Post on 03-Jan-2016
Installation Review
March ‘03
L.Simonetti – INFN Torino1
ITS - FWD - beam pipe installation
Elements considered ITS (=SPD+SDD+SSD), FWD (=V0R, T0R, FMD-Si1, FMD-Si2), CS (=Central Section
of beam pipe (4.82 m long))
Topics Major
constraints Tests prior to
installation Installation
sequence Planning Man power CERN
infrastructure use
Fault tolerance
RB24 side RB26 side
PMD FMD-Si3 FMD-Si2 FMD-Si1
FrontAbsorber
SPDT0L T0RV0L V0RSDD SSD
beam pipe Central Section
RFvalve
Installation Review
March ‘03
L.Simonetti – INFN Torino2
ITS - FWD - beam pipe installation
Major constraints Presence of -absorber on RB26 side: forces asymmetric installation Small clearance SPD – CS-pipe (5 mm): forces specific assembly of
SPD (no SPD sliding over beam pipe) Minimum material budget: all services have to be connected at both
ITS ends
ConsequencesComplex and rather long installation procedureSeveral installation approaches have been studied during three
years. The present solution is being pursued by: testing the details on a full-scale installation mock-upregular discussions within ALICE and with the beam pipe group
AT/VAC has the responsibility of all the operations on the pipe and on its support and bakeout shell
Installation Review
March ‘03
L.Simonetti – INFN Torino3
Pre-installation and functional tests
Tests prior to installationMechanical
With the installation mock-upWith the final ITS+FWD+pipe mechanics and tools, with the
actual detectors weights, and with the real TPC: final test in SLX2 between July and December 2004Space requirement : a ~6-8 m long area corresponding to the RB24
side for the (dummy) beam pipe installationTools requirements: dummy beam pipe with accessories (bellows,
flanges, valve); dummy front absorberElectrical / electronics / cooling
Individual sub-detectors test upon arrival at CERN ITS re-tests will be performed in the Si-lab in Meyrin (build. 186)
with individual sub-detectors and with SPD+SDD+SSD assembled together (final effectiveness test of grounding scheme and of sub-detectors EM screens)Space requirement : for the detectors (4x4 m2 for each SPD, SDD,
SSD); for the the racks (power supplies, cooling, DCS, shoe-boxes); for the computing (2 workstations per detector); in total about 75 m2
Installation Review
March ‘03
L.Simonetti – INFN Torino4
Installation step 1. (6 days) (all durations assuming 1 shift / day)
Assumptions before starting ITS installation:The beam pipe in the Front Absorber (RB26) is already leak-tested and refilled with
N2; its flange is available at the nominal coordinates out of the Front AbsorberThe TPC is at 4.5 m from the
int. point (IP) on the RB24 side (opposite to the absorber)
The 4 fixation plates (C1…C4) of the ITS rails on the TPC are pre-assembled so that they will become aligned when the ITS will be coaxial with the TPC at the end of the installation.
First installation stepInstall and align (survey) the
ITS rails so that they are 1 mm below the nominal beam axis (to minimize the displacement of beam-pipe bellows while linking ITS to TPC)
On the absorber: rails held by remotely actionable jaws TPC/C1
TPC/C2
TPC/C3
TPC/C4
L3
4.5
m
IPFront
absorber
ITS rails
jaws
Installation Review
March ‘03
L.Simonetti – INFN Torino5
Installation step 1.
