Present: J.C. Clemens, G. Darbo, K. Einsweiler, M. Garcia-Sciveres, D.
Giugni, C. Glitza, J. Grosse-Knetter, V. Kostyukhin, G. Lenzen, A. Rozanov.
1.
Last batch of
Repaired and New Bare Staves:
-
Logistics
(Comelec, Joule Test, & Survey, Distribution to Sites)
-
Qualification and
acceptance for loading.
2.
Loaded staves:
status of the QC and readiness of last loaded staves
3.
Bare Staves and
Available Modules -> Loading
-
Distribution of
Bare staves to sites: which ones and how many
-
Module available
in the 3 loading sites:
-
Plans for loading
completion.
4.
Readiness of
Loaded staves for integration
-
Pipe inserted
staves
-
New pipe staves
5. Comparison of Thermal measurements between sites to cross-calibrate
DT/W
6. Update on Integration Issues (Danilo).
7. A.o.B.
There are 12
repaired staves and 12 IVW staves ready at CERN to be sent to Comelec. All the
repaired staves are qualified: 4 are BL, 6 L1/L2 and 2 ~L1/L2. The
qualification cuts are given by the torsion values (<0.32 for BL and
<0.50 for L1/L2). The IVWÕs must Joule tested in Genova. Danilo also
reported that the survey made at CERN gave a very high value of the torsion
angle (~1.5) for 4 IVW staves, all on C-side. He suspects that survey was
wrong: the staves will be surveyed again in Genova.
Jocelyn will take the 24 staves to Comelec on Monday the 7th of August. If they will be ready on Thursday the 10th, Damien Tezier from CPPM will fetch them at Comelec and bring to CERN. He will then transport, the selected for loading in CPPM, to Marseilles. If the staves will be ready only on Friday the 11th the transport will be made by Logistics (organized by Eric/Sasha). In this last case the staves will appear at CERN the evening of the same day.
A total of 71
staves with new pipe are loaded. 10 Staves have been loaded since the last ID
week. 15 staves are still needed to complete the detector. Out of the 10
staves, one in Genova and one in Marseille need to be qualified, while the 2
loaded in Wuppertal still need to complete the qualification test.
Giovanni tried
to have summary picture of the available modules in the 3 sites: see
http://www.ge.infn.it/ATLAS/SQTF/Minutes/Minutes_06-08-03_aux/06-08-03_GD_SQTF.pdf.
According to his
evaluation there are (after the shipment made from Bonn, Dortmund and Siegen):
-
Genova:
12 BL + 46 L1/L2 (that include ~35 recoverable modules). The numbers from
Genova need a confirm/check.
-
Marseilles: 40 BL + 27 L1/L2. Jean Claude gave a slightly different value: 38
BL + 32 L1/L2.
- Wuppertal: 77 BL + 3 L1/L2. Charlie said that he has 84 modules of which 9 are in the hospital. About all are BL.
The result is that there are about 15.7 equivalent staves in number of modules. A previous counting gave a number near to 19 staves, but there were many modules to be assembled, repaired, etc that was in the count. A new counting is needed when Attilio will be back from Holiday (next week).
Loading activity will be stopped in CPPM next two weeks (resumed 21/8) and in Genova next 3 weeks (resumed 28/8). Wuppertal is ready to start again loading as soon as staves will become available.
We decided to
distribute the repaired stave in number of 4 per site. The 4 staves with lower
torsion will go to Wuppertal and are qualified for BL. The other 8 will be
divided between Genova and Marseille. Last two (S4129 and S4134) have a torsion
above the qualification limits for L1/L2 and will be used only in case of
urgency if no better staves will be available from IVW at the time of loading.
The distribution
list is:
|
0.154 |
Wuppertal |
|
|
0.282 |
Wuppertal |
|
|
0.289 |
Wuppertal |
|
|
0.315 |
Wuppertal |
|
|
0.341 |
Genova |
|
|
0.360 |
Marseille |
|
|
0.364 |
Genova |
|
|
0.399 |
Marseille |
|
|
0.432 |
Genova |
|
|
0.497 |
Marseille |
|
|
0.508 |
Genova |
|
|
0.526 |
Marseille |
We went through the list of Pipe-Inserted
staves. There are 17 qualified for integration into the half-shell. Of the remaining
ones:
-
S4025: QC is OK – ship Bonn ¨ CERN
-
S4027: QC is OK (?) – ship Bonn ¨ CERN
-
S4035: QC is OK – ship Bonn ¨ CERN
-
S4048: replaced module, QC in CPPM: OK
– ship CPPM ¨ CERN
-
S4096: has WB problem - repair
-
S4018: module fail – ship Bonn ¨ CPPM
-
S4067: module fail – ship Bonn ¨ CPPM
-
S4021: fail M5C – ship CERN ¨ CPPM
-
S4066: fail M6A, M5C – ship CERN
¨ CPPM
-
S4098: fail M0 – ship CERN ¨ CPPM
-
S6060: fail pipe, recuperate modules
– ship CERN ¨ CPPM
-
S4078: MCC encapsulated – ship
CERN ¨ Bonn
There are also several that have one or
more modules with thermal performance above the limit of 2.5 ¼C/W. The list of
the ones with the QC-0030 available is:
http://www.ge.infn.it/ATLAS/SQTF/PipeInsertion/QC30/PipeInsertionSummary.xls
From the list there are 3 that have to be
considered more seriously before using in the half-shell:
-
S4043: DT/W = 2.55/3.01 (Mean/Max)
– sub-judice
-
S4055: DT/W = 2.63/2.93 (Mean/Max)
– sub-judice
-
S4096: DT/W = 1.63/2.80 (Mean/Max)
– sub-judice
(note: the above list is
different from the one that I proposed during the phone conference, I went
through all the QC again. If objections please comment)
Here the situation is more stable. Danilo
is selecting staves with a ranking above 2000 for L2 integration. One stave has
a module to be replaced:
-
S4122: fail M2A – ship CERN ¨ CPPM.
PDB should be on track with production
status. A summary of PDB information is kept in the file that Giovanni updates
periodically:
http://www.ge.infn.it/ATLAS/SQTF/StaveProduction/StaveRankingReport.xls
Jean Claude had
no news to report. He has already compared a stave measured in Genova and CPPM
(S4075). He will do thermal test for the pipe-inserted staves that will be sent
to CPPM for module replacement. For the moment no stave with new pipe made in Wuppertal
is available in CPPM for comparison.
Danilo briefly
reported the status of integration. Each L2 half-shell (Top/Bottom) has 6
bi-stave. Bi-stave cabling will be slowed down because of missing cables and pipe-inserted
staves. It was decided to complete first one half-shell instead of going in
parallel as was till now (to release space in SR1).
Integration is
in advance of schedule of ~2 weeks.
Next
SQTF phone conference will be held on Thursday 17th of August 2006
at 16:30.