MODIFICATION
66 -- In-Vacuum Magnetic Measurement System
- Notice Date
- 8/3/2010
- Notice Type
- Modification/Amendment
- NAICS
- 339999
— All Other Miscellaneous Manufacturing
- Contracting Office
- Department of Energy, Brookhaven National Laboratory (DOE Contractor), Brookhaven, PO Box 5000, Bldg. No. 355, Upton, New York, 11973
- ZIP Code
- 11973
- Solicitation Number
- FN165448
- Archive Date
- 8/31/2010
- Point of Contact
- Frank J. Nemeth, Phone: 631-344-4320
- E-Mail Address
-
fnemeth@bnl.gov
(fnemeth@bnl.gov)
- Small Business Set-Aside
- Competitive 8(a)
- Description
- Questions and answers regarding specification from a prospective bidder on 8/3/2010. Answers in Red In sections 3.5, 3.6 and 3.7, is the parameter "Relative Positioning Accuracy" effectively the same as repeatability? Not exactly, because it is still possible to have a repeatability which exceeds the measurement accuracy of a linear encoder due to inherent non-linearity in the encoder scale. Of course when a laser encoder is used the linearity can be exceptional, and the repeatability and relative positioning accuracy could be effectively be the same. In section 3.8 we have two of questions: •i) Can the rotation travel range be +/- 180 degrees, or 0 to 360 degrees, or must it be continuous (i.e. "endless" rotation)? It could be +/- 185 degrees, 0 to 370 degrees, or continuous. What is important is that the range be slightly more than 360 degrees. Endless rotation would twist up the Hall probe cables if it wasn't limited to some reasonable range. •ii) Angular Position Resolution is requested as 0.01 degrees (= 36 arcseconds); however the repeatability is requested as <2 arcsecond - much smaller than the resolution. If the repeatability is to be <2 arcseconds, then the resolution should be equivalent or smaller? If the repeatability and the Angular Position Resolution (.01 degrees) are comparable that will suffice. In section 3.14.15 the first bullet point states that "all vacuum resident IVMMS components shall be bakeable under vacuum to a minimum of 150C for 5 days and preferably capable of surviving 250C for up to 10 hours". It is very likely that some of the in-vacuum components will not be able to comply with the 150C specification (much less the 250C requirement) - such items as motors, encoder read heads, precision guide rails etc., may be limited to 100C-120C bakeout temperatures. Please confirm that this will be acceptable? Yes, if the design approach places the motors and encoders inside the vacuum, then they would need to be bakeable, and it is likely that typical motors and encoders would not be rated for a 150 *C bakeout. Yet, it is to our advantage if we could bake at 150 *C, so if there are components in your particular design approach which cannot achieve that, then clearly list them so that we can evaluate the limitations.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/DOE/BHL/BNL/FN165448/listing.html)
- Place of Performance
- Address: Upton, New York, 11973, United States
- Zip Code: 11973
- Zip Code: 11973
- Record
- SN02227195-W 20100805/100803235658-b07511871900438cd0183a9f86e3b9c9 (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
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