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

                                                                                    

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

                                                                                    

14th CBM Collaboration Meeting, Split, Oct. 6 – 9, 2009

                                                                                    

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