The CLEO III SILICON MICROVERTEX DETECTOR

The upgrade of the CLEO detector has finished with the installation of the new silicon detector in February 2000. The detector is a four layer barrel-style device with double-sided silicon detectors. It spans the radial distance from 2.5 cm to 10.2 cm and cover 93% of the solid angle surrounding the interaction region. The innermost layer is 16 cm, the outermost is 55 cm long. Important features of the new design are a very small radiation length of the detector material and new front-end electronics to deal with the capacitive load of the long silicon wafer chains. First results of the detector performance will be presented.

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Resistive AC-Coupled Silicon Detectors: Principles of operation and first results from a combined analysis of beam test and laser data

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2021.165319 ◽

2021 ◽

Vol 1003 ◽

pp. 165319

Author(s):

M. Tornago ◽

R. Arcidiacono ◽

N. Cartiglia ◽

M. Costa ◽

M. Ferrero ◽

...

Keyword(s):

Silicon Detectors ◽

Beam Test ◽

Combined Analysis ◽

Laser Data ◽

First Results

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Measurement of ionization loss of 50 GeV protons in silicon with smoothly tunable up to 1 cm thickness using a single flat detector

Journal of Instrumentation ◽

10.1088/1748-0221/17/01/p01015 ◽

2022 ◽

Vol 17 (01) ◽

pp. P01015

Author(s):

R.M. Nazhmudinov ◽

A.V. Shchagin ◽

A.S. Kubankin ◽

A.G. Afonin ◽

G.I. Britvich ◽

...

Keyword(s):

Theoretical Calculations ◽

Silicon Detector ◽

Incident Beam ◽

High Energy ◽

Silicon Detectors ◽

Arbitrary Angle ◽

Ionization Loss ◽

Flat Detector ◽

High Energy Particles ◽

Relativistic Particles

Abstract Research of the ionization loss of 50 GeV protons, the path of which in the depleted layer of the silicon detector was smoothly regulated in the range from 0.3 to 10 mm, is presented. In the experiment, we used a flat silicon detector with a fixed thickness of the depleted layer of 300 μm. The smooth regulation of the path was realized due to the variation of the angle between the surface of the detector and the incident proton beam. The comparison of experimental data and theoretical calculations of the ionization loss demonstrates agreement in all range of thicknesses. Results of the research can be used in order to control the angle between the surface of the detector and the incident beam of relativistic particles. Besides, the results can be used in the analysis of data from astrophysical silicon detectors of charged particles if high-energy particles crossed flat detectors at arbitrary angle.

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The Magellanic Edges Survey I: Description and first results

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/staa2048 ◽

2020 ◽

Vol 497 (3) ◽

pp. 3055-3075

Author(s):

L R Cullinane ◽

A D Mackey ◽

G S Da Costa ◽

S E Koposov ◽

V Belokurov ◽

...

Keyword(s):

Target Selection ◽

Radial Distance ◽

Large Magellanic Cloud ◽

Disc Model ◽

Observation Strategy ◽

First Results ◽

Mass Estimate ◽

Red Clump ◽

Red Giant ◽

Giant Branch Stars

ABSTRACT We present an overview of, and first science results from, the Magellanic Edges Survey (MagES), an ongoing spectroscopic survey mapping the kinematics of red clump and red giant branch stars in the highly substructured periphery of the Magellanic Clouds. In conjunction with Gaia astrometry, MagES yields a sample of ~7000 stars with individual 3D velocities that probes larger galactocentric radii than most previous studies. We outline our target selection, observation strategy, data reduction, and analysis procedures, and present results for two fields in the northern outskirts (>10° on-sky from the centre) of the Large Magellanic Cloud (LMC). One field, located in the vicinity of an arm-like overdensity, displays apparent signatures of perturbation away from an equilibrium disc model. This includes a large radial velocity dispersion in the LMC disc plane, and an asymmetric line-of-sight velocity distribution indicative of motions vertically out of the disc plane for some stars. The second field reveals 3D kinematics consistent with an equilibrium disc, and yields Vcirc = 87.7 ± 8.0 km s−1 at a radial distance of ~10.5 kpc from the LMC centre. This leads to an enclosed mass estimate for the LMC at this radius of (1.8 ± 0.3) × 1010 M⊙.

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