Minutes: SBS Meeting January 23, 2013 
Attendees: Bogdan Wojtsekhowski, Doug Higinbotham, Nilanga Liyanage, Adam Sarty, Charles Perdrisat, 
John LeRose, Mark Jones, Alexandre Camsonne, Sergey Abrahamyan, John Annand, Vahe Mamyan, 
Evaristo Cisbani, Kondo Gnanvo, Lubomir Pentchev, Albert Shahinyan, Carlos Ayerbe Gayoso, Vina 
Punjabi, Mitra Hashemi Shabestari, Gregg Franklin, Rui De Oliveira
1)	Rui De Oliveira gives talk on sparks and GEM commissioning
a)	See linkpdf or linkpptx
b)	Defines process for powering up GEM’s
i)	Explains underlying processes
ii)	Do not ramp up slowly
iii)	Apply directly the Pashen voltage -50V with 2uA limitation for 100 cm2
iv)	Let the GEM spark a few times to clean dust
v)	After a few seconds the GEM should stop sparking
vi)	After 20 seconds the leakage current can be measured
2)	Vahe Mamyan gives talk on HCAL developments
a)	See link
i)	Test setup with Elgin scintillator (EJ232)
ii)	Various results
b)	Gregg Franklin adds
i)	Elgin Scintillator is too expensive
ii)	 Fermilab is now (literally this week) making samples for us
3)	Kondo Gnanvo gives brief update on GEM and GEM electronics status 
a)	See link
b)	at CERN
c)	at UVa
-JJL