1 edouard bechetoille, ipnl,cnrs, france edouard bechetoille, ipnl,cnrs, france wolte_8 22-25 juin...

11 Edouard BECHETOILLE, IPNL,CNRS, FRANCE Edouard BECHETOILLE, IPNL,CNRS, FRANCE WOLTE_8WOLTE_8 22-25 juin 2008 22-25 juin 2008

100 tons of LAr (Liquid Argon)Detectors T2K (Tokai 2

Kamiokande)(2km from accelerator)

R&D for liquid Argon TPC detectors for Neutrino and

astroparticle experimentsm

100 ktons Liquid Argon TPC (TimeProjection Chamber) for Astro particle PhysicsT2K second phase CP violation? LAGUNA: proton decay

2020 ? T2K phase II, LAGUNA, 100 Ktons LAr, 100 000 channels or more

2km295km

X00km

Date Sept 2007

July 2008

Sept 2008 Feb 2009 2011 2020 ?

Version PATOP TOPEST

Nb of channel 3 8 8*8=64 1000 channels 10 k channels 100k channels

Test site IPNL IPNL CERN 280m 2km X00 km

Detector weight 1 ton 100 tons 100 ktons


Electronic choices due to the detector principle• Detection with a system of wires of

primary ionization drifted in ultra-pure LAr by induction or collection, at minimum ~ 18000 electrons per channel

• No charge amplification at the level of the detector low noise preamp

• 400 ns sampling to reconstruct the drift time and the amount of charge

• 3D image reconstruction with several planes of wires + drift time

• Multichannel 3fC to 120fC (0.5μs pulse) pre-amplifier• 1000 e- ENC with 250pF Detector capacitance• Able to work in LAr vapours @ -150°C with very few power dissipation

e QE


Test setup in Liquid Nitrogen N2 @ 77K• 8100μ/0.35μ input transistor T1.4 supplied by 10 mA• In-between phase margin compensation

φ margin Schematic ENC : (e-)Without shaper

temp φ M lay φ M Sch 2M_ENC 20M_ENC Pure_ENC

-250 35,9 85,5 654,8 906,6 259,7

-200 57,51 86,45 1,14E+03 1,36E+03 414,8

-100 72,9 87,79 1,77E+03 1,84E+03 695,9

-30 77,46 88,58 2,10E+03 2,07E+03 874,7

30 79,82 89,13 2,34E+03 2,23E+03 1,01E+03

Cpa(A+1)CD

Qnoise-A

Qin

en

Vin

Vnoiseen

Cinj

Vout

Cpa

Rpa

CD

250pF

Detector H

τ= [20ns - 1s]

2)1()(

p

pHpH o

Pre-Amplifier

-A

external shaper

Equivalence without Rpa


Inside PATOP test chip

350Ω : compensation resistance

5pF : compensation capacitance

1/81 pattern of the input trans.Half of the cascode trans.


Two Test chip versions

AMS 0.35µ

•TOPEST expected for mid-july 2008

PA shaper buffer

biasing circuit

•PATOP received in October 2007


Test setup in Liquid Nitrogen N2 @ 77K


Typical 3fC input charge signal

Vpeak

Vnoise

Vpeakq

VnoiseQinENC

*

* Cpa

Rpa

CD

250pF

H

τ= [5ns - 1s]

2)1()(

p

pHpH o

Pre-Amplifier

-A

external shaper

,q=1.6 10-19


Performances for various temperatures

Vpeakq

VnoiseQinENC

*

*

Vpeak Vnoise ENC

2MΩ

20MΩ

Shaping time [5ns-1000ns]

- Ambient ~30°C- Vapour~ -110°C- LN2 : 77K

H

τ= [5ns - 1s]2)1(

)(p

pHpH o

external shaper

Cpa(A+1)CD

Qnoise -A

Qin

en

Vin

Vnoiseen

Cinj

Vout


Powered with 3V battery supply

No more noise (sdev) increasing for 20MΩ channel, its shows a lack of power supply decoupling.

- Ambient ~30°C- LN2 : 77K

Vpeak Vnoise ENC


Noise performance in temperature

• The noise target that we expect is 1000 e-, considering an input capacitance of 250pF

• Due to decoupling weakness, the ENC is not as low as expected.

