ACTION ITEMS 03 20 09 Overall Schedule timeline for

ACTION ITEMS (03/20/09) Overall • Schedule: timeline for p. GAPS, including dates for decision-making, needed Design reviews (e. g. PDR in Fall 2009). • p. GAPS technical sub-system chart and division (CH). • More collaborators in Japan (HF). • Define interfaces between sub-systems. • Main goals for p. GAPS : • Demonstrate Si(Li) detectors • Demonstrate Si(Li) cooling • Measure incoherent (and possibly coherent) background. • Verify background model. Si(Li) Detectors • Characterize Semikon detectors in all ways for p. GAPS. • Learn how to build detectors in house and determine packaging. • Explore collaboration with DTU with goal of MOU by spring 2011. • Connection between detectors and electronics needs specification. Si(Li) Electronics & Readout • Define requirements for electronics (high-energy readout, trigger conditions, pedestals • Adapt NCT system to p. GAPS.

TOF/Trigger • Define goals for TOF system for p. GAPS. • Define triggers for p. GAPS and determine particle and trigger rates. • Define segmentation/geometry for TOF system for p. GAPS. • HV and amplifier at PMT ? Gondola • Explore using an existing Gondola for p. GAPS. • Define interfaces with other systems (TOF, Si(Li) detectors, etc. ). • Specify housekeeping, flight computer. • Which components supplied by CU and which by ISAS. • Weight and power options? • Design pointing and aspect requirements (need to point at Sun for thermal). Simulations • Background studies to get readout rate/thresholds. • Start p. GAPS simulations (or estimates). • Activation estimates, followed by input to main detector simulation. • Define the event requirements (# X-rays, pion/proton tracks) and determine sensitivity of b. GAPS.