RFP 367893_Amd 03_10.6.2026.pdf

SLAC NATIONAL ACCELERATOR LABORATORY • 2575 SAND HILL ROAD • MENLO PARK • CALIFORNIA • 94025 • USA

Operated by Stanford University for the U.S. Department of Energy

AMENDMENT OF SOLIC. – SUBCONT.MOD. (REV. 05/24/12) SLAC-SCM-GEN-015 PAGE 1 OF 2

SUPPLY CHAIN MANAGEMENT

AMENDMENT OF SOLICITATION/SUBCONTRACT MODIFICATION

Acting Under Contract DE-ACO2-76-SF00515

1. Amendment/Modification Number:

2. Effective Date:

10/6/2026

3. Solicitation/Subcontract Number:

367893

4. Issued By:

The Board of Trustees of the Leland Stanford, Jr. University SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo Park, CA 94025

5. Administered By:

SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo Park, CA 94025 Bldg. 041, M/S: 01

6. Name and Address of Seller:

To: All Offerors

7A. Amendment of Solicitation Number: 367893 7B. Dated (See Item 9):

8A. Modification of Subcontract Number:

8B. Dated (See Item 14D):

9. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 11.

The hour and date specified for receipt of Offers is extended to October 30, 2026 at 5:00 PM PST, is not extended.

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods: (a) By completing items 8 and 13, and return 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter which includes a reference to the solicitation and amendment numbers.

FAILURE OF YOUR ACKNOWLEDGEMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE

RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted you may do so as long as it is received prior to the opening hour and date specified.

10. THIS ITEM ONLY APPLIES TO MODIFICATION OF SUBCONTRACTS

A. This change order is issued pursuant to (specify authority) . The changes set forth in Item 11 are made in the subcontract order number stated in Item 8A.

B. The above numbered subcontract is modified to reflect the administrative changes set forth in Item 11.

C. This supplemental agreement is entered into pursuant of authority of: .

D. Other (Specify type of modification and authority): .

11. Description of Amendment/Modification:

The purpose of this Amendment is as follows:

(1) Incorporate Technical Responses to Request for Clarifications dated 10/6/2026

The following attachments of solicitation RFP 367893(RE) are superseded, incorporated and replaced as follows:

(1) Responses to Request for Clarifications dated 10/6/2026

Except as provided herein, all terms and conditions of the document referenced in Item 7a or 8a, remains unchanged and in full force and effect.

12. Accounting Information:

Previous total value: Change in total value: Revised total value:

Previous funded value: Change in funded value: Revised funded value:

Seller is required to sign and return a copy of this document. (Check if applicable)

The Board of Trustees of the Leland Stanford, Jr.

University SLAC National Accelerator Laboratory

SLAC NATIONAL ACCELERATOR LABORATORY • 2575 SAND HILL ROAD • MENLO PARK • CALIFORNIA • 94025 • USA

Operated by Stanford University for the U.S. Department of Energy

AMENDMENT OF SOLIC. – SUBCONT.MOD. (REV. 05/24/12) SLAC-SCM-GEN-015 PAGE 2 OF 2

13A. Signature of authorized person for seller:

14A. Signature of authorized person:

13B. Name of signer:

14B. Name of signer:

Ryan Enos

13C. Title of signer:

14C. Title of signer:

Sr. Subcontracts Administrator

13D. Date

14D. Date:

ATTACHMENT 02

OFFEROR’s REQUEST FOR CLARIFICATIONS

Request for Proposal No: SLAC_RFP_367893(RE)

BL18 In-Vacuum Undulator

Amendment 03 Dated 10/6/2026

ITEM # RFP

DOCUMENT

REFERENCE

QUESTION RESPONSE RFP ACTIONS

1 Section C Magnetics

a. If the magnetic field is calculated using the same magnetic structure as that employed for the BL17 IVU, the simulation results are as follows:

i. Beff = 0.996T @pole piece gap 6.3mm < spec. 1.07T. Are you seeing similar results in simulation?

ii. (Br = 1.24T)

The SSRL BL17 IVU design served as the starting point for the reference design that underpins the BL18 IVU specification (EN M927). The reference design assumes the BL17 IVU geometry with the following modifications: permanent magnet (PM) width = 80 mm, PM height = 40 mm, Br = 1.31 T, BL18 gap = 6.3 mm. For a 22mm period, Radia simulations indicate that this reference design achieves a K_max_eff = 2.20.

