of photons into photoelectrons and a low dark count Silicon...
Pixel detectors are an integral part of medical imaging, particle physics, and many other research areas. Sensors are made from various types of materials such as GaAs, Si, CdTe. Current research tends to use CdTe as X-ray sensors due to its high absorption coefficient in the X-ray spectrum. With decreasing size of pixels, charge diffusion causes charge sharing between neighboring pixels. That...
The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose neutrino experiment. The primary physics goal of JUNO is determination of the neutrino mass ordering by detecting the reactor antineutrinos. There will be 20000 20-inch PMTs equipped for JUNO, including 15000 MCP PMTs from NNVT company and 5000 dynode PMTs from Hamamatsu company. To achieve the designed energy resolution...
We studied the performance of a MCP-PMT with $2\times2$ matrix anode pixels fabricated by Xi'an Institute of optics and precision mechanics of CAS. The test result shows that the gain of the MCP-PMT remains stable up to $1\times10^{7}$. And the time resolution of single photoelectron (SPE) is better than 60ps ($\sigma$). The Cross-talk phenomenon among adjacent pixels which deteriorates the...
Super-Kamiokande (Super-K) is a neutrino detector located in Japan. Its research program includes search for proton decay and measurement of neutrino oscillations among others. It contains ~11,000 20 inches photomultiplier tubes (PMTs) surrounding a massive tank filled with 50 ktonne of ultra-pure water. A detailed understanding of the PMTs and their response to environmental effects, is...
Abstract: Micro-channel plate photomultiplier tube (MCP-PMT) is a kind of photosensitive device with single photon detection capability and great time resolution, which is also called Fast-PMT (FPMT). The MCP is the electron multiplier structure and in order to achieve single photon detection, two layers of MCPs are always used together. Due to the new-generation particle accelerators with...
The large scalar neutrino detectors (JUNO, HyperK), need the 20 inch area PMTs as the photo-detection device for their large photocathode coverage and less electronic channels. In 2009, the researchers at IHEP have conceived a new concept of large area PMTs, of which the small MCP units replace the bulky Dynode chain. After several years R&D, the 20 inch MCP-PMT was successfully produced. This...
