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
Download The PPT/PDF document "Resistive bulks industrialization" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Resistive bulks industrialization Status report
2 october 2012
Fabien Jeanneau
| PAGE 1
RD51 Collaboration meeting | Stony Brook University | October 2012
Slide2Industrialization 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)
Slide3Elvia / 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
Slide4first 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
Slide5BXY1 : 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)
Slide6BXy1 : 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
Slide7Bxy1 : stretching of the mesh | PAGE 7RD51 Collaboration meeting | Stony Brook University | October 2012
~ 1 °
Microscope
measurements
Slide8Bxy1 : 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
Slide9Bxy1 : 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
Slide10Bxy2 : 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
Slide11Measurements 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
Slide12Elvia / 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
Slide13Reception 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
?
Slide14First 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
Slide15F4 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
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
Slide17ConclusionDiagnosticMesh 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
Slide18DSM 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
!