pax detector
DESCRIPTION
PAX DETECTOR. SUMMARY DETECTOR LAYOUT COOLING SYSTEM SUPPORT READ-OUT FEED THROUGH OVERALL DIMENSIONS. DETECTOR LAYOUT. OVERALL VIEW. QUADRANT. TARGET CELL. SUPPORT. COOLING. FEED-THROUGH. QUADRANT. READ-OUT ELECTRONICS. DETECTOR COOLING BOX INCLUDING 3 LAYERS. - PowerPoint PPT PresentationTRANSCRIPT
PAX DETECTOR
Tbilisi , 10/07/2014 V. Carassiti , P. Lenisa
1
V. Carassiti , P. Lenisa 2Tbilisi , 10/07/2014
SUMMARY
DETECTOR LAYOUT
COOLING SYSTEM
SUPPORT
READ-OUT FEED THROUGH
OVERALL DIMENSIONS
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DETECTOR LAYOUT
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OVERALL VIEW
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COOLING
FEED-THROUGH
QUADRANT
SUPPORTTARGET CELL
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READ-OUT ELECTRONICS
DETECTORCOOLING BOX INCLUDING3 LAYERS
QUADRANT
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SENSORS LAYER 1 : HERMES
SENSORS LAYER 3 : PAX
SENSORS LAYER 2 : PAX
READ-OUT LAYER 3
READ-OUT LAYER 2
READ-OUT LAYER 1
READ-OUT CONCEPT
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UPSTREAM
DOWNSTREAM
UPSTREAM/DOWNSTREAM VIEWS
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LEFT
RIGHT
LEFT/RIGHT VIEWS
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READ-OUT PCB
HERMES SENSOR
LAYER 1 + READ-OUT
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READ-OUT PCB
PAX SENSOR
LAYER 2 + READ-OUT
V. Carassiti , P. Lenisa 11Tbilisi , 10/07/2014
READ-OUT PCB
PAX SENSOR
LAYER 3 + READ-OUT
V. Carassiti , P. Lenisa 12Tbilisi , 10/07/2014
COOLING SYSTEM DESIGN
SENSORS COOLING SYSTEM
READ-OUT COOLING SYSTEM
FLOW RATE UNIFORMITY
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NOMINAL TUBE SIZE : ¼ in
FLEXIBLE TUBE : ¼ inCode : 321-4x2
THE COLD PLATE
COLD PLATE DIMENSIONS: 125 x 252,5 x 8 mm^3
TUBE AND PLATE WELDED BY DIFFUSION: PROCESS UNDER VACUUM (10E-4 Bar) ; PRESSURE BETWEEN THE PARTS : 0,4-1,6 Bar ; WELDING TEMPERATURE : 50-70% OF THE MATERIAL MELTING POINT
MANUFACTURER:THERMACORE EUROPE Ltd.ASHINGTON (UK)
V. Carassiti , P. Lenisa 14Tbilisi , 10/07/2014
Box Aluminum Surface = Bas = 0,337 m^2Box Silicon Surface = Bss = 0,033 m^2
Box Temperature = Tb = -10 °CRoom Temperature = Tr = 30 °C
COOLING POWER = Pc = 5,672E-8 x [Ae x Bas + Se x Bss] x (Tr^4 – Tb^4) = 12,5 W
Aluminum emissivity = Ae = 0,09Silicon emissivity = Se = 0,9
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PDESIGN = 15 W
BOX COOLING POWER CALCULATION
ABSORBED RADIATION FROM ISOLATED BOX IN ROOM TEMPERATURE ENVIRONMENT
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25 50 75 100 125 150 175 200 225 250 275 300-120
-100
-80
-60
-40
-20
0
Tfluid
Tdelivery
α (W/m^2C°)
T (C
°)
