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Wednesday, May 20, 2020 | History

2 edition of operation of vacuum phototriodes in non-axial magentic field found in the catalog.

operation of vacuum phototriodes in non-axial magentic field

J. E. Bateman

operation of vacuum phototriodes in non-axial magentic field

by J. E. Bateman

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  • 36 Currently reading

Published by Rutherford Appleton Laboratory in Chilton .
Written in English


Edition Notes

StatementJ.E. Bateman.
SeriesRutherford Appleton Laboratory Technical Report -- RAL-TR-1998-089
ContributionsRutherford Appleton Laboratory., Council For The Central Laboratory of The Research Councils.
ID Numbers
Open LibraryOL17859198M

The BGO endcap calorimeter was successfully operated in the CMD-2 detector at the VEPP-2M collider. It consists of BGO crystals each with a size of 25×25× mm3, arranged in two identical endcaps, with a total crystal weight of kg. The light readout used vacuum phototriodes. The endcap calorimeter has now been upgraded to work in the CMD-3 detector at new. Magnetic control of high current vacuum arcs with the aid of an axial magnetic field: A review Article in IEEE Transactions on Plasma Science 33(5) - November with 28 Reads.

A PIN diode is a diode with a wide, undoped intrinsic semiconductor region between a p-type semiconductor and an n-type semiconductor region. The p-type and n-type regions are typically heavily doped because they are used for ohmic contacts.. The wide intrinsic region is in contrast to an ordinary p–n wide intrinsic region makes the PIN diode an inferior rectifier (one typical. We describe the design and performance of a scanning tunneling microscope (STM) that operates at a base temperature of 30 mK in a vector magnetic field. The cryogenics is based on an ultra-high vacuum (UHV) top-loading wet dilution refrigerator that contains a vector magnet allowing for fields up to 9 T perpendicular and 4 T parallel to the by:

needs to work in a 4 T magnetic field with large dynamic range, high position sensitivity and low crosstalk D. Renker, PSI International Workshop on new photon-detectors, Kobe, 6/27/ Calorimeters with SiPM readout for ILC and T2K Minical for the ILC: 11 layers of 3x3 plastic scintillator tiles (50x50x5 mm 3) with 2 mm Fe in between. Principle of operation. A photodiode is a p–n junction or PIN a photon of sufficient energy strikes the diode, it creates an electron–hole pair. This mechanism is also known as the inner photoelectric the absorption occurs in the junction's depletion region, or one diffusion length away from it, these carriers are swept from the junction by the built-in electric Pin configuration: anode and cathode.


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Operation of vacuum phototriodes in non-axial magentic field by J. E. Bateman Download PDF EPUB FB2

The operation of vacuum phototriodes in non-axial magnetic field: a Monte-Carlo study By J E Bateman Topics: Detectors and Experimental TechniquesAuthor: J E Bateman. The operation of vacuum phototriodes in a non-axial magnetic field: a Monte-Carlo study.

By J E Bateman and David J A Cockerill. Abstract. The predictions of a simple monte-carlo model of the operation of vacuum phototriodes in a non-axial magnetic field are presented and compared to some available experimental measurementsAuthor: J E Bateman and David J A Cockerill.

The operation of vacuum phototriodes in a non-axial magnetic field—A Monte Carlo study,” (). The response to high magnetic fields of the vacuum phototriodes for the compact muon solenoid endcap electromagnetic calorimeter,”.

The results of tests of 1″ vacuum phototriodes in a magnetic field up to T are presented. It was found that output amplitude decreases by about 6% per tesla in the magnetic field range from to devices with an anode mesh pitch of 16 μm, the output amplitude at T is 30% lower than that at zero by: 2.

The predictions of a simple monte-carlo model of the operation of vacuum phototriodes in a non-axial magnetic field are presented and compared to some available experimental measurements. View. If the address matches an existing account you will receive an email with operation of vacuum phototriodes in non-axial magentic field book to reset your password.

The construction of the phototriode makes possible to operate in strong axial magnetic field up to 2 T. About devices of this type were manufactured.

