RFP 367893_Amd 02_9.29.2026.pdf
PDF 636 KB Posted
- Attached to
- BL18 In-Vacuum Undulator
- Solicitation number
- 367893(RE)
- Issued by
-
Department of Energy Office of Science
About this file
This is an Amendment of Solicitation/Subcontract Modification issued by SLAC National Accelerator Laboratory (operated by Stanford University for the U.S. Department of Energy) for solicitation number 367893 related to the design and manufacture of an in-vacuum undulator (IVU) for beamline BL18 at the Stanford Synchrotron Radiation Lightsource (SSRL).
The primary modification extends the proposal due date from October 16, 2026 to October 30, 2026 at 5:00 PM PST and incorporates technical responses to Request for Clarifications dated 9/29/2026. Offerors must acknowledge receipt of this amendment prior to the submission deadline through one of three specified methods. The solicitation requires firms to submit comprehensive proposals in two volumes: Volume I (Technical Proposal) addressing Past Performance, Magnetic Design/Quality Control/Performance, Mechanical/Vacuum System/Motion Control Designs, and Schedule; and Volume II (Business Proposal) covering Financial/Organizational qualifications and pricing. Key technical specifications include achieving an effective deflection parameter (K_max_eff) of 2.20 or greater, compliance with an overall IVU length envelope of 3798.3 ± 2.0 mm, and delivery within 19 months after receipt of order. The clarification responses address magnetic field calculations, allowable design variations (22mm or 23mm period options with corresponding period reductions), schedule flexibility to 19 months ARO, exemption from Small Business Subcontracting Plan requirements for foreign suppliers, vacuum system component specifications, and thermocouple/PT100 sensor requirements. Offerors must be registered in the System for Award Management (SAM), comply with E-Verify employment eligibility verification (FAR 52.222-54), and provide firm fixed pricing with price certifications. SLAC reserves the right to award without discussions but may conduct discussions if deemed necessary.
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Other files
| File | Type | Posted |
|---|---|---|
| RFP 367893_Amd 03_10.6.2026.pdf | ||
| RFP 367893_Amd 01_9.15.2026.pdf | ||
| SLAC_RFP_367893(RE)_BL18 IVU.zip | ZIP file |
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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:
9/29/2026
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) Revise Section L - Instructions to Offerors
- Extend the proposal due date from October 16, 2026 to October 30, 2026
(2) Incorporate Technical Responses to Request for Clarifications dated 9/29/2026
The following attachments of solicitation RFP 367893(RE) are superseded, incorporated and replaced as follows:
(1) Section L - Instructions to Offerors - Amendment 02 dated 9/29/2026
(2) Responses to Request for Clarifications dated 9/29/2026
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:
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
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
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:
9/29/2026
SUPPLY CHAIN MANAGEMENT
Section L – Instructions to Offerors
Amendment 02 dated 9/29/2026
1. GENERAL INFORMATION
Section L – Instructions to Offerors for Firm Fixed Price Subcontract provides general guidance for preparing proposals as well as specific instructions on the format and content of the proposal. The
Offeror’s proposal must include all data and information requested by the ITO and must be submitted in accordance with these instructions. The proposal shall be compliant with the requirements as stated in the Specification. Non-conformance with the instructions provided in this ITO may result in an unfavorable proposal evaluation.
Proposals must be valid for ninety (90) days from the proposal due date. The Offeror shall make a clear statement in its proposal cover letter utilizing the following language, “The undersigned agrees that this offer is valid for ninety (90) days and shall furnish any or all items upon which prices are offered at the price set opposite each item, delivered via email, within the time specified in the schedule.”
The deadline to submit Request for Clarification is due September 25, 2026, at 5:00 PM PST and shall be addressed and e-mailed to the Senior Subcontract Administrator, Ryan Enos at ryane@slac.stanford.edu.
Proposals are due no later than Friday, October 30, 2026, at 5:00pm PST and shall be addressed and e-mailed to the Senior Subcontract Administrator, Ryan Enos at ryane@slac.stanford.edu.
Proposals shall be submitted on the forms furnished or copies thereof and must be manually or electronically signed. If erasures or other changes appear on the forms; the person signing the proposal must initial each erasure or change.