COOLING FLUID PROPERTIES (SENSORS BOX)
Tbilisi , 10/07/2014
COOLING FLUID : ETHANOL ALCOHOOL °C W/m^2C°
Boiling point 78,5
Freezing point -114
Convection coefficient α 250
Delivery temperature Td -19
Wall temperature Tw -10
Fluid temperature Tf = (Td + Tw)/2 -14
ETHANOL PROPERTIES @ Tf and atmospheric pressure
Density (Kg/m^3) ρ 818
Specific heat (J/KgK) Cp 2287
Thermal conductivity (W/mK) λ 0,13
Kinematic viscosity (m^2/s) ν 2,69E-06
Kinematic viscosity @ Tw (m^2/s) νw 2,54E-06
COOLING FLUID TEMPERATURE VS CONVECTION COEFFICIENT
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Tube diameter = D = 4,55 × 10−3 (m)
Wall temperature = TW = −10 (°C)
Circuit length = CL = 0,95 (m)
Fluid temperature = TF = TW −PC
α × π × D × CL
= −10 −15
α × π × 4,55 × 10−3 × 0,95= −10 −
1105
α (C°)
Delivery fluid temperature = TD = 2 × TF − TW = 2 × (−10 −−1105
α) +10 (C°)
COOLING FLUID & CONVECTION COEFFICIENT SELECTION
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25 50 75 100 125 150 175 200 225 250 275 300
-120.00
-100.00
-80.00
-60.00
-40.00
-20.00
0.00
20.00
40.00
60.00
flow rate (Kg/h)
Tfluif (°C)
Tdelivery (°C)
flow resistance (Pa/100)
α (W/m^2C°
T (°C
)
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FLOW SPEED, FLOW RATE AND FLOW RESISTANCE
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Nu =α × d
λ=
250 × 0,0045
0,13= 8,75
Pr =Cp × ρ × υ
λ=
2287 × 818 × 2,69 × 10−6
0,13= 38,7
CL
D=
0,95
0,0045= 209
Re =Nu
1,86 × Pr ×D
CL
⎛
⎝ ⎜
⎞
⎠ ⎟
0,33
×υ
υw
⎛
⎝ ⎜
⎞
⎠ ⎟0,14
⎡
⎣
⎢ ⎢ ⎢ ⎢ ⎢
⎤
⎦
⎥ ⎥ ⎥ ⎥ ⎥
3
= 539
Vf =Re × υ
d= 3,19 × 10−1 m/s = 19,1 m/min flow speed
F = Vf ×π × d2
4× 3600 = 1,9 × 10−2 m3/h = 15,3 Kg/h flow rate
ΔT =PC × 3600
F × CP
=15 × 3600
15,3 × 2287= 1,5 °C in - out temperature difference
ξ =64
Re= 0,12 friction factor
Leq = CL + (6 × 30 × D) = 1,77 m equivalent linear length of the circuit
Δp = ξ ×Leq
D×ρ × Vf 2
2= 1917 Pa flow resistance
COOLING FLUID OPERATING CONDITIONS (SENSORS BOX)
α=250 W/m^2K
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PDESIGN = 10 W
READ-OUT PCBs COOLING
Single PCB power = 1,25 W
PCB number/cooling plate = 4
Total power = 4 x 2 x 1,25 = 10 W
PCB Temperature = Tb = 30 °C
Room Temperature = Tr = 30 °C
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25 50 75 100 125 150 175 200 225 250 275 3000
5
10
15
20
25
30
35
TfluidTdelivery
α (W/m^2C°)
T (C
°)
COOLING FLUID PROPERTIES (READ-OUT PCB)
Tbilisi , 10/07/2014
COOLING FLUID : ETHANOL ALCOHOOL °C W/m^2C°
Boiling point 78,5
Freezing point -114
Convection coefficient α 150
Delivery temperature Td 25
Wall temperature Tw 30
Fluid temperature Tf = (Td + Tw)/2 28
ETHANOL PROPERTIES @ Tf and atmospheric pressure
Density (Kg/m^3) ρ 782
Specific heat (J/KgK) Cp 2476
Thermal conductivity (W/mK) λ 0,14