Innew phototriode was developed for operation in axial magnetic field up to T. Inthe phototriodes for upgraded SND detector were designed. Their production is under by: 2. Vacuum interrupters with axial magnetic field contacts Vacuum is a proven switching medium with numerous advantages over alternative media, especially for medium-voltage applications.

In the past, ABB has fitted its vacuum interrupters for circuit-breakers with radial magnetic field contacts. Newly developed interrupters with axial. How about this. Take an empty box with a theoretical perfect vacuum inside it, and wrap a coil with area A and N turns around the box in the x-y plane.

Put the box in a large electromagnet and turn on the magnetic field B z in the z direction. Monitor the coil with a voltage integrator circuit (to integrate the induced Faraday Law voltage). ) The response to high magnetic fields of the vacuum phototriodes for the Compact Muon Solenoid endcap electromagnetic calorimeter By Kenneth Watson Bell, Robert M.

Brown, D.J.A. Cockerill, P.S. Flower, P.R. Hobson. The operation of vacuum phototriodes in a non-axial magnetic field - a Monte Carlo study” To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.

The relative gain of VPTs in magnetic fields of 2–4 T for a number of photodevices ( in PNPI) shows some spread of the gain values in the range of the tilt angles θ = 5 –25° or η = – up to 10%.

A similar effect at a magnetic field of B = T was explained by the UK group as an influence of the VPT fine-mesh plane rotation around the symmetry axis of the by: 4. demonstrated that vacuum phototriodes, with a gain of about 10 at 15° to a magnetic field of 4T can be commercially produced in quantity.

These new devices are superior in many respects to those previously obtainable, notably in having high gain at high magnetic field strength, radiation tolerance, and stability at large photocurrents. A New Contact Design Based on a Quadrupolar Axial Magnetic Field and its Characteristics H.

Fink, M. Heimbach, W. Shang Abstract Axial magnetic field (AMF) contacts are applied within vacuum interrupters especially in case of high short-cir-cuit current.

In this paper a new AMF contact design based on a quadrupolar field arrangement and its charac. The endcap electromagnetic calorimeter of the compact muon solenoid detects particles with the dense fast scintillator lead tungstate (PbWO4). Due to Cited by: 6. Charge sensitive preamplifiers are placed directly on the phototriodes for the best noise performance.

The calorimeter was installed during the last year. Calibration by cosmic rays showed the energy equivalent of the electronic noise to be about MeV during operation in a 1 T magnetic field which corresponds to the design by: 7.

Read the latest articles of Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment atElsevier’s leading platform of peer-reviewed scholarly literature.

The stronger and now digitized electrical signals are then whisked away through optic fibres. Because the photodetectors also need to be radiation hard and operate within a strong magnetic field, those chosen were avalanche photodiodes or APDs [see explanation below] for the crystal barrel, and vacuum phototriodes (VPTs) for the endcaps.

Explaining Magnetic Separation Rotary Magnetic Separators, such as the Bunting Drum Magnet and Magnetic Separation Pulley, are designed with a specific type of magnetic field. The type of magnetic field has to be considered when looking at any application and when deciding which design will achieve a customer’s separation objective.

So what is an Axial or. The operation and general performance of the CMS electromagnetic calorimeter using cosmic-ray muons are described. These muons were recorded after the closure of the CMS detector in late R.M. Brown The variation in response of the CMS ECAL vacuum phototriodes as a function of orientation in a strong magnetic field, Author: CMS Collaboration.

The reason of changing a photosensitive device is a strong non-uniform magnetic field in the endcap calorimeter volume making the operation of the vacuum photosensitive devices impossible.effect is a phenomenon in which when light strikes a metal or semiconductor placed in a vacuum, electrons are emitted from its surface into the vacuum.

Photomultiplier tubes (often abbreviated as PMT) make use of this external photoelectric effect and are superior in response speed and sensitivity (low-light-level detection).In operation, the instrument is first rotated until the magnetic field of the Earth, indicated by the compass needle, is parallel with the plane of the coil.

Then the unknown current is applied to the coil. This creates a second magnetic field on the axis of the coil, perpendicular to the Earth's magnetic field.