# 08/03/005

# 

# Tracker Magnet Test and Cosmic Challenge 

(version 7)

> In this document we summarize the various activities foreseen to take
> place during the Magnet Test. As well, we present the plans of the
> various sub-detectors that will participate to the Cosmic Challenge.
>
> All detailed documents relative to this activity can be found at:
>
> <http://cmsdoc.cern.ch/cms/Tracker/html/TPO/MTCC/MTCC.html>
>
> We have identified two major classes of activities, the mechanical
> integration and the sub-detector system tests. The evaluation of tests
> to be performed in both cases suggests to keep them fully independent
> and to exploit different electronical equipment for the various
> activities.
>
> The MTCC will start with the insertion of the TK mock-up aluminum tube
> inside CMS. Next we will perform cabling exercises around YB0 and we
> will pre-cable a TEC mock-up sector. Finally we will participate to
> the cosmic challenge with TOB-TIB and TEC sub-structures.
> Simultaneously to the sub-detectors system test, we will verify the
> optical system which aligns the TK w.r.t. the Muon System, we will
> study the thermal efficiency of a fully equipped cable channel and we
> will verify the behavior of the LV/HV power supplies in magnetic
> field.

1.  **Mechanical Integration Activities**

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i.  **Tracker Insertion with and without ECAL in place**

> The Tracker mock-up aluminum tube will be inserted into CMS using the
> final insertion tool already tested in an installation exercise
> performed with the CMS maquette. The sub-detectors will be already in
> place inside the mock-up tube during its insertion. The TK mock-up
> will be equipped with the final cable supporting system and the cables
> from the various sub-detectors will be attached to it with temporary
> fixations. The final platform for placing the TK tube at the right
> height for the insertion into the vacuum tank is being prepared.
>
> The scope of this test is to verify:

-   The feasibility of the insertion of the Tracker

-   The correct handling of the services during installation

-   The feasibility of the insertion of an ECAL module with the TK
    already in place

> All the equipment is or in hand or in design/construction phase.

ii. **Tracker cabling exercise around YB0 and TEC pre-cabling**

> The cabling exercise around YB0 will be a complete exercise that
> includes the lay down of a cable channel from PP1 to the "balcony" (64
> channels will be present in the final configuration) . The cable
> channel will include LIC and control cables, pipes positioned in the
> final location, heating system and isolation material. Al MSC and
> pipes will be lay-down from PP1 to a bulk-head sector equipped with a
> TEC PP1 mock-up. In this region all the cables will be terminated with
> loads simulating the detectors. Power will be provided by final power
> supplies located in the balcony.
>
> The main goals of this test are:

-   To verify the possibility of pre-cabling the TEC and the feasibility
    of the insertion of an ECAL module with the TK cables in place

-   To evaluate the design of the cable channel and the heat exchange in
    the new running configuration ( -30 ^0^C, 85 m pipe length)

-   To evaluate the impact of a reduced insulation thickness on the
    cooling plant performances

-   To prove the absence of condensation along the cable path and in PP1

> The material needed for this exercises is listed in the table 1.

iii. **Alignment**

> No tests of the TK internal alignment system are foreseen for the
> Magnet Test. Only the optical system which aligns the TK w.r.t. the
> Muon System (LINK) will be tested. The test of the LINK system will be
> a joint effort of the TK and the MS alignment communities.
>
> The main goals of this test are:

-   To make one half of the LINK system operational in the real scale.

-   To study relative movements of the LINK components with switching-on
    of the B-field, and to conclude about sufficiency of the sensor
    dynamic ranges,.

-   To study the behavior of the sensors working in the B-field.

> The alignment Ring will be provided by the TK community while all the
> equipment installed on the Alignment Ring and on its support structure
> (collimators, tiltmeters, temperature and B-field probes, as well as
> there read-out systems) is a responsibility of the MS side.

2.  **Cosmic Challenge and System Tests**

> The three sub-detectors will be positioned inside the Support Tube
> such as to cover the region equipped by the barrel (sector 10 of YB1
> and YB2) and forward μ chambers.
>
> To be as informative as possible we intent to have set-ups as close as
> possible to the experimental situation, i.e. production modules and
> mechanical structures, final cables, power supplies and control racks
> positioned at the side of the magnet to simulate the final balcony
> position in the pit. This will give us a first impression of the noise
> and grounding requirements. As well we will collect information about
> the working in main and stray magnetic fields.

i.  **Sub-detectors mechanical lay-out**

> TOB, TIB and TID will exploit production modules and structures that
> will not, later on, be re-used in the Tracker. The TEC will re-use all
> the equipment in CMS. In table 1 below we summarize the maximal
> equipment foreseen to be used in the cosmic challenge by the three
> sub-detectors.