C1
C2
C3
C4
Rail for ITS
Rail for beam pipe
Rails for ITS services
C4
C3
Installation Review
March ‘03
L.Simonetti – INFN Torino6
slide ITS through the TPCResponsibility ALICESlide up to 1.56 m from the IP
(place for FWD & SPD)
IP
1.56
m
Install beam pipe on ITS railsResponsibility AT/VAC5 m long temporary support
needed on RB24 sideAlign beam pipe with rails
Slide beam pipe to absorberResponsibility AT/VACSurvey beam pipeConnect to absorber flangeBakeout and leak test (9 days) Refill with clean gas (N2)
Install outer ITS (=SDD+SSD) on railsCrane lowers ITS underground; align it to the rails (and/or external references),
Installation step 2. (a) (13 days)
Installation Review
March ‘03
L.Simonetti – INFN Torino7
Section 1
Beam Pipe
Support Structure
Section 3
Section 2
Section 4
Installation step 2. (b)
beam pipe linked to front absorber flange
adjustment tools to compensate sagging
The 4 sections of the support and bakeout shell supports and protects the beam pipe Central Section (Be) during the different installation steps
CMS experiment bakeout shell
Beam pipe
Section 1
Section 2
Section 4
Section 3
Beam pipe support
RF valve support
RF valve
Installation Review
March ‘03
L.Simonetti – INFN Torino8
Installation step 2. (c)Section 1
Section 2
Beam pipe
Beam pipe support
RF valve support
RF valve
Section 1
Section 2
Section 3
Section 4
Installation Review
March ‘03
L.Simonetti – INFN Torino9
Section 1
Installation step 3. (4 days)
Install V0 and T0 on RB26 Responsibility ALICE Each half V0 and half T0 are pre-
assembled together to save time during installation in pit.
V0 and T0 are fixed to the absorber
T0
V0
V0
T0
beam pipe bellows
T0 V0
Remove section 1 of beam pipe support Responsibility AT/VAC 45
º45
º
Cabling and test of V0 & T0
TPC/C4
SDD
SSD
Installation Review
March ‘03
L.Simonetti – INFN Torino10
Install temporary support It’s made of 2 halves; the upper
one is brought into position through rotation about axis “A” (to avoid risks for the beam pipe)
It has 4 flaps (“B”) at ±45º for fixation of beam-pipe and SPD supports prior to transfer their load to ITS
Align (survey) temporary support to the beam pipe
A
BInstallation step 4.
(3 days)
A
Installation Review
March ‘03
L.Simonetti – INFN Torino11Dummy 3rd cone
FMD – Si1
Installation step 5. (4 days)Fix support for beam pipe and
FMD (“3rd cone”) to temporary support The 3rd cone is made of two
halves containing the FMDs lifting tools allow for slow and
accurate positioning of 3rd cone Spoke structure reduces
material in front of FMDs and allows for visual inspection
Test FMDs FMDs have pigtails up to the
outer edge of the 3rd cone
Lifting tool
Remove 3rd cone lifting tools
Installation Review
March ‘03
L.Simonetti – INFN Torino12
Installation step 6. (2 days)
Lifting tool
First Beam Pipe Support
Mount and adjust monitoring system of bellow movements Responsibility ALICE Non-touching capacitive
sensors are proposed
Bellows
Flanges
Detectors
Beam Pipe Support Adjustment
Third cone FA
Mount and adjust 1st support to the beam pipe Responsibility AT/VAC Survey
Installation Review
March ‘03
L.Simonetti – INFN Torino13
Section 2
Install the two SPD half-cylinders (Resp. ALICE) Two half cylinder/cones Specific installation tools
are being designed SPD services (cables,
fibres & capillaries) are pre-assembled in the cones
SPD services
Remove section 2 of beam pipe support (Resp. AT/VAC)
Installation step 7. (8 days)
Fix the two, coupled, SPD half-cylinders to temp. support, above the 3rd cone, using a 2nd series of bolts & precision plugs
SPD fixed in cantilever mode to temp. support, SPD pigtails on RB24 side unconnected
3rd cone
SPD cone
Temporary support
Installation Review
March ‘03
L.Simonetti – INFN Torino14
Slide outer ITS onto SPDs (Responsibility ALICE) Transfer load of SPD and 3rd cone (beam pipe) from temporary support to ITS
Installation step 8. (7 days)
Mount and adjust 2nd support to the beam pipe (resp. AT/VAC) Survey