Point of Contact: The Senior Subcontract Administrator, Ryan Enos is the sole point of contact for this acquisition. Address any questions or concerns you may have to the Senior Subcontract
Administrator at e-mail: ryan.enos@slac.stanford.edu. All exchanges of source selection information between SLAC and Offerors will be controlled by the Subcontract Administrator.
Cost/Price Reasonableness and Realism: Unrealistically low or high proposed costs or prices, initially or subsequently, may be grounds for eliminating a proposal from consideration either on the basis that the Offeror does not understand the requirements, or has made an unrealistic offer. Offers should be sufficiently detailed to demonstrate their reasonableness. The burden of proof for credibility of proposed costs/prices rests with the Offeror. The Offeror’s Cost/Price proposal consists of the firm fixed price to deliver the products required as set forth in the solicitation and must be prepared in a manner that is current, accurate, and responsive to the RFP.
SLAC intends to award without discussions with respective Offerors. SLAC, however, reserves the right to conduct discussions if deemed in its best interest.
mailto:ryane@slac.stanford.edu mailto:ryane@slac.stanford.edu mailto:ryan.enos@slac.stanford.edu
Also note that the following requirements apply to this procurement and any resultant Purchase Order:
• E-Verify as required by FAR 52.222-54, “Employment Eligibility Verification”
Marking of Proprietary/Confidential Information. Offerors shall properly mark and identify with a restrictive legend or information markings on pages of the proposal that contain proprietary / confidential information.
For Offeror to be eligible for a subcontract award with SLAC, Offeror shall be registered with the System for Award Management (SAM), the Official U.S. Government system that consolidated the capabilities of CCR / FedReg, ORCA, and EPLS. There is NO fee to register for this site. All potential bidders are to advise / indicate local distributors and make sure the SAM.gov registration requirement extends out to local distributors. Entities may register at no cost directly at the SAM website:
https://sam.gov/content/home?api_key=ROEXk2SBBROUbVQ4L38wSJsGEvZ3oWtLxva9h0zV
**SAM.gov registration is not required for foreign entities but a Unique Entity Identifier must be assigned.
North American Industry Classification Code (NAICS). SLAC has identified the primary NAICS for this requirement as 333248 – All Other Industrial Machinery Manufacturing. Offerors are responsible for ensuring their SAM.gov registration accurately reflects the stated NAICS code.
SLAC will not be liable for any expense incurred in preparing any supplier’s response nor for any expense for materials or services not funded on this subcontract.
2. PREPARATION OF PROPOSALS
Volume I must contain the following information but not contain any pricing information. All pricing information shall be submitted in Volume II – Business Proposal. Proposals will be evaluated based on key evaluation factors thereunder.
Volume I – Technical Proposal
The cover sheet should include:
• Project Title: SSRL BL18 IVU_RFP_367893(RE)
• Volume I - Technical Proposal
• Date of submission
• Subcontractor Name
• Contact information
Factor 1 – Past Performance
Provide a list of the undulator magnets and any IVU’s the supplier has designed, assembled, tuned, and delivered in the previous five years. This list shall include: the type of undulator; the period length; the number of poles; the minimum gap and associated maximum deflection parameter, Kmax; the RMS phase error at minimum gap; the first and second integrals of the vertical field By at (x,y)=0; the achieved integral quadrupole, sextupole, and octupole normal and skew multipoles at (x,y)=0; and the permanent magnet material and pole material where applicable. A clear statement of the supplier’s responsibility for magnet design, magnet assembly, magnetic field shimming/correction/QC, and mechanical system design/construction for each insertion device listed shall be provided as well as the contact information of the associated https://sam.gov/content/home?api_key=ROEXk2SBBROUbVQ4L38wSJsGEvZ3oWtLxva9h0zV customer and suitable permission to make verbal or written communication with the customer contact.
