BLTWG Meeting 10/31/2011

• Time: 11:30 EST
• Place: ESNET and EVO (with telephone bridge id 10-1655)
• Connecting: instructions are here
• Present: Richard J., Ken L., Igor S., Tim W., Alex S., Hovanes E., Eugene C., Yi Q., and Mike D.

Agenda

1. Announcements
2. Plans for diamond radiator fabrication at Glasgow - K. Livingston
3. Beam test results for the microscope prototype - R. Jones
4. Beam test results for the active collimator - R. Jones
5. State of the simulation of pair spectrometer and polarimeter - discussion

Notes

Ratio of difference over sum of currents in the two inner wedges of the active collimator, versus displacement of the horizontal translation stage carrying the active collimator across the beam. There are a couple of places during this scan when the beam tripped off, which show up either as zero or points with large error bars. No cleanup at all has been applied to these data; everything collected by the instrument during this scan is shown in the figure.

Appendix: (microscope beam test)

T_sipm - T_RF versus maximum FADC amplitude

Time resolution, sigma(T_RF - T_SiPM) versus maximum FADC amplitude (after applying time-walk corrections)

File:Sc res.pdf Time resolution of the trigger scintillators