Kinematic viscosity (m^2/s) ν 1,25E-06
Kinematic viscosity @ Tw (m^2/s) νw 1,18E-06
COOLING FLUID TEMPERATURE VS CONVECTION COEFFICIENT
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Tube diameter = D = 4,55 × 10−3 (m)
Wall temperature = TW = 30 (°C)
Circuit length = CL = 1,9 (m)
Fluid temperature = TF = TW −PC
α × π × D × CL
= 30 −10
α × π × 4,55 × 10−3 × 1,9= 30 −
368
α (C°)
Delivery fluid temperature = TD = 2 × TF − TW = 2 × (30 −368
α) − 30 (C°)
COOLING FLUID & CONVECTION COEFFICIENT SELECTION
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25 50 75 100 125 150 175 200 225 250 275 3000.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
flow rate (Kg/h)
Tfluif (°C)
Tdelivery (°C)
flow resistance (Pa/100)
α (W/m^2C°
T (°C
)
Tbilisi , 10/07/2014
FLOW SPEED, FLOW RATE AND FLOW RESISTANCE
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Nu =α × d
λ=
150 × 0,0045
0,13= 4,9
Pr =Cp × ρ × υ
λ=
2476 × 782 × 1,25 × 10−6
0,14= 17,3
CL
D=
2,1
0,0045= 462
Re =Nu
1,86 × Pr ×D
CL
⎛
⎝ ⎜
⎞
⎠ ⎟
0,33
×υ
υw
⎛
⎝ ⎜
⎞
⎠ ⎟0,14
⎡
⎣
⎢ ⎢ ⎢ ⎢ ⎢
⎤
⎦
⎥ ⎥ ⎥ ⎥ ⎥
3
= 454
Vf =Re × υ
d= 1,25 × 10−1 m/s = 7,5 m/min flow speed
F = Vf ×π × d2
4× 3600 = 7,3 × 10−3 m3/h = 5,7 Kg/h flow rate
ΔT =PC × 3600
F × CP
=10 × 3600
5,7 × 2476= 2,5 °C in - out temperature difference
ξ =64
Re= 0,14 friction factor
Leq = CL + (14 × 30 × D) = 4 m equivalent linear length of the circuit
Δp = ξ ×Leq
D×ρ × Vf 2
2= 756 Pa flow resistance
COOLING FLUID OPERATING CONDITIONS (READ-OUT PCB)
α=150 W/m^2K
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DETECTOR/PCBs COOLING SUMMARY TABLE ( Troom = 30 °C )
DETECTOR (1/4) PCBs (1/4)
TEMPERATURE (°C) -10 30
POWER (W) 15 10
FLOW RATE (Kg/h) 15,3 5,7
FLOW RESISTANCE (Pa) 1917 756
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TOTAL POWER = 15 × 4 = 60 W
DETECTOR COOLING SYSTEM (SENSORS BOX)
COLD PLATE
SUPPLYING-COLLECTING RINGS
OUTPUT
INPUT
MANUFACTURER:NORDIVAL Srl SWAGELOCK ITALIAROVATO (ITALY)
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DETECTOR COOLING SYSTEM – HYDRAULIC CIRCUIT SCHEME
FrD1
Fr = box cooling flow rate = 18,7 (l/h)
FrD4
FrD3
FrD2
4Fr = QinLi1
2FrLi2
FrLi3
FrLo3Fr
Fr 2Fr
2Fr
2FrLo2
4Fr = QoutLo1
Collecting ring
Supplying ring
Box circuit
L = length of the branches (m)
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DETECTOR COOLING SYSTEM - FLOW RATE UNIFORMITY BETWEEN THE PLATES
CALCULATION PROCESS
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Q = flow rate (m3/s)
L = branch length (m)
d = tube inner diameter (m)
A = π × d2
4= tube cross section (m2)
c =Q
A= flow velocity (m/s)
Re =ρ × c × d
μ= Reynolds number
λ =64
Re (Re ≤ 2300) λ = 0,316 × Re−0,25 (Re > 2300) Friction factor
ΔPL = λ ×L
d
⎛
⎝ ⎜
⎞
⎠ ⎟×ρ × c 2
2
⎛
⎝ ⎜
⎞
