Plans for LSE-130 through CD-2 Gregory Dubois-Felsmann SLAC National Accelerator Laboratory

Role of the LSE-130 ISD LSE-69 is the main Interface Control Document (ICD) between the Camera and Data Management. It depends on two subsidiary documents: – LSE-68 defines the details of the Camera data acquisition interface – LSE-130 defines details of data transfers needed by DM, other than the actual image data LSE-69 defines categories of Camera-to-DM transfers of “support data” – for which LSE-130 will supply the lists of data items: – Design, Assembly, and Laboratory Test Data – CA-DM-CON-ICD-0001 – Camera Conditions Data (i.e., telemetry) – CA-DM-CON-ICD-0002 – Camera Configuration Data (the data used by the OCS configure command) – CA-DM-CON-ICD-0005 The spirit of LSE-130 has been that it should define the data that DM can reasonably anticipate requiring for the pipelines and data quality assessment – and that prudent engineering requires for cross-checks on critical effects – It is desirable to have alternatives to “blind fits” to camera effects in on-sky data

Scope concerns Because this definition for LSE-130 has some inherent elasticity (“prudent engineering”) there are some concerns about deriving Camera-level project scope (i.e., inputs to the CD-2 baseline) from requirements implicit in the data enumerated in LSE-130 The nature of much of the data being discussed is that it helps DM optimize its performance on the Camera we actually receive It is very difficult to work backward from the SRD performance requirements to unchallengeable statements that DM must have data item X with quality Y or fail – especially since we don’t know in detail yet what the actual Camera’s idiosyncrasies will be Some judgment is required and some detailed sensor effects studies may be characterized as science-optimization work to be done under the DESC We should try to keep these management-level decisions out of this session

History of LSE Joint Technical Meeting – Interactive brainstorming of a list of data needed by DM – Meant to be a “Phase 1” list – defining the types of data required but not providing quantitative specifications on precision, spatial granularity, etc. November 2013 – June 2014 – Some refinement by DM – Review by the Camera of the meaning of each item and whether it was consistent with established scope for the Camera’s construction, documentation, and test plans Now – Move to more quantitative definitions – Revise document structure to reflect explicit reliance on documented Camera test plans (replacing some of the previous lists of items) – Capture as input to CD-2 (note earlier Director’s Review) – Future changes with scope implications will need full CCB impact review

LSE-130 draft structure 1.Introduction 2.Camera to DM 1.Design, Assembly, and Laboratory Test Data 1.Component identities 2.Focal place electronic layout 3.Camera geometry 4.Physical sensor characteristics 5.Optical modeling 6.Thermal modeling 7.Documentation 2.Conditions Data 3.Configuration Data 4.General specifications 3.DM to Camera (incomplete)

Plans for LSE-130 Move the full current “list of items” to a DM-level document (handle LDM-272 has been reserved) Modify LSE-130, primarily in sections and 2.1.5, to refer to existing (and upcoming) Camera test plans – E.g., Sensor Electro-optical Test Plan, LCA Mark up LDM-272 to show the requirement/ICD/other document that confirms that each required data item will be available