Tracker Alignment System Progress 3dimensional position control QM validation of Laser hardware 1

1
Tracker Alignment System Progress3-dimensional
position controlQM validation of Laser
hardware (1)

• W. Wallraff, RWTH Aachen
• AMS TIM
• CERN Geneva
• July 24, 2006 v1

HDwbk/Users/wolfgang/Desktop/TAS_at_wbk/gtTASpresentat
ions/66948608 Jun 28 1026 28vi06_TASACams_1.ppt
2
TAS components
TAS properties Light weight (3 kg) Low power (lt
0.1 W) Fast data taking (20s) Highly accurate (lt
5µm)
On TRD M-structure
Low power laser diodes 100 nJ pulses are
sufficent for observing signals in 8 successive
layer
Antireflective coating mandatory nSi 3
3
TAS optical system components
In a laser run any 2 from the 10 Laser diodes can
be activated firing 8 fibres from 40 resulting in
laser signals on 4 of the 5 AR ladders
The activation pattern determines whether the
beams go up or down
Flight Spares (20)
4
TAS control (at RWTH) with AMS flight software
thanks to Alexei L.
5
LFCR driven by LDDR (RWTH electronics)
LFCR produces 2 x 4 Laser Beams
6
Laser Beam Port Box
from LFCR
LBBX (EM) protruding 9mm above the the tracker
outer plates
no shear protection of fibre and ferule
bottom/top plate
to tracker
7
LBBX vertical position (upper plate)
b) along y
mech. model upgrade !!
a) from above
c) head space between uToF LBBX
8
LBBX shear-off protection
A local test (EPWW, 27iv06) at Geneva university
on one of the existing outer plates showed that
the minimum additional distance required is .3 mm.
LBBX feedlines shall be equipped with shear-off
protections for pre-venting fibre damaging during
ToF installation
LBBX bodies will be sticking out 1 more
millimeter from the surface of the outer tracker
plates
It was concluded, that this is acceptable, even
if the present version of our mechanical models
do not allow interface checks at this level of
accuracy
9
Diaphragm test
There will be no readout of any mounted tracker
ladder up to the finished instal-lation into the
detector
The diaphragm test has to rely on separate Laser
beam diagnostics
10
plane 4 dressed
Laser access
8
9
7
10
6
From Divic 24x05
11
LFCR EM12
EM2 used for system test
LFCR box grounding Connected to M- Crate
diode fibre coupler housing (electro optical
adaptor) made from titanium now
1 to 4 splitter
12
Vib TAS profile recording 0b
preliminary holder
glass diffusor target
beam tube
repeatable precision positioning
13
LFCR 1 on AC vib table (02vi06)
LBBX fixation
to power meter
LFIBs to LBBX
1 of 2 lasers on 1 slow (bolometer) 2 fast
(digital video) output power monitors
14
Vib set-up (vips 19vi06)
consumer electronics hardware software for
recording 8bit, 25 fps, interlaced .avi /
.bmp
diffusor
CCIR video camera S/N ratio 60dB with
demagnification lens
distortions, linearity, compression artefacts,
tests required
LBBX 1
SPECTRAL RESPONSE CHARACTERISTICS
LFCR 1
vibration table
15
Vibration set up for varying view points
being replaced by daylight cut-off filter
light weight daylight shield
current work sites
SONY CCIR mono 560 line TV camera (8.6 x 8.3
mm2) 50 hfps 60dB S/N macro lens diffusor (B)
marginally stable detector support
composite video display of SONY
3326x2504 5.4 x 5.4µm px (18 x 13.5 mm2) 64dB dyn
Bayer (A)
16
LFCR laser diode optics
QM base material Titanium
QM 2 Dallas sensors
1 to 4 splitter
17
Sine Sweep Response Random
18
Observations during Vibration Test
ca. 80 s Sine sweep followed by 3.4 g and 6.8 g
random runs
1st inverted
1st of 2130
Intensity variations below detection threshold
hole punched for check
1st inv 2130
last of 2130
Percent level illumination changes can be made
visible
19
Sony beam profiles
20
Preparing for Alignment AMS Style
single shot simultaneous observation of 4 beams
Method A
21
large area high resolution IR beam diagnostics
mediumweight, 5.4 µm 3448 x 2574 pixel commercial
CCD camera 19.7 x 15.04 mm (produced in China
by Kodak Olympus)
22
Subthreshold Laser profiles
Beam profiles at 4 Laser currents observed with
the Olympus E500
Analysis Results in 2 - 3 weeks Beam centering at
5µm precision over an area of 2 by 1.5 cm ! No
compression artefacts
23
TVT preparations
Mechanics Optics (instrumentation
outside!) Vacuum Feedthroughs
24
TVT prep 1
25
Summary 28vi06
Successful vibration test (50 µm precision)for 2
LFCRs (30 of deliverables) (4 electro optical
couplers 4 fold splitters) and 1 LBBX (8
of deliverables)
Precision (5µm) beam profile analysis requires
more and better equipment (mechanics, detectors,
software,)
TVT test in preparation results, end September
26
weight reduction 2
The fibres inside the FC connectors have to align
with very high precision (lt 1µm)
Dallas sensor support
Laser control photodiode connector
fixation hole
total LFCR weight 350g
internal fibre support
fixation hole
fixation hole
electro optical adaptor casing machined from
titanium
EM to QM 30 weight reduction by improvement of
mech. design
LFCR frame (QM) with 1 coupler and no splitters
27
Ti optics
electro optical adaptor (1 OD) made from
Titanium
focusing control
fibre output (FC)
28
EM system test
Reasonable alignment for 3 out of 4 rays
converter target
LBBX
29
LFCR 1
6m fibre cables
LFCR (EM)
TAS system tests at SuK March 3rd, April 12th,
May 2nd 2006
LBBX (EM)
30
NIR testbench 08v06
Conventional Bolometer
A
Nonconventional IR detectors 3326x2504 5.4 x
5.4µm px (18 x 13.5 mm2) 64dB dyn Bayer (A) CCIR
mono 560 line TV camera (8.6 x 8.3 mm2) 50 hfps
60dB S/N macro lens diffusor (B) 352x288 6 x
6 µm px (2.2 x 1.8 mm2) 30fps 45dB S/N Bayer (C)
B
ILX 3800
C
LFCR 1
LBBX 650
LBBX 1
31
Tests _at_ RWTH
lightweight, lowcost 6 µm 352 x 288 pixel CCD
camera 2.2 x 1.8 mm (from China)
Beam profile tester RWTH Aachen
AMS-01 LFCR
Laser optics support and fibre feed
small area but probably sufficient Laser profiles
have been recorded
32
IR profile and 2D interference pattern with GSE
AR Si sensor
Screen shows IR laser profile with interference
patterns from the AMS Si sensor (AR!!) readout
strips
Beam profiler support (v0)
33
Order of Modules in M-Crate

