General Meeting Summary 10/5/16

JLAB DETECTOR UPDATES (Arthur + everyone)

SP-11 aerogel tiles were transported from CUA to JLab (Ian, TH) and are ready for installation

difference to other three trays: has a 90x60 cm^2 inner frame constructed from carbon fiber that can be moved around the tray if spectrometer optics require it
inner frame dimensions are large enough so that tiles will not have to be cut
handling tiles should be done "by-hand" - using tools will damage the surface (have experienced that with higher refractive index tiles)
for 8 layers will need ~430 tiles (have ~40 spares)
every box brought from CUA to JLab includes two tiles that were checked for optical properties - boxes are marked with black tape
in preparation for cosmic tests of SP-11 tray in hall have setup a space in the E Storage Building at JLab
mark tray top/bottom on the tray before installing it in the spectrometer

3x3 PbWO4 prototype is working as expected - completed signals checks
construction of a smaller single-crystal prototype is ongoing - this would be a more efficient setup for the magnetic shielding studies than the 3x3 counter, which was optimized for temperature dependence studies and cooling system
Helmholtz coil setup is available for our tests now, includes a rotatable dark box (may not be reliable in terms of light tightness)

Estimate density of materials for SP-11 tray - important for delta electron generation/contribution in experiments
Finish single-crystal prototype construction for PMT shielding tests in magnetic field
Locate PMTs and active dividers (check with FIU and ODU as well)
Redo current-field measurements for Helmholtz coil
Magnetic shielding studies with mu-metal shield on PMT only and field on order 20-25 Gauss (not exceeding 50 Gauss) - test with different PMT axis orientation along magnetic field

CRYSTAL READOUT ALTERNATIVES (Andres, Rishabh, Rich)

DATA ANALYSES AND NEW IDEAS (Salina, Marco, TH)

Discussion about projections for number of pions detected in with CUA's running kaon experiment and possible additional physics

results look promising
Action item: make estimations of additional processes contributing and possibly limiting kaon data acquisition

Discussion about new initiative: pion and kaon structure function measurements at EIC - data at larger x than what was achievable at HERA would allow to constrain gluon content in pion and kaon (unknown), understand Goldstone theorem (for any spontaneously broken symmetry there is an excitation etc.) and in that context empirical access to origin of hadron masses

DISCUSSION ITEMS FOR NEXT MEETINGS

NEXT MEETING: WED. 12 OCT 2016, 10:00AM (EDT)

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