# Presentation: 580059

## Calorimeter: Status & Plans

**Preamp/**
**Driver**

**Trig. sum**

**Filter/**
**Shaper**

**x1**

**x8**

**SCA (48 deep)**

**SCA (48 deep)**

**SCA (48 deep)**

**SCA (48 deep)**

**BLS**

**Output**
**Buffer**

**Bank 0**

**Bank 1**

**SCA**

**Calorimeter**

**Calibration**

**electronics**
**readout**
**chain**

**VRC installation:**** **read out at 300Hz
**Timing Adjustments: **global timing done
**Pedestal Calibration: **CALIB? / validation
**SCA-commissioning: **studies ongoing
**Pulser Ramps: **first looks
**Hot Cells: **hardware improved
**Trigger Studies: **open questions** **
******-jet, M****T****(W ******** e********),  Z ******** ee**

## Timing Studies: triple sampling

**signal**

**time**

**0**

**+1**

**-1**

**comparison of energies measured at the **
**nominal BX,132ns earlier/later:**
**ratios allow to determine time offset**
**more precise timing from comparison with model**

**+ 81 ns**

**+ 97 ns**

**+ 113 ns**

**late/**
**nominal**

**early/**
**nominal**

**•**

**•**

**•**

******=0.77**

******=0.69**

******=0.78**

******=0.82**

******=1.04**

******=0.64**

******=0.61**

******=0.39**

## But: the ICD timing...

** ****good ICD timing requires signal to be delayed**
** ****additional cable!**

## Pedestal Calibration

** ****Tools being developed for calibration validation **
** ****Mrinmoy left ******** latest version delivered with many improvements, but not working correctly yet **

**pedestal **
**comparison **
**between 2 calibration runs**

## SCA-behavior

** ****all faulty channels were changed for ICD ( ~ 15%)**
** ****bad SCA chips labeled for detailed studies at SUNY **

## Pulser Calibration

** ****measurement of  pulse shape:**
** ****validation of signal simulation model **
** ****determination of optimal calibration        timing for various channel types **
** ****linearity studies of gain paths:**
** ****linearity with respect to linear fit **
** ****preliminary studies at 0.2% level **

**time (ns)**

**ADC counts**

**ADC (meas-fit/max)**

**pulse height**

**em channel**

**gain x1**

## “Dead Regions” – “Hot Cells”

## Hot Cell Killing

**Hardware improvement: replacement of bad SCA-Cards**

**apply “Hot Cell Killer” on remaining bad channels**
**improvement of calibration validation procedure**
**online Hot Cell identification in CalExamine**
**database modification **

## Trigger Studies

**slow rise of trigger signal not understood**
**trigger threshold w.r.t. precision read-out: ********2 difference**
**behavior of hadronic veto not clear**

**studies on signal shape in the electronics chain, understanding of ADC/GeV conversion w.r.t. trigger signal **
**L1 trigger Read Out needed**

## October Shutdown

**Power Supplies: **** (Dave Huffman, Pat Liston, Mike Cherry)**** ****Access: BLS-Platfrom**** ****Time Estimation: 14 days**** **
- replace fuse holders in BLS PS  for 20 and 25 Amp fuses with magnetic circuit breakers
- repair broken PreAmp PS
- complete and repair bad PS monitoring
**?Reflection Measurements: **** (French +  calo shifters)**** ****Access: PreAmp-Platfrom**** ****Time Estimation: 12 days**** **
- complete reflection measurements
- identification of bad Cryostat/Detector channels, repair?
**Pulser Wave form Measurements: **** (French +  calo shifters)**** ****Access: PreAmp/BLS-Platfrom**** ****Time Estimation: 4 days**** **
- measurement of Pulser wave forms
- detection of bad pulser/Preamp connections, repair

**?Timing Adjustments: **** **** (Dean/Mingcheng/Nirmalya)**** ****Access: BLS-Platfrom**** ****Time Estimation: ?**** **
- adjust BLS Crate Controller Jumpers for timing differences crate by crate
**Electronics Debugging: **** **** (calo shifters)**** ****Access: PreAmp/BLS-Platfrom**** ****Time Estimation: 12 days**** **
- replacement of pre identified **(Fu)**** bad SCA chips**
- mapping verifications
- verification and debugging of PreAmps/Pulsers/BLS/Trigger Summers and Drivers

## Information

**Calorimeter Home-page:**
**http://www-d0.fnal.gov/~d0upgrad/calelec/calorimeter_electronics.htm**

**Links to Calorimeter web-pages:**** **
- _[Calorimeter Operation &](http://www-d0online.fnal.gov/www/groups/cal/cal_main.html)__[ Commissoning ](http://www-d0online.fnal.gov/www/groups/cal/cal_main.html)_**:**** **Calorimeter status, Shift & Operation instructions, Logbook, Useful Runs
- _[Calorimeter Electronics Upgrade Documentation:](http://d0server1.fnal.gov/projects/calorimeterelectronics/www/)_** **Operational Readiness Clearance Documentation, Upgrade & Commissioning Status Talks
- _[Calorimeter Online & Offline Software Meetings](http://www-d0.fnal.gov/~d0upgrad/d0_private/software/calorimeter/meetings.html)_** :** Agenda & Transparencies for Software meetings, Tuesday 10:00 am 9th circle
- _[Calorimeter Software](http://www-d0.fnal.gov/~d0upgrad/d0_private/software/calorimeter/calorimeter.html)_** :**** ** Calorimeter Reconstruction Software

**Any contribution to their improvements is welcome!**

## Calorimeter Run Information

**\\D0server4\projects\CalorimeterElectronics\Tuts\Cal_Runs_Database\index.htm**

## What can you do?

**sign up for some shifts:**
** ****3 every month or two months will make a great difference for us!**
** ****non-experts are demanded!**
**look at the data:**
** ****feed-back for hot cells or dead regions, strange effects**
**“****useful run information” will depend on the input we get!**
**some problems have been seen offline first!! **
****** ****allows to develop better online tools**
** ****trigger debugging, efficiencies, turn on curves**
** ****studies related to the energy scale**
**help to develop tools ******** TASK LIST on commissioning web-page!**
**Talk to Nirmalya, Andre, Lee or me!**