Outer ITS, SPD & beam pipe are now an integral unit
TPC/C4
Temp.Support
SPD
SDD
SSD
Connect SDD and SSD on RB26 sideFinal fixation of SPD pigtails on RB24
side to ITS cone
Installation Review
March ‘03
L.Simonetti – INFN Torino15
The dedicated support structure is being designed, to fix FMD-Si2 to ITS The temporary support used on the RB24 side can also be used on the RB26
one for the installation of FMD-Si2
FMD detecotorFMD detector
Installation step 9. (3 days)
Remove section 3 of beam pipe support (Resp. AT/VAC)
Section 3
Install FMD-Si2 Also FMD-Si2 detector rings are made of top and bottom halves
FMD-Si2
Installation Review
March ‘03
L.Simonetti – INFN Torino16
Installation step 10. (7 days)
Install chariot for ITS services on RB24 Assemble the two half-
cylinders of composite material, having the ITS services on them
CS beam pipe with its chariot
Patch panels for ITS and FMD-Si2
TPC Service Supp. Wheels
ITS service chariotCS beam pipe with its chariot
Patch panels for ITS and FMD-Si2
TPC Service Supp. Wheel
ITS-TPC links devices
Slide them through TPC while monitoring beam pipe bellows on RB24
connect ITS & FMD-Si2 services at the patch panels
Installation Review
March ‘03
L.Simonetti – INFN Torino17
Installation step 11. (0.5 days)
Lift ITS by 3 mm to prepare for TPC sliding to interaction point (using a contact sensor and viewed by camera during operation)
Remote control tools to operate the ITS lift tools on both rails in parallel
ITSITS lift tool
ITS
ITS –TPC link device
TPC
Installation Review
March ‘03
L.Simonetti – INFN Torino18
Installation step 12. (3 days)
CS beam pipe with its chariot
Patch panels for ITS and FMD-Si2
TPC Service Supp. Wheels
ITS service chariot
Slide TPC over ITS to interaction point Simulation of the TPC sliding showed
that vertical displacements are expected during this operation
Constant monitoring of the TPC absolute alignment and of the displacement of the beam pipe bellows on RB26 is required
Lifting tools are foreseen in the TPC to re-align TPC position to the nominal beam axis (see T.Meyer talk)
Removal of C4 link point between TPC and ITS rails when TPC reaches the Front Abs.
TPC/C4removed
TPC/C1TPC/C2TPC/C3
TPC/C4
ITS
TPC SSW
TPC ServiceSupport Weels
Installation Review
March ‘03
L.Simonetti – INFN Torino19
Installation step 13. (0.5 days)
Link ITS to TPC, so that TPC, ITS and CS beam pipe become an integral unit ITS is appended to TPC from its top; end-position of TPC sliding is detected by
appropriate electrical contacts ITS is lowered to the nominal position, i.e. one mm higher than the rails a plug at ITS bottom on RB24 side blocks ITS angular movements The link-devices allow for galvanic insulation of TPC from ITS
TPC
ITS
ITS –TPC link device connected on both TPC sides (top)
Installation Review
March ‘03
L.Simonetti – INFN Torino20
Installation step 14. (6 days)
Bend ITS+FWD services and temporarily fix them to TPC service wheel ; remove terminal half-cylinders of service chariot (not shown) (Responsibility ALICE)
ITS servicechariot
TPC service wheel Remove section 4 of beam pipe
support and bakeout shell Mount and adjust 3rd support to
the beam pipe (Resp. AT/VAC) The support is connected to TPC Survey needed
Remove beam pipe chariot
Installation Review
March ‘03
L.Simonetti – INFN Torino21
Installation step 15. (5 days)Lift ITS-service chariot from the ITS rails
Mount conical sections to the ITS-service chariot (to preserve PMD acceptance) and chariot lifting tools
Hang ITS-service chariot to the TPC Service Support Wheels (SSW) on RB24
Conical sections
Chariot lifting tools
Remove ITS rails
Free ITS rails on front abs.by opening the remotely
controllable jaws
Installation Review
March ‘03
L.Simonetti – INFN Torino22
Summary of installation schedule
In the present planning the ITS – FWD – beam-pipe installation starts on middle June 2006
Assuming one shift per day, and without parallelization of tasks, the present estimate indicates a overall duration of 15 weeks.
