mechanical/thermal measurements t. bowcock, j. carroll
TRANSCRIPT
![Page 1: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/1.jpg)
Mechanical/Thermal Measurements
T. Bowcock, J. Carroll
![Page 2: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/2.jpg)
Production Facility
• Have been waiting for release of clean-rooms
• Full release of space next week– Had to move in before handover(!)
![Page 3: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/3.jpg)
Production Facilities
LHCb
R&D
![Page 4: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/4.jpg)
![Page 5: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/5.jpg)
![Page 6: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/6.jpg)
Thermal Measurements
![Page 7: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/7.jpg)
![Page 8: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/8.jpg)
![Page 9: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/9.jpg)
Measuring Temperature
• Use IR camera– Note measurements in vacuo through window
introduce an offset (!)– Extra thermal sensors for recalibration– Linearity
• Is it maintained?
• Seems to be to about 1C over range –20 to +20.
![Page 10: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/10.jpg)
![Page 11: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/11.jpg)
11C (spot)
Ansys Al model(10C)Tochnog
Calibration ModelCalibration Model
![Page 12: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/12.jpg)
0
10
20
30
40
50
60
70
0 5 10 15 20 25
Power
Delta(T)(from nominal)
Calibration ModelCalibration Model
![Page 13: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/13.jpg)
Chipglue
kaptonsensor
ceramic
TPG
Chipglue
kaptonsensor
TPG
CF weave
CF(UD)
![Page 14: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/14.jpg)
Material Radiation Thickness CTE Conductivitylength(cm) (microns) (x10**6) WmK
Sensor silicon 9.3 300 2.8 130
Hybridbaseline composite kapton 32.5 100 4 50
CF(UD) 24.9 95 <1 800
TPG 24.9 300 <1 1700
CF(weave) 24.9 150 <1 10
Hybridbackup composite beryllia 14.4 300 8.3 280
TPG 24 300 <1 1700
Thermal connector
baseline aluminium 13 300 23 202
backup titanium 3.6 300 8.6 157
Paddle CF2 24.9 200 <1 10(10)Paddle base aluminium 8.9 O(3cm) 23 202
Spring steel 1.8 O(3cm) 12 669location base steel 1.8 O(3cm) 12 669
![Page 15: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/15.jpg)
![Page 16: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/16.jpg)
![Page 17: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/17.jpg)
Beryllia Hybrid/TPG Tcool Heat(Chips) Heat Si Max(si) Min(Si) Max(Chips)(backup) -25 10W 0.3W -18.3 -20 -11.7
-25 20W 0.3W -14.2 -16 1.5
-25 24W 0.3W -12.5 -14.4 6.8
-25 36W 0.3W -7.5 -9.6 2.7
Aluminium Nitride/TPG Tcool
-25 10W 0.3W -18 -19.7 -11.2
-25 20W 0.3W -13.5 -15.4 2.6
-25 24W 0.3W -12.5 -13.7 8.5
-25 36W 0.3W -7.5 -8.2 24.5
Carbon Fibre Composite -25 10W 0.3W -15 -17.4 -10.8300 micron TPG(baseline) -25 20W 0.3W -7.3 -9.9 3.3
-25 24W 0.3W -4.2 -7 8.9
-25 36W 0.3W 5 1.8 25.7
![Page 18: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/18.jpg)
Improvements
• Holes in kapton– a la ATLAS
• Non uniform thickness– Frame engineered in CF can reduce operating
temperature by several degrees– Minimize(reduces) the amount of material
![Page 19: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/19.jpg)
Mechanical Hybrid• 2nd prototype CF manufactured
– Photo available if necessary– Bows <50 microns across 10cm– Precision slots manufactured in CF using spark erosion
• But slow and expensive
• 3rd CF prototype– Reduce the bow < 25 microns– Insert the TPG
• Aliminium Nitride Substrates exist (correct size and thickness).– Laser cutting– Bonding to TPG
![Page 20: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/20.jpg)
![Page 21: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/21.jpg)
![Page 22: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/22.jpg)
Electronics
Cooling Bracket & Fixings
Carbon Fiber Paddle
Micrometer Adjusters
Paddle Base
Flat Spring
Location Base
Substrates
Silicon Detectors
x
y y
z
z
x (pitch)
(roll)
(slew)
![Page 23: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/23.jpg)
![Page 24: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/24.jpg)
Pre-alignment Jig
• Two hybrids relative to each other
• Jig being designed…– Relatively simple device
![Page 25: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/25.jpg)
![Page 26: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/26.jpg)
Adjustments- Translations
• X– 6 microns/5 degrees
• Y– 7 microns/5 degrees
• Z– 2 microns/5 degrees (*)
![Page 27: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/27.jpg)
Rotations
• Slew– 0.88 degree for full scale(see Y drive)
• Roll– 0.25 degree for 360 degree adjustments(8
microns drive/5 degree adjustments)
• Pitch– 0.26 degree for 540 degrees adjustment(10
microns approx in y/5 degree)
![Page 28: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/28.jpg)
Thermal Measurements
• Preliminary look at the alignment mechanism– Increase temperature of base by +10 degrees
relative to platform– X,Z movement small but large pitch
• O(100)micron
![Page 29: Mechanical/Thermal Measurements T. Bowcock, J. Carroll](https://reader035.vdocuments.us/reader035/viewer/2022062318/55160200550346cf6f8b5bc9/html5/thumbnails/29.jpg)
Conclusions
• Thermal module– Real prototype being built– All components– Calibration model consistent with measurement
• Mechanical Alignement– 2nd prototype mechanism behaves much as expected– Need to understand problem thermal movement
• Module modifications– Cabling (cf. N.A. Smith next week!)