Summary 1/21/16

• Introduction

• Discussion about run groups - NPS run groups are experiments using the same beam time
• Discussion about project length for NPS construction and crystal testing

• Status on PbWO4 testing and selection

• Discussion about SiPM radiation hardness
• Discussion about comparing different irradiation profiles
• Discussion about 3D printing

• NPS PWO crystals at an EIC

• Inner calorimeter requires high resolution for reconstruction of scattered electron - a PbWO4-based calorimeter would be optimal
• The NPS PbWO4 crystals could be used at an EIC and would cover about half the solid angle - about 2000 crystals are needed in total

• Magnet status

• BNL MPS pole tips provide enough iron for the NPS magnet - some modifications are required to conform to the required dimensions
• Discussion about securing the G0 experiment rails for support
• Next steps include: checks if modifications work magnetically (TOSCA), design infrastructure for support and mounting, detailed drawings. After this also need to work on the coil.

• HV base design

• Discussion about pricing in comparison to MRI budget
• Discussion about radiation damage to Arduino processor
• Discussion about timeline - continue development at ODU until about March and then make decision

• Photon sources

• Both designs improve the FOM, have similar collimation - current limitation given by radiation control and beam dump
• Discussion about magnet - ~ 2T-m and as short as possible
• Discussion about science that would be enabled with a photon source

• Timelike Compton Scattering with Transverse Target

• Discussion about showing quantitatively with real error bars what such a TCS measurement would add to DVCS
• Discussion about uncertainty estimations in multivariable fitting