status n-xyter and cbm-xyter christian j. schmidt et al., gsi darmstadt gsi, darmstadt, feb. 29 th...
TRANSCRIPT
Status
n-XYTER and CBM-XYTER
Christian J. Schmidt et al.,GSI Darmstadt
GSI, Darmstadt, Feb. 29th 2008
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
n-XYTER / CBM-XYTER
Front-End: 128 channel charge sensitive front-end for MIPs in Silicon, both polarities
Purely data driven, autonomous hit detection (self triggered)
Peak detection, analogue storage and readout
Average per channel hit rate 160kHz with 10% dead time
(determined by pile-up on slow channel)
Readout: Per channel analogue energy and digital time stamp FIFO
De-randomizing, sparcifying Token Ring readout at 32 MHz
Architecture: Neutron – X, Y, Time and Energy ... R
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
Short to Mid Term: n-XYTER Detector Prototyping
Current n-XYTER, developed for thermal neutron detection
(EU-FP6 NMI3 DETNI)
It will serve us to realize various detector prototyping projects
within CBM but also FAIR
CBM STS module prototyping
CBM MUCH readout (in particular high density gas detector readout)
CBM MAPMT-RICH
but also other projects as e.g. PANDA GEM TPC or Silicon MVD
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
Midterm and Beyond: the Dedicated CBM-XYTER
Exploit detector prototyping experiences
Self triggered architecture
Rates adapted
Radiation hard
On chip ADC
Efficient, low lead-count serialized data transfer
DC-coupled double sided Silicon readout
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
CBM-XYTER Development Collaborators
AGH Krakow
(Robert Szczygiel,
Pavel Grybos)
IZT Heidelberg(Peter Fischer et al)
GSI Darmstadt(Christian J. Schmidt)
coordination
MEPHIMoscow
(Eduard Atkin et al)
principle tripod
collaboration
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
Status of Testing, Chip Availability
n-XYTER has been investigated and tested at
Uni-Heidelberg, Uni-Münster, VECC (Kolcatta, India), INP & AGH Krakow, GSI-
Detectorlab
No functional flaws seen
cross coupling (in-channel and inter -channel) may increase effective noise figure
in current chips, reason to be identified
Temperature coefficient makes current chips less convenient to operate
Complicated Mixed Signal Chip
First 250 chips will rapidly be used up after testing and evaluation
An engineering run will need to supply the bag of chips
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
The n-XYTER Starter Kit...
Chip testing at PI Heidelberg and at GSI detectorlab
Steps towards a CBM readout chain:SysCore (Norbert Abel, Udo Kebschull, Andreas Kugel, Dirk Gottschalk)
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
Analogue Signal Sequence (Test Channel)
Testpulse Release
Slow Shaper
Fast Shaper
Discriminator Output
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
Analogue and Digital Signal Out at 32MHz
operation at 250 MHz
Clk speed
clk32MHz
clk128MHz
DataValidDelay 4ns
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
First n-XYTER connected to Silicon Strips in Krakow
CBM Collaboration Meeting 26.02.2008 Krzysztof Kasiński (AGH Cracow) [email protected]
ASICs and Detector,Sucima Readout
(Adam Czermak, Robert Szczygiel, Krzysztof Kasinski and others)
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
The plan to get more chips for detector prototyping
Re-submission of MPW masks with modified process options
(non opto) will quickly:
clarify current process related uncertainties
yield enough chips for prototyping and beam tests this year
An engineering run prepared for submission in September
2008 will provide abundant chips for prototyping even of
larger detector systems
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
FEB-Developments (n-XYTER based)
FEB starter kit (Rafal Lalik) one-chip board for evaluative needs.
4chip FEB for gas detector readout
4chip FEB for Silicon detector readout, double sided
Flexcable as an alternative to PCBs: Studbonding of chips to micro cables
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
Current CBM-XYTER development issues ADC or Time over Threshold (TOT) architecture for signal conversion?
What is an adequate scheme to daisy-chain various chips for a bandwidth charing data
transfer over one link?
Even though everybody celebrates the novel funding sucesses of FAIR, the money still has a long way to go until it may be accessible for our partners in Krakow and Moscow!
Realize radiation hardness tests on the TRAP chip to quantify hardness for UMC 0.180
Fundamental architectural bifurcation:
TOT promises far less architectural overhead and thus substantial power saving.
Yet the ADC appears crucial if resolution beyond even 5 bit is targeted.
Higher resolution TOT tends to result in non equal bin-width
We will need to evaluate these options from the detector side.
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008
Serious Externally Determined Issues
Financing promises need to be put in action
National funding agencies must get moving to channel money to the working groups
Institutes need to express commitment
For the CBM-XYTER development be given priority by contributors,
We are going... but yet with handbrakes on....
11th CBM Collaboration Meeting, GSI, Feb. 29th 2008