M1 Status
G. Carboni for the Muon Group
• material budget
• cable layout
• status & plans
M1 status – TB 12.07.2007
1
Material budget: what is in the MC
(T. Ruf)
chambers with the Faraday cages and electronics, rest is uniform
M1 status – TB 12.07.2007
2
Ingredients of X0 calculations
Try to be as accurate as possible by including (hopefully)
all importants elements
Cross-check calculations with measurements (weight)
In the final version local disuniformities will be included to
some reasonable level of granularity
Data used
X0
cm
g/cm2
Cu
1.43
12.86
Plastic
30
40
FR4
19.4
33
Al
8.9
24
HV
13.2
LVDS
11.2
ECS
11.2
cables
M1 status – TB 12.07.2007
3
Average values: Services
<t>/X0
Walls
Al 3 mm
0.034
Balconies
Al bars
0.011
Ground Braids (v)
Cu 50 mm2
0.007
Gas pipes (h)
Cu <L> =2 m
0.019
HV/LVDS/ECS cables (v)
<L>=3m
0.028
LV Cables (h)
<L>=2m
0.009
Total
0.108
(h) mostly horizontal
(v) mostly vertical
M1 status – TB 12.07.2007
4
Average values: chambers
03.07.07
M1 Chambers Material Budget
AS - GC
V2.1
<t/X0>
M1R3 M1R4
Cathodes FR4
Cathodes Cu
Bars H
Bars V
V mm3
236880
11844
157500
33300
M1R2
Cathodes FR4
Cathodes Cu
Bars H
Bars V
V mm3
255379.2
6384.48
84900
33300
N
M ch kg
6 2.416176
6 0.105412
4
1.071
4 0.22644
3.82
M ch kg
6 2.604868
6 0.056822
4 0.57732
4 0.22644
3.47
720
720
480
480
t/X0
<t> mm
6.886047
0.344302
3.052326
0.645349
72
72
48
48
<t> mm
0.742381
0.01856
0.164535
0.064535
N
0.035495
0.024077
0.015734
0.003327
0.078632
N
0.003827
0.001298
0.000848
0.000333
0.005125
TOTAL CHAMBERS
0.083757
FC + 0.06
 GEM to be included for the detailed description. Do not play a role
in the average
M1 status – TB 12.07.2007
5
Average values: electronics cards
FC
CARDIAC
FR4
Pins
5 layers CU
Plastic
Average
SPB
FR4
Pins
5 layers CU
Plastic
Average
0.06
V mm3
4832
3.43
90
11700
N
1000
82000
5000
1000
<t> mm
0.19509
0.011356
0.018169
0.472384
0.001006
0.0008
0.0013
0.0016
0.004645
V mm3
4832
3.43
90
8500
N
1000
82000
5000
1000
<t> mm
0.19509
0.011356
0.018169
0.343185
0.001006
0.0008
0.0013
0.0011
0.004214
LV
Burkhard
0.0035
HV
Burkhard
0.0011
Total electronics
M1 status – TB 12.07.2007
0.0134
6
Summary
t/X0
Services
0.108
Chambers (incl. FC)
0.144
Electronics
0.013
Total
0.265
A modest increase w.r.t. the present MC description
M1 status – TB 12.07.2007
7
Cable layout
Original layout unsatisfactory
because of large disuniformities in material
distribution
M1 status – TB 12.07.2007
8
Old Layout M2-M5
A-side
Big X0 jumps
X
C-side
New layout proposed for M1 (Burkhard) to get a more
uniform arrangement of cable material for a better EM Calo
performance.
 But layout different from M2-M5
M1 status – TB 12.07.2007
9
Cable layout
It was decided to stick to the old chamber layout but
to devise new more uniform cabling scheme
Emiliano Danè (last week meeting)
• horizontal cables behind each chamber row
(max 40 cables/row)
• remaining part arranged in vertical chimneys
(two front and two back)
M1 status – TB 12.07.2007
10
Rows with only R4 chambers: rows from 26 to 32 (rows 2->8 mirrored).
b
c
d
a
Sec. a
Sec. b
ECS
 Used 3 clamps;
LV
 12 places each;
HV
 36 places in total;
 For these rows we have:
LVDS
18
gas pipes
cables + 8 pipes = 26 places
M1 status – TB 12.07.2007
11
Rows 22 and 20. (12 and 14)
•68 cables in row 20.
•So 14 cables of chamber 20A3 go to row 22.
•See the Autocad file to better understand.
