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Resistive bulks industrialization - PowerPoint Presentation

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Resistive bulks industrialization - PPT Presentation

S tatus report 2 october 2012 Fabien Jeanneau PAGE 1 RD51 Collaboration meeting Stony Brook University October 2012 Industrialization for the nsw PAGE 2 RD51 Collaboration meeting Stony Brook University October 2012 ID: 802744

october 2012 brook university 2012 october university brook page collaboration meeting stony µm mesh rd51 mohms bulk detectors large

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Slide1

Resistive bulks industrialization Status report

2 october 2012

Fabien Jeanneau

| PAGE 1

RD51 Collaboration meeting | Stony Brook University | October 2012

Slide2

Industrialization for the nsw| PAGE 2RD51 Collaboration meeting | Stony Brook University | October 2012

Goal (see

talk by Joerg Wotschack

in WG1)Large

resistive detectors (bulk?) of 0.5x1 m2

for end-2012/begin-2013During 2013:

technical adaptation (investment in machines) for a

width of 1 m to achieve areas of 1 x 2 m2

Production

during

2014/2015

Road

map

(

NSW

milestones

)

July 2012

:

delivery

of BXY 10x10

cm

2

and tests (

CERN/Saclay)

End

2012

:

towards

large areas (

0,5x1 m

2

)

replacement of

MBTS

on

ATLAS (48

to

96 chambres

of

0,6x0,8 m

2

)?

Geoazur

project

(P. Salin)

2013/2014

:

towards

nominal areas (1 x 2

m

2

)

Industrial

partners

ELVIA / CIREA

(France), ELTOS (

Italy

)

, Triangle

Labs

(Nevada, US)

Slide3

Elvia / cea partnershipCommon fundings since

one year (ANR) to

develop large area detectors protected

against sparks

(SPLAM)COMPASS: large pixel MM detector

with buried

resistors (see

the talk by Damien Neyret and Florian Thibault, WG2)

CLAS12: large

bulk

on

thin

pcb

(resistive solution also studied for the forward)Other PCB studies

| PAGE 3

RD51 Collaboration meeting | Stony Brook University | October 2012

PLV

bulks

Slide4

first step: small bulk XY| PAGE 4RD51 Collaboration meeting | Stony Brook University | October 2012

Use of

already

existing layout

Resistive

bulk (50 to 100

Mohms along

the strips)

X-Y

readout

Active area: 10 x 10 cm 2

Geometry

:

strip

pitch 250 µmstrip width 150 µm

Y readout

X

readout

Coverlay

FR-4

128 um

Bulk Mesh

Slide5

BXY1 : First batch (july 2012)| PAGE 5RD51 Collaboration meeting | Stony Brook University | October 2012

Visit to CIREA (Cholet) in

order to make

the voltage tests

The visual inspection shows

waves on the mesh

Diagnostic

: the mesh is

not stretch

enough

3 detectors are

delivered

at

the beginning of JulyMeasurements in gas give 55

Fe spectrum with

low energy

resolution

and evidence of an inhomogenous amplification gap (due to stretching)

Slide6

BXy1 : resistivity measurements by ELVIA / cirea| PAGE

6RD51 Collaboration meeting | Stony Brook University | October 2012

MOhms

MOhms

MOhms

MOhms

One

measure

every

10

strips

average

#1

#3

#2

#4

Measurement

device

:

Megger

MIT 420

Slide7

Bxy1 : stretching of the mesh | PAGE 7RD51 Collaboration meeting | Stony Brook University | October 2012

~ 1 °

Microscope

measurements

Slide8

Bxy1 : voltage measurements by elvia / cirea

#1#2

#3 (washed)

#4500 V4

nA5

nA5 nA5 nA

600 V

6 nA7 nA

700 V

7

nA

30

nA

8

nA800 V10 nA (unstable)10 nA (unstable)spark

10 nA10 nA (

unstable)

| PAGE 8

RD51 Collaboration meeting | Stony Brook University | October 2012

Slide9

Bxy1 : 55Fe calibration| PAGE 9

RD51 Collaboration meeting | Stony Brook University | October 2012

Setup

Gas

: Ar+10% CO2

Preamp

:

Ortec

142B

Amp

:

Ortec

472A

MCA

HV mesh: 520 VHV drift: 750 V

Slide10

Bxy2 : Second batch (september 2012)Contact with SERITEC (Switzerland)Stretching with a tension of 15

N.cm| PAGE

10RD51 Collaboration meeting | Stony Brook University | October 2012

3 detectors

delivered

at Saclay at

the beginning of september

Slide11

Measurements by Elvia / cirea | PAGE 11RD51 Collaboration meeting | Stony Brook University | October 2012

MOhms

One

measure

every

10

strips

average

F1

F3

F4

F1

F3

F4

500 V

71 nA65 nA

25 nA600 V

85 nA82 nA

30

nA

700 V

98

nA

127

nA

41

nA

800 V

111

nA

unstable

68

nA

850 V

150

nA

unstable900 V

160 nA

1 kVunstable

Slide12

Elvia / cirea detector section| PAGE 12RD51 Collaboration meeting | Stony

Brook University | October 2012

PCB multi-layer

Resitive

bulk

XY section:

pillar

449 µm

201 µm

187µm

Nominal

numbers

Coverlay

: 64 µm

Amp

gap: 128 µm

Pillar

above

mesh

: 64 µm

Total

pillar

height

: 192 µm

Resist

.

thickness

: 35 µm

Mesh

: 45/18 µm (30 µm)

9

7µm

38 µm

355 µm

r

esistive

strip

wires

Slide13

Reception in saclayF1

F3F4

500 V27 nA

31 nA24 nA

 12 nA

750 V40 nA100/200

nA40 nA

 20 nA900 V

200

nA

(2 µA)

overflow

950 V

overflow| PAGE 13RD51 Collaboration meeting | Stony Brook University | October 2012

The mesh is well

stretched (no more waves)Voltage test in air far

from the nominal values

Voltage test in gas improved (few nA at

500/600 V)

drying

?

Slide14

First gain measurement on F4| PAGE 14RD51 Collaboration meeting | Stony Brook University | October 2012

Without

source

With

source

Same

setup

than

before

HVm

: 580 V

HVd

: 780 V

Gain ~ 8000dE

/E ~ 26 %

6 keV

Slide15

F4 after washing

Washing

in pure waterNitrogen

dryingOven

curing

(50°C) for one night | PAGE

15

RD51 Collaboration meeting | Stony Brook University | October 2012

HVm

: 550

HVd

: 650

Gain: 7500

dE

/E ~ 18%

Transparency

Slide16

The other detectorsSame washing program than

for the F4 but no improvement

Visually the

mesh seems

to be not

attached to the pillars

except in the corners

| PAGE 16

RD51 Collaboration meeting |

Stony

Brook

University

|

October

2012

F1

F3

Slide17

ConclusionDiagnosticMesh floating on

two of the detectors due to a lack

of insolation  the

pillars are not attached to the plane of

stripsThe

coverlay is not

enough cured

except for the F4 

oven

malfunctionning

Very

promising

The detector F4 is ready to operateMesh stretching problem is

solvedResistivity

is

homogenous

Fine tuning to improve the

process

(insolation time and

coverlay

curing

)

What

next

?

2

operational

detectors are

still

needed

for RD51 (

already in the

working flow)

Large PCBs (1 and 2 x 0.6 m2

) have been ordered

Next step

: larger size

| PAGE

17

RD51 Collaboration meeting | Stony Brook University | October 2012

Slide18

DSM IRFUSEDICommissariat à l’énergie atomique et aux énergies alternativesCentre de Saclay | 91191 Gif-sur-Yvette CedexT. +33 (0)1 69 08 39 65 |

F. +33 (0)1 69 08 56 69Etablissement public à caractère industriel et commercial | RCS Paris B 775 685 019

| PAGE

18RD51 Collaboration meeting | Stony Brook University | October 2012

Thank

you

!