Factor 2 – Magnetic Design, Magnetic Quality Control, and Magnetic Performance
Provide a technical description of a preliminary undulator magnetic design meeting the specifications of SSRL Engineering Note (EN) M927. The technical description shall include the following information as a minimum:
2.1 Field plots of one full, central period magnetic model depicting By(X= 0, Z) and By(X, Z = peak field location) at 6.13 mm VCA (vertical clear aperture, between the wake current sheets) and magnetic pole gap of 6.3mm with the relevant magnetic properties used for the model listed [Br, μ// (recoil permeability), μ⊥(permeability perpendicular to the magnetization vector), pole and PM dimensions, PM set back dimension].
2.2 A preliminary end pole section magnetic design.
2.3 The proposed permanent magnet materials and associated properties, including room temperature intrinsic B-H curves.
2.4 The proposed pole materials and associated properties (B-H curve).
2.5 A summary description of the vendor magnetic QC facilities/capabilities and the undulator magnetic tuning and characterization plan.
2.6 Description of where raw material and magnetic material will be procured from for supply chain security.
2.7 Design and manufacturing schedule to include a capacity chart.
Factor 3 – Mechanical, Vacuum System, and Motion Control Designs
Provide a technical description of a preliminary undulator mechanical, vacuum system and motion control designs meeting the specifications of SSRL EN M927. The technical description shall include the following information as a minimum:
3.1 A sketch and description of the conceptual mechanical design of the magnet keepers and magnet arrays.
3.2 A sketch and description of the conceptual design of the vacuum sub-system including the entrance and exit taper sections.
3.3 A sketch and description of the conceptual mechanical design of the support frame, supports, and gap actuation sub-system
3.4 A summary description of the vendor vacuum facilities/capabilities
3.5 A Quality Assurance Plan outlining clear standards, methods, and responsibilities to prevent errors and ensure a product or service consistently meets requirements
Factor 4 – Schedule
Provide a summary schedule identifying key milestones for design, fabrication, long-lead items, assembly, tuning, and delivery. The schedule must demonstrate completion no later than 19 months after receipt of order. Alternative schedules exceeding 19 months may be submitted for SLAC’s review and consideration.
Volume II – Business Proposal
The cover sheet should include:
• Project Title: SSRL BL18 IVU_RFP_367893(RE)
• Volume I - Technical Proposal
• Date of submission
• Subcontractor Name
• Contact information
Clearly stamp all company financial documents as “Business Sensitive”, if applicable, on any included documents.
Factor 5. Financial / Organizational
Offerors are to provide Dun & Bradstreet report. If Offeror has an SER score greater than 6 or does not participate in Dun & Bradstreet, Offeror will provide audited financial statements for the past two years.
The following are to be filled out, signed and returned with your proposal
• Section J – Attachment 02 – Small Business Subcontracting Plan – to be filled out if applicable (Large Businesses when cost proposal is over $900,000). If not applicable, please indicate the reason.
The following require no action by Offerors – for information purposes only
• Section J – Attachment 01 – Tax Resale and Exempt Certificate
The following are to be filled out, signed and returned with your proposal from Section K
• Section K – Attachment 01A – Domestic entities: Representation and Certification Supplement dated August 2022 OR
• Section K – Attachment 01B – Foreign entities: International Representation and Certifications Supplement dated May 2023
• Section K – Attachment 02 – Buy American Act Certificate dated October 2025
The following is to be filled out, signed and returned with proposal from Section L
• Section L – Attachment 01 – Offeror’s Technical & Business Proposal Qualification Matrix Checklist
• Section L – Attachment 02 – Offeror’s Request for Clarification – to be filled out if applicable
Factor 6. Price
• Submit RFP Section A (completed form), acknowledgement of issued amendments
• Submit RFP Section B with firm fixed prices for each item o Offerors are to submit price certification (e.g. published price lists, redacted invoices or redacted quotes for items procured) o If no price certification method listed above is available, Offeror certificate on company letterhead indicating SLAC is receiving the best price offered and provide a redacted invoice of previously sold in-vacuum undulators or similar specifications or exact specifications.
