Questions and Answers 443822.pdf

Procurement and Property

Management Office P.O. Box 5000

Upton, NY 11973-5000

Date: 07/1/2024

Request for Quote RFQ No.

443822 for

Forward HCal SiPMs

Questions and Answers:

Question 1. For successful participation is it necessary to provide both types a) and b)?

Answer 1. Yes

Question 2. Would a 2x2mm2 with 15µm SPAD pitch be considered as type a)?

Answer 2. The "minimum" requirements are detailed on page 7 of the Specifications in the table. Larger area of the SiPM will increase the light collection, so larger is better.

The only limitation here should be, that for the smaller version the area should not exceed 2 mm x 2 mm.

Question 3. In which phase are samples requested? Can we apply and trigger the development project after we are considered in the tender?

Answer 3. The table on page 15 of the Statement of Work lays out the delivery schedule of the batches. Approval for Production should only be necessary for initial production of type (a) and (b) SiPM's (phases 2 and 3 are considered a continuation of phase 1). We will carry out Acceptance Tests (section 3.2.2) which may result in re-inspection and tests (section 4.6). It should be up to the vendor to estimate the scope of any remaining development project which fits into the Deliverables and Schedule.

Question 4. Is a peak PDE at 420nm better than at 450 nm? Our understanding is that you have a minimum PDE requirement at the peak emission wavelengths of your scintillator. In this context, it would be helpful to know how "better than the minimum requirement" would be defined.

Answer 4. The peak sensitivity is not a minimum requirement. Here, a range is given in the table on page 7 in the Specifications, 450-470 nm. In this range, the photon detection efficiency should be larger than 25%.