Specification 11 is hereby revised as follows:

FROM:
11. Must include a cryogenic and vacuum compatible XYZ nanopositioning stage mounted to cryostat cold plate. The stage must have at least 3mm of travel in each direction with 10 nm scale resolution at cryogenic temperatures. The positioners must supply at least 25 g of force in each direction. All wiring inside the cryostat, electrical feedthrough connections, and air-side cabling must be provided. An electronic controller capable of controlling all three axes must be provided. The stage controller must be computer controllable. The footprint of the stage must take up less than one half of the cryostat cold plate area.

TO:
11. Must include a cryogenic and vacuum compatible XYZ nanopositioning stage mounted to cryostat cold plate. In two directions (X and Y) the stage must have at least 3mm of travel in each direction with 50 nm scale resolution at cryogenic temperatures and supply at least 25 g of force. In the third direction (Z) the stage must have at least 2.5mm of travel with 50 nm scale resolution at cryogenic temperatures and supply at least 25 g of force. All wiring inside the cryostat, electrical feedthrough connections, and air-side cabling must be provided. An electronic controller capable of controlling all three axes must be provided. The stage controller must be computer controllable. The footprint of the stage must take up less than one half of the cryostat cold plate.

The due date for quotes has been extended as follows:
FROM: July 14, 2015 at 12 pm ET
TO: July 22, 2015 at 12 pm ET

All other terms and conditions and minimum required specifications remain unchanged.