Ursula Bassler, LPNHE Paris 1Collaboration Meeting - 13 Sept. 2001

DD Calorimeter: Status & Plans

Preamp/Driver

Trig. sum

Filter/Shaper

x1

x8

SCA (48 deep)

SCA (48 deep)

SCA (48 deep)

SCA (48 deep)

BLSOutputBuffer

Bank 0

Bank 1

SCACalorimeter

Calibrationelectronicsreadoutchain

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, MT(W e), Z ee

Mingcheng Gao,. Columbia 2Collaboration Meeting - 13 Sept. 2001

DD Timing Studies: triple samplingsignal

time0 +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

Alan Stone, Lousianna Tech 3Collaboration Meeting - 13 Sept. 2001

DD But: the ICD timing…

Crate FPGAEarly/Nominal

Late/Nominal Comments

4 v17 0.67 0.74 bad pedestals SW9,SW13

5 v17 0.54 0.71 bad SCAs SW5,SE8

6 v17 0.65 0.74 bad SCAs SE3,SE5

7 v17 0.59 0.70 bad SCAs SWE10,SE12

4v18 corr

1.0 0.63 bad pedestals SW9,SW13

5v18 corr

0.90 (1.0) 0.59 bad SCAs SW5,SW8

6v18 corr

0.97 0.63 bad SCAs SE3,SE5

7v18 corr

good ICD timing requires signal to be delayed

additional cable!

Rama Calaga, Nirmalya Parua, Stony Brook 4Collaboration Meeting - 13 Sept. 2001

DD 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

Alan Stone, Lousianna Tech 5Collaboration Meeting - 13 Sept. 2001

DD SCA-behavior

all faulty channels were changed for ICD ( ~ 15%)

bad SCA chips labeled for detailed studies at SUNY

Ursula Bassler, LPNHE Paris 6Collaboration Meeting - 13 Sept. 2001

DD 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)

AD

C c

ou

nts

AD

C (

mea

s-fi

t/m

ax)

pulse height

em channel

pulse height

AD

C (

mea

s-fi

t/m

ax)

gain x8 gain x1

Alex Melnitchouk, Brown 7Collaboration Meeting - 13 Sept. 2001

DD “Dead Regions” – “Hot Cells”

Jacob Balandares, Columbia 8Collaboration Meeting - 13 Sept. 2001

DD 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

Dan Edmunds, MSU 9Collaboration Meeting - 13 Sept. 2001

DD 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

Ursula Bassler, LPNHE Paris 10Collaboration Meeting - 13 Sept. 2001

DD 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

 

Ursula Bassler, LPNHE Paris 11Collaboration Meeting - 13 Sept. 2001

DD Information

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

Links to Calorimeter web-pages:

•Calorimeter Operation & Commissoning :

Calorimeter status, Shift & Operation instructions, Logbook, Useful Runs•Calorimeter Electronics Upgrade Documentation: Operational Readiness Clearance Documentation, Upgrade & Commissioning Status Talks•Calorimeter Online & Offline Software Meetings :

Agenda & Transparencies for Software meetings, Tuesday 10:00 am 9th circle•Calorimeter Software :

 Calorimeter Reconstruction Software

Any contribution to their improvements is welcome!

Mike Tuts, Columbia 12Collaboration Meeting - 13 Sept. 2001

DD Calorimeter Run Information

  

This web page is for the use of shifters and experts for updating and viewing the Calorimeter Runs database. The database uses MS Access 2002. It is fully viewable and active IF you use MS Internet Explorer ver 5.5 or above. That means you are screwed if you use Netscape - sorry.The links at left will link you to various live database views:

D0 Calorimeter Run Database Web 

News - new developments and updateAll Runs - A summary of fields for all runs in databaseAll Runs Day - A summary of fields for all runs sorted by dayAll Runs Type - A summary of all fields for all runs sorted by run typeStatic Database Reports - these reports are NOT dynamic, but need to be refreshed by hand to remain current, however they are visible to all.Input Data - A page that takes you to the data input pages FOR EXPERTS ONLY

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

Ursula Bassler, LPNHE Paris 13Collaboration Meeting - 13 Sept. 2001

DD 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!