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Ring 6 mechanical Qualification

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:. Circle hole in graphite & bush. Round hole.

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Ring 6 mechanical Qualification

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  1. 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: TEC Meeting July 03

  2. Circle hole in graphite & bush Round hole bush TEC Meeting July 03

  3. Ellipse hole Another focus! TEC Meeting July 03

  4. 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” ?? TEC Meeting July 03

  5. pt100 pt100 Module Ring 5 (front-back) stereo normal TEC Meeting July 03

  6. Dummy petal assembly KA-dummy-petal-cooling TASK-FORCE  TEC Meeting July 03

  7. Ready IR Leds IR Leds Detail: bridge IR Leds to inject current to simulate irrad. To investigate cooling at final power consumption! (l=950 & 1050nm) TEC Meeting July 03

  8. Cooling tests in Stra TEC Meeting July 03

  9. R7 • 2 assembled (1 for KA, 1 for Stra) • Mechanics: good, stiff, tolerance Si-graphite ~500µm • 1st run: no problems • All QTC defects found. • leakage current @ 3.6µA (250V) • 2nd run: 1 NEW PINHOLE • leakage current @75µA (250V) • 3rd run: 1 ADD. PINHOLE • Leakage current @ 400µA (250V) TEC Meeting July 03

  10. R7 prototype1 in KA – 1 in Stra 1st run Known shorts Known pinhole 3rd run: Shorts, pinholes: bonds removed 1st run Add. Pinhole (see Tonys talk) 350µA (one strip) 70µA (one strip) 3d run TEC Meeting July 03

  11. Strip defects Strip 19, pinhole pop-up @ run 3 Strip current @340µA QTC short Strip 105 new pinhole In 2nd run QTC pinhole! TEC Meeting July 03

  12. TEC Meeting July 03

  13. R5 irrad hooked to hybridall meas @ -12°C Cosmic run Some hot channels flagged TEC Meeting July 03

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