Analysis of Point 5 VPT anode current data

Links

• ECAL Intercalibrations
• WG3: ECAL Monitoring Fundamentals
• WG3 root data file
• Sasha, EcalLaserMonitoringWG3 - EE rootuples
• Sasha - B field corrections, to DPG, 3 Dec 2009
• 131108_pc_ledovskoy-doses-currents.pdf

Presentations/write-ups

• 15.5.2014, Adam_Butler_Thesis.pdf
• 27.3.2014, Adam Butler, ECAL DPG meeting, VPT conditioning and crystal saturation
• 31.1.2014, Adam-Butler-InterimReport4.pdf
• 18.7.2013, Dave Cockerill, ECAL DPG, VPT currents and LHC fills
• 14.5.2013, Dave Cockerill, VPT Conditioning, ECAL Upgrade mtg
• 14.6.2012, Dave Cockerill, VPT burn-in analysis, MoCa mtg

PVSS notes on 2010-2012 data sets

• PVSS-notes-2010-2012-running.txt

EE HV pages

• EE HV twiki
• DaveC HV twiki
• EE HV web page

DQM data

• How_to_tunnel_to_P5

PVSS data

Supplied by Oliver Holme, Oracle Dump into zip file with data from 2010-2012, at

• /afs/cern.ch/work/d/davec/VPT-P5-DATA/OHOLME/
• EE_ELMB_data_2010_to_2012.zip
• 28Mbytes

Unzipped file for analysis:

• /afs/cern.ch/work/d/davec/VPT-P5-DATA/OHOLME/
• EE_ELMB_data_2010_to_2012.csv
• 391 Mbytes

ELMB channel correspondances

• Dee4.h2.jpg:
  
• ELMB-correspondences.txt
• Dee1 = EE+F, Dee2 = EE+N, Dee3 = EE-N, Dee4 = EE-F
• EE+ dist crate o/p card use
• EE- dist crate o/p card use
• Supercrystal mapping
• Minus end HV borads
• Cathy-Dee-HV-layout.png:
  

A typical entry:
"cms_ecal_dcs_07:ELMB/CAN_BUS_ECAL_HVM_M/ECAL_HVM_EEM/AI/ECAL_HVM_0","802.014","02-JUN-10 01.34.07.446000000 PM"

• CMS side EEM = EE minus
• Channel HVM_0 = channel 0
• Value 802.014 - a voltage, on line HVM_0, value in volts
• Date 02-JUN-10 = day, month, year
• Time 01.34.07 = hour, minutes, seconds
• AM or PM = PM (at end of string)

These 10 values are extracted to a root tree. File to read the csv file and create the tree/root summary file is:

• /afs/cern.ch/work/d/davec/VPT-P5-DATA/OHOLME/
• file-read-sasha.c

Summary files - 5.1 Mbytes, one each for EE+ and EE-

• /afs/cern.ch/work/d/davec/VPT-P5-DATA/OHOLME/
• full-holme-EEP.root
• full-holme-EEM.root

To extract data for individual channels:

• MyClass.h
• edit the .h file to choose EEP or EEM data
• MyClass.C

• No values are changed in this process. They are those from the PVSS database file.
• Only Unix time is added to the set of leaves

• edit the .C file to specify the single channel output file

To run in root:

      Root > .L MyClass.C
      Root > MyClass t
      Root > t.GetEntry(12); // Fill t data members with entry number 12
      Root > t.Show();       // Show values of entry 12
      Root > t.Show(16);     // Read and show values of entry 16
      Root > t.Loop();       // Loop on all entries

Files so far extracted (11 Oct 2013), stored in /afs/cern.ch/user/d/davec/public/PVSS/
EEP
Anode Currents:

• EEP-ch1.root
• EEP-ch5.root
• EEP-ch9.root
• EEP-ch13.root

Anode Voltages:

• EEP-ch0.root
• EEP-ch4.root
• EEP-ch8.root
• EEP-ch12.root

EEM
Anode Currents:

• EEM-ch1.root
• EEM-ch5.root
• EEM-ch9.root
• EEM-ch13.root

Plotting examples

Example 1

The last nine fills and anode currents for 2012, based on file:

• TDat.c
• This file loops over and fills the anode and luminosity data with the gROOT->ProcessLine command

Root > .x TDat.c
Note: may need to repeat command .x TDat.c to get right hand side vertical axis 
- need a solution to avoid this

Requires these files:

• Anode.h
• (edit .h file to choose single channel root file)
• Anode.C
• Fills 2 arrays with anode times and currents

• MyClassLumi2.h
• Gets lumi data from file:
• ConditionBrowser_1371315110765-2012-11-24-2012-12-15.root
• MyClassLumi2.C
• Fills 2 arrays with time and instantaneous luminosity

• last-nine-fills-2012.png:
  

Example 2 (not complete)

Fitting lumi data and comparing to anode currents
Need files

• A1-fill-nine-of-last-nine.c
• A1-fill-one-of-last-nine.c

Summary plots, Anode currents from 2010 to 2012

• Run file TDat-2011.c
• Anode-for-TDat-2011.C, rename to: Anode.C before running TDat-2011.c
• Anode-for-TDat-2011.h, rename to: Anode.h before running TDat-2011.c

Observations from summary plots below:

• 2010 data look too 'active' - were the counts per nano-amp reduced from 2011 onwards ??