  ----------------- ----------------- ----------------- -----------------
                                      \# SS modules     \# APV

  TIB               layer 3 proto                       

  TID                                                   

  TOB               8 rods                              

  TEC               3 back + 3 front                    
  ----------------- ----------------- ----------------- -----------------

> Table 1. Equipment installed during the MTCC
>
> TOB and TIB/D mechanical structure and arrangement.....(fig.1)
>
> The TEC will have 3 back plus 3 front petals of disc types 3, 6, 9 in
> the maximal configuration. The absence of the beam pipe allows the
> variance of different petal types to obtain maximal information about
> the working of the different control rings and the noise distribution.
> All petals will be fixed in the lower part of a disk 9. The alignment
> disk 10 will protect the petals towards the bulkhead, whereas a simple
> carbon fiber disk will close it to the inner part of the tube (fig.
> 2). Bulkhead, D10, D9 plus a protection disk will be connected by
> several dummy service channels made in aluminum. These channels will
> also serve to support the TEC inside the support tube.
>
> ![](media/image1.png){width="4.280555555555556in"
> height="3.645138888888889in"} Fig. 2 The lay-out of the TEC disks,
> bulkhead and alignment ring
>
> The alignment Disc 10 will hold the alignment ring to the outside
> (fig. 2). The alignment ring will be supported by three pillars, which
> are glued to the D10. The bulkhead, also attached to D10, will have
> three holes to house the pillars and will have no direct mechanical
> contact with the alignment ring. The alignment ring will be equipped
> with six collimators which send laser beams toward the MS, three
> proximity sensors and two integrated devices each of which combine one
> 2D tiltmeter, one temperature probe and two 2D Hall probes (fig. 3)

![](media/image2.png){width="4.011111111111111in"
height="2.7645833333333334in"}

Fig. 3 Ly-out of the alignment ring

ii. **Infrastructure available and their exploitation:**

> *[Cooling:]{.underline}*
>
> Only a water cooling plant (\~18°C) will be provided by CMS
>
> TOB and TIB/D, will exploit water cooling for (note that both
> structures will not be final and therefore can afford to circulate
> water).
>
> TEC will install production petals. It is therefore suitable to use
> final coolant. A cooling plant running C6F14 should be provided.
>
> The cable channel will exploit a C6F14 cooling system. The cooling
> plant is available.
>
> *[Dry air circulation]{.underline}*
>
> We will close the support tube with a bulkhead on one side and a
> plastic sealing on the other such as a clean environment with high RH
> can be maintained. This will fulfill the requirement of the TOB and
> TIB/D. The TEC requires low RH but the mechanical design they will
> adopt includes a sealing such as dry air, in stand-alone, can be
> circulated inside. Same statement is valid for cable channel.

iii. **Electronics Integration and control**

> **Partitioning, controls et al.**

iv. **Quench related measurement**

> The power supplies will be positioned in place equivalent, from the
> stray field point of view, to the final location they will have in
> CMS. We suggest to monitor the behavior of the PS with the slow
> control system and, if possible, with the testing system used to
> qualify the PS before their procurement.
>
> We are evaluating the use of a RASNIK system to measure any movement
> of the different structures during quench!

3.  **Tracking**

> **Bla bla and what we can learn**

4.  **Schedule**

> A preliminary schedule for the Tracker activities during the magnet
> test and cosmic challenge is presented in figure 1. Items highlighted
> in green are extracted from the CMS schedule. Any activity of
> insertion of sub-structures inside the TK mock-up tube will happen
> after the completion of the TOB/TIB cabling exercise. Following these
> boundary conditions, and assuming one month for the insertion, testing
> and cabling of the sub-structures that will participate to the Cosmic
> Challenge, we set the sub-detectors ready for installation milestones
> for the month of July.
>
> ![](media/image3.png){width="6.301388888888889in"
> height="4.311805555555556in"}

5.  **Summary table with all the services and electronic request**

> The MTCC will take place from September to November, simultaneously
> with the integration activities of TOB/TIB/TEC. The equipment needed
> for these activities is listed in table 2. Equipment for MTCC should
> be procured in addition and it is listed in table 3.