F
1st wires plane
Row 22
Row 20
a
B
Row 22
C
2nd wires plane
D
E
G
Row 20
M1 status – TB 12.07.2007
12
External chimney
252 cables
Tray B chimney
126 cables
Tray A3 chimney
126 cables
Vertical
routing
M1 status – TB 12.07.2007
13
X0 budget due to cables
A4
A3
A2
A1
D
C
B2
B1
32
0.0225
0.0169
0.0113
0.0113
0.0296 0.0296 0.0056 0.0056
30
0.0225
0.0169
0.0113
0.0113
0.0296 0.0296 0.0056 0.0056
28
0.0225
0.0169
0.0113
0.0113
0.0296 0.0296 0.0056 0.0056
26
0.0225
0.0169
0.0113
0.0113
0.0296 0.0296 0.0056 0.0056
24
0.0438
0.0381
0.0325
0.0325
0.0403 0.0403 0.0163 0.0163
22
0.0438
0.0381
0.0325
0.0325
0.0403 0.0403 0.0163 0.0163
20
0.0425
0.0369
0.0350
0.0775
0.0815 0.0528 0.0288 0.0288
18
0.0350
0.0294
0.0390
0.0603
0.0818 0.0993 0.0463 0.0463
16
0.0350
0.0181
0.0668
0.0718
0.1028 0.1203 0.0463
14
0.0425
0.0369
0.0780
0.1205
0.1525 0.1238 0.0288 0.0288
12
0.0438
0.0381
0.0955
0.0955
0.1033 0.1033 0.0163 0.0163
10
0.0438
0.0381
0.0955
0.0955
0.1033 0.1033 0.0163 0.0163
8
0.0225
0.0169
0.0743
0.0743
0.0926 0.0926 0.0056 0.0056
6
0.0225
0.0169
0.0743
0.0743
0.0926 0.0926 0.0056 0.0056
4
0.0225
0.0169
0.0743
0.0743
0.0926 0.0926 0.0056 0.0056
2
0.0225
0.0169
0.0743
0.0743
0.0926 0.0926 0.0056 0.0056
Average 0.039  0.037=0.028+0.009 of estimate on slide 4
M1 status – TB 12.07.2007
14
gas pipes contributions in detail
M1 Gas Pipes X0
0.032
0.022
0.011
0.043
0.033
0.022
0.046
0.036
0.025
0.043
0.033
0.022
0.032
0.022
0.011
0.000
Average 1.9%
M1 status – TB 12.07.2007
15
Work in progress
• Software (Alessia)
introduce the detailed description in the MC
M1 status – TB 12.07.2007
16
Construction status
M1 status – TB 12.07.2007
17
Since our last meeting (LHCb week):
• the work on M1 beam started 3 weeks ago...
• ...and it stopped due to late (and not announced) delivery of panels
due to a broken machinery at the company
New delivery date July 20 (was June 22)
• a lot of effort done on implementing a - as minimal and uniform as
possible - distribution of cables inside the active area
and on top of this, a lot of engineering work by Alessandro
In the meantime production centers are dressing M1 chambers:
• GEM’s here at CERN by the end of July
• ½ M1R4 here at CERN by early September (then M1R3)
• CERN M1R2 under preparation
M1 status – TB 12.07.2007
18
Design & Drawings
•
All the structural elements have been defined and drawn:
– Walls >>> done
– Carriages >>> done
– Handling System >>> done
– Cable Chains (order >>> done)
•
We have to prepare the executive drawings of the Bottom Rail
•
We are working on the chambers fixation (Balconies)
M1 status – TB 12.07.2007
19
Design: structural elements
•
•
The walls will arrive the Cern at the end of July (20 th).
The carriages will arrive the Cern next week
M1 status – TB 12.07.2007
20
Mechanics
Rearranged
Schedule
Still to define
Manpower
shifts
11-giu-07
18-giu-07
25-giu-07
02-lug-07
09-lug-07
16-lug-07
23-lug-07
30-lug-07
06-ago-07
13-ago-07
20-ago-07
27-ago-07
03-set-07
10-set-07
17-set-07
24-set-07
01-ott-07
08-ott-07
15-ott-07
22-ott-07
29-ott-07
05-nov-07
12-nov-07
19-nov-07
26-nov-07
03-dic-07
10-dic-07
07-gen-08
14-gen-08
21-gen-08
28-gen-08
04-feb-08
11-feb-08
Mechanics
Gas
LV cables
Cables
Cables
Chambers
M1 beam
M1C
M1A
Balconies C
M1C
Brackets
Balconies A
Rails/Chain C
M1A
Rails/Chain A
M1C
M1C
M1A
M1C
M1A
M1A
M1A
21
Effects of new schedule:
• start of LV/Gas cabling not earlier than Sept 15
• start of HV/ECS/Signal cabling not earlier than Oct 15
• start of chamber mounting not earlier than Nov 15
• probably some parallelism on cabling A/C side needed (otherwise
too tight schedule)
• cabling in the big chain still to be understood (and the
interferences with the other operations)
The Muon group is willing to have a complete muon system by
March 2008
M1 status – TB 12.07.2007
22
SPARES
M1 status – TB 12.07.2007
23
effects of the new M1 layout on TRIGGER
In the standard layout, all 5 chambers belonging to a projective tower have the
same ΔZ w.r.t. nominal position (so they have the same size).
With the new layout for M1only, we would have a horizontal row as in the
standard layout (Z = 3 4 3 4 in M1 and in M2-M5) alternate to a row with a
sequence 1-2-1-2 in M2-M5 and 2-1-2-1 in M1
M3
M2
 Towers with Z=1111 in M2-M5
see a “smaller” M1 chamber Z=2
M1
1
3
3
Y
3
IP
1
2
2
2
 Towers with Z=2222 in M2-M5
see a “larger” M1 chamber Z=1
M1 status – TB 12.07.2007
1
1
24
TOP VIEW ROW 18 ACCESS SIDE
B
A3
A2
A1
IP
M1 status – TB 12.07.2007
25