• EEM-ch1 - see the 38 micro-amp step in 2012
• EEM-ch9, EEM-ch13, a 1 micro-amp gradual baseline rise in 2012

• EEP - all show very odd behaviour in 2011. We know the LV to ELMB was bad in this period.
• EEP-ch1, EEP-ch5, a 2-2.5 micro-amp gradual baseline rise in 2012
• EEP-ch9, EEP-ch13, a 0.5 micro-amp gradual baseline rise in 2012

• EEM-ch1-2010-2012.png, EEM-ch5-2010-2012.png, EEM-ch9-2010-2012.png, and EEM-ch13-2010-2012.png:
  

• EEP-ch1-2010-2012.png, EEP-ch5-2010-2012.png, EEP-ch9-2010-2012.png, and EEP-ch13-2010-2012.png :
  

Anode data corrections

1. EEM channel A1

Anode current step to ~3.8 micro-amps. Thought to be short near, or in, one VPT.
Left hand vertical axis, 1 count = 10 nA, voltage baseline at ~3800 = 38,000 nA = 38 micro-amps
Short with 800 V, impedance 20 Mohm, expect 800/20.10^6 = 40.10^-6 amps.
An example plot: * Anode-currents-EEM-A1-fill3000.png:

Need to subtract 3800 counts on all data from start time of short.

Luminosity Data

LHC fill summaries from the LHC:

• https://lpc-afs.web.cern.ch/lpc-afs/LHC/2016/luminosity_data_pp.txt
• https://lpc-afs.web.cern.ch/lpc-afs/LHC/2015/luminosity_data_pp.txt
• 2014 LS1
• 2013 LS1
• https://lpc-afs.web.cern.ch/lpc-afs/LHC/2012/luminosity_data.txt
• https://lpc-afs.web.cern.ch/lpc-afs/LHC/2011/luminosity_data.txt
• https://lpc-afs.web.cern.ch/lpc-afs/LHC/2010/stablebeams2010.txt

Also:

• http://lpc.web.cern.ch/lpc/lumiplots_2012.htm
• http://lpc.web.cern.ch/lpc/lumiplots_2011.htm

Format:

			Integrated lumi, per micro-b				peak inst. luminosity in Hz/micro-b
Fill	tstart	tstop	ATLAS	CMS	LHCb	ALICE	ATLAS	CMS	LHCb	ALICE
3378	1354744793	1354753984	23255359597	23255339058	2189158726	9530635	7090.32	7127.45	404.45	10.56

Luminosity root files

• ConditionBrowser_1382453518255-20-24-May-2012.root
• ConditionBrowser_1371315110765-2012-11-24-2012-12-15.root

Getting luminosity data

• CMS Instantaneous Luminosity with unix time
• Go to cmswbm
• cmswbm -> ConditionBrowser -> cms_omds_lb -> CMS_BEAM_COND ->CMS_LHC_LUMINOSITY
• LUMI_TOTINST
• Set prescaler set to 100
• Press "1D" plot
• Click on "Plot Value vs. Time" purple box and wait for plot to be made !!

Note:

• Luminosity data has a Unix time one hour ahead of the PVSS Unix time
• One hour has been subtracted from the lumi Unix time to synchronise the data

Getting CAEN Power Supply currents and voltages

EB/EE/ES HV Voltages and Currents

• Go to cmswbm
• cmswbm -> ConditionBrowser -> cms_omds_lb -> CMS_ECAL_HV_PVSS_COND --> FWCAENCHANNEL
• + HV_CURRENT
• + HV_VOLTAGE

Example of CAEN HV power supply current wrt LHC luminosity:

• Plot by checking both lumi AND current on the cmswbm page
• LumiPSCurrent_29-11-12.png:
  

Calculating VPT currents

Corrections to be applied for 0T to 3.8T, and for 1000/800V to 800/600V operation

• VPT-yield-4Tto0Tvstheta-and-1000-to-800-DPG-EE op-18Feb2010.png:
  
  

Attached files :

• file-read-sasha.c: file-read-sasha.c

• ELMB-correspondences.txt: ELMB-correspondences.txt

• full-holme-EEP.root: full-holme-EEP.root

• full-holme-EEM.root: full-holme-EEM.root

• MyClass.C: MyClass.C

• MyClass.h: MyClass.h

• TDat.c: TDat.c

• Anode.C: Anode.C

• Anode.h: Anode.h

• MyClassLumi2.C: MyClassLumi2.C

• MyClassLumi2.h: MyClassLumi2.h

• ConditionBrowser_1371315110765-2012-11-24-2012-12-15.root: ConditionBrowser_1371315110765-2012-11-24-2012-12-15.root

• Anode-for-TDat-2011.C: Anode-for-TDat-2011.C

• Anode-for-TDat-2011.h: Anode-for-TDat-2011.h

• PVSS-notes-2010-2012-running.txt: PVSS-notes-2010-2012-running.txt

• A1-fill-nine-of-last-nine.c: A1-fill-nine-of-last-nine.c

• A1-fill-one-of-last-nine.c: A1-fill-one-of-last-nine.c

• Cathy-Dee-HV-layout.png:
  

• ConditionBrowser_1382453518255-20-24-May-2012.root: ConditionBrowser_1382453518255-20-24-May-2012.root

• Dee4.h2.jpg:
  

• ELMB-correspondences.txt: ELMB-correspondences.txt

• LumiPSCurrent_29-11-12.png:
  

• 131108_pc_ledovskoy-doses-currents.pdf: 131108_pc_ledovskoy-doses-currents.pdf

• VPT-yield-4Tto0Tvstheta-and-1000-to-800-DPG18feb2010.png:
  

• Adam-Butler-InterimReport4.pdf: Adam-Butler-InterimReport4.pdf

• Adam-Butler-InterimReport4.pdf: Adam-Butler-InterimReport4.pdf

• Adam_Butler_Thesis.pdf: Adam thesis