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CAGE: An Internal Source Scanning Cryostat for HPGe Characterization
G. Othman, C. Wiseman, T. H. Burritt, J. A. Detwiler, M. P. Held, R. Henning, T. Mathew, D. Peterson, W. Pettus, G. Song, T. D. Van Wechel
https://arxiv.org/abs/2602.06289 https://arxiv.org/pdf/2602.06289 https://arxiv.org/html/2602.06289
arXiv:2602.06289v1 Announce Type: new
Abstract: The success of current and future-generation neutrinoless double beta decay experiments relies on the ability to eliminate or reduce extraneous backgrounds. In addition to constructing experiments using radiopure materials and handling in underground laboratories, it is necessary to understand and reduce known backgrounds in data analysis. The Large Enriched Germanium Experiment for Neutrinoless double beta Decay is searching for this decay using 76Ge-enriched high-purity germanium detectors submerged in an active liquid argon veto. A significant background in LEGEND is surface events from shallowly-impinging radiation on detector surfaces. In this paper we introduce the Collimated Alphas, Gammas, and Electrons (CAGE) scanning system, an internal-source scanning vacuum cryostat, designed to perform studies of surface events on sensitive surfaces of HPGe in a surface-lab. CAGE features a collimated radionuclide source inside a movable infrared shield that is able to perform precision scans of detector surfaces by utilizing three independent motor stages for source positioning. This allows detailed studies of pulse shapes as a function of source position and incident angle, where defining features can be extracted and exploited for removing surface backgrounds in data analysis in LEGEND. In this paper, we describe CAGE and demonstrate its performance with a commissioning run with 241Am. The commissioning run was completed with the source at normal incidence, and we estimate a beam spot precision of 3.1 mm, which includes positioning uncertainties and the beam-spot size. Using the 59.5 keV gamma population from 241Am, we show that low-energy photon events near the passivated surface feature risetimes that increase with radial distance from the detector center. We suggest a specific metric that can be used to discriminate low-energy gamma backgrounds in LEGEND with similar characteristics.
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Bristol Myers Squibb, an industry stalwart in need of a hit, is betting a pill called Cobenfy can become the first approved medicine for the millions of Americans diagnosed with psychosis related to Alzheimer’s disease.
That case rests almost entirely on a single clinical trial, conducted before the DVD was invented, in which its striking benefits were derailed by damning side effects.
Later this year, Bristol will get the results from three pivotal studies designed to make good …

Why Bristol Myers Squibb believes a decades-old drug can treat Alzheimer’s 
Why Bristol Myers Squibb is banking on a decades-old drug to help secure its future.

Beam Test Performance of AstroPix sensor with 120 GeV protons
Bobae Kim, Regina Caputo, Manoj Jadhav, Sylvester Joosten, Carolyn Kierans, Henry Klest, Adrien Laviron, Richard Leys, Jessica Metcalfe, Jared Richards, Nicolas Striebig, Amanda L. Steinhebel, Daniel Violette, Maria Zurek
https://arxiv.org/abs/2602.06084 https://arxiv.org/pdf/2602.06084 https://arxiv.org/html/2602.06084
arXiv:2602.06084v1 Announce Type: new
Abstract: AstroPix is a high-voltage CMOS (HV-CMOS) monolithic active pixel sensor (MAPS) developed for precision gamma-ray imaging and spectroscopy in the medium energy regime, as well as for precise shower imaging and tracking in the Barrel Imaging Calorimeter (BIC) of the Electron Proton/Ion Collider (ePIC) detector at the future Electron-Ion Collider (EIC). We present beam test results of the AstroPix v3 sensor using a 120 GeV proton beam at the Fermilab Test Beam Facility (FTBF), performed as part of the broader experimental campaign for the BIC prototype calorimeter. The sensor's 500 um pixel pitch enabled precise measurement of the beam profile, providing important information for calorimeter performance studies. Using the measured 120 GeV proton data, we measure the energy deposit of minimum ionizing particles and use them to extract the corresponding effective depletion depth.
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"We don’t really think about our future – we remember it",
said Dr Hal Hershfield, who studies how humans think about time and how that influences our emotions and behaviors.
When we daydream or envision ourselves at a later point, we essentially create a memory.
We then use these memories to construct our ideas about the future.
This process is called “episodic future thinking”;
it supports our decision-making, emotional regulation and ability to p…