⎠ ⎟= linear flow resistance (Pa)
ΔPC =K ×ρ × c 2
2
⎛
⎝ ⎜
⎞
⎠ ⎟= local flow resistance (Pa)
ΔPT = ΔPL + ΔPC = total flow resistance (Pa)
QD2
QD1
=ΔPT2
ΔPT1
⎛
⎝ ⎜
⎞
⎠ ⎟
0,5
= flow rate ratio between the cooling plates
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DETECTOR COOLING SYSTEM - FLOW RATE UNIFORMITY BETWEEN THE PLATES
CALCULATION PROCESS
Branch Lo1 Lo2 Lo3 D1 Li3 Li2 Li1
Q (m^3/s) 2,07E-05 1,04E-05 0,52E-05 0,52E-05 0,52E-05 1,04E-05
2,07E-05
L (m) 0,523 0,344 0,642 2,442 0,642 0,344 0,523
d (m) 4,55E-03 7,73E-03 7,73E-03 4,55E-03 7,73E-03 7,73E-03
4,55E-03
A (m^2) 1,63E-05 4,7E-05 4,7E-05 1,62E-05 4,7E-05 4,7E-05 1,63E-05
c (m/s) 1,27 0,22 0,11 0,32 0,11 0,22 1,27
Re 2154 637 319 541 319 637 2154
λ 0,03 0,1 0,2 0,12 0,2 0,1 0,03
ΔPT (Pa) 2598 100 86 2679 86 100 2598
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input pressure @ cooling plate D1 :
ΔPT1 = ΔPLo1 + ΔPLo2 + ΔPLo3 + ΔPD1 = 5463 (Pa)
input pressure @ cooling plate D2 :
ΔPT 2 = ΔPLo1 + ΔPLo2 + ΔPLo3 + ΔPD1 + ΔPLi3 = 5549 (Pa)
QD2
QD1
=ΔPT2
ΔPT1
⎛
⎝ ⎜
⎞
⎠ ⎟
0,5
= 1,008 flow rate ratio between the cooling plates
TOTAL FLOW RATE = 75 l/h
TOTAL PUMPING PRESSURE = 8250 Pa
FLOW RATE UNIFORMITY WITHIN 1%
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TOTAL POWER = 10 × 4 = 40 W
PCBs COOLING SYSTEM
COLD PLATES
SUPPLYING-COLLECTING RINGS
OUTPUT
INPUT
V. Carassiti , P. Lenisa 26Tbilisi , 10/07/2014
PCBs COOLING SYSTEM - FLOW RATE UNIFORMITY BETWEEN THE PLATESCALCULATION PROCESS
Branch Lo1 Lo2 Lo3 D1 Li3 Li2 Li1
Q (m^3/s) 8E-06 4E-06 2E-06 2E-06 2E-06 4E-06 8E-06
L (m) 0,523 0,365 0,730 5,344 0,730 0,365 0,523
d (m) 4,55E-03 7,73E-03 7,73E-03 4,55E-03 7,73E-03 7,73E-03
4,55E-03
A (m^2) 1,63E-05 4,7E-05 4,7E-05 1,62E-05 4,7E-05 4,7E-05 1,63E-05
c (m/s) 0,5 0,1 0,05 0,12 0,05 0,1 0,5
Re 1792 527 264 448 264 527 1792
λ 0,04 0,12 0,24 0,14 0,24 0,12 0,04
ΔPT (Pa) 436 18 17 1000 17 18 436
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input pressure @ cooling plate D1 :
ΔPT1 = ΔPLo1 + ΔPLo2 + ΔPLo3 + ΔPD1 =1471 (Pa)
input pressure @ cooling plate D2 :
ΔPT 2 = ΔPLo1 + ΔPLo2 + ΔPLo3 + ΔPD1 + ΔPLi3 =1488 (Pa)
QD2
QD1
=ΔPT2
ΔPT1
⎛
⎝ ⎜
⎞
⎠ ⎟
0,5
= 1,005 flow rate ratio between the cooling plates
TOTAL FLOW RATE = 30 l/h
TOTAL PUMPING PRESSURE = 1942 Pa
FLOW RATE UNIFORMITY WITHIN 1%
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DETECTOR SUPPORT
SUPPORT GEOMETRY
CONSTRAINTS & STRUCTURAL COMPARISON
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DETECTOR SUPPORT
QUADRANT SEATS
QUADRANT ASSEMBLING SCREWS
CS1
CS3
CS2SUPPORT CROSS SECTIONS :CS1 = 80 x 20 mm^2CS2 = CS4 = 40 x 20 mm^2CS3 = 33 x 20 mm^2CS5 = 20 X 20 mm^2
CS5
CS4
CHAMBER MOUNTING WALL
CHAMBER WALL
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DETECTOR SUPPORT
