Cryogen free adiabatic demagnetization refrigerator

Added: Oct 17, 2017 3:16 pm

AMENDMENT 001:

THE PURPOSE OF THIS AMENDMENT IS TO ANSWER QUESTIONS RECEIVE IN RESPONSE TO THIS SOLICITATION POSTING, REVISE SPECIFICATIONS, AND EXTEND THE DUE DATE FOR QUOTATIONS.

QUESTION 1:

SPECIFICATON S: "..THE KAPTON SHALL BE THIN AND THE CONDUCTORS SHALL BE A RESISTIVE ALLOY TO REDUCE THE POWER LOAD FROM THIS CAVITY" 

WHAT IS CONSIDERED "THIN" AND WHAT IS THE RESISTIVE ALLOY TO BE USED? IS THERE A SPECIFICATION FOR THE POWER LOAD?

ANSWER 1:

2 MIL (0.002 INCH) KAPTON
2 MIL (0.002 INCH) ALLOY 706 COPPER/NICKLE
THERE IS NO SPECIFIC POWER REQUIREMENT

QUESTION 2:

REQUIREMENT b.i.3 STATES THAT THE COLDER PILL SHALL BE ABLE TO MAINTAIN A TEMPERATURE OF 0.1 K OR LOWER FOR  150 HOURS OR LONGER WITH THERMOMETRY WIRING INSTALL.

DOES THE CONDITION "OR LOWER" MEAN THAT THE HOLD TIME NEEDS TO BE > 150 HOURS AT THE BASE TEMPERATURE OF THE ADR? PLEASE SPECIFY THE HOLD TIME AT A SPECIFIC TEMPERATURE?

ANSWER 2:

REQUIREMENT b.i.3 IS HEREBY REVISED AS FOLLOWS:

b.i.3: THE COLDER PILL SHALL BE ABLE TO MAINTAIN A TEMPERATURE OF  0.1K FOR  150 HOURS OR LONGER WITH THERMOMETRY WIRING INSTALLED.

QUESTION 3.

REQUIREMENT w.ii. STATES THAT A POWER SUPPLY CAPABLE OF PROVIDING SUFFICIENT CURRENT TO THE MAGNET (1.b.v), BRAND OR EQUIVALENT TO THE 20 AMP KEPCO BOP. DOES A 20 A POWER SUPPLY HAVE TO BE PROVIDED REGARDLESS OF THE TYPE OF MAGNENT PROPOSED?

ANSWER 3:

REQUIREMENT w.i.i IS REVISED AS FOLLOWS:

"A POWER SUPPLY CAPABLE OF PROVIDING SUFFICIENT CURRENT TO THE MAGNET (1.b.v), BRAND OR EQUIVALENT TO A KEPCO BOP WITH APPROPRIATE MAXIMUM CURRENT RATING"

THE PROPOSED POWER SUPPLY SHALL MATCH THE PROPOSED MAGNET, THE PROPOSED POWER SUPPLY MAY HAVE A MAXIMUM CURRENT DIFFERENT FROM 20 AMPS.

THE DUE DATE FOR QUOTATIONS IS EXTENDED THROUGH OCTOBER 23, 2017 NLT 3:30 PM EASTERN.

ALL OTHER TERMS REMAIN UNCHANGED.