Attachment B_Specifications 24 Apr 2024.pdf

Requirements / Specification Document

TITLE: Cryogenic x-y-z Positioner

Requesting Laboratory / Division / Group:

Communications Technology Laboratory Radio Frequency Technology Division Radio Frequency Electronics Group, 672.03

General Statement of Need:

NIST needs a low-power X-Y-Z positioning stage for direct use at 20 mK in a dilution refrigerator with accurate position encoding and a closed-loop controller. The stages must be usable at 20 mK and result in minimal heating of the stage, reducing warmup and keeping the time to cool the temperature of the mixing stage back to 20 mK as short as possible. The materials must be non-magnetic as superconducting circuits sensitive to magnetic fields will be tested.

The current NIST Dilution Refrigerator is designed for positioning stacks comprised of two attocube ANPx341/RES+/LT/HV - linear x-nanopositioners and one attocube ANPz101/RES+/HL/LT/HV - linear z-nanopositioner OR the NP-450-X linear x-nanopositioners and the NP-240-Z linear z nanopositioner. To ensure that NIST does not incur additional costs over the purchase price, the vendor would need to provide for any mechanical adapters needed to fit their positioners into the already designed space in the dilution refrigerator, the electrical adapters needed to use the existing wiring currently installed in the NIST Dilution Refrigerator and be controllable using the existing NIST attocube and Renaissance controllers.

Current solutions are primarily based on piezoelectric positioners. The power P dissipated in piezoelectric positioners with a capacitance C and loss tangent tan(δ) driven by a sinusoidal signal with frequency f and RMS voltage V in the piezoelectric actuators is given by P = V2 f C tan(δ). If the positioners travel a step size ∆s during each cycle of the sinusoidal drive signal, the total time ∆t to move the positioners a distance d is given by ∆t = d/(f ∆s). Thus, the energy dissipation E required to move a distance d is E = P ∆t = P d/(f ∆s) = V2 C tan(δ) (d/∆s).

To reduce power dissipation at low temperatures to an acceptable level, NIST requires that the energy dissipated in the positioner per unit length of travel E/d = V2 C tan(δ) / ∆s be less than 40 mJ/mm at 4 K for a piezoelectric drive voltage V capable of exerting force of 100 g and drive speed of f ∆s > 0.1 mm/s.

In addition, the power dissipated at the positioner required to determine the position of each encoder must be less than 100 nW and the Z positioners used in the stage must be able to lift 100 g at cryogenic temperatures. Finally, the encoders and closed-loop positioning algorithm must be able to repeatably place each positioner within ±2 um.

Item Specifications and Quantities:

Item 1: Cryogenic x-y-z Positioner Quantity: 1 Specifications: 1.1 20 mm x and y travel range, 4 mm z travel range

1.2 Closed-loop positioning repeatability within ±2 um on all axes.

1.3 Non-magnetic materials.

1.4 Positioners and encoders designed to operate and meet

specifications to 10 mK and in high vacuum environment.

1.5 The energy dissipated in the positioner per unit length of travel

E/d = V2 C tan(δ) / ∆s is less than 40 mJ/mm at 4 K for a piezoelectric drive voltage V capable of exerting force of 100 g and drive speed of f ∆s > 0.1 mm/s.

1.6 The power required to determine the position of each encoder is less than 100 nW.

1.7 The Z positioners must be capable of lifting 100 g at cryogenic temperatures.

1.8 Positioners suitable for use in high-vacuum environment

without outgassing.

