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Frank HartmannIEKP
TEC Meeting July 03
Ring 6 mechanical Qualification
In a nutshell: rel. precision agreement (Aa-Ka): 3-5µm (rot.)abs precision agreement (Aa-Ka): 30-50µm
Problems with the zero-positioning! (circle-ellipse-hole!?! in the graphite)
One example:
Frank HartmannIEKP
TEC Meeting July 03
Circle hole in graphite & bush
Round hole bush
Frank HartmannIEKP
TEC Meeting July 03
Ellipse hole
Another focus!
Frank HartmannIEKP
TEC Meeting July 03
Ring 4 mechanical qualification
• 8 R4 modules from Lyon KA
Already measured! Aachen for crosscheck (Braunschweig yesterday)
• To mention : • 4 sensors are within 10µm vs. rot.
• 2 sensors are +60µm off vs. rot.
• 2 sensors are -60µm off vs. rot.
– ?? 4 sensors/plate 4 in the “middle”, 2 “left”, 2 “right” ??
Frank HartmannIEKP
TEC Meeting July 03 5
pt100 pt100
Module Ring 5 (front-back)
normal
stereo
Frank HartmannIEKP
TEC Meeting July 03
Dummy petal assembly
KA-dummy-petal-coolingTASK-FORCE
Frank HartmannIEKP
TEC Meeting July 03
Ready
Detail: bridge
IR Leds to inject current to simulate irrad. To investigate cooling at final power consumption! (=950 & 1050nm)
IR LedsIR Leds
Frank HartmannIEKP
TEC Meeting July 03
Cooling tests in Stra
Frank HartmannIEKP
TEC Meeting July 03
R7• 2 assembled (1 for KA, 1 for Stra)• Mechanics: good, stiff,
tolerance Si-graphite ~500µm
• 1st run: no problemsAll QTC defects found.leakage current @ 3.6µA (250V)
• 2nd run: 1 NEW PINHOLE leakage current @75µA (250V)
• 3rd run: 1 ADD. PINHOLELeakage current @ 400µA (250V)
Frank HartmannIEKP
TEC Meeting July 03
R7 prototype1 in KA – 1 in Stra
0 100 200 300 400 500 6001E-9
1E-8
1E-7
1E-6
1E-5
1E-4
leakage current on module (far sensor)
Sin
gle
strip
leak
age
curr
ent [
A]
Stripnumber
Known shorts
Known pinhole
3rd run:Shorts, pinholes: bonds removed
1st run
3d run
Add. Pinhole (see Tonys talk)
350µA (one strip)
70µA (one strip)
1st run
Frank HartmannIEKP
TEC Meeting July 03
Strip defectsStrip 19, pinhole pop-up @ run 3Strip current @340µA
Strip 105 new pinhole In 2nd run
QTC pinhole!
QTC short
Frank HartmannIEKP
TEC Meeting July 03
Frank HartmannIEKP
TEC Meeting July 03
R5 irrad hooked to hybridall meas @ -12°C
Cosmic runSome hot channels flagged
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