Minutes: SBS Meeting October 3, 2012
Attendees: Bogdan Wojtsekhowski, John LeRose, Kees de Jager, Mark Jones, Alexandre Camsonne, 
Carlos Ayerbe Gayoso, Seamus Riordan, Nilanga Liyanage, Gordon Cates, Brian Quinn

1)	Gordon Cates gives Polarized 3He target update
a)	See link
i)	News
ii)	Layouts (box fits inside the Transversity coils)
iii)	Field Considerations
(1)	Studies (longitudinal is concerned with the z direction, transverse with the x direction)
(2)	Gradients that matter when not doing polarimetry
(a)	Worry about the gradients
(3)	Gradients that matter when doing AFP
(a)	Mixed results, no show stoppers
(4)	Conclusion:
(a)	1 m Barrel potentially problematic
(b)	Still studying implications of all the gradients
(c)	Transversity coils appear to be sufficient to do the job
iv)	Questions:
(1)	Transversity coil diameter? About 2 m
(2)	Should we study the fields with the BigBite magnet in proximity? Yes.
2)	Bogdan Wojtsekhowski talks about the Upgraded Detector system of the BigBite spectrometer
a)	See link
i)	Shows the A1n layout
ii)	History of BigBite detectors
(1)	Limitations of the MWPC setup
iii)	Present plan:
(1)	INFN front chambers (GEMs)
(2)	Gas Cherenkov
(3)	More GEMs
(4)	Lead Glass Calorimeter
(5)	Highly segmented timing hodoscope
iv)	Reviews details of old design (performance parameters)
v)	Reviews details of new design
vi)	Slide 15 shows dimensions
vii)	Gives Gas Cherenkov details
viii)	Summary
(1)	Lists collaborators
(2)	Timeline- could be ready by 2015 (not certain, driven by collaborators schedules and 
effort level)
   -JJL