Tootfinder

ByteDance releases Doubao 2.0 for the "agent era", joining other Chinese firms hoping to generate buzz around their AI models during the Lunar New Year holiday (Eduardo Baptista/Reuters)
https://www.reuters.com/world/asia-pacific

A labor-led coalition plans a protest outside the Edward J. Schwartz Federal Building Thursday to "demand an end to the bloodshed and inhumane treatment of immigrants by" Immigrations and Customs Enforcement.
The coalition gathers outside the federal building every Thursday, but the protest comes one day after the fatal shooting of a 37-year-old woman by an ICE officer in an immigration-related operation in Minneapolis.
"Protesters in San Diego are calling for an end…

Protest planned at downtown federal building following Minneapolis ICE shooting
A labor-led coalition plans a protest outside the Edward J. Schwartz Federal Building today to "demand an end to the bloodshed and inhumane treatment of immigrants by" Immigrations and Customs Enforcement.

Development and characterization of hybrid MCP-PMT with embedded Timepix4 ASIC used as pixelated anode
Riccardo Bolzonella, Jerome Alozy, Rafael Ballabriga, Nicol\`o Vladi Biesuz, Michael Campbell, Viola Cavallini, Angelo Cotta Ramusino, Massimiliano Fiorini, Edoardo Franzoso, Marco Guarise, Xavi Llopart Cudie, Gabriele Romolini, Alessandro Saputi
https://arxiv.org/abs/2602.01886 https://arxiv.org/pdf/2602.01886 https://arxiv.org/html/2602.01886
arXiv:2602.01886v1 Announce Type: new
Abstract: We present a novel single-photon detector based on a vacuum tube incorporating a photocathode, a microchannel plate (MCP), and a Timepix4 CMOS ASIC functioning as a pixelated anode. Designed to handle photon rates up to 1 billion per second across a 7 cm$^2$ active area, the detector achieves outstanding spatial and temporal resolutions of 5-10 $\mu$m and below 50 ps r.m.s., respectively.
The Timepix4 ASIC comprises approximately 230,000 pixels, each integrating analog and digital front-end electronics. This enables data-driven acquisition and supports data transmission rates up to 160 Gb/s. External FPGA-based electronics manage both configuration and readout.
In order to test the timing performance of the Timepix4 ASIC we performed preliminary characterization of an assembly bonded to a 100 $\mu$m thick n-on-p silicon sensor using a pulsed infrared laser, which demonstrated a per-pixel timing resolution of 110 ps, with cluster-based averaging methods improving to below 50 ps.
Six prototype detectors incorporating different MCP stack configurations and end-spoiling depths were produced by Hamamatsu Photonics. We report on their characterization, including dark count rates, gain, and spatial and timing resolutions, assessed both in laboratory conditions and during a test-beam campaign at CERN's SPS facility.
toXiv_bot_toot