Download Status of NeuLAND electronics

GSI Helmholtzzentrum für Schwerionenforschung GmbH
Status of NeuLAND electronics
(EE-Meeting, 8.Juni 2015)
K. Koch
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Location of the electronics
previous board concept
NeuLAND
typical pulse shapes
TOF13
GSI Helmholtzzentrum für Schwerionenforschung GmbH
typical results
First TAMEX Results with Ca beams
 TAMEX works in principle but there were problems.
 Largest problem was noise induced by threshold
crossing in LVDS-LVTTL converter.
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Electronics
 Electronics consists of LANDFEE, QTC, TAMEX, and TRIPLEX
GSI Helmholtzzentrum für Schwerionenforschung GmbH
New Electronics, PADI-version
 an alternatively new electronics could be a combination of PADI
(comparator) and TAMEX
 less cards, lower costs (PADI 1€ per channel)
PADI
QTC
new FEE


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problems with ToT > 200 ns
small dynamic range with QTC
dependence on CBM
fixed ASIC design
GSI Helmholtzzentrum für Schwerionenforschung GmbH
TAMEX2
New Electronics, NeuLANDFQT
 New electronics will be a combination of QTC (comparator) and TAMEX
 problem with noise solved - > converter LVDS-LVTTL
NeuLANDFQT
TAMEX2
GSI Helmholtzzentrum für Schwerionenforschung GmbH
NeuLANDFQT

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merge of LANDFEE, QTC and TRIPLEX
new pulser with analog coupling via transformer
multiplicity per card from FPGA via DAC to Triplex tree
single channel monitoring (analog and digital)
no analog sum
GSI Helmholtzzentrum für Schwerionenforschung GmbH
NeuLANDFQT, simulations
 Simulations show good results
 next: tests with existing pieces (e.g. QTC2)
GSI Helmholtzzentrum für Schwerionenforschung GmbH
NeuLANDFQT, simulations
GSI Helmholtzzentrum für Schwerionenforschung GmbH
New Electronics, tests with existing pieces
Before designing the new PCB boards we want to test the individual,
existing components as much as possible.
GSI Helmholtzzentrum für Schwerionenforschung GmbH
electronics tests with an
ArbitraryWaveformGenerator (AWG)
charge resolution
vs. charge integral
timing precision
 The requirements for NeuLAND are fulfilled
GSI Helmholtzzentrum für Schwerionenforschung GmbH
linearity of ToT
Dynamic energy range of NeuLAND
 The range goes over 2 orders of magnitude.
GSI Helmholtzzentrum für Schwerionenforschung GmbH
electronics tests with a small NeuLAND bar
Laserhead LDH-P-C-375B
laser
driver
lightbar (3cmx3cmx100cm)
laser
head
PMT
modified
QTC
modified
QTC
VFTX
pulser
monitor
“scope”
monitor
“scope”
transformer
transformer
PMT
 simulating a traversing ion by UV-laser (l=374nm, FWHM~50ps)
 get experience with a real detector setup (e.g. PMT response to
ohmic respectively inductive loads, generating reflections)
 investigations of PMT parameters
GSI Helmholtzzentrum für Schwerionenforschung GmbH
electronics tests with a small NeuLAND bar
Tested samples of transformers:
Hersteller
Typ
System
Frequenz
[MHz]
Kompensation
Amplitude
Coilcraft
Z9280ALB
50 W
0.25-450
120 W
285 mV
Coilcraft
WBC1-1TLB
50 W
0.25-750
150 W
290 mV
Mini-Circuits
ADT1-1WT
75 W
0.4-800
180 W
350 mV
Mini-Circuits
TC1-1T+
50 W
0.4-500
120 W
295 mV
Bild
Kompensation
PMT
Problem: using the real PMT base produces reflections
(using AWG-signals -> no distortions)
Solution? Compensation by a resistor.
GSI Helmholtzzentrum für Schwerionenforschung GmbH
electronics tests with a small NeuLAND bar
org. PMT signal
org. PMT signal with transformer
org. PMT signal with transformer (compensated)
Z9280ALB
ADT1-1WT
Comparison of the 4 existing
transformer samples and the
resulting integrals
GSI Helmholtzzentrum für Schwerionenforschung GmbH
electronics tests with a small NeuLAND bar
 parts of the new electronics have successfully been tested
 the monitor signals of PMT and pulser events have opposite polarity
GSI Helmholtzzentrum für Schwerionenforschung GmbH
NeuLAND electronic box
OR/multiplicity/monitor/pulser
to second electronic box (OR/multiplicity/monitor/pulser/(I2C))
LAN
48V
optical fibre
200MHz Clk


data & power
interface
200 channels per plane -> 13 TAMEX
6 resp. 7 TAMEX per box
NeuLAND
interface
TAMEX / power backplane
NeuLAND electronic boxes
TAMEX/NeuLANDFQT
TAMEX/
NeuLANDFQT
TAMEX/NeuLANDFQT
TAMEX/
NeuLANDFQT
TAMEX/NeuLANDFQT
TAMEX/
NeuLANDFQT
TAMEX/NeuLANDFQT
16x PMT in
16x PMT in
16x PMT in
16x PMT in
16x PMT in
16x PMT in
16x PMT in
optical fibre to second electronic box
GSI Helmholtzzentrum für Schwerionenforschung GmbH
OR/multiplicity/monitor/pulser
signal
combiner
chain1
chain2
LAN
Raspberry
pi
USB
HADCON
2
I2C
OR/multiplicity/monitor/pulser/(I2C)
NeuLAND interface
I2C
 concentrate slow control / signal chains to one strand
 control of parameters via LAN
 using HADCON2 to implement I2C into EPICS environment
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Milestones

NeuLANDFQT
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simulations done
partially functions tested with QTC2, done
schematics mostly done
layout scheduled for autumn 2015
TAMEX2
 minor changes in FPGA TDC code mostly done
 power scheme with LDO regulators in revision
 layout, production etc. subsequently to NeuLANDFQT

NeuLAND interface
 for startup with NeuLANDFQT, old TRIPLEX interfaces are usable as workaround
 next design steps will follow after layout of NeuLANDFQT

Clock distribution
 problems are identified, several solutions are under discussion
 will be fixed in time
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Summary
 NeuLANDFQT: LANDFEE+QTC+TRIPLEX


concept successfully tested
one single PCB board if possible
 New low voltage power concept

DC/DC converter only on backplane
 TAMEX2


minor changes in FPGA TDC code mostly done
power scheme with LDO regulators in revision
 New (differential) concept for clock distribution

is under construction
 NeuLAND interface

is also under construction, an interim solution is available
GSI Helmholtzzentrum für Schwerionenforschung GmbH
 Thank you
 for your attention
 Thanks to my colleagues
 Jochen Frühauf, Michael Heil, Jan Hoffmann, Daniel
Körper, Nikolaus Kurz, Cahit Ugur, Peter Zumbruch
and others
for collaboration.
GSI Helmholtzzentrum für Schwerionenforschung GmbH