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Christian J. Schmidt
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
CBMFEE Summary
on CBM Technological Competence Buildup
and Front-End ASIC Development Roads,
CBM-XYTER Family, RPC Readout
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
Test structures for TID measurements
Test structures for SEU measurements
Test structures for SET measurements, Qcrit
Ring oscillator for TID / SEU measurements
1.5 x 1.5 mm²
64 pads 28 core pads
36 pads
Technology Evaluation, Fundamental Competences
GRISU Test ASIC: UMC 0.180µ Process Evaluation on Radiation Hardness
Sven Loechner and the GSI ASIC Lab
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
Full Spectrum of Irradiation Test Sites ASIC SEU, SET studies with heavy ion GSI irradiation and test facility (X6 cave
in coop with bio physics group, 11.4 MeV/u)
SET vulnerability mapping at GSI Micro Beam test site
mapping with 700nm resolution
Total Ionizing Dose (TID) tests at Inst. for Exp. Nucl. Physics, University of Karlsruhe
(60keV X-ray, 100...600krad/h) UMC 0.180 shows very good annealing behaviour, GRISU irradiation up to 2.5 MRad done
Sven Loechner and the GSI ASIC Lab
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
RPC FEE and TDC developments (PADI and GET4 ASICs)
Holger Flemming and Harald Deppe for the GET4 TDC developments (GSI ASIC Lab) and Mircea Ciobanu for RPC Front-End integration into PADI ASIC (GSI Detector Lab)
Beyond FOPI RPC discrete electronics: 4 ch PADI Front-End ASIC for high resolution timing measurements lower power
differential impedance matched input
High resolution TDC ASIC Get4 for FAIR timing applications
CBM RPC targeted system performance: t < 80ps
PADI and Get4 tested together for the first time
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
PADI System Tests
Time resolution of electronicschallenge at very low threshold
0
20
40
60
80
100
120
140
0,75 1,5 2,4 4,75 15
Uin[mV]
σt
[ps
]FOPIPADI
Tests of PADI for R3B Neuland at FZDTests of PADI for R3B Neuland at FZDDaniel Bemmerer, Dmitry Yakorev, Daniel Bemmerer, Dmitry Yakorev,
Daniel Stach, Andreas WagnerDaniel Stach, Andreas Wagner FZD-DresdenFZD-Dresden
PADI tested for the first time on differential output RPC(STAR-counter) D. Gonzalez-Diaz
Resolution found: 33psEfficiency: 83%
PADI tested with APDs:stable operation
(D. Gonzalez-Diaz)
8 PADI at FOPI Beamtime
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
Status of the GET4 and FEET TDC Board
Focused on the measured results of the GET4 prototype
a second iteration of the 4 channel time core will be
submitted in November 2009
Different design variations concerning shielding will be investigated
The intention is an enhancement of the nonlinearities
(DNL & INL) and an improvement of the time resolution
Holger Flemming and Harald DeppeHolger Flemming and Harald Deppe
GSIGSI
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
CBM-XYTER Family Development
Detector operation with purely data driven readout
New production this year to correct temperature coefficient for robust, stable operation
supply detector prototypes with enough chips
n-XYTER,non rad hard AMS 0.35µ
CBM-dedicated FEE chip development
CBM STS XYTER Low power, low resolution
AGH Krakow, R. Szczygiel et al
CBM Gas (TRD) -XYTER higher res., adv. signal processing
ZiTi Heidelberg, P. Fischer et al
Interim work-horse front-end ASIC for detector prototyping
In parallel: chip development started in radiation hard UMC 0.180µ
final chipsto be expected
not before within two years
TRD front-end test chipINPN Bucharest, M. Petrovici et al
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
Data Driven Front-End: Asynchronous Channel Trigger
Testpulse Release
Slow Shaper, Energy
Fast Shaper, trigger and time stamp
Discriminator Output to initiate peak detection
n-XYTER prototype as employed in current CBM detector developments
New production prepared by Hans Kristian Soltveit (PI Heidelberg)Correction of enormous temp. coeff. Elaborate, full corner analysis for robust operationReduction of cross talk
Submission financed and targeted end of November
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
Individual signals are digitizedDigital signal processingDevelopment of infrastructure elements included
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
Prestudy on data transfer building block
Serialized data transfer via copper lines using simple p to p Aurora protocol and preemphasis/deemphasis techniques
Test chip realized in UMC 0.180µ (ASIC building block)
Stoyan Todorov's and Marco Oster's Diploma Thesis, Peter Fischer, ZITI Heidelberg/Mannheim
UMC 0.18µm radiation hardness studies
Sven Löchner
GSI Darmstadt
14th CBM Collaboration Meeting
October 7th, 2009TRD 8 channel front-end chip in AMS 0.35µ technology just arrived:
First test results presented by G. Caragheorgheopol
optional TRD front-end solution with analogue signal processing integration into TRD-XYTER chip demands process transfer to UMC 0.180
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
First Test-Chip towards Low Power STS-XYTER Readout Chip
Time over threshold energy conversion (ToT)
2.3 mW/channel at 500 ENC/30pF (c.f. ~20mW on n-XYTER)
4 to 6 bit resolution
30 channels
Chip Overview - Architecture
SiliconStrip
DetectorCSA
Switchable FBConst. Current
Discharge
Discriminator
TrimDACs6-bit
Mux
Thr
esho
ld
Add
ress Back-End:
FPGAGatingCountersPC-InterfaceEtc.
UMC 0.180 technology for radiation hardness
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
Last weekend´s very first testing results
0.4 to 42 fC (0.1 to 13 MIPs)
adjustable discharge slope
resolution vs. rate to be evaluated
14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009
FEE Session Summary
CBM chip development activities are ramping up
Fundamental questions are being answered
3 FEE Test Chips are on the table to be evaluated,
Successive chips are in the queue Tool boxes are filling up