• The Laser Electronics is located in M-Crate
• It consists of 6 boards
• 5 LDDR (laser diode driver)
• 1 LCTL (trigger distribution)
• Each LDDR drives two laser diodes
• The Laser system is controlled by two USCMs
• There are 3 additional modules in M-Crate
• 1xGPS module
• 2xASTE

34
Block Diagram of LDDR
35
Status of the LDDR Boards

• A full set of LDDR and LCTL QM2 has been produced
  and electrically tested
• The Vibration (TVT) tests are about to start (are
  in preparation)
• test procedure according to AMS2 rules
• test sequence vibration, TVT
• all test will be performed with power on
• the status of the boards will be controlled
  during the tests
• All parts for FM production are in hand
• The tests will include the M-crate and its
  backplane
• It is understood that the power supplies as well
  as the other units (GPS, Startracker, ) in the
  M-crate will be tested by the CERN AMS
  electronics group or subcontractors thereof.

36
Commanding 1
Function Testing of LDDRLCTL (soon with LFCR)
37
TAS summary
Summary AC 07vi06

• innovative nonintrusive 3D alignment control
  method (sigx/y 5µm, sigz 50µm)
• AMS is the technology leader in Laser alignment
  control Its approach has been adopted (after the
  AMS-01 success) by the largest Si detector on
  ground CMS at the CERN LHC
• Can be used even if the standard readout is
  unavailable
• prototype for IR profiling in the tracker
  environment developed
• (not using the Tracker electronics), may be
  used for tracker stability verification
• after mechanical operations.
• Laser intensity very low, no danger for
  astronauts
• QM hardware is available now for Vib TVT
  tests.
• LFCR1 has been accepted. No power changes were
  detectable in vibration.
• flight hardware expected to be completely
  delivered by ix-06 (tests ?)

38
LDDR Board

• Power consumption of LDDR
• digital part 5V_at_ 170 mA
• analogue part 5V_at_ from almost 0 to 200 mA

39
LFCR splitters fixed on TRD M (under MLI)
EM German Silver
To LBBX on upper (lower) tracker flange
QM Titanium
From LDDR in M-Crate
40
ARwafer
AMS alignment Si sensors Double sided 110(27.5)
µm y (B) Readout/metallization(implantation)
pitch 208(104) µm x (B) readout(implantation/me
tallization) pitch (ohmic side) high resistivity
(gt6kW) 300 µm thickness Biassing by punch through
low rate, low rad. load (i.e. LEP style)
design 8m2
2000(40) sensors (AR) the largest operational Si
detector built so far
41
weight reduction
Dallas sensors
QM 2 193 g
EM 3 241 g
Diagnostics Driver
Fibre output (FC!) Caps will be wired together
42
LBBX EM
LBBX front
Mirrors (Au on ceramics)
LBBX back
43
LBBX QM
LBBX in between tracker ToF
Shear protection baignoire interface will be
checked by E.P W.W. later this week
ToF envelop including MLI ? (in tracker center)
44
Baignoires for LBBXs
Delivery first 2 LBBX end April. 2006
on Tracker Outer Plate
Conical flanges modified (IPT Aachen), shipped to
Geneva June 2005 trial assy with inner- end
plates.
Check here !
IR feed lines
45
Laser beams out of outer plate
Outer plate seen from the inside of the tracker
46
TAS beamholes (roads)
2 lanes/road
6.75mm
10.5mm

4
3
47
Time line
Updated by ww 25 iv 06
LBBX from SuK EM (including test
gear) 03iii06 TVT1 (RWTH, including signal
transfer out of vac.) 15v06 Vib 01vi06 T
VT2 08iv06 check on inner tracker
gt01vi06 FM production (lot
1) 24v06 FM lot 1 tests 23vi06 FM
production (lot 2) 17vii06 FM complete test
with flight fibres and
LFCR/LDDR 01ix06
48
LFCR timeline
LFCR from SuK EM (including test
gear) 03iii06 from SuK QM 11iv06 TVT1
(including signal transfer out of
vac.) 18v06 Vib 19v06 TVT2 01vi06
check with LFCR M - crate 19vi06 FM
production (lot 1) 24vi06 FM lot 1 tests
23vii06 FM production (lot 2
) 28vii06 FM complete test with flight
fibres and LBBX 01ix06