SLAC National Accelerator Laboratory is operated by Stanford University for the Department of Energy. As a management and operating contractor, subcontracts awarded by the Laboratory are not Federal procurements, and are not directly subject to the Federal Acquisition Regulations in 48 CFR. Nonetheless, certain Federal laws, Executive Orders, and regulations may affect our DOE approved purchasing system, as required by statute, regulation, or contract terms and conditions.

Seeking Source(s) for the following:

1 ea. Chase Multistage 3 He cryogenic cooler unit
type "Berkeley He-10"
Note:

To run from a mechanical cooler (min.heat lift 700mw @ 4k)
Ultra cold 3He stage heat lift approx.3uW @ T <250mk
Intermediate 3He stage heat lift approx.80uW @ T- 1.5 mk.
Hold Time: approx 24 hours continuously.
Cycle time (4 k to 250 mk) < 2 hours.

Addtional features:
Customer supplied ULT thermometry (NTD Germanium, Ru02, or "Cernox" sensors) fitted to both 3He cold heads.
Diode thermometry supplied by CRC Ltd. ( 8 diodes in all)
All wiring carried to MDM-37 connector, mounted on unit.

HE3 Gas in appropriate cylinder at 99.91% atomic purity or better to be supplied by SLAC.