3. METHOD OF TRANSMISSION / ORGANIZATION / NUMBER OF COPIES / PAGE LIMITS:
Proposals must be submitted via email for purposes of proposal submission deadline. The Offeror shall prepare the proposal as set forth in the Proposal Organization Table. The titles and contents of the volumes shall be as defined in this table, all of which shall be within the required pages limits and with the number of copies as specified. The contents of each proposal volume are described in the ITO paragraph as noted in the table below:
PROPOSAL ORGANIZATION TABLE
Volume ITO Section Volume Title Copies Page Limit
I 2 Technical Proposal 1 None
II 2 Business Proposal 1 None
4. LATE PROPOSALS AND MODIFICATIONS
Proposals and Modifications thereof received by email designated in the Request for Proposals after the due date and time will not be considered.
5. WITHDRAWALS OF PROPOSALS
Proposals may be withdrawn by email, addressed as instructed for the proposal, and received from the Offerors prior to award.
6. AMENDMENT
The right is reserved, as the interests of SLAC may require, to revise or amend the solicitation documents and drawings prior to the due date set for submission of proposals. Such revisions and amendments, if any will be announced on an “Amendment of Solicitation / Subcontract
Modification” form. Copies of such amendment as may be issued will be furnished to all prospective
Offerors. If the revisions and amendments are of a nature which requires material changes in quantities or proposal prices or both, the date set for submission of proposals may be postponed by such number of days, as in the opinion of SLAC will enable the Offerors to develop their proposals. In such case, the Amendment of Solicitation / Subcontract Modification form will include an announcement of the new due date for receipt of proposals.
7. EXPLANATION TO OFFERORS / OFFEROR QUESTIONS & CLARIFICATIONS
Any explanation desired by an Offeror regarding the meaning or interpretation of the Request for
Proposal, drawings, specifications, etc., must be requested in writing to the attention of the
Subcontract Administrator, Ryan Enos, using the form, “Offeror’s Request for Clarifications.”
Sufficient time must be allowed for a reply to reach the Offeror before the due date for submission of proposals. Oral clarification of requirements or instructions provided by SLAC before the award of the Subcontract will not be binding. Questions containing Offeror’s non-proprietary information and corresponding clarifications will be shared with all Offerors. Transmittal shall be sent via email in PDF format.
8. TAXES
Attention of Offerors and their prospective Sub-subcontractors is directed to the Article titled, “Federal, State and Local Taxes” of the General Terms and Conditions and to the California State
Board of Equalization Regulations relating to sales of machinery and equipment for delivery under construction contracts with the United States government. However, responsibility for determination of the applicability of California State Board of Equalization Regulations shall rest solely with the Offeror, and no representation, or guarantee either expressed or implied is made by the Government or SLAC hereunder as to the application thereof. SLAC will not reimburse Offeror for taxes as a separate line item.
9. SPECIFIED PRODUCT AVAILABILITY
Where the Technical Specifications, Statement of Work, or Drawings list a specific product, the
Offerors may assume that the product is commercially available; however, availability within the required performance period may require payment, by the successful Subcontractor at no additional cost to SLAC, of premiums for expediting production or shipment. The Offerors are cautioned to confirm not only product prices, but costs associated with timely acquisition of the product as required to meet performance period requirements. The Offerors are required to notify
SLAC Subcontract Administrator prior to the proposal due date of any obvious product unavailability.
10. SPECIFIED PRODUCT OR METHOD COMPATIBILITY
Where the Technical Specifications, Statement of Work, or Drawings list a specific product or method, the Offerors may assume that the product or method is compatible with other requirements of the Subcontract. The Offerors are required to notify SLAC Subcontract Administrator prior to the date set for receipt of proposals of any obvious incompatibility between a specified product or method and other requirements of the Subcontract.
11. EXCEPTIONS SLAC’S STANDARD TERMS AND CONDITIONS, PROVISIONS, AND / OR
CLAUSES
Offeror must identify any exceptions to SLAC terms and conditions or exceptions to any other element of the requirements that are a part of this RFP, with their proposal. SLAC will not entertain any exceptions not identified in the proposal submission. Exceptions taken may be cause for rejection of a proposal. Inclusion of any assumptions, clarifications, exclusions or conditions may be cause for rejection of the proposal as non-responsive.
ATTACHMENT 02
OFFEROR’s REQUEST FOR CLARIFICATIONS
Request for Proposal No: SLAC_RFP_367893(RE)
BL18 In-Vacuum Undulator
Amendment 02 Dated 9/29/2026
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 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 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
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
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