ITSAMS Installation September 26 2007
On September 23 2007 David Truesdale, Bjørn S. Nilsen and Lodovico
Riccati were able to install 2 of the 4 ITSAMS mirror assemblies. In
the evening of September 25 2007, they were able to install the other
two. Later that evening the final work on the ITS was done and the
SSD protective cover was removed. By the morning of September 26 2007,
the support platform was mostly removed, just one piece left to help
install the part which are used to move the TPC in place. These
pictures where taken at that time.
Here is a view, from just outside of the gate, of the CERN site Point 2
where the LEP L3 experiment used to be and now where the ALICE detector
is being installed. In the center is the main building where the primary
access to the underground site is located and were all of the electronics
and control facilities are located for ALICE.
Here is the ALICE magnet with it's A side doors open. In front of it is the
blue Delphi frame used to support the TPC during installation. On that
frame is a platform with rails used to support the ITS and its A side
cables during installation. Around the TPC, which is pushed out to
give access to the ITS on the other side, is the Space frame where a few
TOF and TRD super modules have been installed and the HMPID is attached.
On the left side is where the EMCAL and its support structure will be
installed.
In this rather dark picture you can just make out the A side of the TPC
with the ITS support platform and rails. It on this side of the TPC that
the ITSAMS cameras will be installed.
Here, again in a rather dark picture, you can see the structure used
to carry the ITS down into the pit. This structure is connected
to rails which are in the TPC and are attached to the Muon absorber
on the other side. These rails will eventually be removed. The
plastic tubes are temporary water cooling line used by the SDD group
to test their systems while ALICE is in this practically assembled state.
Here, again in a rather dark picture, you can see the open end of this
ITS temporary support. At this end, small pins can be controlled to
rails or lower the ITS while it is in its final position. This allows
for the TPC to smothery travel over the ITS and easily connect to the
ITS via its support pins. The is also, at this end, a mechanism
which was used to move the ITS through the TPC into its final.
Viewed from above is the Patch panel 0.0 and 0.1 (i side?) as viewed
from above.
Here is the o side patch panel 0.2 and 0.3 also viewed from above.
Here is the front of Rack A12, where the SDD low voltage power supplies
are located, only a few shown which are wrongly marked as SSD. In this
rack the ITSAMS will have one 1" high rack unit.
here is shown the back of rack A12.
Here is shown the cards in the back of the low voltage power supplies
in rack A12. The ITSAMS will use two of these power supply modules in
one of the create in this rack.
Here is the left side view of the Installed ITS detector. The TPC c-side
is in plane view. The metal TPC cooling panels are shown to the left.
The ITS and its cable trays are on the right.
Here is the right side view of the Installed ITS detector. The TPC c-side
is in plane view. The metal TPC cooling panels are shown to the right.
The ITS and its cable trays are on the left.
Here is the right side of the installed ITS.
Here it the right bottom side of the installed ITS.
Here is the left side of the ITS as installed.
Here is the left bottom side of the ITS as installed.
The rest of this September 26th 2007 day is devoted to preparing the
for moving the TPC back to its final position. During the last few
cm, the ITS will be raised up so that it can be lowered onto the TPC
hooks. All during the TPC movement, to be done September 27th 2007,
a survey of the beam pipe location will be performed to assure that
there are no problems. Additionally, during the last few cm, a visual
inspection of the ITS and TPC will be done to make sure there are
no problems when the ITS placed on its final TPC mounting hooks.
After the movement has finished, we, the ITSAMS team, hope to get one
of the first opportunities to install at least 3 of the 4 camera
system. The 4th will have to wait until the TPC has been surveyed
in place. One of the survey rods is in the way of the installation
of camera 1.
More pictures to come.