  ---------------- --- ----- --------- ------ ----- ----- ----- ------- ------ ------- ------ ----- ------ ----- ------- ------- --------- --------- -----------
                                                                                                                                 multi     multi     

                                                                                                                                 ribbons   ribbons   

                                              9U    9U    VME   VME     SY     PS      PS           L/HV   CCU   MS      ctrl    (8 fib.)  (8 fib.)  

                       OEC   FED_PCI   mFEC   FEC   FED   LTC   crate   1527   crate   ctrl   48V   PSM    PSM   cable   cable   for FED   for ctrl  interlock

  TIB-D            1   6     10        9      1     2     3     1       4      9       9      9     46     7     92      4                           1
  sub-assembly                                                                                                                                       

  Pisa             2                                                                                                                                 

                   3                                                                                                                                 

                                                                                                                                                     

  TIB-D            1   6     10        9      1     2     3     1       4      9       9      9     46     7     92      4                           1
  sub-assembly                                                                                                                                       

  Firenze          2                                                                                                                                 

                   3                                                                                                                                 

                                                                                                                                                     

  TIB-D            1   6     10        9      1     2     3     1       4      9       9      9     46     7     92      4                           1
  sub-assembly                                                                                                                                       

  Torino           2                                                                                                                                 

                   3                                                                                                                                 

                                                                                                                                                     

  TOB              1                   3      1     4     1     1       1      2       2      2     11     2     22      3                           1

  (integration +   2                   5      1     8     1     2       2      4       4      4     22     3     42      5                           1
  Crack)                                                                                                                                             

                   3                   7      1     12    1     2       2      5       5      5     32     4     64      7                           1

                                                                                                                                                     

  TEC+             1                   1      1     1     1     1       1      1       1      1     2      1     3       1       1         1         1

  Aachen           2                   10     2     6     1     1       1      4       4      4     26     3     48      9       6         2         1

                   3                   10     2     11    1     1       1      4       4      4     26     3     48      9       12        2         1

                                                                                                                                                     

  TEC-             1                   1      1     1     1     1       1      1       1      1     2      1     3       1       1         1         1

  Lyon             2                   10     2     6     1     1       1      4       4      4     26     3     48      9       6         2         1

                   3                   10     2     11    1     1       1      4       4      4     26     3     48      9       12        2         1

                                                                                                                                                     

  Cosmic challenge 3                                                                                                                                 

                                                                                                                                                     

                                                                                                                                                     

  Total needed     1   18    30        32     6     12    12    6       15     31      31     31    153    25    304     17      2         2         3
  till March \'05                                                                                                                                    

  Total needed     2   0     0         25     5     20    3     4       4      12      12     12    74     9     138     23      12        4         3
  till June \'05                                                                                                                                     

  Total needed     3   0     0         27     5     34    3     4       4      13      13     13    84     10    160     25      24        4         3
  after June \'05                                                                                                                                    

                                                                                                                                                     
  ---------------- --- ----- --------- ------ ----- ----- ----- ------- ------ ------- ------ ----- ------ ----- ------- ------- --------- --------- -----------

> Table 2 List of material exploited by the Tracker integration

  ----------------------------------- ------ ------- ------- ------- --------
                                      TIB    TOB     TEC     YB0     total

  Alu MS cables                       2      8       12      25      ** **

  Cu LIC(?) cables                    3      8       12      36      **59**

  Optical ribbons                     4      12      24              ** **

  Optical cables (Erikson)            1      2       3               **6**

  DOHM + ribbon                       1      2       3               ** **

  CTRL optical cable                  1      1       1               **3**

  CTRL pwr cable DOHM section         1      2       3               ** **

  CTRL pwr cable PS section           1      2       1       10      **14**

  Power Supply Modules                2      4       12      18      **36**

  CTRL power channels                 1      2       3               **6**

  U9FEDs                              1      2       3               **6**

  mFECs                               0      2       3               **5**

  9U FEC                              1      1       1               **3**

  VME crates                                                         2?

  SY1527                                                             **1**

  PS branch ctrl                                                     **2**

  PS crate                                                           **5**

  48 V                                                               **5**

  TRIGGER boards?                                                    ** **

  interlock                                                  H&T     ** **

  PP1 & Optical Pannel                                               ** **

  Cooling line (=1in+1out)            2      2       3       3       ** **
  ----------------------------------- ------ ------- ------- ------- --------

Table 3 List of material exploited by the MTCC