2,844 research outputs found
Module Testing for the CMS Forward Pixel Detector
The Forward Pixel Detector for the CMS Experiment consists of four disks. In total 672 modules are needed to assemble the disks. This translates into 18 million readout channels that need to be tested for their correct functionality making this task extremely challenging. This paper will present the procedure for testing these modules
The CMS Forward Pixel Detector
At the core of CMS all-silicon tracker is the pixel detector. It provides fine granularity for charged track reconstruction with three-dimensional space measurements with resolutions on the order of ten microns. It is comprised of two parts ? the barrel detector and the forward disks. The disks are called the Forward Pixel detector and are being assembled at Fermilab, U.S.A. The detector modules for the disks consist of eighteen million pixels and the production begins in summer of 2006. The designs and the present status of the detector are reviewed here
An outlook of the user support model to educate the users community at the CMS Experiment
The CMS (Compact Muon Solenoid) experiment is one of the two large
general-purpose particle physics detectors built at the LHC (Large Hadron
Collider) at CERN in Geneva, Switzerland. The diverse collaboration combined
with a highly distributed computing environment and Petabytes/year of data
being collected makes CMS unlike any other High Energy Physics collaborations
before. This presents new challenges to educate and bring users, coming from
different cultural, linguistics and social backgrounds, up to speed to
contribute to the physics analysis. CMS has been able to deal with this new
paradigm by deploying a user support structure model that uses collaborative
tools to educate about software, computing an physics tools specific to CMS. To
carry out the user support mission worldwide, an LHC Physics Centre (LPC) was
created few years back at Fermilab as a hub for US physicists. The LPC serves
as a "brick and mortar" location for physics excellence for the CMS physicists
where graduate and postgraduate scientists can find experts in all aspects of
data analysis and learn via tutorials, workshops, conferences and gatherings.
Following the huge success of LPC, a centre at CERN itself called LHC Physics
Centre at CERN (LPCC) and Terascale Analysis Centre at DESY have been created
with similar goals. The CMS user support model would also facilitate in making
the non-CMS scientific community learn about CMS physics. A good example of
this is the effort by HEP experiments, including CMS, to focus on data
preservation efforts. In order to facilitate its use by the future scientific
community, who may want to re-visit our data, and re-analyze it, CMS is
evaluating the resources required. A detailed, good quality and well-maintained
documentation by the user support group about the CMS computing and software
may go a long way to help in this endeavour.Comment: 9 pages, 2 figure
Summary Report of the Topical Group on Physics Education, Community Engagement Frontier (CEF4/CommF4) Snowmass 2021
An essential companion to the development and advancement of the field of
Particle Physics is a strong program in physics education at all levels, that
can attract entry level students across the full demographic spectrum and
provide them with the education, training and skills needed to advance to
successful careers in Science, Technology, Engineering and Mathematics (STEM)
and other fields. This report summarizes the work of several investigative
teams that have reviewed and assessed current opportunities in physics
education across K-12, undergraduate, graduate and postdoctoral domains,
including national and international linkages. From these assessments,
recommendations have been put forward aimed to innovate educationally in
strategic ways to strengthen ties between the research community and teachers,
between the academic community and the private sector, and through both
domestic and international connections.Comment: 9 pages, 1 figur
COVID-19 pneumonia and mucormycosis a new challenging duo- rhino-occulo-cerebral mucormycosis: a case report
The pandemic of corona virus disease 2019 (COVID-19) has posed challenge not only in management of the primary disease but the emerging complications associated with COVID-19 has further complicated the course of disease. The course of COVID-19 disease is associated with infectious and noninfectious complications former include secondary bacterial and fungal infection adding to mortality and morbidity. COVID-19 disease associated candidiasis and aspergillosis have been reported as super infections but with the steroid and supplemental oxygen as mainstay treatment modality mucormycosis is now complicating the course of disease and presently posing challenge in India with already overburdened health care service. Mucorales is a saphrophytic fungi causes rhinocerebral infection involving nasal passages, sinuses, oral cavity and brain. It is usually seen in immunocompromised host and in diabetics with poorly controlled blood sugar level. High degree of clinical suspicion is needed to suspect and diagnose mucormycosis. It is a fatal disease because of its angioinvasive pathogenesis and treatment is promptly initiated to salvage mortality and morbidity. Authors report a case of rhino-oculo-cerebral mucormycosis in a middle-aged diabetic patient with severe COVID-19 disease
Performance analysis of InAlN/GaN HEMT and optimization for high frequency applications
An InAlN/GaN HEMT device was studied using extensive temperature dependent DC
IV measurements and CV measurements. Barrier traps in the InAlN layer were
characterized using transient analysis. Forward gate current was modelled using
analytical equations. RF performance of the device was also studied and device
parameters were extracted following small signal equivalent circuit model.
Extensive simulations in Silvaco TCAD were also carried out by varying stem
height, gate length and incorporating back barrier to optimize the suitability
of this device in Ku-band by reducing the detrimental Short Channel Effects
(SCEs). In this paper a novel structure i.e., a short length T gate with
recess, on thin GaN buffer to achieve high cut-off frequency (f) and high
maximum oscillating frequency (f) apt for Ku-band applications is also
proposed
Evidence for Simultaneous Production of J/ψ and ϒ Mesons
We report evidence for the simultaneous production of J/ψ and ϒ mesons in 8.1 fb−1 of data collected at √s = 1.96 TeV by the D0 experiment at the Fermilab p¯p Tevatron Collider. Events with these characteristics are expected to be produced predominantly by gluon-gluon interactions. In this analysis, we extract the effective cross section characterizing the initial parton spatial distribution, σeff = 2.2 ± 0.7(stat) ± 0.9(syst) mb
Wy Production and Limits on Anomalous WWy Couplings in pp̅ Collisions √s = 1.96 TeV
We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W(→ lv) + y production in ey and µy final states. Using data corresponding to an integrated luminosity of 4.2 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider, the measured cross section times branching fraction for the process pp̅ → Wy + X → lvy + X and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model. These results provide the most stringent limits on anomalous WW[1] couplings for data from hadron colliders: -0.4 \u3c ∆ky \u3c 0.4 and -0.08 \u3c λy \u3c 0.07 at the 95% C.L
Wy Production and Limits on Anomalous WWy Couplings in pp̅ Collisions √s = 1.96 TeV
We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W(→ lv) + y production in ey and µy final states. Using data corresponding to an integrated luminosity of 4.2 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider, the measured cross section times branching fraction for the process pp̅ → Wy + X → lvy + X and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model. These results provide the most stringent limits on anomalous WW[1] couplings for data from hadron colliders: -0.4 \u3c ∆ky \u3c 0.4 and -0.08 \u3c λy \u3c 0.07 at the 95% C.L
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