QUADRANT SEAT
QUADRANT ASSEMBLED
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DETECTOR SUPPORT – STATIC SCHEME
FIXED END
BEARINGP1P4
P2
P3
R2
R1
APPLIED LOADS :P1 = P4 = 104 NP2 = P3 = 92 NTHE TOTAL LOADAPPLIED TO ONLYONE SUPPORT
LOADS :P support = 40 NP detector quadrant = 72 NP cooling system = 22 NP target cell = 42 NP target cell support = 3 N
R1 , R2 = REACTIONS
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DETECTOR SUPPORT STRUCTURAL COMPARISON
FIXED END P4
CS2P2+P3CS3
P1
L3
L2
L1
APPLIED LOADS :P1 = P4 = 104 NP2 + P3 = 184 N
LENGTHS:L1 = 143 mmL2 = 250 mmL3 = 357 mm
FIXED END
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MP1 = P1 × L3 = 37,1 Nm (bending moment load P1)
MP 2+P 3 = P2 + P3( ) × L2 = 46 Nm (bending moment load P2 +P3)
MP 4 = P4 × L1 =14,9 Nm (bending moment load P4)
MCS1 = MP1 +MP 2+P 3 +MP 4 = 98 Nm (bending moment @ cross section CS1)
MCS2 = P1× L3 − L1( ) + P2 + P3( ) × L2 − L1( ) = 41,9 Nm (bending moment @ cross section CS2
MCS3 = P1× L3 − L2( ) =11,1 Nm (bending moment @ cross section CS3)
TCS1 =MCS1 −MCS2
L1= 392 N (shearing load @ cross section CS1)
TCS2 =MCS2 −MCS3
L2 − L1= 288 N (shearing load @ cross section CS2)
TCS3 =MCS3
L3 − L2=104 N (shearing load @ cross section CS3)
Cross section CS1
JCS1 =20 × 803
12= 853333 mm4 (moment of inertia) ; ACS1 = 20 × 80 =1600 mm2 (area)
WCS1 =JCS180 2
= 21333 mm3 (flexural stiffness)
σCS1 =MCS1
WCS1
= 4,6 MPa ; τ CS1 =3 × TCS12 × ACS1
= 0,4 MPa ; σ EQ = σCS12 + 3 × τ CS1
2 = 4,7 MPa < σ AMM
Cross section CS2
JCS2 = 2 ×20 × 403
12= 213333 mm4 ; ACS2 = 2 × 20 × 40 =1600 mm2 ; WCS2 =
JCS2
40 2=10667 mm3
σCS2 =MCS2
WCS2
= 3,9 MPa ; τ CS2 =3 × TCS2
2 × ACS2
= 0,3 MPa ; σ EQ = σCS22 + 3 × τ CS2
2 = 3,9 MPa < σ AMM
Cross section CS3
JCS3 = 2 ×20 × 333
12
⎛
⎝ ⎜
⎞
⎠ ⎟+ ACS3 ×1072
( ) ⎡
⎣ ⎢
⎤
⎦ ⎥= 30345150 mm4 ; ACS3 = 2 × 20 × 33 =1320 mm2
WCS3 =JCS3
107= 283600 mm3
σCS3 =MCS3
WCS3
= 0,04 MPa ; τ CS3 =3 × TCS3
2 × ACS3
= 0,08 MPa ; σ EQ = σCS32 + 3 × τ CS3
2 = 0,15 MPa < σ AMM
CS1
MATERIAL : ALUMINUM 6061σR=290 MPaσS=240 MpaσAMM=240/1,6= 150 MPa
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DETECTOR SUPPORT STRUCTURAL COMPARISON
FIXED END P4
CS2P2+P3CS3
P1CS4
L3
L2
L1
APPLIED LOADS :P1 = P4 = 104 NP2 + P3 = 184 N
LENGTHS:L1 = 143 mmL2 = 250 mmL3 = 357 mmL4 = 415 mm
FIXED END + BEARING
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MP1 = P1 ×L4 − L3( ) × L32
2 × L43
⎡
⎣ ⎢
⎤
⎦ ⎥× L4 − L3 − 2 × L4( ) = 4,15 Nm (bending moment load P1 @ CS4)
MP1−CS1 = P1×L4 − L3( ) × L3
2 × L42
⎡
⎣ ⎢
⎤
⎦ ⎥× L4 − L3 − L4( ) = 2,23 Nm ( bending moment load P1 @ CS1)
MP 2+P 3 = P2 + P3( ) ×L4 − L2( ) × L22
2 × L43
⎡
⎣ ⎢
⎤
⎦ ⎥× L4 − L2 − 2 × L4( ) = 8,83 Nm (bending moment load P2+P3 @ CS3)