1.9 All screws, wiring and mounting hardware required.

1.10 The x-y-z positioner, possibly after being fitted with suitable mounting adapters supplied by the vendor, must fit into the existing NIST dilution refrigerator. This requires that the x-y-z positioner be a direct replacement for the current positioner stacks comprised of two attocube ANPx341/RES+/LT/HV -linear x-nanopositioners (see https://www.attocube.com/en/products/nanopositioners/low-temperature-nanopositioners/anpx341reslthv-linear-x-nanopositioner) and one attocube ANPz101/RES+/HL/LT/HV -linear z-nanopositioner (see https://www.attocube.com/en/products/nanopositioners/low-temperature-nanopositioners/anpz101reslthv-linear-z-nanopositioner). Thus, the x-y-z positioner stack must use the same screw pattern as the attocube stack to attach to the https://www.attocube.com/en/products/nanopositioners/low-temperature-nanopositioners/anpz101reslthv-linear-z-nanopositioner https://www.attocube.com/en/products/nanopositioners/low-temperature-nanopositioners/anpz101reslthv-linear-z-nanopositioner https://www.attocube.com/en/products/nanopositioners/low-temperature-nanopositioners/anpz101reslthv-linear-z-nanopositioner baseplate, occupy no more than a 45 mm x 45 mm footprint when centered in x and y. The top mounting surface of the z positioner must be horizontal, have the same screw patterns on the top of the z-nanopositioner as the attocube z positioner to attach items being manipulated, and must be the highest point of the positioner stack. Furthermore, when fully retracted, the x-y-z positioner must not be any higher than 51

mm. The dimensions and hole patterns of the attocube positioners can be found in the pdf files anpx341reslthv-linear-x-nanopositioner.pdf and anpz101reslthv-linear-z-nanopositioner.pdf after pressing the download button on the pages cited just above in this specification item.

1.11 The positioners must use existing NIST-owned controllers and wiring in our BlueFors dilution refrigerator. These include 1) the attocube ANC350/3/RES/Vac Piezo MotionController for closed loop control of up to 3 attocube positioners with /RES encoders AND 2) the Renaissance NP-Drive Slip-Stick Drive Controller (https://ren-sci.com/electronics#) and the Renaissance PREAMP-CAP-ALL Preamplifier for Encoded Stages. Either controller may be used. However, the electrical connectors on the x-y-z positioner, possibly after adding an electrical adapter supplied by the vendor, must be functionally identical to the corresponding electrical male PEEK connectors compatible with those used by attocube and Renaissance, which have part numbers 1021498 3-pin PEEK connector (solder point) and 1010784 ACC 5-Pin PEEK Connector (Soldering Point). These connectors have a 2 mm nominal pin spacing, a 0.47 mm nominal pin diameters and a 4 mm nominal pin lengths. There should be a two-wire differential drive line with a two-pin connector and a three-wire sense line with a three-pin connector for the sensor for each positioner in the x-y-z positioner stack. The drive and sense lines must be at least 28 cm long. If using the Renaissance PREAMP-CAP-ALL Preamplifier for Encoded Stages for position readout, cables of at least 28 cm long and adapters required to connect to female SMA ports in the cryostat driven by the Renaissance PREAMP- CAP-ALL Preamplifier must be provided with the positioners.

Item 2: Cryogenic x-y-z Positioner

Quantity: 1 Optional item as noted in warranty block below) Specifications: Same as Item 1.

Procurement Support Information and Ancillary Services:

Section Requirements/Specifications

Planning Considerations ☒ N/A

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[Explain Requirements.] ☐ US citizen required on-site (foreign nationals require pre-registration 30 days prior to visit.)

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Shipping Address:

☒ NIST-Boulder

ATTN: TBA

Mail Stop: TBA 325 Broadway Boulder, CO 80305

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ATTN:

Mail Stop:

100 Bureau Dr Gaithersburg MD 20899

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Inspection and Acceptance ☐ N/A

[Inspection Requirements Per Item (Who, When, What, Where)] ☒ On-Site

☐ Acceptance Expected to Not to Exceed 7 Business Days

☒ Acceptance Expected to Exceed 7 Business Days:

30 days. Testing is complex time consuming.

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[Explanation]

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Training

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Warranty ☐ N/A

Standard manufacturer warranty acceptable Warranty Length: 1 year What is included?

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☒ 1 Option Period Option quantity for EA 1 additional controller as defined in specifications document.

☐ 2 Option Periods ☐ 3 Option Periods ☐ 4 Option Periods (Maximum)

Calibration [Describe Calibration Requirements Per Item]

☒ N/A Calibration Plan Length: [i.e. 3 - Years]

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Length: [i.e. 1 – Year / 6 - Months] ☐ 2 Option Periods

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☐ Other [Enter Other Requirements] ☐ Requirements:

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☐ 1 Option Period

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NOTE TO VENDOR: To the maximum extent possible, include travel requirement estimates as part of pertinent sections above (Installation, Maintenance, Repair, etc.). Otherwise, Travel will be a separate line item, reimbursable per the Federal Travel Regulation.