SLAC recognizes that the larger PM dimensions may present fabrication challenges and/or create difficulties meeting the requirements specified in section

6.3.12 of EN M927.

Accordingly, SLAC would also consider a design based on a 23 mm period. Radia simulations of a reference design with a BL17 IVU geometry except PM width = 64.85 mm, PM length = 7.9mm (23.0 mm period), Br = 1.24 T, and BL18 gap = 6.3 mm yield a K_max_eff = 2.225 (B_max_eff >= 1.024).

N/A

REFERENCE

QUESTION RESPONSE RFP ACTIONS

From SLAC's perspective, a key performance requirement is achieving K_max_eff >= 2.20 to ensure acceptable 1st to 3rd harmonic crossover. The deflection parameter in EN M927 Table 2 and associated text would not change if the period requirement were revised to 23 mm with concomitant reduction in number of periods.

2 Section C Length

a. If the design is based on the BL17 reference design, the overall length of BL18 would be as follows:

i. Modules: 22 x 151 = 3,322 mm

ii. End Modules: 22 x 2 = 44 mm

iii. End Blocks ( Magic Finger ): 20 x 2 = 40 mm

iv. RF-Taper+End Flange

Upper Stream: 180 mm

Down Steam: 222 mm

Total Length: 3808 mm > Spec. 3798.3 mm -> Although the resulting overall length would be longer than specified, we would like to know whether this would be considered acceptable.

The EN M927 specification assumes that minor redesign of the taper sections may be sufficient to accommodate 151 full periods at a 22 mm period length while maintaining compliance with the specified overall IVU length.

The key requirement is compliance with the specified longitudinal envelope of

3798.3 ± 2.0 mm. The complete IVU, including the magnetic structure, taper sections, and upstream/downstream interface regions, must fit within this envelope.

SLAC allows that the total number of full-strength periods listed in EN M927 Table 2 may be reduced from 151 to 150 for a 22 mm period magnet if necessary. For a 23 mm period design, the corresponding acceptable number of full-strength periods is 144.

3 Section F Schedule

You specified 18 months ARO. Is this firm?

The 18-month ARO requirement was established to support installation during SSRL’s scheduled accelerator shutdown beginning in August 2028 and to provide sufficient time for on-site inspection and installation preparation. SLAC would consider a delivery schedule of up to 19

Section F

REFERENCE

QUESTION RESPONSE RFP ACTIONS

months ARO as compliant, as this would still provide a narrow margin to meet this installation window. Please note that missing the August 2028 installation window would result in approximately a one-year delay, as the next suitable installation opportunity is currently planned for August 2029.

Proposals with delivery later than 19 months ARO may still be considered, but SLAC will make that determination only after reviewing all offers received.

Regardless of the proposed timeline, it is essential that the schedule is realistic and supported by the vendor’s available resources and commitments.

4 Section J Could you please confirm whether FAR 52.219-9, “Small Business Subcontracting Plan,” is applicable to our subcontract and whether we are required to complete and submit a Small Business Subcontracting Plan as indicated in Section J?

We are a foreign company, and based on the current scope of work, no services or performance will be carried out by us in the United States; our involvement is limited to the supply/delivery of the contracted items.

Based on our understanding of FAR 19.702, contracts performed entirely outside the United States and its outlying areas are exempt from the Small Business Subcontracting Plan requirement, irrespective of the applicable contract value threshold under FAR 19.708.

Could you please confirm whether this interpretation is correct and that we therefore are not required to complete or submit a Small Business Subcontracting Plan?

Your interpretation is correct - Small Business Subcontracting Plan is not required for foreign suppliers where work will be performed outside of the United States.

REFERENCE

QUESTION RESPONSE RFP ACTIONS

5 Geometry of Cu-Ni foil

In your specifications you state that the CuNi foil on top of the magnetic structure should have a width of 70mm and Cu-Layer thickness of 60 µm.

For all IVUs we have realized we used a Cu/Ni foil with slightly different dimensions: Is a deviating geometry (50mm wide 50µm Ni / 50µm Cu) acceptable?

