Annular End Reaction Mass (AERM)

Document #:

LIGO-D1500163-v3

Document type:

D - Drawings

Abstract:

Redesigned End Reaction Mass (ERM) with Dia. 200 mm hole in center

Files in Document:

• D1500163-v3.PDF (362.0 kB)

ICS/JIRA Record:

• ICS_LINK

Topics:

• System Engineering
• Basic R&D

Authors:

• Eduardo Sanchez
• GariLynn Billingsley

Notes and Changes:

Revised as follows:

NOTE NO. 3 WAS:
INSPECTION POLISH ALL FACES, EDGES AND CHAMFER.
SURFACES SHALL APPEAR TRANSPARENT WITH NO GREY, SCUFFS OR
SCRATCHES VISIBLE TO THE NAKED EYE WHEN VIEWED IN NORMAL
ROOM LIGHT AGAINST A BLACK BLACKGROUND.

NOTE NO. 4 WAS:
ETCH, GRIND OR SANDBLAST THE SERIAL NUMBER "ERM X", APPROX.
WHERE SHOWN, LETTERING APPROX. 4mm HIGH, WHERE "XX" IS
INCREMENTAL STARTING WITH "11".

ADDED NEW NOTES NO. 6-8

F/D:

ZONE D/4: Change chamfer tolerance, WAS 2.0 ± 0.2 x 39deg ±5. Also changed (39deg) call-out to ( 41 deg).

Zone F/5: Center void diameter WAS: 200 DIA. IS: 222.5 ± 0.25 mm with similar Cyl. & Perp. as OD (340mm)

Related Documents:

• LIGO-E0900138: End Reaction Mass Electro Static Drive gold coating specification
• LIGO-D0900949: End Reaction Mass ESD Coating Face Pattern
• LIGO-D0900958: GOLD COATING PATTERN END REACTION MASS BARREL

Referenced by: