Attch 1 Statement of Requirements.docx

ATTACHMENT 1-STATEMENT OF REQUIREMENTS

Title: Dilution Refrigerator NB687000-26-00757

I. BACKGROUND INFORMATION

The Quantum Sensors Division of the Physical Measurement Laboratory at NIST requires a dilution refrigerator to support its research efforts in quantum sensors development and quantum information science. We regularly perform experiments at temperatures in the range of 10 mK to 100 mK and increasingly need to measure full 3-inch or 6-inch wafers at these temperatures. We are seeking a dilution refrigerator that can host multiple experiments simultaneously including wafer scale experiments. We are seeking state of the art in terms of minimal required footprint, ease of use, performance and reliability.

Purpose/Objective: The required work provides a modern, easy-to-use dilution refrigerator. The objective is increased throughput on routine experiments at millikelvin temperatures such as wafer scale device screening as well as increased capability for novel detector development.

II. SCOPE

The vendor shall deliver a dilution refrigerator meeting the requirements in this document, inclusive of FOB Destination delivery, training and warranty.

MINIMUM REQUIREMENTS

The Contractor shall provide a system that meets all technical specifications identified below. All line items shall be shipped in the original manufacturer’s packaging and include all original documentation and software, when applicable.

1. Base temperature of 10 mK or lower

2. Cooling power at 100 mK of 200 µW or greater

3. Vibration at base temperature stage <5 nm RMS displacement, with lower preferred

4. Cooldown time

a. <20 hours to reach base temperature with all cabling, but without magnetic shielding installed

b. <36 hours to reach base temperature with all cabling and magnetic shielding installed

5. Large sample volume

a. Sample volume large enough to fit two 20 cm diameter experimental packages

i. For round cryostats, one can be downward facing and one side-facing

ii. For square cryostats, the experimental packages should be side by side (or top/bottom)

b. Larger sample volume preferred, but not at the cost of significantly increased cooldown time

6. Physical size

a. System installable and functional in a space with 210 cm high doors and lights, cable trays and power conduit installed at a height of 213 cm

b. Smaller overall required space preferred

7. Radiation Shields

a. Radiation shields for at least 40 K, 3 K, and still temperature stages

b. Radiation shields to be easily removable/installable by one person

8. Magnetic Shielding

a. Magnetic shields around the mixing chamber volume mounted at some combination of the mixing chamber and higher temperatures stages

b. Shielding to provide >100x reduction of ambient fields at center of the sample space

9. X-ray and gamma ray access

a. Two locations in the sample volume configurable for x-ray or gamma ray access

b. ISO100 flanges above each location in the vacuum can

i. For round cryostats one flange can be on the end cap of the vacuum can, but the other must be side-facing

c. Radiation shields and magnetic shields to have removable panels of approximately 3” diameter, concentrically aligned with the ISO flanges, mounting hole patterns to be discussed later

d. User access to the sample volume for the exchange of samples from all sample positions without moving/removing the ISO flanges

i. Interlock signal on available connector based on the vacuum level in the cryostat to prevent operation of an x-ray source when the dilution refrigerator is not under vacuum

10. Optical fiber access

a. Optical fiber from room temperature to base temperature, terminated with FC/APC connections that suppresses back reflection by at least 40 dB

b. Fiber appropriate for 405 nm light and longer wavelengths as reasonable (e.g. SM400 from Thorlabs)

c. Total transmission better than 50%

d. Mechanically robust and optically dark support for connection at room temperature (e.g. an FC/APC feedthrough) with the same fiber type as the fiber running to the mixing chamber

e. Expansion capability for up to 2 more fibers in the future

i. Expansion port vacuum feedthrough may be a 1/8 inch tube terminated by 1/8 Swagelok as we can use a Teflon ferrule to provide a vacuum tight fiber feedthrough, provided we can thread the fiber down through feedthroughs at each temperature stage

11. Coaxial RF cables

a. Eight (8) low thermal-conductance coax lines from room temperature to base temperature

b. SMA feedthroughs in at least room temperature, 40 K, 3 K, still, and base temperature stages

c. Attenuators at each temperature stage, values to be determined later

d. Superconducting coax for half of the lines below 3 K.

e. Expansion capability up to 16 total coaxial cables in the future

12. Brackets and DC wiring to mount and power four (4) Low-Noise Factory HEMT amplifiers (LNF-LNC4_8F_LG) at 3 K.

a. May be mounted directly to SMA feedthroughs if space allows

b. As an option, LNF-LNC4_8F_LG amplifiers and room temperature power supplies may be included in the quote

13. Brackets and DC wiring to mount and power four (4) low-noise amplifiers from Cryoelec (Cryoelec Wideband LNA) at 40 K

a. May be mounted directly to SMA feedthroughs if space allows

b. As an option, Cryoelec amplifiers may be included in the quote

14. DC wiring of 48 low thermal conductivity twisted pairs to base temperature

a. Connectorized as four (4) MDM25 connectors at base temperature

b. Expansion capability up to 72 twisted pairs in the future

15. Cryogen Free

a. No manipulation of liquid cryogens necessary to operate the refrigerator, including liquid helium and nitrogen

b. No liquid nitrogen needed for a “cold trap”

16. No exchange gas

a. Cooldown and warm up must be doable without the introduction of any exchange gas

b. Warmup heaters to facilitate overnight warm up in a safely automated fashion

17. Slow pump out and vent

a. Ability to throttle rate of pressure change during pump out to a maximum pressure change of 1 torr/s as our experiments often contain fragile components

b. Similar ability to throttle rate of pressure change during venting, with a maximum pressure rate of change of 1 torr/s

18. Overpressure relief valve

a. An overpressure relief valve to limit the pressure in the primary vacuum volume to a safe level for both people and equipment

19. Gas Handling System (GHS)

a. Complete, fully automated gas handling system, including all necessary pumps, valves, etc.

b. Dry roots blower for He circulation

c. Use of metal seals instead of rubber o-ring seals preferred

d. NIST will provide approximately 18 L of He-3, final quantity to be determined by vendor

20. Dilution Unit construction

a. Dilution unit constructed in a manner to reduce the probability of leaks, such as avoiding solder joints and any process that may leave acid residue, preferred

21. Thermometry

a. Calibrated thermometers with readout for at least 40 K, 3 K, still, and mixing chamber stages

b. Feedback-loop control of the base temperature using included electronics

c. Temperature stability under feedback <100 µK RMS for temperatures in the 10 mK to 100 mK range, with lower preferred

22. Remote cryostat control

a. Ability for python code running on a computer separate from the dilution refrigerator to control the dilution refrigerator via ethernet or another connection

b. Capability for operations such as starting the cooldown, then upon reaching base temperature ramping the temperature setpoint for the base temperature stage up and down while making some measurement, then starting the warm up procedure

23. Basic Warranty

a. The Contractor shall provide an initial one (1) year warranty after acceptance. The warranty should include parts and labor (including field service labor and travel required to restore the equipment to normal operation.) The warranty should cover new replacement parts that function equally to originals. The warranty should also cover the software and that the software will perform in compliance with the written materials accompanying the software.

24. Basic Installation and Training

a. Vendor shall install the unit at the NIST Boulder site and replicate factory performance. A technician or engineer from the vendor shall perform the installation, spending at least three days at the NIST Boulder site. The vendor’s technician or engineer shall train at least two NIST personnel on refrigerator operation during the installation. Installation will be coordinated with the NIST Contracting Officer’s Representative (COR).

III. DELIVERABLES

9 months from purchase order

Standards of Acceptance: The NIST TPOC or COR shall review all of the above deliverables and respond with an acceptance or request for revision email to the Contractor Point of Contact (POC) within 2 weeks of receipt of deliverable. This section applies to deliverables which must be reviewed and approved for acceptances (draft plans, drawings, etc.)

IV. PLACE OF PERFORMANCE

The dilution refrigerator will be installed in a laboratory at the NIST site at 325 Broadway, Boulder, CO, 80305. The dilution refrigerator must meet performance requirements at this location.

V. PERIOD OF PERFORMANCE/LEAD TIME

9 months after receipt of order. 30 days after receipt of Dilution Refrigerator.

VI. DELIVERY TERMS

Delivery shall be F.O.B Destination and shall occur in accordance with the delivery due dates provided in the above table.

FOB Destination means: The contractor shall pack and mark the shipment in conformance with carrier requirements, deliver the shipment in good order and condition to the point of delivery specified in the purchase order, be responsible for any loss of and/or damage to the goods occurring before receipt and acceptance of the shipment by the consignee at the delivery point specified in the purchase order; and pay all charges to the specified point of delivery. The contractor shall deliver all Line Items to:

National Institute of Standards and Technology Shipping and Receiving 325 Broadway, Building 22 Boulder, CO 80305

VII. INSPECTION & ACCEPTANCE

In addition to the inspection and acceptance terms articulated in 52.212-4, the Government reserves the right to perform such performance tests and evaluations as defined below to verify specified system performance. Such tests and evaluations, if performed, shall be conducted within the environment that the system is to be operated. The Contractor has the right to be present during the tests and evaluations, if performed, at the Contractor’s expense.

Performance Tests:

1. The dilution refrigerator will be operated under the supervision of the vendor and demonstrate performance specifications including base temperature, cooling power, cool down time, automated pump out and cool down, temperature control, and automated warm up and vent.

2. The physical dimensions and features will be inspected to determine agreement with the lab layout design and specifications.

NIST may choose at its discretion to forego this part of acceptance testing.

A visual inspection of the equipment will be performed by the NIST TPOC to identify surface defects or any form of indication that any equipment was damaged during transport to NIST. The Government shall have sole discretion to require repair or replacement of damaged and/or nonconforming supplies at no cost to the Government. The Government at any time prior to acceptance shall reject the equipment due to defects and/or nonconformance. The vendor is responsible for latent defects discovered any time after final inspection as described in the warranty. However, the extent of its liability shall be prorated over the useful life of the equipment.

Ownership of the equipment shall transfer to NIST upon acceptance by the Government.

The Government will test, inspect, and accept or reject the equipment within 14 days of the receipt of the equipment unless otherwise indicated above. The Government reserves the right to conduct quality assurance testing to confirm that a given instrument(s) meets the manufacturer’s and/or the Government’s performance specifications. It is anticipated that the equipment will meet all manufacturer’s specifications and/or the Government’s performance specifications identified in the most recent operations and maintenance manual for each piece of equipment and/or in this document.

VIII. PAYMENT SCHEDULE

Vendor may proffer a payment schedule. Partial advance payment is acceptable.

NOTE: Partial shipments and partial invoices will not be accepted, unless otherwise requested and accepted by the Contracting Officer prior to award offer. Proposed payment schedules shall be submitted with vendor’s response to the RFQ for consideration.