Transcript Presentazione di PowerPoint - Istituto Nazionale di Fisica

Final results of the Trigger Test on the 25ns beam
HH
HH
HL
HL
Trigger efficiency on isolated tracks
LL
LL
Bx NUMBER
Trigger efficicency on double tracks
Fraction of Triggers
of different quality
Time resolution
at 20 degrees
The Minicrate is capable of generating its own standalone Level 1 Trigger.
This feature is important in the synchronization phase in UX and for cosmic
rays test in SX.
A test was done with cosmic rays in Legnaro : we found that asking for HH
Quality Triggers the efficiency of the reconstruction from TDC data
of the parent track is larger than 99 %.
The chamber resolution is clearly a bit worse (~ 400 micron instead of the
usual value of ~ 200) due to the time resolution of the Minicrate (25 nsec/sqrt 12,
coming from the 40 MHz clock)
60% of the chambers has been produced in the three operational
sites, the full lot will be completed around mid 2005.
115 chambers (full lot is 210) are already at CERN
Superlayer production in Aachen,CIEMAT and Legnaro is going on smoothly
at the usual rate corresponding to 19~ 20 chambers per year (nominal is 18)
80
150
Aachen
Cambers produced
Total Superlayers produced
Chambers OR 3 Fully Tested SuperLayers
Madrid
100
Padova
50
0
1/1/2001
1/1/2002
1/1/2003
Date
1/1/2004
70
Aachen
60
Madrid
50
Padova
40
30
20
10
0
1/1/2001
1/1/2002
1/1/2003
Date
1/1/2004
40 chambers (80 Superlayers, of the largest MB4) have to be
produced in Torino.
Torino completed the assembly of the tools and tables and is now
Ready to start.
A first dummy Superlayer was assembled successfully
We expect to be able to make a sound production plan in the
MU Barrel Week in Aachen at end of April.
I-Beam tool
First array of glued I-Beams
2nd AL plate handling
Status of Torino MB4 Production Line
2nd layer glued: 1st measurement of wire position (no fine tuning of I-Beam
alignment, no check of single wires off tolerance (±100mm).
Wire seen by CCD camera
residual (micron)
residual distribution (micron)
150
100
50
0
-50
-100
0
Wire image
sw-reconstruced
50
100
wire number
Without any correction ,this is a good result,
nominally all the wires should be within 100 micron (fg)
[email protected]
An (optimistic) exercise for Torino wrt schedule V 34.0.
Assume that Torino produce 2 ch/month,starting June 04 (INFN Milestone), 10 work month/year
(20 ch/year, is the actual rate in the other sites)
End inst.window
chambers needed
available
1 Aug.05 (mag.test)
18 (YB+2/+1/0)
23 (mid may)
1 March 06 (end SX inst.)
30 (YB-2/-1)
33 (mid Dec.)
Sept.06 (end UX Inst)
40 (sect. 1 and 7)
40 (mid april 06)
MB1P
23
12
11
23
23
 FE
Cables,
cooling
0
MB1M
9
5
4
9
6
0
9
MB4/9,11
4
2
2
0
0
0
4
All MB1/4
36
19
17
32
29
0
36
MB2P
28
12
10
22
22
10
18
MB2M
10
5
5
10
10
0
5
MB4/10 L
3
2
1
0
0
0
3
MB4/10 R
3
2
1
0
0
0
3
All MB2/4
44
21
17
32
32
10
29
MB3P
23
9
9
18
18
15
23
MB3M
10
5
5
10
10
0
10
MB4/4
2
0
2
0
0
0
2
All MB3/4
35
14
16
28
28
15
35
Type
@ISR
Align
L
R
HV/Gas
HV
Cable
CR
TEST
23
April 7, 2004
Captions:
HV/Gas: the chambers are equipped with HV cables for the  Super-Layers, gas pipes and gas
manifold on the HV side
HV Cable: the connectors are soldered on the HV cables for the  Super-Layers
 FE Cable: the chambers are basically ready to install without minicrates apart for HVB
In addition we have exchanged HVB_I apart for (20Ch boards) on 5 MB3, 5MB2, 2 MB4/10,
2 MB4/4 and 1 MB1
The bare chamber is aligned,than cabled and gas piped,the last
operation,just before installation, is the installation of the cooling
pipes and Theta FE cable.All the chanbers passed the Cosmic test.
As you can see 104 ch were measured on the Alignment bench,and
89 are ready for the last step of dressing. The last step was done for the chambers
ready for installation.
Chambers ready for installation at ISR
Chambers on the frame for transport
from ISR to SX
The break down occurs only in the outer layers , across
the brown channels. The lines carrying the HV for the
wires (3.8 KV) are at their center.The inner layers carry the HV for cathode and strips.
1st generation good board failure
Top view
Failure of Jan 04 after three
Months under HV and 6 months
under gas flow and no HV
1.5 mm
Channel opened by the discharge
Cross section
Outer Prepreg no flow
FR4
Inner prepreg flow
Reason of failure: the critical
adhesion of the prepreg no flow
to the FR4.
The defect,that appeared in few per mil of the installed boards after
a long operation time (long for a test,but short compared to the CMS
life), was unexpected and its probability is not predictable,
and no way was found to pick up potentially critical boards.
The only solution is to produce new boards in which
no use is made of prepreg no flow (the flow prepreg in the inner
layers never failed,even in bad boards) and contact between the outer
layer and the gas is avoided.
To obtain this goal the new boards have two more layers.
The new PCBs have been already designed and ways to produce a
full lot of 11000 have been found.
We expect to have a first lot of new boards available in September
to equip the chambers to be installed in YB+1 in fall 2004.
However this cahnge of design will require the substitution of the
boards in all the assembled chambers and in a large fraction of
those to be assembled.
CROSS SECTION OF OLD and NEW HVB
In this layer are the distribution lines of HV
to the wires and the pads to sold components:
Resistors,capacitors and connection wires
In this layer wires connections
only
insulation
“Prepreg no flow”
WIRES 1
STRIPS 1
“Prepreg flow’
CATHODES 1
CATHODES 2
STRIPS 2
“Prepreg no flow”
WIRES 2
1,2,3rd generation boards
NEW BOARDS
Flow prepreg
Soldering pads in the new outer layer