Installation Review
March ‘03
L.Simonetti – INFN Torino23
Commissioning
All the concerned detectors and sub-systems (power, cooling, monitoring) will be thoroughly tested during the construction phase After the construction, the ITS barrels will be operated for final
debugging for about 4-8 weeks ITS and FWD commissioning (sub-systems included) has to be
performed during the installation: no time to re-open the detectors for reparations. After FWD installation and after ITS installation, tests with pulser
will be performed The ITS will be tested after the RB24 service chariot has been slid
to the final position (turn-on requires the cooling system to be functional)
Some monitoring of individual subdetectors is possible during installation (e.g. during nights), to ensure regular operation, without increasing the already long installation time. The appropriate temporary connections are currently under study
Any intervention to the FEE and the detectors is excluded
Installation Review
March ‘03
L.Simonetti – INFN Torino24
Survey and alignment
Survey of the working position See installation sequence before For all the sub-detectors: whenever the positioning capability of the
installation tools cannot guarantee the knowledge of the detector positions within ± 0.1 mm (Still to be defined )
Monitoring during the installation and operation Monitor of the beam pipe bellows on the RB26 side : continuously since
the installation of the 1st CS beam pipe support Monitor of the clearance SPD – beam-pipe : continuously since the
installation of the half-cylinders Monitor of the TPC absolute position: continuously since its sliding-in to
the interaction point Monitor of the ITS-TPC relative position: continuously since the arrival of
the TPC on the interaction point
Installation Review
March ‘03
L.Simonetti – INFN Torino25
Maintenance and access in the future
Accessibility of the various elements All the considered detectors can be accessed only after the removal of the
TPC (operation which implies several weeks) Time estimates for various exchanges/repair of critical elements
Careful intervention ITS / Forward detectors during shutdown 3 months would allow sufficient time for major repair operation
Access for bake-out - Alice detector fully operational 5 to 6 weeks (depends on the extent of commissioning)
Fast access for bake-out - Alice detector not operational 2 to 3 weeks possibly even faster
Fault tolerance ITS sub-detectors are rather highly segmented for both the power supplies and
the cooling system (each segment corresponds to few% of the acceptance), so in case of fault leading to shutdown of one element the loss in acceptance would be tolerable
FMDs, particularly the FMD-Si1, will embody as much redundancy as possible. All the sub-detectors have spare parts ranging from 10% to 20% The monitoring tools installed within the TPC body will have redundancy.
Installation Review
March ‘03
L.Simonetti – INFN Torino26
Personnel and resources
Personnel from the ALICE Institutes will be present during the pre-installation mechanical test (about 13 weeks for installation and 8 weeks for removal, from 7/2004) for the movements of the sub-detectors, their connections (cabling, cooling), etc.
Additional personnel from the ALICE Institutes will be present during the installation (about 15 weeks from 6/2006) for the functional tests & commissioning.
Personnel from the ALICE DCS, DAQ and trigger groups is needed during the installation for the first setup of the detector DAQ/trigger branches and then on-call
Personnel for the external cooling systems (ST/CV) is needed for the first setup of the detector cooling control system and then on-call
Installation Review
March ‘03
L.Simonetti – INFN Torino27
CERN infrastructure use
Road Transport In principle ITS needs only one transport, at the start of installation, from
the Si-Lab in Meyrin (build.186) to SLX2 :on a vibration-free vehicle for the barrelOn standard CERN transportation trucks for the several racks (power
supply, cooling, etc.) The total weight of the ITS barrel is about 100 kg
Cranes usage and survey CERN personnel for the survey and the crane operation is needed on
the basis of a detailed schedule that has to be prepared; Present very preliminary estimates for the survey indicate a need for
20% of the time both during the pre-installation mechanical test (13 weeks from 7/2004) and during the installation (15 weeks from 6/2006).
Need of the crane should be limited to few days during the same period