Circuit 2MΩ 20MΩ PA Shaper 1μs PA Shaper 1μs temperature th exp th exp th exp th exp

30 2040 2261 1530 1590 2225 2720 1272 1648 -111 1722 1847 1002 1166 1811 2111 887 1171 -200 1145 1990 599 1078 1363 2545 581 1310

efficiency -111°C/30°C -15.5 -18.2 -34.5 -26.6 -18.6 -22.3 -30.2 -28.9 -200°C/30°C -43.8 -11.9 -60.8 -32.1 -38.7 -6.4 -54.3 -20.5

– Theoretical vs. Experimental

• ENC table for various temperature with or without shaper for 2MΩ and 20MΩ channels


Resistance for various temperature

Rpolyhc 2MΩ ambiant to -196°C Rpoly2 350Ω ambiant to -196°C

T0 RT0 TCR1 (10-3Ω/K) TCR2 (10-6Ω/K) 27°C spec. exp exp exp

rpoly2 350Ω 400Ω 0.70 1.17 rpolyhc 2MΩ 1.8MΩ -2.37 5.70

)²0(2)0(11)0(

)(TTTRCTTTCR

TR

TR

Measured Using a QuadTech 7600 RLC meter


Threshold voltage

temp (°C) -196 -75 +25 Vth_exp 1.183 0.922 0.733 Vth_th 1.133 0.911 0.731

NMOSWtot=199.8μ, L=0.7μ, ngate=9

-200°C

-75°C

+25°C

temp(°C) -198°C -75°C +25°C Vth_exp 0.904 0.871 0.842 Vth_th 0.796 0.662 0.552

Vth

PMOSWtot=100μ, L=0.35μ, ngate=10


members

• LAr R&D electronics IPNL for T2K and Astroparticle Physics : – D. Autiero, E. Bechetoille, B.Carlus, S. Gardien,

C.Girerd, J. Marteau, H.Mathez• In collaboration with ETHZ and Bern groups

Thank you !


Appendix


SMD Capacitances mounted on PCB

+30°C; -110°C; -194

-194

+30°C

Power supply Decoupling : 10μFX5R oxyde

Substitute detector capacitance : 250pFCOG oxyde


Quadtech RLC measures of SMD tested in LN2 # Reference valuePackage Manufacturer type Tension Made in1 619-8276 10u 1206 Murata X7S 4 Japan2 653-0620 10u 1206 Murata X7R 6.3 Japan3 653-0541 10u 1206 Murata X5R 6.3 Japan4 391-224 10u 1206 AVX Kyocera X5R 6.3 UK5 434-8097 10u 1206 Kemet Y5V 10 South Korea6 148-092 10u 1206 Kemet X5R 10 Malaysia7 619-8232 100n 1206 Murata X7R 16 Japan8 264-4179 100n 1206 Kemet X7R 50 Mexico9 211-3401 100n 1206 Siemens X7R 50 Austria

10 464-6852 100n 1206 AVX Kyocera X7R 50 UK11 464-6931 100n 1206 AVX Kyocera Y5V 50 UK12 619-8024 1u 805 Murata X7R 6.3 Japan13 464-6688 100n 805 AVX Kyocera X7R 50 USA14 215-9996 100n 805 Siemens X7R 50 Austria15 648-0957 100n 805 Kemet X7R 16 Mexico16 220-8026 100n 805 Murata X7R 25 Singapore17 378-665 100n 805 Philips Y5V 25 Taiwan18 545-0804 1p 805 Epcos C0G 50 Korea19 545-0882 100p 805 Epcos C0G 50 Croatia20 618-1486 4.7Ω 805 Phycomp +/- 100ppm/°C150 China21 1301818 10u 805 AVX Kyocera X5R 6.322 9227814 10u 805 Kemet X5R 6.323 1463377 10u 805 Taiyo yuden X5R 6.324 8820210 100n 1206 Murata COG 2525 1288244 10n 1210 Kemet X7R 100026 9402136 10u 805 Phycomp X5R 1027 1463467 0.01Ω 1206 Taiyo yuden FC FB 4Amp Philippines


Dynamic measures

PMOS test from 0 to 3.3 => starts with high current

NMOS test from 0 to 3.3 starts with small currents Progressive warming

Measures last ⋍ 2 minutes


ENC as a function of Cdet

ENC = 262.0 + 14.8 * Cdet; 2M_30_0uENC = 513.2 + 8.3 * Cdet; 2M_-100_0uENC = 512.8 + 9.1 * Cdet; 2M_-200_0u




1 edouard bechetoille, ipnl,cnrs, france edouard bechetoille, ipnl,cnrs, france wolte_8 22-25 juin...

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