CMS Hadron Forward Calorimeter Phase I Upgrade Status

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The Hadron Forward Calorimeter of CMS is going through a complete Phase I upgrade. The current photomultiplier tubes (PMTs) are being replaced with thinner window, higher quantum efficiency, four-anode photomultiplier tubes. The new PMTs will provide better light detection performance, a significant...

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Autor principal: Onel, Yasar
Lenguaje:eng
Publicado: 2014
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1088/1742-6596/587/1/012007
http://cds.cern.ch/record/1702273
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author Onel, Yasar
author_facet Onel, Yasar
author_sort Onel, Yasar
collection CERN
description The Hadron Forward Calorimeter of CMS is going through a complete Phase I upgrade. The current photomultiplier tubes (PMTs) are being replaced with thinner window, higher quantum efficiency, four-anode photomultiplier tubes. The new PMTs will provide better light detection performance, a significantly reduced background and unique handles to recover the signal in the presence of background. This report will describe the nature of the essential upgrade elements with supporting beam test results and the status of the upgrade progression.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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spelling cern-17022732022-08-10T13:05:27Zdoi:10.1088/1742-6596/587/1/012007http://cds.cern.ch/record/1702273engOnel, YasarCMS Hadron Forward Calorimeter Phase I Upgrade StatusDetectors and Experimental TechniquesThe Hadron Forward Calorimeter of CMS is going through a complete Phase I upgrade. The current photomultiplier tubes (PMTs) are being replaced with thinner window, higher quantum efficiency, four-anode photomultiplier tubes. The new PMTs will provide better light detection performance, a significantly reduced background and unique handles to recover the signal in the presence of background. This report will describe the nature of the essential upgrade elements with supporting beam test results and the status of the upgrade progression.The CMS Hadronic Forward Calorimeter has undergone upgrade maintenance during the LHC Long Shutdown 1. The Hamamatsu R7525 PMTs have been replaced with Hamamatsu R7600U-200-M4 PMTs, which have thinner window glass that reduces window- hit events. The R7600 PMTs also have multi-anode readout feature to further enable discrimination of window-hits while also allowing the recovery of true signal energy. Higher quantum efficiency of the R7600 PMTs improves calorimeter resolution. The new PMTs were tested and calibrated, new PMT baseboards were designed and tested, and can be configured to readout 1, 2, or 4 anodes of the R7600. New radiation hard (100Gy) QIE front-end electronics were designed for reading out the new PMTs and include a TDC with < 800ps resolution. New back-end electronics based on the microTCA industrial standard have been tested.CMS-CR-2014-075oai:cds.cern.ch:17022732014-05-14
spellingShingle Detectors and Experimental Techniques
Onel, Yasar
CMS Hadron Forward Calorimeter Phase I Upgrade Status
title CMS Hadron Forward Calorimeter Phase I Upgrade Status
title_full CMS Hadron Forward Calorimeter Phase I Upgrade Status
title_fullStr CMS Hadron Forward Calorimeter Phase I Upgrade Status
title_full_unstemmed CMS Hadron Forward Calorimeter Phase I Upgrade Status
title_short CMS Hadron Forward Calorimeter Phase I Upgrade Status
title_sort cms hadron forward calorimeter phase i upgrade status
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1088/1742-6596/587/1/012007
http://cds.cern.ch/record/1702273
work_keys_str_mv AT onelyasar cmshadronforwardcalorimeterphaseiupgradestatus

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