Noise Filter Studies for CMS Forward Hadron Calorimeter (HF) Between Old and New PMT's Using Data in 2012

During the data taking before 2012 some abnormal events which have higher signals than expected were observed. Most of these were due to muons. When a muon hits the PMT glass window it creates a huge signal. To eliminate this kind of events 24 old HF PMTs (Hamamatsu R7525) in HF Minus at iphi 43 (co...

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Autores principales: Dumanoglu, Isa, Guler, Yalcin, Gurpinar, Emine, Kunori, Shuichi, Lezki, Samet, Tali, Bayram
Lenguaje:eng
Publicado: 2016
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/2241151
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author Dumanoglu, Isa
Guler, Yalcin
Gurpinar, Emine
Kunori, Shuichi
Lezki, Samet
Tali, Bayram
author_facet Dumanoglu, Isa
Guler, Yalcin
Gurpinar, Emine
Kunori, Shuichi
Lezki, Samet
Tali, Bayram
author_sort Dumanoglu, Isa
collection CERN
description During the data taking before 2012 some abnormal events which have higher signals than expected were observed. Most of these were due to muons. When a muon hits the PMT glass window it creates a huge signal. To eliminate this kind of events 24 old HF PMTs (Hamamatsu R7525) in HF Minus at iphi 43 (corresponds to one sector) were replaced with new multi anode PMTs (Hamamatsu multi anode R7600) which have thin glass windows. These new PMTs were installed and tested in H2 test beam area in 2009 [1]. To check whether these new PMTs perform better than the old ones data taken in 2012 were analyzed using various predefined noise filters. Noisy rechits percentage was found to be around 6-7 \% for the new PMTs while it varies between 29-66 \% for the old PMTs for various trigger selections and for HFLongShortFilter after an energy cut of 500GeV [2].
id cern-2241151
institution Organización Europea para la Investigación Nuclear
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publishDate 2016
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spelling cern-22411512019-09-30T06:29:59Zhttp://cds.cern.ch/record/2241151engDumanoglu, IsaGuler, YalcinGurpinar, EmineKunori, ShuichiLezki, SametTali, BayramNoise Filter Studies for CMS Forward Hadron Calorimeter (HF) Between Old and New PMT's Using Data in 2012Detectors and Experimental TechniquesDuring the data taking before 2012 some abnormal events which have higher signals than expected were observed. Most of these were due to muons. When a muon hits the PMT glass window it creates a huge signal. To eliminate this kind of events 24 old HF PMTs (Hamamatsu R7525) in HF Minus at iphi 43 (corresponds to one sector) were replaced with new multi anode PMTs (Hamamatsu multi anode R7600) which have thin glass windows. These new PMTs were installed and tested in H2 test beam area in 2009 [1]. To check whether these new PMTs perform better than the old ones data taken in 2012 were analyzed using various predefined noise filters. Noisy rechits percentage was found to be around 6-7 \% for the new PMTs while it varies between 29-66 \% for the old PMTs for various trigger selections and for HFLongShortFilter after an energy cut of 500GeV [2].CMS-CR-2016-355oai:cds.cern.ch:22411512016-11-10
spellingShingle Detectors and Experimental Techniques
Dumanoglu, Isa
Guler, Yalcin
Gurpinar, Emine
Kunori, Shuichi
Lezki, Samet
Tali, Bayram
Noise Filter Studies for CMS Forward Hadron Calorimeter (HF) Between Old and New PMT's Using Data in 2012
title Noise Filter Studies for CMS Forward Hadron Calorimeter (HF) Between Old and New PMT's Using Data in 2012
title_full Noise Filter Studies for CMS Forward Hadron Calorimeter (HF) Between Old and New PMT's Using Data in 2012
title_fullStr Noise Filter Studies for CMS Forward Hadron Calorimeter (HF) Between Old and New PMT's Using Data in 2012
title_full_unstemmed Noise Filter Studies for CMS Forward Hadron Calorimeter (HF) Between Old and New PMT's Using Data in 2012
title_short Noise Filter Studies for CMS Forward Hadron Calorimeter (HF) Between Old and New PMT's Using Data in 2012
title_sort noise filter studies for cms forward hadron calorimeter (hf) between old and new pmt's using data in 2012
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/2241151
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AT guleryalcin noisefilterstudiesforcmsforwardhadroncalorimeterhfbetweenoldandnewpmtsusingdatain2012
AT gurpinaremine noisefilterstudiesforcmsforwardhadroncalorimeterhfbetweenoldandnewpmtsusingdatain2012
AT kunorishuichi noisefilterstudiesforcmsforwardhadroncalorimeterhfbetweenoldandnewpmtsusingdatain2012
AT lezkisamet noisefilterstudiesforcmsforwardhadroncalorimeterhfbetweenoldandnewpmtsusingdatain2012
AT talibayram noisefilterstudiesforcmsforwardhadroncalorimeterhfbetweenoldandnewpmtsusingdatain2012

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