LIGO Document E1300936-x0

DCN- Initial Design of Pcal Alignment ETM and Viewport Targets

Document #:
LIGO-E1300936-x0
Document type:
E - Engineering documents
Abstract:
Initial Design of Pcal Alignment ETM and Viewport Targets. Parts and assembly drawings, and procedure document, for approval.
Files in Document:
None
Authors:
Notes and Changes:
NOTE: RICK SAVAGE AND JEFF LEWIS HAVE SIGNED THIS DCN AS OF 30 JAN 2014. PER CALUM'S APPROVAL, THEY WERE REMOVED FROM THE SIGNATORY LIST SO THAT THE FOLLOWING INFORMATION COULD BE ADDED PRIOR TO CALUM'S SIGNATURE.

D1300777-v1: INITIAL RELEASE

D1300778-
v1: INITIAL RELEASE
v2: ON SHEET 2, ADDED MISSING HOLE TO HOLE DIMENSION: "11.00 ABOUT CENTER LINE"

D1301014-
v1: INITIAL RELEASE
v2:


  • MATERIAL:
    -IS- 6061-T6 AL, ONLY
    -WAS- 6061-T6 AL, 5052-H32 AL OPTIONAL

  • THICKNESS:
    -IS- .125
    -WAS- .10

  • CHANGES MADE TO THE GENERAL FOOTPRINT OF THE PART

  • ADDED 3 HOLE PATTERN AT TWO PLACES, SEE DETAIL "A"

  • WEIGHT:
    -IS- .75 LB
    -WAS- .77 LB

D1301015-
v1: INITIAL RELEASE
v2:


  • FABRICATION:
    -WAS- BENT SHEET METAL OPTION
    -IS- NO BENDING OPTION

  • MATERIAL CHANGE:
    -FROM- 5052-H32 AL, WITH 6061-T6 AL OPTION
    -TO- 6061-T6 AL, NO OPTION

  • 8-32 UNC TAPPED HOLES REPLACED WITH EMBOSSED 8-32 STI TAPPED HOLES.

D1301016-v1: INITIAL RELEASE

D1301022-
v1: INITIAL RELEASE
v2: Scallop features added to O.D. of part for lightening.

E1300939-
v1: INITIAL RELEASE
v2: IMPROVEMENTS AND CLARIFICATIONS MADE ACCORDING TO SUGGESTIONS FROM FIRST DRAFT (REV v1) REVIEWS.
v3:


  • Step 1: "At time of mounting Target Assembly to the quad frame, the ETM may have First Contact on its reflective surface. No other reflective surface protection should be on the ETM. The two 1 mirrors (see figure 3) are to be included on the Target Assembly only if First Contact is present and left fully intact on the ETM reflective surface.", inserted before the Step 1 of previous revision.

  • Step 4: "If First Contact is not present and left intact on the ETM reflective surface, the Target Assembly attachment is now complete. Otherwise go to next section.", appended to end of previous (-v2) text.

  • Step 5: "With assistance from IAS, shim the Alignment Target as necessary to achieve 141 μrad maximum IFO Beam Axis parallelism errors in both pitch and yaw, for both 1 mirrors.", added to the end of the document.


DCC Version 3.4.0, contact Document Database Administrators