14 research outputs found
Monolithic Active Pixel Sensors (MAPS) in a quadruple well technology for nearly 100% fill factor and full CMOS pixels
In this paper we present a novel, quadruple well process developed in a
modern 0.18mu CMOS technology called INMAPS. On top of the standard process, we
have added a deep P implant that can be used to form a deep P-well and provide
screening of N-wells from the P-doped epitaxial layer. This prevents the
collection of radiation-induced charge by unrelated N-wells, typically ones
where PMOS transistors are integrated. The design of a sensor specifically
tailored to a particle physics experiment is presented, where each 50mu pixel
has over 150 PMOS and NMOS transistors. The sensor has been fabricated in the
INMAPS process and first experimental evidence of the effectiveness of this
process on charge collection is presented, showing a significant improvement in
efficiency.Comment: 15 pages, 10 figures, submitted to "Sensors
First radiation hardness results of the TeraPixel Active Calorimeter (TPAC) sensor
The TeraPixel Active Calorimeter (TPAC) sensor is a novel Monolithic Active Pixel Sensors (MAPS) device developed for use as the active layers of a large area, digital electromagnetic calorimeter (DECAL) at a future e +e- collider. Further applications, which include the tracking and vertex systems for future lepton colliders and LHC upgrades have been proposed and it is therefore essential to characterise the behaviour of the sensor for these applications. We present the first studies of radiation hardness testing of the TPAC sensor. The performance of the sensor has been evaluated after exposures up to 5 Mrad of 50 keV x-rays. Under realistic ILC operating conditions a maximum decrease in the signal to noise ratio of 8% (15%) was observed after 200 krad (5 Mrad) which is already sufficient for proposed applications in future e+e- colliders. © 2013 IOP Publishing Ltd
Management of heart failure complicating acute coronary syndromes in Montenegro and Serbia
It is essential that context-appropriate health research and health interventions take place in countries with economy in transition. The aims of this study were to describe the clinical characteristics, management, and in-hospital outcomes of acute coronary syndrome (ACS) patients with heart failure (HF) in Montenegro and Serbia. The data of this study are a framework of the International Survey of Acute Coronary Syndromes in Transitional Countries (ISACS-TC; NCT01218776), a multi-national and multicentre registry of patients hospitalized with ACS in the European countries that emerged from the Socialist era. The present analysis focused on participants admitted to 15 hospitals in Montenegro and Serbia with a diagnosis of ACS during the period between October 2012 and August 2013. Among 1115 patients, 94 (8.4%) had an admission diagnosis of HF (Killip Class II or III). Heart failure patients were significantly older (P < 0.001). Heart failure was more frequently associated with hypertension. When compared with patients presenting without HF (Killip Class I), those with HF had lower rates of reperfusion therapy either by percutaneous coronary intervention (47.9 vs. 60.7%, P = 0.015) or by fibrinolysis (2.1 vs. 11.8%, P = 0.004). In multivariate logistic regression analysis, older age, prior coronary artery bypass graft, and ST-segment elevation myocardial infarction were the relevant predictor of HF at admission. Heart failure on admission was associated with a marked increase in mortality rates during hospitalization (13.8 vs. 3.7%, P < 0.001). After adjustment for differences in clinical characteristics, HF was still associated with higher mortality (odds ratio 2.88, 95% confidence interval 1.22-6.79, P = 0.016). Heart failure is observed in nearly 9% of patients with ACS in Serbia and Montenegro and is also associated with a significant increase in in-hospital mortality. More aggressive treatment of these patients is warranted to improve prognosi
Beam test results of FORTIS, a 4T MAPS sensor with a signal-to-noise ratio exceeding 100
We have tested the first 4T Monolithic Active Pixel Sensor (MAPS) for particle physics, FORTIS in a beam test. We have measured a signal-to-noise ratio of more than 100 for MIPs due to the excellent noise performance of the 4T architecture. Two versions of the sensor were tested; with and without deep P-well areas in-pixel. The deep P-well areas allow the incorporation of PMOS transistors inside the pixels without signal charge loss. The measured position resolutions were around 2 μm. © 2011 IOP Publishing Ltd and SISSA
Design and performance of a CMOS study sensor for a binary readout electromagnetic calorimeter
We present a study of a CMOS test sensor which has been designed, fabricated
and characterised to investigate the parameters required for a binary readout
electromagnetic calorimeter. The sensors were fabricated with several
enhancements in addition to standard CMOS processing. Detailed simulations and
experimental results of the performance of the sensor are presented. The sensor
and pixels are shown to behave in accordance with expectations and the
processing enhancements are found to be essential to achieve the performance
required.Comment: Submitted to J.Ins