MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 1
DAQ fo KL and TOFDAQ fo KL and TOF
o General Information
o Status of Synchronization problem
o FEE for TOF2
Jean-Sebastien Graulich, Geneva
ReminderReminder
TOF Front EndTOF Front End
KL Front EndKL Front End
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 2
Issues (1)Issues (1)
Cross TalkCross Talk Possible sources
Splitter RC Shaper Twisted pair cable
Affecting both TOF and KL Cabling done in such a way that Requiring
coincidence between opposite PMTs reduce the effect strongly but not completely
Needs some dedicated studies
Action: A better splitter is under Action: A better splitter is under production in Genevaproduction in Geneva
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 3
Cross TalkCross Talk
Consequence:Consequence:
Dead Channel unnoticed ! (rate Dead Channel unnoticed ! (rate != 0)!= 0)
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 4
- S6 in TOF 1 (ch 73)
- Disconnected in the hall
- Probably for the entire September run
TDC01 Channel Number
Co
un
ts
TDC00 Channel Number
Co
un
ts
Issues (2)Issues (2)
Discriminator dead timeDiscriminator dead time Minimum width of logic signal after
discriminator:
100 ns100 ns Double pulse resolution: 110 nsDouble pulse resolution: 110 ns
In a given TOF PMT, it is IMPOSSIBLE to see two hits in the same burst !
Complying with specifications but a Complying with specifications but a real limitationreal limitation
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 5
Issues (3)Issues (3)
Noise in FADCNoise in FADC Fluctuating baseline Seems to be time correlated with the particle
trigger
Affects Charge resolutionAffects Charge resolution Needs dedicated studies
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 6
Synchronization Synchronization ProblemProblem
TOF and KL FEE in different VME TOF and KL FEE in different VME CratesCrates
Each crate receives separate DAQ trigger at the end of the spill
Perfect Synchronization needed for Perfect Synchronization needed for correlation between TOF and KLcorrelation between TOF and KL
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 7
Understanding the Understanding the ProblemProblem
Synchronization can be lost because ofSynchronization can be lost because of Unstable electronics in DAQ trigger distribution Unstable behavior of the VME/Pci Interface
The DAQ software release the busy The DAQ software release the busy and enables the DAQ trigger receiver and enables the DAQ trigger receiver channel after readoutchannel after readout
Must go through the VME/Pci Interface It happens that one of the two commands is not
executed properly… Unpredictable Cured only by a power cycle
Has to be monitoredHas to be monitored
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 8
DAQ Trigger MonitorDAQ Trigger Monitor
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 9
Number of LDC receiving a DAQ Trigger per DAQ event
LDC Number
cou
nts
# o
f D
AQ
Tri
gg
ers
Particle Trigger Particle Trigger monitormonitor
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 10
Equipment number
LDC Number
Co
un
ts#
of
Pa
rt T
rig
ger
s
V1724FADCsScalar ch0
TDCs
V1731FADC
FADC behaviorFADC behavior
During September RunDuring September Run One FADC didn’t accept particle triggers at
all I am suspecting a hardware failure
Another FADC missed all the particle triggers for 1 single spill at the beginning of the run and then behaved normally
Need to be sorted out with CAENNeed to be sorted out with CAEN I need help here
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 11
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 12
FEE for TOF2 FEE for TOF2
Needs (ignoring cabling and HV)Needs (ignoring cabling and HV) 1 TDC V1290 5 FADC V1724 Splitters and Shapers available in Geneva
To be shipped
IssuesIssues NIM crate room
Not sure the power supply will stand a full load VME crate room
All TOF TDC must be in the same crate TOF FADC will go to KL crate
A major update of crate layout is necessary !
SummarySummary
TOF0/1 and KL in good shapeTOF0/1 and KL in good shape Cross talk needs attentionCross talk needs attention Synchronization has to be monitoredSynchronization has to be monitored TOF2 installation is not trivialTOF2 installation is not trivial
MICE CM25 Nov 2009 Jean-Sebastien Graulich Slide 13
