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DTSTAMP:20130524T032313Z
SUMMARY:2013 Spring Graduate Colloquium Series:  Ken Call/Kyle Turck
DESCRIPTION;ENCODING=QUOTED-PRINTABLE:Ken Call=0D=0A=
Implementation of an Optical Frequency Phased Array=0D=0A=
Phased arrays have been used since early experimentation with radio transmission. Through the use of regularly spaced antennae, signals of identical frequency but differing phase or magnitude can be used to create arbitrary=0D=0A=
radiation patterns by taking advantage of the interference of the signals. Sun, et=0D=0A=
al., have demonstrated the same principle applied to optical frequencies, using an array of emitters crafted as a CMOS device. They were able to demonstrate both the ability to create an arbitrary pattern, and the ability to electronically control the phase of the emitting elements. (Based on: J. Sun, et al., Nature 493=0D=0A=
195–199 (2013))=0D=0A=
Kyle Turck=0D=0A=
Using a “Truncated Mean” Method at Ice Cube=0D=0A=
The Ice Cube experiment measures the energy path length differential (dE/dx) of the muons that result from neutrino interactions. Previous methods have only considered one large path length but this is susceptible to large errors for=0D=0A=
highly energetic muons. The “truncated mean” method segments the path length, rejects the highest 40%, and then sums the remaining resulting in an energy resolution of 0.22 in log10(É), an improvement of 26%. (Based on: R.=0D=0A=
Abbsi, et al., Nuclear Instruments and Methods in Physics Research Section A 703 190-908 (2013)).=0D=0A=
 For more information, please contact: Dr. Linda Olafsen 254-710-2541
LOCATION:Baylor Sciences Building, Room E.125
DTSTART;TZID=US_Central:20130222T153500
DTEND;TZID=US_Central:20130222T170000
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