The wake current sheet shall consist of 25-50 µm nickel with 50-70 µm copper on one side.

The sheet width should match the pole width, but shall have a minimum width of 65 mm.

The proposed geometry of 50 mm width with 50 µm Ni / 50 µm Cu is not acceptable due to the minimum width requirement.

The design shall prevent deformation of the wake current sheets that could reduce the nominal 6.13 mm vertical clear aperture (VCA) between opposing sheets and increase the risk of beam interception. The effective magnetic field (Bₑff) and effective deflection (Kₑff) parameters specified in Table 2 of the technical specification (M927) shall be achieved at the nominal 6.13 mm VCA or larger.

N/A

6 Section C Included Vacuum items

From the specifications we understand that the following vacuum items are to be included in the offered scope, whereas the remaining items can be free issued by SLAC:

Ion pumps:

Gamma Vacuum noble diode– included in scope

Controllers & cables – Free issued by SLAC

Ti sublimation pumps:

Free issued by SLAC

Vacuum gauges:

Helix 274 BA 274022 – included in scope

Controller & cables – Free issued by SLAC

Right angle valve:

VAT54132-GE02-0001 – Free issued by

Yes.

At the request of the supplier, SLAC will provide at no cost up to (5) Ti sublimation pumps and (2) VAT54132-GE02-0001 right angle valves and will lend to the supplier an ion pump controller and cables and (2) ion gauge controllers and cables.

The scope of work requests that the supplier provide the ion pump and gauges per Table 4 of the technical specification (M927).

REFERENCE

QUESTION RESPONSE RFP ACTIONS

SLAC

Is our understanding correct?

7 Section C Thermo sensors?

Due to the significantly reduced complication of using the correct conductor and feedthrough material we always use PT100 instead of K-type or T-type sensors. Would this be acceptable?

PT100 resistance temperature detectors (RTDs) are acceptable in lieu of K-type or T-type thermocouples, provided the proposed design meets the functional and environmental requirements of the system.

If PT100 sensors are proposed, SLAC requires:

• Use of 3 or 4-wire PT100 sensors, with all conductors routed through the feedthrough to ensure measurement accuracy and minimize errors associated with lead resistance.

• Sensors, leads, feedthroughs, and all associated materials located within the vacuum envelope shall be compatible with the specified vacuum and bakeout requirements. The vendor shall provide a list of materials used within the vacuum system for review.

• Sensor accuracy shall meet IEC 60751 Class A or Class B requirements.

• Technical documentation shall be provided, including sensor datasheets, response-time specifications, sensor locations, and wiring/pinout drawings.

Proposed PT100-based solutions that satisfy the above requirements will be considered compliant.

N/A

8 Section C Could you please clarify the meaning of specifications in Table 2: Magnetic Requirements of RFP_Section_C_Attachment 01_M927 - BL18 IVU Tech Spec SoW.pdf .

For example, the limits for the vertical first field integral are specified as "<= 100 + 25|X|"

The vertical lines on either side of the variable “X” signify absolute value.

Requirement for the first field integral should be read as: “less than or equal to one hundred Gauss-centimeters plus twenty five

REFERENCE

QUESTION RESPONSE RFP ACTIONS

in Gcm. This means that, for example at x = -

2.5 cm, integral needs to be below (100 + 25*2.5) Gcm = 162.5 Gcm, or the specifications means that at x = 0 cm integral needs to be below 100 Gcm and everywhere else integral needs to be below (100+25) = 125 Gcm. Same question applies to all specifications with |X|.

multiplied by the absolute value of the X position, in centimeters, from the magnetic center of the device where the field integral is being measured, in Gauss-centimeters.”

9 Section C The horizontal off-axis region for the field specifications is very large. Would it be possible to relax the region from |X|<2.5 cm to |X|< 2.0 cm.

The horizontal off-axis region specification can be relaxed to |X|< 2.0 cm with the understanding that there is no remaining margin for adjustment of this parameter and this specification must be met.

N/A

Note:

Complete and e-mail this form to the Sr. Subcontract Administrator, Ryan Enos, at ryane@slac.stanford.edu by September 25, 2026, 5pm PST with any questions or clarifications regarding this proposal.

mailto:ryan.enos@slac.stanford.edu