MP 2+P 3−CS1 = P2 + P3( ) ×L4 − L2( ) × L2
2 × L42
⎡
⎣ ⎢
⎤
⎦ ⎥× L4 − L2 − L4( ) = 5,51 Nm (bending moment load P2 +P3 @ CS1)
MP 4 −CS2 = P4 ×L4 − L1( ) × L12
2 × L43
⎡
⎣ ⎢
⎤
⎦ ⎥× L4 − L1− 2 × L4( ) = 2,26 Nm (bending moment load P4 @ CS2)
MP 4 −CS1 = P4 ×L4 − L1( ) × L1
2 × L42
⎡
⎣ ⎢
⎤
⎦ ⎥× L4 − L1− L4( ) =1,68 Nm (bending moment load P4 @ CS1)
TP1−CS5 = P1 ×L32
2 × L43
⎛
⎝ ⎜
⎞
⎠ ⎟× L4 − L3 − 2 × L4( ) = 71,58 N (shearing load @ cross section CS5)
TP1−CS1 = P1 −TP1−CS5 = 32,42 N (shearing load @ cross section CS1)
TP 2+P 3−CS5 = P2 + P3( ) ×L22
2 × L43
⎛
⎝ ⎜
⎞
⎠ ⎟× L4 − L2 − 2 × L4( ) = 53,5 N (shearing load @ cross section CS5)
TP 2+P 3−CS1 = P2 + P3 −TP 2+P 3−CS5 =130,5 N (shearing load @ cross section CS1)
TP 4 −CS5 = P4 ×L12
2 × L43
⎛
⎝ ⎜
⎞
⎠ ⎟× (L4 − L1− 2 × L4) = 8,30 N (shearing load @ cross section CS5)
TP 4 −CS1 = P4 −TP 4 −CS5 = 95,7 N (shearing load @ cross section CS1)
MCS1 = MP1−CS1 +MP 2+P 3−CS1 +MP 4 −CS1 = 9,42 Nm (total bending moment @ CS1)
MCS3 =12,49 Nm (maximum bending moment along the beam @ CS3)
TCS1 = TP1−CS1 +TP 2+P 3−CS1 +TP 4 −CS1 = 258,62 N (total shearing load @ CS1)
TCS5 = TP1−CS5 +TP 2+P 3−CS5 +TP 4 _CS5 =133,38 N (total shearing load @ CS5)
CS1
MATERIAL : ALUMINUM 6061σR=290 MPaσS=240 MpaσAMM=240/1,6= 150 MPa
BEARINGCS5
L4
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DETECTOR SUPPORT STRUCTURAL COMPARISON
FIXED END FIXED END + BEARING
MCS1 (Nm) 98 (max) 9,4
MCS3 (Nm) 11,1 12,5 (max)
TCS1 (N) 392 258,6
TCS5 (N) - 133,4
98 Nm
392 N
9,4 Nm
258,6 N 133,4 N
VACUUMCHAMBER
12,5 Nm11,1 Nm
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READ-OUT FEED THROUGH
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THE READ-OUT FEEDTHROUGH
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50 PINS CONNECTOR
DNCF100 FLANGE
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THE READ-OUT FEEDTHROUGH
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DETECTOR OVERALL DIMENSIONS
ALLOWED ASSEMBLING SPACE
SKETCHES
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DETECTOR EXTRACTING/INSERTING ALLOWED SPACE
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7
mm
INSERTION/EXTRACTION168
mm
INSERTION WINDOW = 397 mm ; DETECTOR SIZE = 390 mm
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SCKETCH - 1
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SCKETCH - 2
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SCKETCH - 3
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SCKETCH - 4
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SCKETCH - 5
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SCKETCH - 6
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SCKETCH - 7
Tbilisi , 10/07/2014
V. Carassiti , P. Lenisa 46
THANK YOU !!
Tbilisi , 10/07/2014